busybox/editors/sed.c

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/* vi: set sw=4 ts=4: */
1999-10-28 21:36:25 +05:30
/*
* sed.c - very minimalist version of sed
1999-10-28 21:36:25 +05:30
*
* Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
* Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
* Copyright (C) 2002 Matt Kraai
2007-09-21 18:46:32 +05:30
* Copyright (C) 2003 by Glenn McGrath
* Copyright (C) 2003,2004 by Rob Landley <rob@landley.net>
*
* MAINTAINER: Rob Landley <rob@landley.net>
*
* Licensed under GPLv2, see file LICENSE in this source tree.
1999-10-28 21:36:25 +05:30
*/
/* Code overview.
*
* Files are laid out to avoid unnecessary function declarations. So for
* example, every function add_cmd calls occurs before add_cmd in this file.
*
* add_cmd() is called on each line of sed command text (from a file or from
* the command line). It calls get_address() and parse_cmd_args(). The
* resulting sed_cmd_t structures are appended to a linked list
* (G.sed_cmd_head/G.sed_cmd_tail).
*
* process_files() does actual sedding, reading data lines from each input FILE*
* (which could be stdin) and applying the sed command list (sed_cmd_head) to
* each of the resulting lines.
*
* sed_main() is where external code calls into this, with a command line.
*/
/* Supported features and commands in this version of sed:
*
* - comments ('#')
* - address matching: num|/matchstr/[,num|/matchstr/|$]command
* - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags)
* - edit commands: (a)ppend, (i)nsert, (c)hange
* - file commands: (r)ead
* - backreferences in substitution expressions (\0, \1, \2...\9)
* - grouped commands: {cmd1;cmd2}
* - transliteration (y/source-chars/dest-chars/)
* - pattern space hold space storing / swapping (g, h, x)
* - labels / branching (: label, b, t, T)
*
* (Note: Specifying an address (range) to match is *optional*; commands
* default to the whole pattern space if no specific address match was
* requested.)
*
* Todo:
* - Create a wrapper around regex to make libc's regex conform with sed
*
* Reference
* http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/sed.html
* http://sed.sourceforge.net/sedfaq3.html
*/
//config:config SED
//config: bool "sed (12 kb)"
//config: default y
//config: help
//config: sed is used to perform text transformations on a file
//config: or input from a pipeline.
//applet:IF_SED(APPLET(sed, BB_DIR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_SED) += sed.o
//usage:#define sed_trivial_usage
//usage: "[-i[SFX]] [-nrE] [-f FILE]... [-e CMD]... [FILE]...\n"
//usage: "or: sed [-i[SFX]] [-nrE] CMD [FILE]..."
//usage:#define sed_full_usage "\n\n"
//usage: " -e CMD Add CMD to sed commands to be executed"
//usage: "\n -f FILE Add FILE contents to sed commands to be executed"
//usage: "\n -i[SFX] Edit files in-place (otherwise write to stdout)"
//usage: "\n Optionally back files up, appending SFX"
//usage: "\n -n Suppress automatic printing of pattern space"
//usage: "\n -r,-E Use extended regex syntax"
//usage: "\n"
//usage: "\nIf no -e or -f, the first non-option argument is the sed command string."
//usage: "\nRemaining arguments are input files (stdin if none)."
//usage:
//usage:#define sed_example_usage
//usage: "$ echo \"foo\" | sed -e 's/f[a-zA-Z]o/bar/g'\n"
//usage: "bar\n"
#include "libbb.h"
#include "common_bufsiz.h"
#include "xregex.h"
#if 0
# define dbg(...) bb_error_msg(__VA_ARGS__)
#else
# define dbg(...) ((void)0)
#endif
enum {
OPT_in_place = 1 << 0,
};
struct sed_FILE {
struct sed_FILE *next; /* Next (linked list, NULL terminated) */
const char *fname;
FILE *fp;
};
/* Each sed command turns into one of these structures. */
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typedef struct sed_cmd_s {
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/* Ordered by alignment requirements: currently 36 bytes on x86 */
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struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */
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/* address storage */
regex_t *beg_match; /* sed -e '/match/cmd' */
regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
regex_t *sub_match; /* For 's/sub_match/string/' */
int beg_line; /* 'sed 1p' 0 == apply commands to all lines */
int beg_line_orig; /* copy of the above, needed for -i */
int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($). -2-N = +N */
int end_line_orig;
FILE *sw_file; /* File (sw) command writes to, NULL for none. */
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char *string; /* Data string for (saicytb) commands. */
unsigned which_match; /* (s) Which match to replace (0 for all) */
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/* Bitfields (gcc won't group them if we don't) */
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unsigned invert:1; /* the '!' after the address */
unsigned in_match:1; /* Next line also included in match? */
unsigned sub_p:1; /* (s) print option */
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char sw_last_char; /* Last line written by (sw) had no '\n' */
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/* GENERAL FIELDS */
char cmd; /* The command char: abcdDgGhHilnNpPqrstwxy:={} */
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} sed_cmd_t;
static const char semicolon_whitespace[] ALIGN1 = "; \n\r\t\v";
struct globals {
/* options */
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int be_quiet, regex_type;
FILE *nonstdout;
char *outname, *hold_space;
smallint exitcode;
/* list of input files */
int current_input_file, last_input_file;
char **input_file_list;
FILE *current_fp;
regmatch_t regmatch[10];
regex_t *previous_regex_ptr;
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/* linked list of sed commands */
sed_cmd_t *sed_cmd_head, **sed_cmd_tail;
/* linked list of append lines */
llist_t *append_head;
/* linked list of FILEs opened for 'w' and s///w'.
* Needed to handle duplicate fnames: sed '/a/w F;/b/w F'
*/
struct sed_FILE *FILE_head;
char *add_cmd_line;
struct pipeline {
char *buf; /* Space to hold string */
int idx; /* Space used */
int len; /* Space allocated */
} pipeline;
} FIX_ALIASING;
#define G (*(struct globals*)bb_common_bufsiz1)
#define INIT_G() do { \
setup_common_bufsiz(); \
BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
G.sed_cmd_tail = &G.sed_cmd_head; \
} while (0)
#if ENABLE_FEATURE_CLEAN_UP
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static void sed_free_and_close_stuff(void)
{
sed_cmd_t *sed_cmd = G.sed_cmd_head;
llist_free(G.append_head, free);
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while (sed_cmd) {
sed_cmd_t *sed_cmd_next = sed_cmd->next;
if (sed_cmd->sw_file)
fclose(sed_cmd->sw_file);
/* Used to free regexps, but now there is code
* in get_address() which can reuse a regexp
* for constructs as /regexp/cmd1;//cmd2
* leading to double-frees here:
*/
//if (sed_cmd->beg_match) {
// regfree(sed_cmd->beg_match);
// free(sed_cmd->beg_match);
//}
//if (sed_cmd->end_match) {
// regfree(sed_cmd->end_match);
// free(sed_cmd->end_match);
//}
//if (sed_cmd->sub_match) {
// regfree(sed_cmd->sub_match);
// free(sed_cmd->sub_match);
//}
free(sed_cmd->string);
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free(sed_cmd);
sed_cmd = sed_cmd_next;
}
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free(G.hold_space);
if (G.current_fp)
fclose(G.current_fp);
}
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#else
void sed_free_and_close_stuff(void);
#endif
static FILE *sed_xfopen_w(const char *fname)
{
struct sed_FILE **pp = &G.FILE_head;
struct sed_FILE *cur;
while ((cur = *pp) != NULL) {
if (strcmp(cur->fname, fname) == 0)
return cur->fp;
pp = &cur->next;
}
*pp = cur = xzalloc(sizeof(*cur));
/*cur->next = NULL; - already is */
cur->fname = xstrdup(fname);
cur->fp = xfopen_for_write(fname);
return cur->fp;
}
/* If something bad happens during -i operation, delete temp file */
static void cleanup_outname(void)
{
if (G.outname) unlink(G.outname);
}
/* strcpy, replacing "\from" with 'to'. If to is NUL, replacing "\any" with 'any' */
static unsigned parse_escapes(char *dest, const char *string, int len, char from, char to)
{
char *d = dest;
int i = 0;
if (len == -1)
len = strlen(string);
while (i < len) {
if (string[i] == '\\') {
if (!to || string[i+1] == from) {
if ((*d = to ? to : string[i+1]) == '\0')
return d - dest;
i += 2;
d++;
continue;
}
i++; /* skip backslash in string[] */
*d++ = '\\';
/* fall through: copy next char verbatim */
}
if ((*d = string[i++]) == '\0')
return d - dest;
d++;
}
*d = '\0';
return d - dest;
}
static char *copy_parsing_escapes(const char *string, int len)
{
const char *s;
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char *dest = xmalloc(len + 1);
/* sed recognizes \n */
/* GNU sed also recognizes \t and \r */
for (s = "\nn\tt\rr"; *s; s += 2) {
len = parse_escapes(dest, string, len, s[1], s[0]);
string = dest;
}
return dest;
}
/*
* index_of_next_unescaped_regexp_delim - walks left to right through a string
* beginning at a specified index and returns the index of the next regular
* expression delimiter (typically a forward slash ('/')) not preceded by
* a backslash ('\'). A negative delimiter disables square bracket checking.
*/
static int index_of_next_unescaped_regexp_delim(int delimiter, const char *str)
{
int bracket = -1;
int escaped = 0;
int idx = 0;
char ch;
if (delimiter < 0) {
bracket--;
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delimiter = -delimiter;
}
for (; (ch = str[idx]) != '\0'; idx++) {
if (bracket >= 0) {
if (ch == ']'
&& !(bracket == idx - 1 || (bracket == idx - 2 && str[idx - 1] == '^'))
) {
bracket = -1;
}
} else if (escaped)
escaped = 0;
else if (ch == '\\')
escaped = 1;
else if (bracket == -1 && ch == '[')
bracket = idx;
else if (ch == delimiter)
return idx;
}
/* if we make it to here, we've hit the end of the string */
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bb_error_msg_and_die("unmatched '%c'", delimiter);
}
/*
* Returns the index of the third delimiter
*/
static int parse_regex_delim(const char *cmdstr, char **match, char **replace)
{
const char *cmdstr_ptr = cmdstr;
unsigned char delimiter;
int idx = 0;
/* verify that the 's' or 'y' is followed by something. That something
* (typically a 'slash') is now our regexp delimiter... */
if (*cmdstr == '\0')
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("bad format in substitution expression");
delimiter = *cmdstr_ptr++;
/* save the match string */
idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr);
*match = copy_parsing_escapes(cmdstr_ptr, idx);
/* save the replacement string */
cmdstr_ptr += idx + 1;
idx = index_of_next_unescaped_regexp_delim(- (int)delimiter, cmdstr_ptr);
*replace = copy_parsing_escapes(cmdstr_ptr, idx);
2003-04-08 17:26:11 +05:30
return ((cmdstr_ptr - cmdstr) + idx);
}
/*
* returns the index in the string just past where the address ends.
*/
static int get_address(const char *my_str, int *linenum, regex_t ** regex)
{
const char *pos = my_str;
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if (isdigit(*my_str)) {
*linenum = strtol(my_str, (char**)&pos, 10);
/* endstr shouldn't ever equal NULL */
} else if (*my_str == '$') {
*linenum = -1;
pos++;
} else if (*my_str == '/' || *my_str == '\\') {
int next;
char delimiter;
char *temp;
delimiter = '/';
if (*my_str == '\\')
delimiter = *++pos;
next = index_of_next_unescaped_regexp_delim(delimiter, ++pos);
if (next != 0) {
temp = copy_parsing_escapes(pos, next);
G.previous_regex_ptr = *regex = xzalloc(sizeof(regex_t));
xregcomp(*regex, temp, G.regex_type);
free(temp);
} else {
*regex = G.previous_regex_ptr;
if (!G.previous_regex_ptr)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("no previous regexp");
}
/* Move position to next character after last delimiter */
pos += (next+1);
}
return pos - my_str;
}
/* Grab a filename. Whitespace at start is skipped, then goes to EOL. */
static int parse_file_cmd(/*sed_cmd_t *sed_cmd,*/ const char *filecmdstr, char **retval)
{
const char *start;
const char *eol;
/* Skip whitespace, then grab filename to end of line */
start = skip_whitespace(filecmdstr);
eol = strchrnul(start, '\n');
if (eol == start)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("empty filename");
if (*eol) {
/* If lines glued together, put backslash back. */
*retval = xstrndup(start, eol-start + 1);
(*retval)[eol-start] = '\\';
} else {
/* eol is NUL */
*retval = xstrdup(start);
}
return eol - filecmdstr;
}
static int parse_subst_cmd(sed_cmd_t *sed_cmd, const char *substr)
{
int cflags = G.regex_type;
char *match;
int idx;
/*
* A substitution command should look something like this:
* s/match/replace/ #giIpw
* || | |||
* mandatory optional
*/
idx = parse_regex_delim(substr, &match, &sed_cmd->string);
/* determine the number of back references in the match string */
/* Note: we compute this here rather than in the do_subst_command()
* function to save processor time, at the expense of a little more memory
* (4 bits) per sed_cmd */
2003-04-08 17:26:11 +05:30
/* process the flags */
sed_cmd->which_match = 1;
dbg("s flags:'%s'", substr + idx + 1);
while (substr[++idx]) {
dbg("s flag:'%c'", substr[idx]);
/* Parse match number */
if (isdigit(substr[idx])) {
if (match[0] != '^') {
/* Match 0 treated as all, multiple matches we take the last one. */
const char *pos = substr + idx;
/* FIXME: error check? */
sed_cmd->which_match = (unsigned)strtol(substr+idx, (char**) &pos, 10);
idx = pos - substr - 1;
}
continue;
}
/* Skip spaces */
if (isspace(substr[idx]))
continue;
switch (substr[idx]) {
2006-10-25 18:16:03 +05:30
/* Replace all occurrences */
case 'g':
sed_cmd->which_match = 0;
2006-10-25 18:16:03 +05:30
break;
/* Print pattern space */
case 'p':
sed_cmd->sub_p = 1;
break;
/* Write to file */
case 'w':
{
char *fname;
idx += parse_file_cmd(/*sed_cmd,*/ substr+idx+1, &fname);
sed_cmd->sw_file = sed_xfopen_w(fname);
sed_cmd->sw_last_char = '\n';
free(fname);
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break;
}
/* Ignore case (gnu extension) */
case 'i':
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case 'I':
cflags |= REG_ICASE;
break;
/* Comment */
case '#':
// while (substr[++idx]) continue;
idx += strlen(substr + idx); // same
2006-10-25 18:16:03 +05:30
/* Fall through */
/* End of command */
case ';':
case '}':
goto out;
default:
dbg("s bad flags:'%s'", substr + idx);
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("bad option in substitution expression");
}
}
out:
/* compile the match string into a regex */
if (*match != '\0') {
/* If match is empty, we use last regex used at runtime */
sed_cmd->sub_match = xzalloc(sizeof(regex_t));
dbg("xregcomp('%s',%x)", match, cflags);
xregcomp(sed_cmd->sub_match, match, cflags);
dbg("regcomp ok");
}
free(match);
return idx;
}
/*
* Process the commands arguments
*/
static const char *parse_cmd_args(sed_cmd_t *sed_cmd, const char *cmdstr)
{
static const char cmd_letters[] ALIGN1 = "saicrw:btTydDgGhHlnNpPqx={}";
enum {
IDX_s = 0,
IDX_a,
IDX_i,
IDX_c,
IDX_r,
IDX_w,
IDX_colon,
IDX_b,
IDX_t,
IDX_T,
IDX_y,
IDX_d,
IDX_D,
IDX_g,
IDX_G,
IDX_h,
IDX_H,
IDX_l,
IDX_n,
IDX_N,
IDX_p,
IDX_P,
IDX_q,
IDX_x,
IDX_equal,
IDX_lbrace,
IDX_rbrace,
IDX_nul
};
unsigned idx;
BUILD_BUG_ON(sizeof(cmd_letters)-1 != IDX_nul);
idx = strchrnul(cmd_letters, sed_cmd->cmd) - cmd_letters;
/* handle (s)ubstitution command */
if (idx == IDX_s) {
cmdstr += parse_subst_cmd(sed_cmd, cmdstr);
}
/* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */
else if (idx <= IDX_c) { /* a,i,c */
unsigned len;
if (idx < IDX_c) { /* a,i */
if (sed_cmd->end_line || sed_cmd->end_match)
bb_error_msg_and_die("command '%c' uses only one address", sed_cmd->cmd);
}
for (;;) {
if (*cmdstr == '\n' || *cmdstr == '\\') {
cmdstr++;
break;
}
if (!isspace(*cmdstr))
break;
cmdstr++;
}
len = strlen(cmdstr);
sed_cmd->string = copy_parsing_escapes(cmdstr, len);
cmdstr += len;
/* "\anychar" -> "anychar" */
parse_escapes(sed_cmd->string, sed_cmd->string, -1, '\0', '\0');
}
/* handle file cmds: (r)ead */
else if (idx <= IDX_w) { /* r,w */
if (idx < IDX_w) { /* r */
if (sed_cmd->end_line || sed_cmd->end_match)
bb_error_msg_and_die("command '%c' uses only one address", sed_cmd->cmd);
}
cmdstr += parse_file_cmd(/*sed_cmd,*/ cmdstr, &sed_cmd->string);
if (sed_cmd->cmd == 'w') {
sed_cmd->sw_file = sed_xfopen_w(sed_cmd->string);
sed_cmd->sw_last_char = '\n';
}
}
/* handle branch commands */
else if (idx <= IDX_T) { /* :,b,t,T */
int length;
2006-10-25 18:16:03 +05:30
cmdstr = skip_whitespace(cmdstr);
length = strcspn(cmdstr, semicolon_whitespace);
if (length) {
sed_cmd->string = xstrndup(cmdstr, length);
cmdstr += length;
}
}
/* translation command */
else if (idx == IDX_y) {
char *match, *replace;
int i = cmdstr[0];
cmdstr += parse_regex_delim(cmdstr, &match, &replace)+1;
/* \n already parsed, but \delimiter needs unescaping. */
parse_escapes(match, match, -1, i, i);
parse_escapes(replace, replace, -1, i, i);
sed_cmd->string = xzalloc((strlen(match) + 1) * 2);
for (i = 0; match[i] && replace[i]; i++) {
sed_cmd->string[i*2] = match[i];
sed_cmd->string[i*2+1] = replace[i];
}
free(match);
free(replace);
}
/* if it wasn't a single-letter command that takes no arguments
* then it must be an invalid command.
*/
else if (idx >= IDX_nul) { /* not d,D,g,G,h,H,l,n,N,p,P,q,x,=,{,} */
bb_error_msg_and_die("unsupported command %c", sed_cmd->cmd);
}
/* give back whatever's left over */
return cmdstr;
}
/* Parse address+command sets, skipping comment lines. */
static void add_cmd(const char *cmdstr)
{
sed_cmd_t *sed_cmd;
unsigned len, n;
/* Append this line to any unfinished line from last time. */
if (G.add_cmd_line) {
char *tp = xasprintf("%s\n%s", G.add_cmd_line, cmdstr);
free(G.add_cmd_line);
cmdstr = G.add_cmd_line = tp;
2006-06-05 23:02:44 +05:30
}
/* If this line ends with unescaped backslash, request next line. */
n = len = strlen(cmdstr);
while (n && cmdstr[n-1] == '\\')
n--;
if ((len - n) & 1) { /* if odd number of trailing backslashes */
if (!G.add_cmd_line)
G.add_cmd_line = xstrdup(cmdstr);
G.add_cmd_line[len-1] = '\0';
return;
}
2003-04-08 17:26:11 +05:30
/* Loop parsing all commands in this line. */
while (*cmdstr) {
/* Skip leading whitespace and semicolons */
cmdstr += strspn(cmdstr, semicolon_whitespace);
/* If no more commands, exit. */
if (!*cmdstr) break;
/* if this is a comment, jump past it and keep going */
if (*cmdstr == '#') {
/* "#n" is the same as using -n on the command line */
if (cmdstr[1] == 'n')
G.be_quiet++;
cmdstr = strpbrk(cmdstr, "\n\r");
if (!cmdstr) break;
continue;
}
/* parse the command
* format is: [addr][,addr][!]cmd
* |----||-----||-|
* part1 part2 part3
*/
2003-04-08 17:26:11 +05:30
sed_cmd = xzalloc(sizeof(sed_cmd_t));
/* first part (if present) is an address: either a '$', a number or a /regex/ */
cmdstr += get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
sed_cmd->beg_line_orig = sed_cmd->beg_line;
/* second part (if present) will begin with a comma */
if (*cmdstr == ',') {
int idx;
cmdstr++;
if (*cmdstr == '+' && isdigit(cmdstr[1])) {
/* http://sed.sourceforge.net/sedfaq3.html#s3.3
* Under GNU sed 3.02+, ssed, and sed15+, <address2>
* may also be a notation of the form +num,
* indicating the next num lines after <address1> is
* matched.
* GNU sed 4.2.1 accepts even "+" (meaning "+0").
* We don't (we check for isdigit, see above), think
* about the "+-3" case.
*/
char *end;
/* code is smaller compared to using &cmdstr here: */
idx = strtol(cmdstr+1, &end, 10);
sed_cmd->end_line = -2 - idx;
cmdstr = end;
} else {
idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match);
cmdstr += idx;
idx--; /* if 0, trigger error check below */
}
if (idx < 0)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("no address after comma");
sed_cmd->end_line_orig = sed_cmd->end_line;
}
/* skip whitespace before the command */
2006-10-25 18:16:03 +05:30
cmdstr = skip_whitespace(cmdstr);
/* Check for inversion flag */
if (*cmdstr == '!') {
sed_cmd->invert = 1;
cmdstr++;
/* skip whitespace before the command */
2006-10-25 18:16:03 +05:30
cmdstr = skip_whitespace(cmdstr);
}
/* last part (mandatory) will be a command */
if (!*cmdstr)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("missing command");
sed_cmd->cmd = *cmdstr++;
cmdstr = parse_cmd_args(sed_cmd, cmdstr);
/* cmdstr now points past args.
* GNU sed requires a separator, if there are more commands,
* else it complains "char N: extra characters after command".
* Example: "sed 'p;d'". We also allow "sed 'pd'".
*/
/* Add the command to the command array */
*G.sed_cmd_tail = sed_cmd;
G.sed_cmd_tail = &sed_cmd->next;
}
/* If we glued multiple lines together, free the memory. */
free(G.add_cmd_line);
G.add_cmd_line = NULL;
}
/* Append to a string, reallocating memory as necessary. */
2003-04-08 17:26:11 +05:30
#define PIPE_GROW 64
static void pipe_putc(char c)
{
if (G.pipeline.idx == G.pipeline.len) {
G.pipeline.buf = xrealloc(G.pipeline.buf,
G.pipeline.len + PIPE_GROW);
G.pipeline.len += PIPE_GROW;
}
G.pipeline.buf[G.pipeline.idx++] = c;
}
static void do_subst_w_backrefs(char *line, char *replace)
{
int i, j;
/* go through the replacement string */
for (i = 0; replace[i]; i++) {
/* if we find a backreference (\1, \2, etc.) print the backref'ed text */
if (replace[i] == '\\') {
unsigned backref = replace[++i] - '0';
if (backref <= 9) {
/* print out the text held in G.regmatch[backref] */
if (G.regmatch[backref].rm_so != -1) {
j = G.regmatch[backref].rm_so;
while (j < G.regmatch[backref].rm_eo)
pipe_putc(line[j++]);
}
continue;
}
/* I _think_ it is impossible to get '\' to be
* the last char in replace string. Thus we don't check
* for replace[i] == NUL. (counterexample anyone?) */
/* if we find a backslash escaped character, print the character */
pipe_putc(replace[i]);
continue;
}
/* if we find an unescaped '&' print out the whole matched text. */
if (replace[i] == '&') {
j = G.regmatch[0].rm_so;
while (j < G.regmatch[0].rm_eo)
pipe_putc(line[j++]);
continue;
}
/* Otherwise just output the character. */
pipe_putc(replace[i]);
}
}
static int do_subst_command(sed_cmd_t *sed_cmd, char **line_p)
{
char *line = *line_p;
unsigned match_count = 0;
bool altered = 0;
bool prev_match_empty = 1;
bool tried_at_eol = 0;
regex_t *current_regex;
current_regex = sed_cmd->sub_match;
/* Handle empty regex. */
if (!current_regex) {
current_regex = G.previous_regex_ptr;
if (!current_regex)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("no previous regexp");
}
G.previous_regex_ptr = current_regex;
/* Find the first match */
dbg("matching '%s'", line);
if (REG_NOMATCH == regexec(current_regex, line, 10, G.regmatch, 0)) {
dbg("no match");
return 0;
}
dbg("match");
/* Initialize temporary output buffer. */
G.pipeline.buf = xmalloc(PIPE_GROW);
G.pipeline.len = PIPE_GROW;
G.pipeline.idx = 0;
/* Now loop through, substituting for matches */
do {
int start = G.regmatch[0].rm_so;
int end = G.regmatch[0].rm_eo;
int i;
match_count++;
/* If we aren't interested in this match, output old line to
* end of match and continue */
if (sed_cmd->which_match
&& (sed_cmd->which_match != match_count)
) {
for (i = 0; i < end; i++)
pipe_putc(*line++);
/* Null match? Print one more char */
if (start == end && *line)
pipe_putc(*line++);
goto next;
}
/* Print everything before the match */
for (i = 0; i < start; i++)
pipe_putc(line[i]);
/* Then print the substitution string,
* unless we just matched empty string after non-empty one.
* Example: string "cccd", pattern "c*", repl "R":
* result is "RdR", not "RRdR": first match "ccc",
* second is "" before "d", third is "" after "d".
* Second match is NOT replaced!
*/
if (prev_match_empty || start != 0 || start != end) {
//dbg("%d %d %d", prev_match_empty, start, end);
dbg("inserting replacement at %d in '%s'", start, line);
do_subst_w_backrefs(line, sed_cmd->string);
/* Flag that something has changed */
altered = 1;
} else {
dbg("NOT inserting replacement at %d in '%s'", start, line);
}
/* If matched string is empty (f.e. "c*" pattern),
* copy verbatim one char after it before attempting more matches
*/
prev_match_empty = (start == end);
if (prev_match_empty) {
if (!line[end]) {
tried_at_eol = 1;
} else {
pipe_putc(line[end]);
end++;
}
}
/* Advance past the match */
dbg("line += %d", end);
line += end;
/* if we're not doing this globally, get out now */
if (sed_cmd->which_match != 0)
break;
next:
/* Exit if we are at EOL and already tried matching at it */
if (*line == '\0') {
if (tried_at_eol)
break;
tried_at_eol = 1;
}
//maybe (end ? REG_NOTBOL : 0) instead of unconditional REG_NOTBOL?
} while (regexec(current_regex, line, 10, G.regmatch, REG_NOTBOL) != REG_NOMATCH);
/* Copy rest of string into output pipeline */
while (1) {
char c = *line++;
pipe_putc(c);
if (c == '\0')
break;
}
free(*line_p);
*line_p = G.pipeline.buf;
return altered;
}
/* Set command pointer to point to this label. (Does not handle null label.) */
static sed_cmd_t *branch_to(char *label)
{
sed_cmd_t *sed_cmd;
2003-04-11 22:40:23 +05:30
for (sed_cmd = G.sed_cmd_head; sed_cmd; sed_cmd = sed_cmd->next) {
if (sed_cmd->cmd == ':'
&& sed_cmd->string
&& strcmp(sed_cmd->string, label) == 0
) {
return sed_cmd;
}
}
bb_error_msg_and_die("can't find label for jump to '%s'", label);
}
static void append(char *s)
{
llist_add_to_end(&G.append_head, s);
}
/* Output line of text. */
/* Note:
* The tricks with NO_EOL_CHAR and last_puts_char are there to emulate gnu sed.
* Without them, we had this:
* echo -n thingy >z1
* echo -n again >z2
* >znull
* sed "s/i/z/" z1 z2 znull | hexdump -vC
* output:
* gnu sed 4.1.5:
* 00000000 74 68 7a 6e 67 79 0a 61 67 61 7a 6e |thzngy.agazn|
* bbox:
* 00000000 74 68 7a 6e 67 79 61 67 61 7a 6e |thzngyagazn|
*/
enum {
NO_EOL_CHAR = 1,
LAST_IS_NUL = 2,
};
static void puts_maybe_newline(char *s, FILE *file, char *last_puts_char, char last_gets_char)
{
char lpc = *last_puts_char;
/* Need to insert a '\n' between two files because first file's
* last line wasn't terminated? */
if (lpc != '\n' && lpc != '\0') {
fputc('\n', file);
lpc = '\n';
}
fputs(s, file);
/* 'x' - just something which is not '\n', '\0' or NO_EOL_CHAR */
if (s[0])
lpc = 'x';
/* had trailing '\0' and it was last char of file? */
if (last_gets_char == LAST_IS_NUL) {
fputc('\0', file);
lpc = 'x'; /* */
} else
/* had trailing '\n' or '\0'? */
if (last_gets_char != NO_EOL_CHAR) {
fputc(last_gets_char, file);
lpc = last_gets_char;
}
if (ferror(file)) {
xfunc_error_retval = 4; /* It's what gnu sed exits with... */
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die(bb_msg_write_error);
}
*last_puts_char = lpc;
}
static void flush_append(char *last_puts_char)
{
char *data;
/* Output appended lines. */
while ((data = (char *)llist_pop(&G.append_head)) != NULL) {
/* Append command does not respect "nonterminated-ness"
* of last line. Try this:
* $ echo -n "woot" | sed -e '/woot/a woo' -
* woot
* woo
* (both lines are terminated with \n)
* Therefore we do not propagate "last_gets_char" here,
* pass '\n' instead:
*/
puts_maybe_newline(data, G.nonstdout, last_puts_char, '\n');
free(data);
}
}
/* Get next line of input from G.input_file_list, flushing append buffer and
* noting if we ran out of files without a newline on the last line we read.
*/
static char *get_next_line(char *gets_char, char *last_puts_char)
{
char *temp = NULL;
size_t len;
char gc;
2006-12-02 23:28:10 +05:30
flush_append(last_puts_char);
/* will be returned if last line in the file
* doesn't end with either '\n' or '\0' */
gc = NO_EOL_CHAR;
for (; G.current_input_file <= G.last_input_file; G.current_input_file++) {
FILE *fp = G.current_fp;
if (!fp) {
const char *path = G.input_file_list[G.current_input_file];
fp = stdin;
if (path != bb_msg_standard_input) {
fp = fopen_or_warn(path, "r");
if (!fp) {
G.exitcode = EXIT_FAILURE;
continue;
}
}
G.current_fp = fp;
}
/* Read line up to a newline or NUL byte, inclusive,
* return malloc'ed char[]. length of the chunk read
* is stored in len. NULL if EOF/error */
temp = bb_get_chunk_from_file(fp, &len);
if (temp) {
2006-12-02 23:28:10 +05:30
/* len > 0 here, it's ok to do temp[len-1] */
char c = temp[len-1];
if (c == '\n' || c == '\0') {
temp[len-1] = '\0';
gc = c;
if (c == '\0') {
int ch = fgetc(fp);
if (ch != EOF)
ungetc(ch, fp);
else
gc = LAST_IS_NUL;
}
2006-12-02 23:28:10 +05:30
}
/* else we put NO_EOL_CHAR into *gets_char */
break;
/* NB: I had the idea of peeking next file(s) and returning
* NO_EOL_CHAR only if it is the *last* non-empty
* input file. But there is a case where this won't work:
* file1: "a woo\nb woo"
* file2: "c no\nd no"
* sed -ne 's/woo/bang/p' input1 input2 => "a bang\nb bang"
* (note: *no* newline after "b bang"!) */
2006-12-02 23:28:10 +05:30
}
/* Close this file and advance to next one */
fclose_if_not_stdin(fp);
G.current_fp = NULL;
}
*gets_char = gc;
return temp;
}
#define sed_puts(s, n) (puts_maybe_newline(s, G.nonstdout, &last_puts_char, n))
static int beg_match(sed_cmd_t *sed_cmd, const char *pattern_space)
{
int retval = sed_cmd->beg_match && !regexec(sed_cmd->beg_match, pattern_space, 0, NULL, 0);
if (retval)
G.previous_regex_ptr = sed_cmd->beg_match;
return retval;
}
/* Process all the lines in all the files */
static void process_files(void)
{
char *pattern_space, *next_line;
int linenum = 0;
char last_puts_char = '\n';
char last_gets_char, next_gets_char;
sed_cmd_t *sed_cmd;
int substituted;
/* Prime the pump */
next_line = get_next_line(&next_gets_char, &last_puts_char);
/* Go through every line in each file */
again:
substituted = 0;
2003-04-12 21:40:42 +05:30
2006-12-10 07:39:12 +05:30
/* Advance to next line. Stop if out of lines. */
pattern_space = next_line;
if (!pattern_space)
return;
last_gets_char = next_gets_char;
2006-12-10 07:39:12 +05:30
/* Read one line in advance so we can act on the last line,
* the '$' address */
next_line = get_next_line(&next_gets_char, &last_puts_char);
2006-12-10 07:39:12 +05:30
linenum++;
/* For every line, go through all the commands */
restart:
for (sed_cmd = G.sed_cmd_head; sed_cmd; sed_cmd = sed_cmd->next) {
2006-12-10 07:39:12 +05:30
int old_matched, matched;
old_matched = sed_cmd->in_match;
if (!old_matched)
sed_cmd->end_line = sed_cmd->end_line_orig;
2006-12-10 07:39:12 +05:30
/* Determine if this command matches this line: */
dbg("match1:%d", sed_cmd->in_match);
dbg("match2:%d", (!sed_cmd->beg_line && !sed_cmd->end_line
&& !sed_cmd->beg_match && !sed_cmd->end_match));
dbg("match3:%d", (sed_cmd->beg_line > 0
&& (sed_cmd->end_line || sed_cmd->end_match
? (sed_cmd->beg_line <= linenum)
: (sed_cmd->beg_line == linenum)
)
));
dbg("match4:%d", (beg_match(sed_cmd, pattern_space)));
dbg("match5:%d", (sed_cmd->beg_line == -1 && next_line == NULL));
/* Are we continuing a previous multi-line match? */
2006-12-10 07:39:12 +05:30
sed_cmd->in_match = sed_cmd->in_match
/* Or is no range necessary? */
|| (!sed_cmd->beg_line && !sed_cmd->end_line
&& !sed_cmd->beg_match && !sed_cmd->end_match)
/* Or did we match the start of a numerical range? */
|| (sed_cmd->beg_line > 0
&& (sed_cmd->end_line || sed_cmd->end_match
/* note: even if end is numeric and is < linenum too,
* GNU sed matches! We match too, therefore we don't
* check here that linenum <= end.
* Example:
* printf '1\n2\n3\n4\n' | sed -n '1{N;N;d};1p;2,3p;3p;4p'
* first three input lines are deleted;
* 4th line is matched and printed
* by "2,3" (!) and by "4" ranges
*/
? (sed_cmd->beg_line <= linenum) /* N,end */
: (sed_cmd->beg_line == linenum) /* N */
)
)
2006-12-10 07:39:12 +05:30
/* Or does this line match our begin address regex? */
|| (beg_match(sed_cmd, pattern_space))
2006-12-10 07:39:12 +05:30
/* Or did we match last line of input? */
|| (sed_cmd->beg_line == -1 && next_line == NULL);
/* Snapshot the value */
2006-12-10 07:39:12 +05:30
matched = sed_cmd->in_match;
dbg("cmd:'%c' matched:%d beg_line:%d end_line:%d linenum:%d",
sed_cmd->cmd, matched, sed_cmd->beg_line, sed_cmd->end_line, linenum);
2006-12-10 07:39:12 +05:30
/* Is this line the end of the current match? */
2006-12-10 07:39:12 +05:30
if (matched) {
if (sed_cmd->end_line <= -2) {
/* address2 is +N, i.e. N lines from beg_line */
sed_cmd->end_line = linenum + (-sed_cmd->end_line - 2);
}
/* once matched, "n,xxx" range is dead, disabling it */
if (sed_cmd->beg_line > 0) {
sed_cmd->beg_line = -2;
}
dbg("end1:%d", sed_cmd->end_line ? sed_cmd->end_line == -1
? !next_line : (sed_cmd->end_line <= linenum)
: !sed_cmd->end_match);
dbg("end2:%d", sed_cmd->end_match && old_matched
&& !regexec(sed_cmd->end_match,pattern_space, 0, NULL, 0));
sed_cmd->in_match = !(
2006-12-10 07:39:12 +05:30
/* has the ending line come, or is this a single address command? */
(sed_cmd->end_line
? sed_cmd->end_line == -1
? !next_line
2006-12-10 07:39:12 +05:30
: (sed_cmd->end_line <= linenum)
: !sed_cmd->end_match
)
2006-12-10 07:39:12 +05:30
/* or does this line matches our last address regex */
|| (sed_cmd->end_match && old_matched
2006-12-10 07:39:12 +05:30
&& (regexec(sed_cmd->end_match,
pattern_space, 0, NULL, 0) == 0)
)
);
2006-12-10 07:39:12 +05:30
}
/* Skip blocks of commands we didn't match */
2006-12-10 07:39:12 +05:30
if (sed_cmd->cmd == '{') {
if (sed_cmd->invert ? matched : !matched) {
unsigned nest_cnt = 0;
while (1) {
if (sed_cmd->cmd == '{')
nest_cnt++;
if (sed_cmd->cmd == '}') {
nest_cnt--;
if (nest_cnt == 0)
break;
}
2006-12-10 07:39:12 +05:30
sed_cmd = sed_cmd->next;
if (!sed_cmd)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("unterminated {");
}
}
2006-12-10 07:39:12 +05:30
continue;
}
2006-12-10 07:39:12 +05:30
/* Okay, so did this line match? */
if (sed_cmd->invert ? matched : !matched)
continue; /* no */
/* Update last used regex in case a blank substitute BRE is found */
if (sed_cmd->beg_match) {
G.previous_regex_ptr = sed_cmd->beg_match;
}
/* actual sedding */
dbg("pattern_space:'%s' next_line:'%s' cmd:%c",
pattern_space, next_line, sed_cmd->cmd);
switch (sed_cmd->cmd) {
2006-12-10 07:39:12 +05:30
/* Print line number */
case '=':
fprintf(G.nonstdout, "%d\n", linenum);
break;
/* Write the current pattern space up to the first newline */
case 'P':
{
char *tmp = strchr(pattern_space, '\n');
if (tmp) {
*tmp = '\0';
/* TODO: explain why '\n' below */
sed_puts(pattern_space, '\n');
*tmp = '\n';
2006-12-10 07:39:12 +05:30
break;
}
/* Fall Through */
}
/* Write the current pattern space to output */
case 'p':
/* NB: we print this _before_ the last line
* (of current file) is printed. Even if
* that line is nonterminated, we print
* '\n' here (gnu sed does the same) */
sed_puts(pattern_space, '\n');
break;
/* Delete up through first newline */
case 'D':
{
char *tmp = strchr(pattern_space, '\n');
if (tmp) {
overlapping_strcpy(pattern_space, tmp + 1);
goto restart;
}
}
/* discard this line. */
case 'd':
goto discard_line;
/* Substitute with regex */
case 's':
if (!do_subst_command(sed_cmd, &pattern_space))
2006-12-10 07:39:12 +05:30
break;
dbg("do_subst_command succeeded:'%s'", pattern_space);
substituted |= 1;
2003-04-08 17:26:11 +05:30
/* handle p option */
if (sed_cmd->sub_p)
sed_puts(pattern_space, last_gets_char);
/* handle w option */
if (sed_cmd->sw_file)
puts_maybe_newline(
pattern_space, sed_cmd->sw_file,
&sed_cmd->sw_last_char, last_gets_char);
break;
2006-12-10 07:39:12 +05:30
/* Append line to linked list to be printed later */
case 'a':
append(xstrdup(sed_cmd->string));
break;
2006-12-10 07:39:12 +05:30
/* Insert text before this line */
case 'i':
sed_puts(sed_cmd->string, '\n');
break;
2006-12-10 07:39:12 +05:30
/* Cut and paste text (replace) */
case 'c':
/* Only triggers on last line of a matching range. */
if (!sed_cmd->in_match)
sed_puts(sed_cmd->string, '\n');
goto discard_line;
2003-04-11 22:40:23 +05:30
/* Read file, append contents to output */
case 'r':
{
FILE *rfile;
rfile = fopen_for_read(sed_cmd->string);
if (rfile) {
char *line;
while ((line = xmalloc_fgetline(rfile))
!= NULL)
append(line);
fclose(rfile);
2006-12-10 07:39:12 +05:30
}
2003-04-09 21:22:32 +05:30
break;
}
/* Write pattern space to file. */
case 'w':
puts_maybe_newline(
pattern_space, sed_cmd->sw_file,
&sed_cmd->sw_last_char, last_gets_char);
break;
2006-12-10 07:39:12 +05:30
/* Read next line from input */
case 'n':
if (!G.be_quiet)
sed_puts(pattern_space, last_gets_char);
if (next_line == NULL) {
/* If no next line, jump to end of script and exit. */
goto discard_line;
2006-12-10 07:39:12 +05:30
}
free(pattern_space);
pattern_space = next_line;
last_gets_char = next_gets_char;
next_line = get_next_line(&next_gets_char, &last_puts_char);
substituted = 0;
linenum++;
break;
2003-04-08 17:26:11 +05:30
/* Quit. End of script, end of input. */
case 'q':
/* Exit the outer while loop */
free(next_line);
next_line = NULL;
goto discard_commands;
/* Append the next line to the current line */
case 'N':
{
int len;
/* If no next line, jump to end of script and exit. */
/* http://www.gnu.org/software/sed/manual/sed.html:
* "Most versions of sed exit without printing anything
* when the N command is issued on the last line of
* a file. GNU sed prints pattern space before exiting
* unless of course the -n command switch has been
* specified. This choice is by design."
*/
if (next_line == NULL) {
//goto discard_line;
goto discard_commands; /* GNU behavior */
2006-12-10 07:39:12 +05:30
}
/* Append next_line, read new next_line. */
len = strlen(pattern_space);
pattern_space = xrealloc(pattern_space, len + strlen(next_line) + 2);
pattern_space[len] = '\n';
strcpy(pattern_space + len+1, next_line);
last_gets_char = next_gets_char;
next_line = get_next_line(&next_gets_char, &last_puts_char);
linenum++;
break;
}
/* Test/branch if substitution occurred */
case 't':
if (!substituted) break;
substituted = 0;
/* Fall through */
/* Test/branch if substitution didn't occur */
case 'T':
if (substituted) break;
/* Fall through */
/* Branch to label */
case 'b':
if (!sed_cmd->string) goto discard_commands;
else sed_cmd = branch_to(sed_cmd->string);
break;
/* Transliterate characters */
case 'y':
{
int i, j;
for (i = 0; pattern_space[i]; i++) {
for (j = 0; sed_cmd->string[j]; j += 2) {
if (pattern_space[i] == sed_cmd->string[j]) {
pattern_space[i] = sed_cmd->string[j + 1];
break;
}
}
}
break;
}
case 'g': /* Replace pattern space with hold space */
free(pattern_space);
pattern_space = xstrdup(G.hold_space ? G.hold_space : "");
break;
case 'G': /* Append newline and hold space to pattern space */
{
int pattern_space_size = 2;
int hold_space_size = 0;
if (pattern_space)
pattern_space_size += strlen(pattern_space);
if (G.hold_space)
hold_space_size = strlen(G.hold_space);
pattern_space = xrealloc(pattern_space,
pattern_space_size + hold_space_size);
if (pattern_space_size == 2)
pattern_space[0] = 0;
strcat(pattern_space, "\n");
if (G.hold_space)
strcat(pattern_space, G.hold_space);
last_gets_char = '\n';
break;
}
case 'h': /* Replace hold space with pattern space */
free(G.hold_space);
G.hold_space = xstrdup(pattern_space);
break;
case 'H': /* Append newline and pattern space to hold space */
{
int hold_space_size = 2;
int pattern_space_size = 0;
if (G.hold_space)
hold_space_size += strlen(G.hold_space);
if (pattern_space)
pattern_space_size = strlen(pattern_space);
G.hold_space = xrealloc(G.hold_space,
hold_space_size + pattern_space_size);
if (hold_space_size == 2)
*G.hold_space = 0;
strcat(G.hold_space, "\n");
if (pattern_space)
strcat(G.hold_space, pattern_space);
break;
}
case 'x': /* Exchange hold and pattern space */
{
char *tmp = pattern_space;
pattern_space = G.hold_space ? G.hold_space : xzalloc(1);
last_gets_char = '\n';
G.hold_space = tmp;
break;
}
} /* switch */
} /* for each cmd */
2006-12-10 07:39:12 +05:30
/*
* Exit point from sedding...
2006-12-10 07:39:12 +05:30
*/
discard_commands:
2006-12-10 07:39:12 +05:30
/* we will print the line unless we were told to be quiet ('-n')
or if the line was suppressed (ala 'd'elete) */
if (!G.be_quiet)
sed_puts(pattern_space, last_gets_char);
2006-12-10 07:39:12 +05:30
/* Delete and such jump here. */
discard_line:
flush_append(&last_puts_char /*,last_gets_char*/);
2006-12-10 07:39:12 +05:30
free(pattern_space);
goto again;
}
/* It is possible to have a command line argument with embedded
* newlines. This counts as multiple command lines.
* However, newline can be escaped: 's/e/z\<newline>z/'
* add_cmd() handles this.
*/
static void add_cmd_block(char *cmdstr)
{
char *sv, *eol;
cmdstr = sv = xstrdup(cmdstr);
do {
eol = strchr(cmdstr, '\n');
if (eol)
*eol = '\0';
add_cmd(cmdstr);
cmdstr = eol + 1;
} while (eol);
free(sv);
}
int sed_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
2008-07-05 14:48:54 +05:30
int sed_main(int argc UNUSED_PARAM, char **argv)
{
unsigned opt;
llist_t *opt_e, *opt_f;
char *opt_i;
#if ENABLE_LONG_OPTS
static const char sed_longopts[] ALIGN1 =
/* name has_arg short */
"in-place\0" Optional_argument "i"
"regexp-extended\0" No_argument "r"
"quiet\0" No_argument "n"
"silent\0" No_argument "n"
"expression\0" Required_argument "e"
"file\0" Required_argument "f";
#endif
INIT_G();
/* destroy command strings on exit */
if (ENABLE_FEATURE_CLEAN_UP) atexit(sed_free_and_close_stuff);
/* Lie to autoconf when it starts asking stupid questions. */
if (argv[1] && strcmp(argv[1], "--version") == 0) {
2006-12-10 07:39:12 +05:30
puts("This is not GNU sed version 4.0");
return 0;
}
/* do normal option parsing */
opt_e = opt_f = NULL;
opt_i = NULL;
/* -i must be first, to match OPT_in_place definition */
/* -E is a synonym of -r:
* GNU sed 4.2.1 mentions it in neither --help
* nor manpage, but does recognize it.
*/
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
opt = getopt32long(argv, "^"
"i::rEne:*f:*"
"\0" "nn"/*count -n*/,
sed_longopts,
getopt32: remove applet_long_options FEATURE_GETOPT_LONG made dependent on LONG_OPTS. The folloving options are removed, now LONG_OPTS enables long options for affected applets: FEATURE_ENV_LONG_OPTIONS FEATURE_EXPAND_LONG_OPTIONS FEATURE_UNEXPAND_LONG_OPTIONS FEATURE_MKDIR_LONG_OPTIONS FEATURE_MV_LONG_OPTIONS FEATURE_RMDIR_LONG_OPTIONS FEATURE_ADDGROUP_LONG_OPTIONS FEATURE_ADDUSER_LONG_OPTIONS FEATURE_HWCLOCK_LONG_OPTIONS FEATURE_NSENTER_LONG_OPTS FEATURE_CHCON_LONG_OPTIONS FEATURE_RUNCON_LONG_OPTIONS They either had a small number of long options, or their long options are essential. Example: upstream addgroup and adduser have ONLY longopts, we should probably go further and get rid of non-standard short options. To this end, make addgroup and adduser "select LONG_OPTS". We had this breakage caused by us even in our own package! #if ENABLE_LONG_OPTS || !ENABLE_ADDGROUP /* We try to use --gid, not -g, because "standard" addgroup * has no short option -g, it has only long --gid. */ argv[1] = (char*)"--gid"; #else /* Breaks if system in fact does NOT use busybox addgroup */ argv[1] = (char*)"-g"; #endif xargs: its lone longopt no longer depends on DESKTOP, only on LONG_OPTS. hwclock TODO: get rid of incompatible -t, -l aliases to --systz, --localtime Shorten help texts by omitting long option when short opt alternative exists. Reduction of size comes from the fact that store of an immediate (an address of longopts) to a fixed address (global variable) is a longer insn than pushing that immediate or passing it in a register. This effect is CPU-agnostic. function old new delta getopt32 1350 22 -1328 vgetopt32 - 1318 +1318 getopt32long - 24 +24 tftpd_main 562 567 +5 scan_recursive 376 380 +4 collect_cpu 545 546 +1 date_main 1096 1095 -1 hostname_main 262 259 -3 uname_main 259 255 -4 setpriv_main 362 358 -4 rmdir_main 191 187 -4 mv_main 562 558 -4 ipcalc_main 548 544 -4 ifenslave_main 641 637 -4 gzip_main 192 188 -4 gunzip_main 77 73 -4 fsfreeze_main 81 77 -4 flock_main 318 314 -4 deluser_main 337 333 -4 cp_main 374 370 -4 chown_main 175 171 -4 applet_long_options 4 - -4 xargs_main 894 889 -5 wget_main 2540 2535 -5 udhcpc_main 2767 2762 -5 touch_main 436 431 -5 tar_main 1014 1009 -5 start_stop_daemon_main 1033 1028 -5 sed_main 682 677 -5 script_main 1082 1077 -5 run_parts_main 330 325 -5 rtcwake_main 459 454 -5 od_main 2169 2164 -5 nl_main 201 196 -5 modprobe_main 773 768 -5 mkdir_main 160 155 -5 ls_main 568 563 -5 install_main 773 768 -5 hwclock_main 411 406 -5 getopt_main 622 617 -5 fstrim_main 256 251 -5 env_main 198 193 -5 dumpleases_main 635 630 -5 dpkg_main 3991 3986 -5 diff_main 1355 1350 -5 cryptpw_main 233 228 -5 cpio_main 593 588 -5 conspy_main 1135 1130 -5 chpasswd_main 313 308 -5 adduser_main 887 882 -5 addgroup_main 416 411 -5 ftpgetput_main 351 345 -6 get_terminal_width_height 242 234 -8 expand_main 690 680 -10 static.expand_longopts 18 - -18 static.unexpand_longopts 27 - -27 mkdir_longopts 28 - -28 env_longopts 30 - -30 static.ifenslave_longopts 34 - -34 mv_longopts 46 - -46 static.rmdir_longopts 48 - -48 packed_usage 31739 31687 -52 ------------------------------------------------------------------------------ (add/remove: 2/8 grow/shrink: 3/49 up/down: 1352/-1840) Total: -488 bytes text data bss dec hex filename 915681 485 6880 923046 e15a6 busybox_old 915428 485 6876 922789 e14a5 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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&opt_i, &opt_e, &opt_f,
&G.be_quiet); /* counter for -n */
//argc -= optind;
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argv += optind;
if (opt & OPT_in_place) { // -i
die_func = cleanup_outname;
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}
if (opt & (2|4))
G.regex_type |= REG_EXTENDED; // -r or -E
//if (opt & 8)
// G.be_quiet++; // -n (implemented with a counter instead)
while (opt_e) { // -e
add_cmd_block(llist_pop(&opt_e));
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}
while (opt_f) { // -f
char *line;
FILE *cmdfile;
cmdfile = xfopen_stdin(llist_pop(&opt_f));
while ((line = xmalloc_fgetline(cmdfile)) != NULL) {
add_cmd(line);
free(line);
}
fclose_if_not_stdin(cmdfile);
}
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/* if we didn't get a pattern from -e or -f, use argv[0] */
if (!(opt & 0x30)) {
if (!*argv)
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bb_show_usage();
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add_cmd_block(*argv++);
}
/* Flush any unfinished commands. */
add_cmd("");
/* By default, we write to stdout */
G.nonstdout = stdout;
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/* argv[0..(argc-1)] should be names of file to process. If no
* files were specified or '-' was specified, take input from stdin.
* Otherwise, we process all the files specified. */
G.input_file_list = argv;
if (!argv[0]) {
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if (opt & OPT_in_place)
bb_error_msg_and_die(bb_msg_requires_arg, "-i");
argv[0] = (char*)bb_msg_standard_input;
/* G.last_input_file = 0; - already is */
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} else {
goto start;
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for (; *argv; argv++) {
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struct stat statbuf;
int nonstdoutfd;
sed_cmd_t *sed_cmd;
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G.last_input_file++;
start:
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if (!(opt & OPT_in_place)) {
if (LONE_DASH(*argv)) {
*argv = (char*)bb_msg_standard_input;
process_files();
}
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continue;
}
/* -i: process each FILE separately: */
if (stat(*argv, &statbuf) != 0) {
bb_simple_perror_msg(*argv);
G.exitcode = EXIT_FAILURE;
G.current_input_file++;
continue;
}
G.outname = xasprintf("%sXXXXXX", *argv);
nonstdoutfd = xmkstemp(G.outname);
G.nonstdout = xfdopen_for_write(nonstdoutfd);
/* Set permissions/owner of output file */
/* chmod'ing AFTER chown would preserve suid/sgid bits,
* but GNU sed 4.2.1 does not preserve them either */
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fchmod(nonstdoutfd, statbuf.st_mode);
fchown(nonstdoutfd, statbuf.st_uid, statbuf.st_gid);
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process_files();
fclose(G.nonstdout);
G.nonstdout = stdout;
if (opt_i) {
char *backupname = xasprintf("%s%s", *argv, opt_i);
xrename(*argv, backupname);
free(backupname);
}
/* else unlink(*argv); - rename below does this */
xrename(G.outname, *argv); //TODO: rollback backup on error?
free(G.outname);
G.outname = NULL;
/* Fix disabled range matches and mangled ",+N" ranges */
for (sed_cmd = G.sed_cmd_head; sed_cmd; sed_cmd = sed_cmd->next) {
sed_cmd->beg_line = sed_cmd->beg_line_orig;
sed_cmd->end_line = sed_cmd->end_line_orig;
}
}
/* Here, to handle "sed 'cmds' nonexistent_file" case we did:
* if (G.current_input_file[G.current_input_file] == NULL)
* return G.exitcode;
* but it's not needed since process_files() works correctly
* in this case too. */
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}
process_files();
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return G.exitcode;
}