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hush: use ash's read builtin

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function                                             old     new   delta
shell_builtin_read                                     -    1000   +1000
set_local_var_from_halves                              -      24     +24
setvar2                                                -       7      +7
...
popstring                                            140     134      -6
ash_main                                            1375    1368      -7
setvar                                               184     174     -10
arith_set_local_var                                   36       -     -36
builtin_read                                        1096     185    -911
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 5/23 up/down: 1038/-1007)        Total: 31 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-01-12 23:29:57 +01:00
parent 045f4ad92c
commit 03dad22f8a
18 changed files with 124 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
shell/Kbuild
View File

@ -6,7 +6,7 @@
lib-y:=
lib-$(CONFIG_ASH) += ash.o ash_ptr_hack.o shell_common.o builtin_read.o
lib-$(CONFIG_HUSH) += hush.o match.o
lib-$(CONFIG_HUSH) += hush.o match.o shell_common.o builtin_read.o
lib-$(CONFIG_CTTYHACK) += cttyhack.o
lib-$(CONFIG_SH_MATH_SUPPORT) += math.o

14
shell/ash.c
View File

@ -1884,7 +1884,7 @@ getoptsreset(const char *value)
* Return of a legal variable name (a letter or underscore followed by zero or
* more letters, underscores, and digits).
*/
static char *
static char* FAST_FUNC
endofname(const char *name)
{
char *p;
@ -1991,7 +1991,7 @@ findvar(struct var **vpp, const char *name)
/*
* Find the value of a variable. Returns NULL if not set.
*/
static const char *
static const char* FAST_FUNC
lookupvar(const char *name)
{
struct var *v;
@ -2114,6 +2114,12 @@ setvar(const char *name, const char *val, int flags)
INT_ON;
}
static void FAST_FUNC
setvar2(const char *name, const char *val)
{
setvar(name, val, 0);
}
#if ENABLE_ASH_GETOPTS
/*
* Safe version of setvar, returns 1 on success 0 on failure.
@ -5304,7 +5310,7 @@ ash_arith(const char *s)
int errcode = 0;
math_hooks.lookupvar = lookupvar;
math_hooks.setvar = setvar;
math_hooks.setvar = setvar2;
math_hooks.endofname = endofname;
INT_OFF;
@ -12526,7 +12532,7 @@ readcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
}
}
r = builtin_read(setvar,
r = shell_builtin_read(setvar2,
argptr,
bltinlookup("IFS"), /* can be NULL */
read_flags,

10
shell/builtin_read.c
View File

@ -21,7 +21,7 @@
#include "builtin_read.h"
const char* FAST_FUNC
builtin_read(void (*setvar)(const char *name, const char *val, int flags),
shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val),
char **argv,
const char *ifs,
int read_flags,
@ -178,7 +178,7 @@ builtin_read(void (*setvar)(const char *name, const char *val, int flags),
if (argv[1] != NULL && is_ifs) {
buffer[bufpos] = '\0';
bufpos = 0;
setvar(*argv, buffer, 0);
setvar(*argv, buffer);
argv++;
/* can we skip one non-space ifs char? (2: yes) */
startword = isspace(c) ? 2 : 1;
@ -195,14 +195,14 @@ builtin_read(void (*setvar)(const char *name, const char *val, int flags),
continue;
buffer[bufpos + 1] = '\0';
/* Use the remainder as a value for the next variable */
setvar(*argv, buffer, 0);
setvar(*argv, buffer);
/* Set the rest to "" */
while (*++argv)
setvar(*argv, "", 0);
setvar(*argv, "");
} else {
/* Note: no $IFS removal */
buffer[bufpos] = '\0';
setvar("REPLY", buffer, 0);
setvar("REPLY", buffer);
}
ret:

2
shell/builtin_read.h
View File

@ -27,7 +27,7 @@ enum {
};
const char* FAST_FUNC
builtin_read(void (*setvar)(const char *name, const char *val, int flags),
shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val),
char **argv,
const char *ifs,
int read_flags,

59
shell/hush.c
View File

@ -84,6 +84,9 @@
#if ENABLE_HUSH_CASE
# include <fnmatch.h>
#endif
#include "shell_common.h"
#include "builtin_read.h"
#include "math.h"
#include "match.h"
#if ENABLE_HUSH_RANDOM_SUPPORT
@ -1307,7 +1310,7 @@ static struct variable *get_local_var(const char *name)
return NULL;
}
static const char *get_local_var_value(const char *name)
static const char* FAST_FUNC get_local_var_value(const char *name)
{
struct variable **pp = get_ptr_to_local_var(name);
if (pp)
@ -1510,7 +1513,7 @@ static void unset_vars(char **strings)
#if ENABLE_SH_MATH_SUPPORT
#define is_name(c) ((c) == '_' || isalpha((unsigned char)(c)))
#define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c)))
static char *endofname(const char *name)
static char* FAST_FUNC endofname(const char *name)
{
char *p;
@ -1524,11 +1527,10 @@ static char *endofname(const char *name)
return p;
}
static void arith_set_local_var(const char *name, const char *val, int flags)
static void FAST_FUNC set_local_var_from_halves(const char *name, const char *val)
{
/* arith code doesnt malloc space, so do it for it */
char *var = xasprintf("%s=%s", name, val);
set_local_var(var, flags, /*lvl:*/ 0, /*ro:*/ 0);
set_local_var(var, /*flags:*/ 0, /*lvl:*/ 0, /*ro:*/ 0);
}
#endif
@ -2538,7 +2540,7 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg, char
exp_str = expand_pseudo_dquoted(arg);
hooks.lookupvar = get_local_var_value;
hooks.setvar = arith_set_local_var;
hooks.setvar = set_local_var_from_halves;
hooks.endofname = endofname;
res = arith(exp_str ? exp_str : arg, &errcode, &hooks);
free(exp_str);
@ -6157,7 +6159,7 @@ static struct pipe *parse_stream(char **pstring,
G.ifs = get_local_var_value("IFS");
if (G.ifs == NULL)
G.ifs = " \t\n";
G.ifs = defifs;
reset:
#if ENABLE_HUSH_INTERACTIVE
@ -7727,24 +7729,37 @@ static int FAST_FUNC builtin_pwd(char **argv UNUSED_PARAM)
static int FAST_FUNC builtin_read(char **argv)
{
char *string;
const char *name = "REPLY";
const char *r;
char *opt_n = NULL;
char *opt_p = NULL;
char *opt_t = NULL;
char *opt_u = NULL;
int read_flags;
if (argv[1]) {
name = argv[1];
/* bash (3.2.33(1)) bug: "read 0abcd" will execute,
* and _after_ that_ it will complain */
if (!is_well_formed_var_name(name, '\0')) {
/* Mimic bash message */
bb_error_msg("read: '%s': not a valid identifier", name);
return 1;
}
/* "!": do not abort on errors.
* Option string must start with "sr" to match BUILTIN_READ_xxx
*/
read_flags = getopt32(argv, "!srn:p:t:u:", &opt_n, &opt_p, &opt_t, &opt_u);
if (read_flags == (uint32_t)-1)
return EXIT_FAILURE;
argv += optind;
r = shell_builtin_read(set_local_var_from_halves,
argv,
get_local_var_value("IFS"), /* can be NULL */
read_flags,
opt_n,
opt_p,
opt_t,
opt_u
);
if ((uintptr_t)r > 1) {
bb_error_msg("%s", r);
r = (char*)(uintptr_t)1;
}
//TODO: bash unbackslashes input, splits words and puts them in argv[i]
string = xmalloc_reads(STDIN_FILENO, xasprintf("%s=", name), NULL);
return set_local_var(string, /*exp:*/ 0, /*lvl:*/ 0, /*ro:*/ 0);
return (uintptr_t)r;
}
/* http://www.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#set

5
shell/hush_test/hush-read/read_REPLY.right Normal file
View File

@ -0,0 +1,5 @@
test 1: | abc1 def |
test 2: | \abc2 d\ef |
test 3: |abc3 def|
test 4: |\abc4 d\ef|
Done

5
shell/hush_test/hush-read/read_REPLY.tests Executable file
View File

@ -0,0 +1,5 @@
echo ' \abc1 d\ef ' | ( read ; echo "test 1: |$REPLY|" )
echo ' \abc2 d\ef ' | ( read -r ; echo "test 2: |$REPLY|" )
echo ' \abc3 d\ef ' | ( read REPLY; echo "test 3: |$REPLY|" )
echo ' \abc4 d\ef ' | ( read -r REPLY; echo "test 4: |$REPLY|" )
echo Done

10
shell/hush_test/hush-read/read_ifs.right Normal file
View File

@ -0,0 +1,10 @@
test 1: .a. .b. .c.
test 2: .a. .b. .c.
test 3: .a. .. .b,c.
test 4: .a. .. .b,c.
test 5: .a. .. .c.
test 6: .a. .. .c. .d.
test 7: .a. .. .b,c,d , ,.
test 8: .. .a. .b. .c.
test 9: .a. .b. .c. ..
test A: .. .a. .. .b. .c.

10
shell/hush_test/hush-read/read_ifs.tests Executable file
View File

@ -0,0 +1,10 @@
printf 'a\t\tb\tc\n' | ( IFS=$(printf "\t") read a b c; echo "test 1: .$a. .$b. .$c." )
printf 'a\t\tb\tc\n' | ( IFS=$(printf " \t") read a b c; echo "test 2: .$a. .$b. .$c." )
printf 'a,,b,c\n' | ( IFS="," read a b c; echo "test 3: .$a. .$b. .$c." )
printf 'a,,b,c\n' | ( IFS=" ," read a b c; echo "test 4: .$a. .$b. .$c." )
printf 'a ,, c\n' | ( IFS=" ," read a b c; echo "test 5: .$a. .$b. .$c." )
printf 'a ,, c d\n' | ( IFS=" ," read a b c d; echo "test 6: .$a. .$b. .$c. .$d." )
printf ' a,,b,c,d , ,\n' | ( IFS=" ," read a b c; echo "test 7: .$a. .$b. .$c." )
printf '\t,\ta\t,\tb\tc' | ( IFS=$(printf " \t,") read a b c d; echo "test 8: .$a. .$b. .$c. .$d." )
printf '\t\ta\t,\tb\tc' | ( IFS=$(printf " \t,") read a b c d; echo "test 9: .$a. .$b. .$c. .$d." )
printf '\t,\ta\t,,\tb\tc' | ( IFS=$(printf " \t,") read a b c d e; echo "test A: .$a. .$b. .$c. .$d. .$e." )

3
shell/hush_test/hush-read/read_n.right Normal file
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@ -0,0 +1,3 @@
test
tes
tes

3
shell/hush_test/hush-read/read_n.tests Executable file
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@ -0,0 +1,3 @@
echo 'test' | (read reply; echo "$reply")
echo 'test' | (read -n 3 reply; echo "$reply")
echo 'test' | (read -n3 reply; echo "$reply")

2
shell/hush_test/hush-read/read_r.right Normal file
View File

@ -0,0 +1,2 @@
testbest
test\

2
shell/hush_test/hush-read/read_r.tests Executable file
View File

@ -0,0 +1,2 @@
echo -e 'test\\\nbest' | (read reply; echo "$reply")
echo -e 'test\\\nbest' | (read -r reply; echo "$reply")

4
shell/hush_test/hush-read/read_t.right Normal file
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@ -0,0 +1,4 @@
><
><
>test<
>test<

10
shell/hush_test/hush-read/read_t.tests Executable file
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@ -0,0 +1,10 @@
# bash 3.2 outputs:
# ><
{ echo -n 'te'; sleep 2; echo 'st'; } | (read -t 1 reply; echo ">$reply<")
# ><
{ sleep 2; echo 'test'; } | (read -t 1 reply; echo ">$reply<")
# >test<
{ echo -n 'te'; sleep 1; echo 'st'; } | (read -t 2 reply; echo ">$reply<")
# >test<
{ sleep 1; echo 'test'; } | (read -t 2 reply; echo ">$reply<")

2
shell/match.h
View File

@ -5,6 +5,8 @@
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
//TODO! Why ash.c still uses internal version?!
typedef char *(*scan_t)(char *string, char *match, bool match_at_left);
char *scanleft(char *string, char *match, bool match_at_left);

19
shell/math.c
View File

@ -25,14 +25,6 @@
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
#include "libbb.h"
#include "math.h"
#define a_e_h_t arith_eval_hooks_t
#define lookupvar (math_hooks->lookupvar)
#define setvar (math_hooks->setvar)
#define endofname (math_hooks->endofname)
/* Copyright (c) 2001 Aaron Lehmann <aaronl@vitelus.com>
Permission is hereby granted, free of charge, to any person obtaining
@ -99,7 +91,6 @@
* whitespace chars should be considered. Look below the "#include"s for a
* precompiler test.
*/
/*
* Aug 26, 2001 Manuel Novoa III
*
@ -109,7 +100,6 @@
* modified slightly to take account of my changes to the code.
*
*/
/*
* (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
*
@ -126,6 +116,13 @@
* - protect $((num num)) as true zero expr (Manuel`s error)
* - always use special isspace(), see comment from bash ;-)
*/
#include "libbb.h"
#include "math.h"
#define a_e_h_t arith_eval_hooks_t
#define lookupvar (math_hooks->lookupvar)
#define setvar (math_hooks->setvar )
#define endofname (math_hooks->endofname)
#define arith_isspace(arithval) \
(arithval == ' ' || arithval == '\n' || arithval == '\t')
@ -420,7 +417,7 @@ arith_apply(operator op, v_n_t *numstack, v_n_t **numstackptr, a_e_h_t *math_hoo
}
/* save to shell variable */
sprintf(buf, arith_t_fmt, rez);
setvar(numptr_m1->var, buf, 0);
setvar(numptr_m1->var, buf);
/* after saving, make previous value for v++ or v-- */
if (op == TOK_POST_INC)
rez--;

7
shell/math.h
View File

@ -87,9 +87,10 @@ typedef long arith_t;
#define strto_arith_t strtoul
#endif
typedef const char *(*arith_var_lookup_t)(const char *name);
typedef void (*arith_var_set_t)(const char *name, const char *val, int flags);
typedef char *(*arith_var_endofname_t)(const char *name);
typedef const char* FAST_FUNC (*arith_var_lookup_t)(const char *name);
typedef void FAST_FUNC (*arith_var_set_t)(const char *name, const char *val);
typedef char* FAST_FUNC (*arith_var_endofname_t)(const char *name);
typedef struct arith_eval_hooks {
arith_var_lookup_t lookupvar;
arith_var_set_t setvar;