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busybox/coreutils/stat.c
Rob Landley b7128c6236 Cleanup patch by Bernhard Fischer, removing unnecessary includes of 
getopt.h, whitespace changes, typos, etc.
2005-09-11 01:05:30 +00:00

559 lines
15 KiB
C
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/*
* stat -- display file or file system status
*
* Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation.
* Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
*
* Written by Michael Meskes
* Taken from coreutils and turned into a busybox applet by Mike Frysinger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#include <sys/vfs.h>
#include <time.h>
#include <getopt.h> /* optind */
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/statvfs.h>
#include <string.h>
#include "busybox.h"
/* vars to control behavior */
#define OPT_TERSE 2
#define OPT_DEREFERNCE 4
static long flags;
static char const *file_type(struct stat const *st)
{
/* See POSIX 1003.1-2001 XCU Table 4-8 lines 17093-17107
* for some of these formats.
* To keep diagnostics grammatical in English, the
* returned string must start with a consonant.
*/
if (S_ISREG(st->st_mode)) return st->st_size == 0 ? "regular empty file" : "regular file";
if (S_ISDIR(st->st_mode)) return "directory";
if (S_ISBLK(st->st_mode)) return "block special file";
if (S_ISCHR(st->st_mode)) return "character special file";
if (S_ISFIFO(st->st_mode)) return "fifo";
if (S_ISLNK(st->st_mode)) return "symbolic link";
if (S_ISSOCK(st->st_mode)) return "socket";
if (S_TYPEISMQ(st)) return "message queue";
if (S_TYPEISSEM(st)) return "semaphore";
if (S_TYPEISSHM(st)) return "shared memory object";
#ifdef S_TYPEISTMO
if (S_TYPEISTMO(st)) return "typed memory object";
#endif
return "weird file";
}
static char const *human_time(time_t t)
{
static char *str;
str = ctime(&t);
str[strlen(str)-1] = '\0';
return str;
}
/* Return the type of the specified file system.
* Some systems have statfvs.f_basetype[FSTYPSZ]. (AIX, HP-UX, and Solaris)
* Others have statfs.f_fstypename[MFSNAMELEN]. (NetBSD 1.5.2)
* Still others have neither and have to get by with f_type (Linux).
*/
static char const *human_fstype(long f_type)
{
int i;
static struct types {
long type;
char *fs;
} humantypes[] = {
{ 0xADFF, "affs" },
{ 0x1Cd1, "devpts" },
{ 0x137D, "ext" },
{ 0xEF51, "ext2" },
{ 0xEF53, "ext2/ext3" },
{ 0x3153464a, "jfs" },
{ 0x58465342, "xfs" },
{ 0xF995E849, "hpfs" },
{ 0x9660, "isofs" },
{ 0x4000, "isofs" },
{ 0x4004, "isofs" },
{ 0x137F, "minix" },
{ 0x138F, "minix (30 char.)" },
{ 0x2468, "minix v2" },
{ 0x2478, "minix v2 (30 char.)" },
{ 0x4d44, "msdos" },
{ 0x4006, "fat" },
{ 0x564c, "novell" },
{ 0x6969, "nfs" },
{ 0x9fa0, "proc" },
{ 0x517B, "smb" },
{ 0x012FF7B4, "xenix" },
{ 0x012FF7B5, "sysv4" },
{ 0x012FF7B6, "sysv2" },
{ 0x012FF7B7, "coh" },
{ 0x00011954, "ufs" },
{ 0x012FD16D, "xia" },
{ 0x5346544e, "ntfs" },
{ 0x1021994, "tmpfs" },
{ 0x52654973, "reiserfs" },
{ 0x28cd3d45, "cramfs" },
{ 0x7275, "romfs" },
{ 0x858458f6, "romfs" },
{ 0x73717368, "squashfs" },
{ 0x62656572, "sysfs" },
{ 0, "UNKNOWN" },
{ 0, NULL }
};
for (i=0; humantypes[i].type; ++i)
if (humantypes[i].type == f_type)
return humantypes[i].fs;
return humantypes[i].fs;
}
#ifdef CONFIG_FEATURE_STAT_FORMAT
/* print statfs info */
static void print_statfs(char *pformat, size_t buf_len, char m,
char const *filename, void const *data)
{
struct statfs const *statfsbuf = data;
switch (m) {
case 'n':
strncat(pformat, "s", buf_len);
printf(pformat, filename);
break;
case 'i':
strncat(pformat, "Lx", buf_len);
printf(pformat, statfsbuf->f_fsid);
break;
case 'l':
strncat(pformat, "lu", buf_len);
printf(pformat, statfsbuf->f_namelen);
break;
case 't':
strncat(pformat, "lx", buf_len);
printf(pformat, (unsigned long int) (statfsbuf->f_type)); /* no equiv. */
break;
case 'T':
strncat(pformat, "s", buf_len);
printf(pformat, human_fstype(statfsbuf->f_type));
break;
case 'b':
strncat(pformat, "ld", buf_len);
printf(pformat, (intmax_t) (statfsbuf->f_blocks));
break;
case 'f':
strncat(pformat, "ld", buf_len);
printf(pformat, (intmax_t) (statfsbuf->f_bfree));
break;
case 'a':
strncat(pformat, "ld", buf_len);
printf(pformat, (intmax_t) (statfsbuf->f_bavail));
break;
case 'S':
case 's':
strncat(pformat, "lu", buf_len);
printf(pformat, (unsigned long int) (statfsbuf->f_bsize));
break;
case 'c':
strncat(pformat, "ld", buf_len);
printf(pformat, (intmax_t) (statfsbuf->f_files));
break;
case 'd':
strncat(pformat, "ld", buf_len);
printf(pformat, (intmax_t) (statfsbuf->f_ffree));
break;
default:
strncat(pformat, "c", buf_len);
printf(pformat, m);
break;
}
}
/* print stat info */
static void print_stat(char *pformat, size_t buf_len, char m,
char const *filename, void const *data)
{
#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
struct stat *statbuf = (struct stat *) data;
struct passwd *pw_ent;
struct group *gw_ent;
switch (m) {
case 'n':
strncat(pformat, "s", buf_len);
printf(pformat, filename);
break;
case 'N':
strncat(pformat, "s", buf_len);
if (S_ISLNK(statbuf->st_mode)) {
char *linkname = xreadlink(filename);
if (linkname == NULL) {
bb_perror_msg("cannot read symbolic link '%s'", filename);
return;
}
/*printf("\"%s\" -> \"%s\"", filename, linkname); */
printf(pformat, filename);
printf(" -> ");
printf(pformat, linkname);
} else {
printf(pformat, filename);
}
break;
case 'd':
strncat(pformat, "lu", buf_len);
printf(pformat, (uintmax_t) statbuf->st_dev);
break;
case 'D':
strncat(pformat, "lx", buf_len);
printf(pformat, (uintmax_t) statbuf->st_dev);
break;
case 'i':
strncat(pformat, "lu", buf_len);
printf(pformat, (uintmax_t) statbuf->st_ino);
break;
case 'a':
strncat(pformat, "lo", buf_len);
printf(pformat, (unsigned long int) (statbuf->st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)));
break;
case 'A':
strncat(pformat, "s", buf_len);
printf(pformat, bb_mode_string(statbuf->st_mode));
break;
case 'f':
strncat(pformat, "lx", buf_len);
printf(pformat, (unsigned long int) statbuf->st_mode);
break;
case 'F':
strncat(pformat, "s", buf_len);
printf(pformat, file_type(statbuf));
break;
case 'h':
strncat(pformat, "lu", buf_len);
printf(pformat, (unsigned long int) statbuf->st_nlink);
break;
case 'u':
strncat(pformat, "lu", buf_len);
printf(pformat, (unsigned long int) statbuf->st_uid);
break;
case 'U':
strncat(pformat, "s", buf_len);
setpwent();
pw_ent = getpwuid(statbuf->st_uid);
printf(pformat, (pw_ent != 0L) ? pw_ent->pw_name : "UNKNOWN");
break;
case 'g':
strncat(pformat, "lu", buf_len);
printf(pformat, (unsigned long int) statbuf->st_gid);
break;
case 'G':
strncat(pformat, "s", buf_len);
setgrent();
gw_ent = getgrgid(statbuf->st_gid);
printf(pformat, (gw_ent != 0L) ? gw_ent->gr_name : "UNKNOWN");
break;
case 't':
strncat(pformat, "lx", buf_len);
printf(pformat, (unsigned long int) major(statbuf->st_rdev));
break;
case 'T':
strncat(pformat, "lx", buf_len);
printf(pformat, (unsigned long int) minor(statbuf->st_rdev));
break;
case 's':
strncat(pformat, "lu", buf_len);
printf(pformat, (uintmax_t) (statbuf->st_size));
break;
case 'B':
strncat(pformat, "lu", buf_len);
printf(pformat, (unsigned long int) 512); //ST_NBLOCKSIZE
break;
case 'b':
strncat(pformat, "lu", buf_len);
printf(pformat, (uintmax_t) statbuf->st_blocks);
break;
case 'o':
strncat(pformat, "lu", buf_len);
printf(pformat, (unsigned long int) statbuf->st_blksize);
break;
case 'x':
strncat(pformat, "s", buf_len);
printf(pformat, human_time(statbuf->st_atime));
break;
case 'X':
strncat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu", buf_len);
printf(pformat, (unsigned long int) statbuf->st_atime);
break;
case 'y':
strncat(pformat, "s", buf_len);
printf(pformat, human_time(statbuf->st_mtime));
break;
case 'Y':
strncat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu", buf_len);
printf(pformat, (unsigned long int) statbuf->st_mtime);
break;
case 'z':
strncat(pformat, "s", buf_len);
printf(pformat, human_time(statbuf->st_ctime));
break;
case 'Z':
strncat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu", buf_len);
printf(pformat, (unsigned long int) statbuf->st_ctime);
break;
default:
strncat(pformat, "c", buf_len);
printf(pformat, m);
break;
}
}
static void print_it(char const *masterformat, char const *filename,
void (*print_func) (char *, size_t, char, char const *, void const *),
void const *data)
{
char *b;
/* create a working copy of the format string */
char *format = bb_xstrdup(masterformat);
/* Add 2 to accommodate our conversion of the stat `%s' format string
* to the printf `%llu' one. */
size_t n_alloc = strlen(format) + 2 + 1;
char *dest = xmalloc(n_alloc);
b = format;
while (b) {
char *p = strchr(b, '%');
if (p != NULL) {
size_t len;
*p++ = '\0';
fputs(b, stdout);
len = strspn(p, "#-+.I 0123456789");
dest[0] = '%';
memcpy(dest + 1, p, len);
dest[1 + len] = 0;
p += len;
b = p + 1;
switch (*p) {
case '\0':
b = NULL;
/* fall through */
case '%':
putchar('%');
break;
default:
print_func(dest, n_alloc, *p, filename, data);
break;
}
} else {
fputs(b, stdout);
b = NULL;
}
}
free(format);
free(dest);
}
#endif
/* Stat the file system and print what we find. */
static int do_statfs(char const *filename, char const *format)
{
struct statfs statfsbuf;
if (statfs(filename, &statfsbuf) != 0) {
bb_perror_msg("cannot read file system information for '%s'", filename);
return 0;
}
#ifdef CONFIG_FEATURE_STAT_FORMAT
if (format == NULL)
format = (flags & OPT_TERSE
? "%n %i %l %t %s %b %f %a %c %d\n"
: " File: \"%n\"\n"
" ID: %-8i Namelen: %-7l Type: %T\n"
"Block size: %-10s\n"
"Blocks: Total: %-10b Free: %-10f Available: %a\n"
"Inodes: Total: %-10c Free: %d\n");
print_it(format, filename, print_statfs, &statfsbuf);
#else
format = (flags & OPT_TERSE
? "%s %Lx %lu "
: " File: \"%s\"\n"
" ID: %-8Lx Namelen: %-7lu ");
printf(format,
filename,
statfsbuf.f_fsid,
statfsbuf.f_namelen);
if (flags & OPT_TERSE)
printf("%lx ", (unsigned long int) (statfsbuf.f_type));
else
printf("Type: %s\n", human_fstype(statfsbuf.f_type));
format = (flags & OPT_TERSE
? "%lu %ld %ld %ld %ld %ld\n"
: "Block size: %-10lu\n"
"Blocks: Total: %-10ld Free: %-10ld Available: %ld\n"
"Inodes: Total: %-10ld Free: %ld\n");
printf(format,
(unsigned long int) (statfsbuf.f_bsize),
(intmax_t) (statfsbuf.f_blocks),
(intmax_t) (statfsbuf.f_bfree),
(intmax_t) (statfsbuf.f_bavail),
(intmax_t) (statfsbuf.f_files),
(intmax_t) (statfsbuf.f_ffree));
#endif
return 1;
}
/* stat the file and print what we find */
static int do_stat(char const *filename, char const *format)
{
struct stat statbuf;
if ((flags & OPT_DEREFERNCE ? stat : lstat) (filename, &statbuf) != 0) {
bb_perror_msg("cannot stat '%s'", filename);
return 0;
}
#ifdef CONFIG_FEATURE_STAT_FORMAT
if (format == NULL) {
if (flags & OPT_TERSE) {
format = "%n %s %b %f %u %g %D %i %h %t %T %X %Y %Z %o\n";
} else {
if (S_ISBLK(statbuf.st_mode) || S_ISCHR(statbuf.st_mode)) {
format =
" File: \"%N\"\n"
" Size: %-10s\tBlocks: %-10b IO Block: %-6o %F\n"
"Device: %Dh/%dd\tInode: %-10i Links: %-5h"
" Device type: %t,%T\n"
"Access: (%04a/%10.10A) Uid: (%5u/%8U) Gid: (%5g/%8G)\n"
"Access: %x\n" "Modify: %y\n" "Change: %z\n";
} else {
format =
" File: \"%N\"\n"
" Size: %-10s\tBlocks: %-10b IO Block: %-6o %F\n"
"Device: %Dh/%dd\tInode: %-10i Links: %h\n"
"Access: (%04a/%10.10A) Uid: (%5u/%8U) Gid: (%5g/%8G)\n"
"Access: %x\n" "Modify: %y\n" "Change: %z\n";
}
}
}
print_it(format, filename, print_stat, &statbuf);
#else
if (flags & OPT_TERSE) {
printf("%s %lu %lu %lx %lu %lu %lx %lu %lu %lx %lx %lu %lu %lu %lu\n",
filename,
(uintmax_t) (statbuf.st_size),
(uintmax_t) statbuf.st_blocks,
(unsigned long int) statbuf.st_mode,
(unsigned long int) statbuf.st_uid,
(unsigned long int) statbuf.st_gid,
(uintmax_t) statbuf.st_dev,
(uintmax_t) statbuf.st_ino,
(unsigned long int) statbuf.st_nlink,
(unsigned long int) major(statbuf.st_rdev),
(unsigned long int) minor(statbuf.st_rdev),
(unsigned long int) statbuf.st_atime,
(unsigned long int) statbuf.st_mtime,
(unsigned long int) statbuf.st_ctime,
(unsigned long int) statbuf.st_blksize
);
} else {
char *linkname = NULL;
struct passwd *pw_ent;
struct group *gw_ent;
setgrent();
gw_ent = getgrgid(statbuf.st_gid);
setpwent();
pw_ent = getpwuid(statbuf.st_uid);
if (S_ISLNK(statbuf.st_mode))
linkname = xreadlink(filename);
if (linkname)
printf(" File: \"%s\" -> \"%s\"\n", filename, linkname);
else
printf(" File: \"%s\"\n", filename);
printf(" Size: %-10lu\tBlocks: %-10lu IO Block: %-6lu %s\n"
"Device: %lxh/%lud\tInode: %-10lu Links: %-5lu",
(uintmax_t) (statbuf.st_size),
(uintmax_t) statbuf.st_blocks,
(unsigned long int) statbuf.st_blksize,
file_type(&statbuf),
(uintmax_t) statbuf.st_dev,
(uintmax_t) statbuf.st_dev,
(uintmax_t) statbuf.st_ino,
(unsigned long int) statbuf.st_nlink);
if (S_ISBLK(statbuf.st_mode) || S_ISCHR(statbuf.st_mode))
printf(" Device type: %lx,%lx\n",
(unsigned long int) major(statbuf.st_rdev),
(unsigned long int) minor(statbuf.st_rdev));
else
putchar('\n');
printf("Access: (%04lo/%10.10s) Uid: (%5lu/%8s) Gid: (%5lu/%8s)\n"
"Access: %s\n" "Modify: %s\n" "Change: %s\n",
(unsigned long int) (statbuf.st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)),
bb_mode_string(statbuf.st_mode),
(unsigned long int) statbuf.st_uid,
(pw_ent != 0L) ? pw_ent->pw_name : "UNKNOWN",
(unsigned long int) statbuf.st_gid,
(gw_ent != 0L) ? gw_ent->gr_name : "UNKNOWN",
human_time(statbuf.st_atime),
human_time(statbuf.st_mtime),
human_time(statbuf.st_ctime));
}
#endif
return 1;
}
int stat_main(int argc, char **argv)
{
int i;
char *format = NULL;
int ok = 1;
int (*statfunc)(char const *, char const *) = do_stat;
flags = bb_getopt_ulflags(argc, argv, "ftL"
#ifdef CONFIG_FEATURE_STAT_FORMAT
"c:", &format
#endif
);
if (flags & 1) /* -f */
statfunc = do_statfs;
if (argc == optind) /* files */
bb_show_usage();
for (i = optind; i < argc; ++i)
ok &= statfunc(argv[i], format);
return (ok ? EXIT_SUCCESS : EXIT_FAILURE);
}
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