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c44c21060e47a50090206b23ff4de8fe13e8e521
busybox/coreutils/stat.c
Denis Vlasenko 5576136563 fixes revealed by randomconfig run
2007-10-16 22:53:05 +00:00

640 lines
19 KiB
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/* vi: set sw=4 ts=4: */
/*
* 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>
* Copyright (C) 2006 by Yoshinori Sato <ysato@users.sourceforge.jp>
*
* Written by Michael Meskes
* Taken from coreutils and turned into a busybox applet by Mike Frysinger
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
/* vars to control behavior */
#define OPT_FILESYS (1 << 0)
#define OPT_TERSE (1 << 1)
#define OPT_DEREFERENCE (1 << 2)
#define OPT_SELINUX (1 << 3)
static const char *file_type(const struct stat *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 const char *human_time(time_t t)
{
/* Old
static char *str;
str = ctime(&t);
str[strlen(str)-1] = '\0';
return str;
*/
/* coreutils 6.3 compat: */
/*static char buf[sizeof("YYYY-MM-DD HH:MM:SS.000000000")] ALIGN1;*/
#define buf bb_common_bufsiz1
strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S.000000000", localtime(&t));
return buf;
#undef buf
}
/* 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 const char *human_fstype(uint32_t f_type)
{
static const struct types {
uint32_t type;
const char *const 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" }
};
int i;
for (i = 0; humantypes[i].type; ++i)
if (humantypes[i].type == f_type)
break;
return humantypes[i].fs;
}
#if ENABLE_FEATURE_STAT_FORMAT
static void strcatc(char *str, char c)
{
int len = strlen(str);
str[len++] = c;
str[len] = '\0';
}
static void printfs(char *pformat, const char *msg)
{
strcatc(pformat, 's');
printf(pformat, msg);
}
/* print statfs info */
static void print_statfs(char *pformat, const char m,
const char *const filename, const void *data
USE_SELINUX(, security_context_t scontext))
{
const struct statfs *statfsbuf = data;
if (m == 'n') {
printfs(pformat, filename);
} else if (m == 'i') {
strcat(pformat, "Lx");
printf(pformat, statfsbuf->f_fsid);
} else if (m == 'l') {
strcat(pformat, "lu");
printf(pformat, statfsbuf->f_namelen);
} else if (m == 't') {
strcat(pformat, "lx");
printf(pformat, (unsigned long) (statfsbuf->f_type)); /* no equiv */
} else if (m == 'T') {
printfs(pformat, human_fstype(statfsbuf->f_type));
} else if (m == 'b') {
strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_blocks));
} else if (m == 'f') {
strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_bfree));
} else if (m == 'a') {
strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_bavail));
} else if (m == 's' || m == 'S') {
strcat(pformat, "lu");
printf(pformat, (unsigned long) (statfsbuf->f_bsize));
} else if (m == 'c') {
strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_files));
} else if (m == 'd') {
strcat(pformat, "jd");
printf(pformat, (intmax_t) (statfsbuf->f_ffree));
#if ENABLE_SELINUX
} else if (m == 'C' && (option_mask32 & OPT_SELINUX)) {
printfs(pformat, scontext);
#endif
} else {
strcatc(pformat, 'c');
printf(pformat, m);
}
}
/* print stat info */
static void print_stat(char *pformat, const char m,
const char *const filename, const void *data
USE_SELINUX(, security_context_t scontext))
{
#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
struct stat *statbuf = (struct stat *) data;
struct passwd *pw_ent;
struct group *gw_ent;
if (m == 'n') {
printfs(pformat, filename);
} else if (m == 'N') {
strcatc(pformat, 's');
if (S_ISLNK(statbuf->st_mode)) {
char *linkname = xmalloc_readlink_or_warn(filename);
if (linkname == NULL)
return;
/*printf("\"%s\" -> \"%s\"", filename, linkname); */
printf(pformat, filename);
printf(" -> ");
printf(pformat, linkname);
free(linkname);
} else {
printf(pformat, filename);
}
} else if (m == 'd') {
strcat(pformat, "ju");
printf(pformat, (uintmax_t) statbuf->st_dev);
} else if (m == 'D') {
strcat(pformat, "jx");
printf(pformat, (uintmax_t) statbuf->st_dev);
} else if (m == 'i') {
strcat(pformat, "ju");
printf(pformat, (uintmax_t) statbuf->st_ino);
} else if (m == 'a') {
strcat(pformat, "lo");
printf(pformat, (unsigned long) (statbuf->st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)));
} else if (m == 'A') {
printfs(pformat, bb_mode_string(statbuf->st_mode));
} else if (m == 'f') {
strcat(pformat, "lx");
printf(pformat, (unsigned long) statbuf->st_mode);
} else if (m == 'F') {
printfs(pformat, file_type(statbuf));
} else if (m == 'h') {
strcat(pformat, "lu");
printf(pformat, (unsigned long) statbuf->st_nlink);
} else if (m == 'u') {
strcat(pformat, "lu");
printf(pformat, (unsigned long) statbuf->st_uid);
} else if (m == 'U') {
setpwent();
pw_ent = getpwuid(statbuf->st_uid);
printfs(pformat, (pw_ent != 0L) ? pw_ent->pw_name : "UNKNOWN");
} else if (m == 'g') {
strcat(pformat, "lu");
printf(pformat, (unsigned long) statbuf->st_gid);
} else if (m == 'G') {
setgrent();
gw_ent = getgrgid(statbuf->st_gid);
printfs(pformat, (gw_ent != 0L) ? gw_ent->gr_name : "UNKNOWN");
} else if (m == 't') {
strcat(pformat, "lx");
printf(pformat, (unsigned long) major(statbuf->st_rdev));
} else if (m == 'T') {
strcat(pformat, "lx");
printf(pformat, (unsigned long) minor(statbuf->st_rdev));
} else if (m == 's') {
strcat(pformat, "ju");
printf(pformat, (uintmax_t) (statbuf->st_size));
} else if (m == 'B') {
strcat(pformat, "lu");
printf(pformat, (unsigned long) 512); //ST_NBLOCKSIZE
} else if (m == 'b') {
strcat(pformat, "ju");
printf(pformat, (uintmax_t) statbuf->st_blocks);
} else if (m == 'o') {
strcat(pformat, "lu");
printf(pformat, (unsigned long) statbuf->st_blksize);
} else if (m == 'x') {
printfs(pformat, human_time(statbuf->st_atime));
} else if (m == 'X') {
strcat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu");
printf(pformat, (unsigned long) statbuf->st_atime);
} else if (m == 'y') {
printfs(pformat, human_time(statbuf->st_mtime));
} else if (m == 'Y') {
strcat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu");
printf(pformat, (unsigned long) statbuf->st_mtime);
} else if (m == 'z') {
printfs(pformat, human_time(statbuf->st_ctime));
} else if (m == 'Z') {
strcat(pformat, TYPE_SIGNED(time_t) ? "ld" : "lu");
printf(pformat, (unsigned long) statbuf->st_ctime);
#if ENABLE_SELINUX
} else if (m == 'C' && (option_mask32 & OPT_SELINUX)) {
printfs(pformat, scontext);
#endif
} else {
strcatc(pformat, 'c');
printf(pformat, m);
}
}
static void print_it(const char *masterformat, const char *filename,
void (*print_func) (char*, char, const char*, const void* USE_SELINUX(, security_context_t scontext)),
const void *data
USE_SELINUX(, security_context_t scontext) )
{
/* Create a working copy of the format string */
char *format = xstrdup(masterformat);
/* Add 2 to accomodate our conversion of the stat '%s' format string
* to the printf '%llu' one. */
char *dest = xmalloc(strlen(format) + 2 + 1);
char *b;
b = format;
while (b) {
size_t len;
char *p = strchr(b, '%');
if (!p) {
/* coreutils 6.3 always prints <cr> at the end */
/*fputs(b, stdout);*/
puts(b);
break;
}
*p++ = '\0';
fputs(b, stdout);
/* dest = "%<modifiers>" */
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 '%':
bb_putchar('%');
break;
default:
/* Completes "%<modifiers>" with specifier and printfs */
print_func(dest, *p, filename, data USE_SELINUX(,scontext));
break;
}
}
free(format);
free(dest);
}
#endif
/* Stat the file system and print what we find. */
static bool do_statfs(const char *filename, const char *format)
{
struct statfs statfsbuf;
#if ENABLE_SELINUX
security_context_t scontext = NULL;
if (option_mask32 & OPT_SELINUX) {
if ((option_mask32 & OPT_DEREFERENCE
? lgetfilecon(filename, &scontext)
: getfilecon(filename, &scontext)
) < 0
) {
bb_perror_msg(filename);
return 0;
}
}
#endif
if (statfs(filename, &statfsbuf) != 0) {
bb_perror_msg("cannot read file system information for '%s'", filename);
return 0;
}
#if ENABLE_FEATURE_STAT_FORMAT
if (format == NULL) {
#if !ENABLE_SELINUX
format = (option_mask32 & 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");
#else
format = (option_mask32 & OPT_TERSE
? (option_mask32 & OPT_SELINUX ? "%n %i %l %t %s %b %f %a %c %d %C\n":
"%n %i %l %t %s %b %f %a %c %d\n")
: (option_mask32 & OPT_SELINUX ?
" 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"
" S_context: %C\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")
);
#endif /* SELINUX */
}
print_it(format, filename, print_statfs, &statfsbuf USE_SELINUX(, scontext));
#else /* FEATURE_STAT_FORMAT */
format = (option_mask32 & OPT_TERSE
? "%s %llx %lu "
: " File: \"%s\"\n"
" ID: %-8Lx Namelen: %-7lu ");
printf(format,
filename,
statfsbuf.f_fsid,
statfsbuf.f_namelen);
if (option_mask32 & OPT_TERSE)
printf("%lx ", (unsigned long) (statfsbuf.f_type));
else
printf("Type: %s\n", human_fstype(statfsbuf.f_type));
#if !ENABLE_SELINUX
format = (option_mask32 & OPT_TERSE
? "%lu %ld %ld %ld %ld %ld\n"
: "Block size: %-10lu\n"
"Blocks: Total: %-10jd Free: %-10jd Available: %jd\n"
"Inodes: Total: %-10jd Free: %jd\n");
printf(format,
(unsigned long) (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));
#else
format = (option_mask32 & OPT_TERSE
? (option_mask32 & OPT_SELINUX ? "%lu %ld %ld %ld %ld %ld %C\n":
"%lu %ld %ld %ld %ld %ld\n")
: (option_mask32 & OPT_SELINUX ?
"Block size: %-10lu\n"
"Blocks: Total: %-10jd Free: %-10jd Available: %jd\n"
"Inodes: Total: %-10jd Free: %jd"
"S_context: %C\n":
"Block size: %-10lu\n"
"Blocks: Total: %-10jd Free: %-10jd Available: %jd\n"
"Inodes: Total: %-10jd Free: %jd\n"));
printf(format,
(unsigned long) (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),
scontext);
if (scontext)
freecon(scontext);
#endif
#endif /* FEATURE_STAT_FORMAT */
return 1;
}
/* stat the file and print what we find */
static bool do_stat(const char *filename, const char *format)
{
struct stat statbuf;
#if ENABLE_SELINUX
security_context_t scontext = NULL;
if (option_mask32 & OPT_SELINUX) {
if ((option_mask32 & OPT_DEREFERENCE
? lgetfilecon(filename, &scontext)
: getfilecon(filename, &scontext)
) < 0
) {
bb_perror_msg(filename);
return 0;
}
}
#endif
if ((option_mask32 & OPT_DEREFERENCE ? stat : lstat) (filename, &statbuf) != 0) {
bb_perror_msg("cannot stat '%s'", filename);
return 0;
}
#if ENABLE_FEATURE_STAT_FORMAT
if (format == NULL) {
#if !ENABLE_SELINUX
if (option_mask32 & OPT_TERSE) {
format = "%n %s %b %f %u %g %D %i %h %t %T %X %Y %Z %o";
} 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";
}
}
#else
if (option_mask32 & OPT_TERSE) {
format = (option_mask32 & OPT_SELINUX ?
"%n %s %b %f %u %g %D %i %h %t %T %X %Y %Z %o %C\n":
"%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 = (option_mask32 & OPT_SELINUX ?
" 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"
" S_Context: %C\n"
"Access: %x\n" "Modify: %y\n" "Change: %z\n":
" 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 = (option_mask32 & OPT_SELINUX ?
" 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"
"S_Context: %C\n"
"Access: %x\n" "Modify: %y\n" "Change: %z\n":
" 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");
}
}
#endif
}
print_it(format, filename, print_stat, &statbuf USE_SELINUX(, scontext));
#else /* FEATURE_STAT_FORMAT */
if (option_mask32 & OPT_TERSE) {
printf("%s %ju %ju %lx %lu %lu %jx %ju %lu %lx %lx %lu %lu %lu %lu"
SKIP_SELINUX("\n"),
filename,
(uintmax_t) (statbuf.st_size),
(uintmax_t) statbuf.st_blocks,
(unsigned long) statbuf.st_mode,
(unsigned long) statbuf.st_uid,
(unsigned long) statbuf.st_gid,
(uintmax_t) statbuf.st_dev,
(uintmax_t) statbuf.st_ino,
(unsigned long) statbuf.st_nlink,
(unsigned long) major(statbuf.st_rdev),
(unsigned long) minor(statbuf.st_rdev),
(unsigned long) statbuf.st_atime,
(unsigned long) statbuf.st_mtime,
(unsigned long) statbuf.st_ctime,
(unsigned long) statbuf.st_blksize
);
#if ENABLE_SELINUX
if (option_mask32 & OPT_SELINUX)
printf(" %lc\n", *scontext);
else
bb_putchar('\n');
#endif
} 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 = xmalloc_readlink_or_warn(filename);
if (linkname)
printf(" File: \"%s\" -> \"%s\"\n", filename, linkname);
else
printf(" File: \"%s\"\n", filename);
printf(" Size: %-10ju\tBlocks: %-10ju IO Block: %-6lu %s\n"
"Device: %jxh/%jud\tInode: %-10ju Links: %-5lu",
(uintmax_t) (statbuf.st_size),
(uintmax_t) statbuf.st_blocks,
(unsigned long) statbuf.st_blksize,
file_type(&statbuf),
(uintmax_t) statbuf.st_dev,
(uintmax_t) statbuf.st_dev,
(uintmax_t) statbuf.st_ino,
(unsigned long) statbuf.st_nlink);
if (S_ISBLK(statbuf.st_mode) || S_ISCHR(statbuf.st_mode))
printf(" Device type: %lx,%lx\n",
(unsigned long) major(statbuf.st_rdev),
(unsigned long) minor(statbuf.st_rdev));
else
bb_putchar('\n');
printf("Access: (%04lo/%10.10s) Uid: (%5lu/%8s) Gid: (%5lu/%8s)\n",
(unsigned long) (statbuf.st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)),
bb_mode_string(statbuf.st_mode),
(unsigned long) statbuf.st_uid,
(pw_ent != 0L) ? pw_ent->pw_name : "UNKNOWN",
(unsigned long) statbuf.st_gid,
(gw_ent != 0L) ? gw_ent->gr_name : "UNKNOWN");
#if ENABLE_SELINUX
printf(" S_Context: %lc\n", *scontext);
#endif
printf("Access: %s\n" "Modify: %s\n" "Change: %s\n",
human_time(statbuf.st_atime),
human_time(statbuf.st_mtime),
human_time(statbuf.st_ctime));
}
#endif /* FEATURE_STAT_FORMAT */
return 1;
}
int stat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int stat_main(int argc, char **argv)
{
char *format = NULL;
int i;
int ok = 1;
bool (*statfunc)(const char *, const char *) = do_stat;
getopt32(argv, "ftL"
USE_SELINUX("Z")
USE_FEATURE_STAT_FORMAT("c:", &format)
);
if (option_mask32 & OPT_FILESYS) /* -f */
statfunc = do_statfs;
if (argc == optind) /* files */
bb_show_usage();
#if ENABLE_SELINUX
if (option_mask32 & OPT_SELINUX) {
selinux_or_die();
}
#endif /* ENABLE_SELINUX */
for (i = optind; i < argc; ++i)
ok &= statfunc(argv[i], format);
return (ok ? EXIT_SUCCESS : EXIT_FAILURE);
}
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