1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) tons of folks. Tracking down who wrote what
6 * isn't something I'm going to worry about... If you wrote something
7 * here, please feel free to acknowledge your work.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
24 * Permission has been granted to redistribute this code under the GPL.
39 #include <sys/ioctl.h>
40 #include <sys/utsname.h> /* for uname(2) */
43 #if defined (BB_CHMOD_CHOWN_CHGRP) \
44 || defined (BB_CP_MV) \
45 || defined (BB_FIND) \
46 || defined (BB_INSMOD) \
50 /* same conditions as recursive_action */
51 #define bb_need_name_too_long
53 #define bb_need_memory_exhausted
54 #define bb_need_full_version
55 #define BB_DECLARE_EXTERN
59 #include "pwd_grp/pwd.h"
60 #include "pwd_grp/grp.h"
62 /* for the _syscall() macros */
63 #include <sys/syscall.h>
64 #include <linux/unistd.h>
66 /* Busybox mount uses either /proc/filesystems or /dev/mtab to get the
67 * list of available filesystems used for the -t auto option */
68 #if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
70 const char mtab_file[] = "/etc/mtab";
72 # if defined BB_FEATURE_USE_DEVPS_PATCH
73 const char mtab_file[] = "/dev/mtab";
75 const char mtab_file[] = "/proc/mounts";
80 static struct BB_applet *applet_using;
82 extern void show_usage(void)
84 static const char no_help[] = "No help available.\n";
86 const char *usage_string = no_help;
89 if (applet_using->usage_index >= 0) {
90 usage_string = usage_messages;
91 for (i=applet_using->usage_index ; i>0 ; ) {
92 if (!*usage_string++) {
97 fprintf(stderr, "%s\n\nUsage: %s %s\n\n", full_version,
98 applet_using->name, usage_string);
103 static void verror_msg(const char *s, va_list p)
106 fprintf(stderr, "%s: ", applet_name);
107 vfprintf(stderr, s, p);
110 extern void error_msg(const char *s, ...)
120 extern void error_msg_and_die(const char *s, ...)
131 static void vperror_msg(const char *s, va_list p)
137 fprintf(stderr, "%s%s\n", s, strerror(err));
140 extern void perror_msg(const char *s, ...)
149 extern void perror_msg_and_die(const char *s, ...)
159 #if defined BB_INIT || defined BB_MKSWAP || defined BB_MOUNT || defined BB_NFSMOUNT
160 /* Returns kernel version encoded as major*65536 + minor*256 + patch,
161 * so, for example, to check if the kernel is greater than 2.2.11:
162 * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
164 extern int get_kernel_revision(void)
170 if (uname(&name) == -1) {
171 perror_msg("cannot get system information");
177 for (i=0 ; i<3 ; i++) {
178 r = r * 256 + atoi(strtok(s, "."));
187 #if defined BB_FREE || defined BB_INIT || defined BB_UNAME || defined BB_UPTIME
188 _syscall1(int, sysinfo, struct sysinfo *, info);
191 #if defined BB_MOUNT || defined BB_UMOUNT
194 static const int __NR_umount2 = 52;
197 /* Include our own version of <sys/mount.h>, since libc5 doesn't
198 * know about umount2 */
199 extern _syscall1(int, umount, const char *, special_file);
200 extern _syscall2(int, umount2, const char *, special_file, int, flags);
201 extern _syscall5(int, mount, const char *, special_file, const char *, dir,
202 const char *, fstype, unsigned long int, rwflag, const void *, data);
205 #if defined BB_INSMOD || defined BB_LSMOD
206 #ifndef __NR_query_module
207 static const int __NR_query_module = 167;
209 _syscall5(int, query_module, const char *, name, int, which,
210 void *, buf, size_t, bufsize, size_t*, ret);
214 #if defined (BB_CP_MV) || defined (BB_DU)
216 #define HASH_SIZE 311 /* Should be prime */
217 #define hash_inode(i) ((i) % HASH_SIZE)
219 static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE];
222 * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in
223 * `ino_dev_hashtable', else return 0
225 * If NAME is a non-NULL pointer to a character pointer, and there is
226 * a match, then set *NAME to the value of the name slot in that
229 int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name)
231 ino_dev_hashtable_bucket_t *bucket;
233 bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)];
234 while (bucket != NULL) {
235 if ((bucket->ino == statbuf->st_ino) &&
236 (bucket->dev == statbuf->st_dev))
238 if (name) *name = bucket->name;
241 bucket = bucket->next;
246 /* Add statbuf to statbuf hash table */
247 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name)
251 ino_dev_hashtable_bucket_t *bucket;
253 i = hash_inode(statbuf->st_ino);
254 s = name ? strlen(name) : 0;
255 bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s);
256 bucket->ino = statbuf->st_ino;
257 bucket->dev = statbuf->st_dev;
259 strcpy(bucket->name, name);
261 bucket->name[0] = '\0';
262 bucket->next = ino_dev_hashtable[i];
263 ino_dev_hashtable[i] = bucket;
266 /* Clear statbuf hash table */
267 void reset_ino_dev_hashtable(void)
270 ino_dev_hashtable_bucket_t *bucket;
272 for (i = 0; i < HASH_SIZE; i++) {
273 while (ino_dev_hashtable[i] != NULL) {
274 bucket = ino_dev_hashtable[i]->next;
275 free(ino_dev_hashtable[i]);
276 ino_dev_hashtable[i] = bucket;
281 #endif /* BB_CP_MV || BB_DU */
283 #if defined (BB_CP_MV) || defined (BB_DU) || defined (BB_LN) || defined (BB_DPKG_DEB)
285 * Return TRUE if a fileName is a directory.
286 * Nonexistant files return FALSE.
288 int is_directory(const char *fileName, const int followLinks, struct stat *statBuf)
293 if (statBuf == NULL) {
294 statBuf = (struct stat *)xmalloc(sizeof(struct stat));
298 if (followLinks == TRUE)
299 status = stat(fileName, statBuf);
301 status = lstat(fileName, statBuf);
303 if (status < 0 || !(S_ISDIR(statBuf->st_mode))) {
316 #if defined BB_AR || defined BB_CP_MV
318 * Copy chunksize bytes between two file descriptors
320 int copy_file_chunk(int srcfd, int dstfd, size_t chunksize)
323 char buffer[BUFSIZ]; /* BUFSIZ is declared in stdio.h */
325 while (chunksize > 0) {
326 if (chunksize > BUFSIZ)
330 if (full_write(dstfd, buffer, full_read(srcfd, buffer, size)) < size)
339 #if defined (BB_CP_MV) || defined BB_DPKG
341 * Copy one file to another, while possibly preserving its modes, times, and
342 * modes. Returns TRUE if successful, or FALSE on a failure with an error
343 * message output. (Failure is not indicated if attributes cannot be set.)
347 copy_file(const char *srcName, const char *destName,
348 int setModes, int followLinks, int forceFlag)
353 struct stat srcStatBuf;
354 struct stat dstStatBuf;
355 struct utimbuf times;
357 if (followLinks == TRUE)
358 status = stat(srcName, &srcStatBuf);
360 status = lstat(srcName, &srcStatBuf);
363 perror_msg("%s", srcName);
367 if (followLinks == TRUE)
368 status = stat(destName, &dstStatBuf);
370 status = lstat(destName, &dstStatBuf);
372 if (status < 0 || forceFlag==TRUE) {
374 dstStatBuf.st_ino = -1;
375 dstStatBuf.st_dev = -1;
378 if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
379 (srcStatBuf.st_ino == dstStatBuf.st_ino)) {
380 error_msg("Copying file \"%s\" to itself", srcName);
384 if (S_ISDIR(srcStatBuf.st_mode)) {
385 //fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
386 /* Make sure the directory is writable */
387 status = mkdir(destName, 0777777 ^ umask(0));
388 if (status < 0 && errno != EEXIST) {
389 perror_msg("%s", destName);
392 } else if (S_ISLNK(srcStatBuf.st_mode)) {
393 char link_val[BUFSIZ + 1];
396 //fprintf(stderr, "copying link %s to %s\n", srcName, destName);
397 /* Warning: This could possibly truncate silently, to BUFSIZ chars */
398 link_size = readlink(srcName, &link_val[0], BUFSIZ);
400 perror_msg("%s", srcName);
403 link_val[link_size] = '\0';
404 status = symlink(link_val, destName);
406 perror_msg("%s", destName);
409 #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
410 if (setModes == TRUE) {
411 /* Try to set owner, but fail silently like GNU cp */
412 lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
416 } else if (S_ISFIFO(srcStatBuf.st_mode)) {
417 //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
418 if (mkfifo(destName, 0644) < 0) {
419 perror_msg("%s", destName);
422 } else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
423 || S_ISSOCK(srcStatBuf.st_mode)) {
424 //fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
425 if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
426 perror_msg("%s", destName);
429 } else if (S_ISREG(srcStatBuf.st_mode)) {
430 //fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
431 rfd = open(srcName, O_RDONLY);
433 perror_msg("%s", srcName);
437 wfd = open(destName, O_WRONLY | O_CREAT | O_TRUNC,
440 perror_msg("%s", destName);
445 if (copy_file_chunk(rfd, wfd, srcStatBuf.st_size)==FALSE)
449 if (close(wfd) < 0) {
454 if (setModes == TRUE) {
455 /* This is fine, since symlinks never get here */
456 if (chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0)
457 perror_msg_and_die("%s", destName);
458 if (chmod(destName, srcStatBuf.st_mode) < 0)
459 perror_msg_and_die("%s", destName);
460 times.actime = srcStatBuf.st_atime;
461 times.modtime = srcStatBuf.st_mtime;
462 if (utime(destName, ×) < 0)
463 perror_msg_and_die("%s", destName);
469 perror_msg("%s", destName);
475 #endif /* BB_CP_MV */
479 #if defined BB_TAR || defined BB_LS ||defined BB_AR
481 #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
482 #define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
484 /* The special bits. If set, display SMODE0/1 instead of MODE0/1 */
485 static const mode_t SBIT[] = {
491 /* The 9 mode bits to test */
492 static const mode_t MBIT[] = {
493 S_IRUSR, S_IWUSR, S_IXUSR,
494 S_IRGRP, S_IWGRP, S_IXGRP,
495 S_IROTH, S_IWOTH, S_IXOTH
498 static const char MODE1[] = "rwxrwxrwx";
499 static const char MODE0[] = "---------";
500 static const char SMODE1[] = "..s..s..t";
501 static const char SMODE0[] = "..S..S..T";
504 * Return the standard ls-like mode string from a file mode.
505 * This is static and so is overwritten on each call.
507 const char *mode_string(int mode)
513 buf[0] = TYPECHAR(mode);
514 for (i = 0; i < 9; i++) {
516 buf[i + 1] = (mode & MBIT[i]) ? SMODE1[i] : SMODE0[i];
518 buf[i + 1] = (mode & MBIT[i]) ? MODE1[i] : MODE0[i];
522 #endif /* BB_TAR || BB_LS */
525 #if defined BB_TAR || defined BB_AR
527 * Return the standard ls-like time string from a time_t
528 * This is static and so is overwritten on each call.
530 const char *time_string(time_t timeVal)
538 str = ctime(&timeVal);
540 strcpy(buf, &str[4]);
543 if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) {
544 strcpy(&buf[7], &str[20]);
550 #endif /* BB_TAR || BB_AR */
552 #if defined BB_DD || defined BB_NC || defined BB_TAIL || defined BB_TAR || defined BB_AR || defined BB_CP_MV
554 * Write all of the supplied buffer out to a file.
555 * This does multiple writes as necessary.
556 * Returns the amount written, or -1 on an error.
558 int full_write(int fd, const char *buf, int len)
566 cc = write(fd, buf, len);
580 #if defined BB_AR || defined BB_CP_MV || defined BB_SH || defined BB_TAR
582 * Read all of the supplied buffer from a file.
583 * This does multiple reads as necessary.
584 * Returns the amount read, or -1 on an error.
585 * A short read is returned on an end of file.
587 int full_read(int fd, char *buf, int len)
595 cc = read(fd, buf, len);
610 #endif /* BB_TAR || BB_TAIL || BB_AR || BB_SH */
613 #if defined (BB_CHMOD_CHOWN_CHGRP) \
614 || defined (BB_CP_MV) \
615 || defined (BB_FIND) \
616 || defined (BB_INSMOD) \
622 * Walk down all the directories under the specified
623 * location, and do something (something specified
624 * by the fileAction and dirAction function pointers).
626 * Unfortunately, while nftw(3) could replace this and reduce
627 * code size a bit, nftw() wasn't supported before GNU libc 2.1,
628 * and so isn't sufficiently portable to take over since glibc2.1
629 * is so stinking huge.
631 int recursive_action(const char *fileName,
632 int recurse, int followLinks, int depthFirst,
633 int (*fileAction) (const char *fileName,
634 struct stat * statbuf,
636 int (*dirAction) (const char *fileName,
637 struct stat * statbuf,
645 if (followLinks == TRUE)
646 status = stat(fileName, &statbuf);
648 status = lstat(fileName, &statbuf);
651 #ifdef BB_DEBUG_PRINT_SCAFFOLD
653 "status=%d followLinks=%d TRUE=%d\n",
654 status, followLinks, TRUE);
656 perror_msg("%s", fileName);
660 if ((followLinks == FALSE) && (S_ISLNK(statbuf.st_mode))) {
661 if (fileAction == NULL)
664 return fileAction(fileName, &statbuf, userData);
667 if (recurse == FALSE) {
668 if (S_ISDIR(statbuf.st_mode)) {
669 if (dirAction != NULL)
670 return (dirAction(fileName, &statbuf, userData));
676 if (S_ISDIR(statbuf.st_mode)) {
679 if (dirAction != NULL && depthFirst == FALSE) {
680 status = dirAction(fileName, &statbuf, userData);
681 if (status == FALSE) {
682 perror_msg("%s", fileName);
684 } else if (status == SKIP)
687 dir = opendir(fileName);
689 perror_msg("%s", fileName);
692 while ((next = readdir(dir)) != NULL) {
693 char nextFile[BUFSIZ + 1];
695 if ((strcmp(next->d_name, "..") == 0)
696 || (strcmp(next->d_name, ".") == 0)) {
699 if (strlen(fileName) + strlen(next->d_name) + 1 > BUFSIZ) {
700 error_msg(name_too_long);
703 memset(nextFile, 0, sizeof(nextFile));
704 sprintf(nextFile, "%s/%s", fileName, next->d_name);
706 recursive_action(nextFile, TRUE, followLinks, depthFirst,
707 fileAction, dirAction, userData);
708 if (status == FALSE) {
713 status = closedir(dir);
715 perror_msg("%s", fileName);
718 if (dirAction != NULL && depthFirst == TRUE) {
719 status = dirAction(fileName, &statbuf, userData);
720 if (status == FALSE) {
721 perror_msg("%s", fileName);
726 if (fileAction == NULL)
729 return fileAction(fileName, &statbuf, userData);
734 #endif /* BB_CHMOD_CHOWN_CHGRP || BB_CP_MV || BB_FIND || BB_LS || BB_INSMOD */
738 #if defined (BB_TAR) || defined (BB_MKDIR)
740 * Attempt to create the directories along the specified path, except for
741 * the final component. The mode is given for the final directory only,
742 * while all previous ones get default protections. Errors are not reported
743 * here, as failures to restore files can be reported later.
745 extern int create_path(const char *name, int mode)
749 char buf[BUFSIZ + 1];
753 for (cp = buf; *cp == '/'; cp++);
754 cp = strchr(cp, '/');
757 cp = strchr(cp + 1, '/');
759 retVal = mkdir(buf, cp ? 0777 : mode);
760 if (retVal != 0 && errno != EEXIST) {
761 perror_msg("%s", buf);
768 #endif /* BB_TAR || BB_MKDIR */
772 #if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR) \
773 || defined (BB_MKFIFO) || defined (BB_MKNOD) || defined (BB_AR)
774 /* [ugoa]{+|-|=}[rwxst] */
776 extern int parse_mode(const char *s, mode_t * theMode)
778 static const mode_t group_set[] = {
779 S_ISUID | S_IRWXU, /* u */
780 S_ISGID | S_IRWXG, /* g */
782 S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO /* a */
785 static const mode_t mode_set[] = {
786 S_IRUSR | S_IRGRP | S_IROTH, /* r */
787 S_IWUSR | S_IWGRP | S_IWOTH, /* w */
788 S_IXUSR | S_IXGRP | S_IXOTH, /* x */
789 S_ISUID | S_ISGID, /* s */
793 static const char group_string[] = "ugoa";
794 static const char mode_string[] = "rwxst";
799 S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
814 if ((c = *s++) == '\0') {
817 for (p=group_string ; *p ; p++) {
819 groups |= group_set[(int)(p-group_string)];
828 if (groups == 0) { /* The default is "all" */
829 groups |= S_ISUID | S_ISGID | S_ISVTX
830 | S_IRWXU | S_IRWXG | S_IRWXO;
834 if ((c < '0') || (c > '7') || (mode | groups)) {
837 *theMode = strtol(--s, NULL, 8);
843 if (((c = *s++) != '\0') && (c != ',')) {
844 for (p=mode_string ; *p ; p++) {
846 mode |= mode_set[(int)(p-mode_string)];
850 break; /* We're done so break out of loop.*/
854 andMode &= ~(groups); /* Now fall through. */
856 orMode |= mode & groups;
859 andMode &= ~(mode & groups);
860 orMode &= ~(mode & groups);
872 /* BB_CHMOD_CHOWN_CHGRP || BB_MKDIR || BB_MKFIFO || BB_MKNOD */
878 #if defined BB_CHMOD_CHOWN_CHGRP || defined BB_PS || defined BB_LS \
879 || defined BB_TAR || defined BB_ID || defined BB_LOGGER \
880 || defined BB_LOGNAME || defined BB_WHOAMI || defined BB_SH
881 /* returns a uid given a username */
882 long my_getpwnam(char *name)
884 struct passwd *myuser;
886 myuser = getpwnam(name);
890 return myuser->pw_uid;
893 /* returns a gid given a group name */
894 long my_getgrnam(char *name)
896 struct group *mygroup;
898 mygroup = getgrnam(name);
902 return (mygroup->gr_gid);
905 /* gets a username given a uid */
906 void my_getpwuid(char *name, long uid)
908 struct passwd *myuser;
910 myuser = getpwuid(uid);
912 sprintf(name, "%-8ld ", (long)uid);
914 strcpy(name, myuser->pw_name);
917 /* gets a groupname given a gid */
918 void my_getgrgid(char *group, long gid)
920 struct group *mygroup;
922 mygroup = getgrgid(gid);
924 sprintf(group, "%-8ld ", (long)gid);
926 strcpy(group, mygroup->gr_name);
930 /* gets a gid given a user name */
931 long my_getpwnamegid(char *name)
933 struct group *mygroup;
934 struct passwd *myuser;
936 myuser=getpwnam(name);
938 error_msg_and_die( "unknown user name: %s", name);
940 mygroup = getgrgid(myuser->pw_gid);
942 error_msg_and_die( "unknown gid %ld", (long)myuser->pw_gid);
944 return mygroup->gr_gid;
948 /* BB_CHMOD_CHOWN_CHGRP || BB_PS || BB_LS || BB_TAR \
949 || BB_ID || BB_LOGGER || BB_LOGNAME || BB_WHOAMI */
952 #if (defined BB_CHVT) || (defined BB_DEALLOCVT) || (defined BB_SETKEYCODES)
954 /* From <linux/kd.h> */
955 static const int KDGKBTYPE = 0x4B33; /* get keyboard type */
956 static const int KB_84 = 0x01;
957 static const int KB_101 = 0x02; /* this is what we always answer */
959 int is_a_console(int fd)
964 return (ioctl(fd, KDGKBTYPE, &arg) == 0
965 && ((arg == KB_101) || (arg == KB_84)));
968 static int open_a_console(char *fnam)
973 fd = open(fnam, O_RDWR);
975 /* if failed, try read-only */
976 if (fd < 0 && errno == EACCES)
977 fd = open(fnam, O_RDONLY);
979 /* if failed, try write-only */
980 if (fd < 0 && errno == EACCES)
981 fd = open(fnam, O_WRONLY);
983 /* if failed, fail */
987 /* if not a console, fail */
988 if (!is_a_console(fd)) {
998 * Get an fd for use with kbd/console ioctls.
999 * We try several things because opening /dev/console will fail
1000 * if someone else used X (which does a chown on /dev/console).
1002 * if tty_name is non-NULL, try this one instead.
1005 int get_console_fd(char *tty_name)
1010 if (-1 == (fd = open_a_console(tty_name)))
1016 fd = open_a_console("/dev/tty");
1020 fd = open_a_console("/dev/tty0");
1024 fd = open_a_console("/dev/console");
1028 for (fd = 0; fd < 3; fd++)
1029 if (is_a_console(fd))
1032 error_msg("Couldnt get a file descriptor referring to the console");
1033 return -1; /* total failure */
1037 #endif /* BB_CHVT || BB_DEALLOCVT || BB_SETKEYCODES */
1040 #if defined BB_FIND || defined BB_INSMOD
1042 * Routine to see if a text string is matched by a wildcard pattern.
1043 * Returns TRUE if the text is matched, or FALSE if it is not matched
1044 * or if the pattern is invalid.
1045 * * matches zero or more characters
1046 * ? matches a single character
1047 * [abc] matches 'a', 'b' or 'c'
1048 * \c quotes character c
1049 * Adapted from code written by Ingo Wilken, and
1050 * then taken from sash, Copyright (c) 1999 by David I. Bell
1051 * Permission is granted to use, distribute, or modify this source,
1052 * provided that this copyright notice remains intact.
1053 * Permission to distribute this code under the GPL has been granted.
1055 extern int check_wildcard_match(const char *text, const char *pattern)
1057 const char *retryPat;
1058 const char *retryText;
1066 while (*text || *pattern) {
1078 while ((ch = *pattern++) != ']') {
1089 if (found == FALSE && len!=0) {
1092 if (found == TRUE) {
1093 if (strlen(pattern)==0 && len==1) {
1102 /* fall into next case */
1105 if (*text++ == '\0')
1116 /* fall into next case */
1134 if (pattern == NULL)
1140 #endif /* BB_FIND || BB_INSMOD */
1145 #if defined BB_DF || defined BB_MTAB
1148 * Given a block device, find the mount table entry if that block device
1151 * Given any other file (or directory), find the mount table entry for its
1154 extern struct mntent *find_mount_point(const char *name, const char *table)
1159 struct mntent *mountEntry;
1161 if (stat(name, &s) != 0)
1164 if ((s.st_mode & S_IFMT) == S_IFBLK)
1165 mountDevice = s.st_rdev;
1167 mountDevice = s.st_dev;
1170 if ((mountTable = setmntent(table, "r")) == 0)
1173 while ((mountEntry = getmntent(mountTable)) != 0) {
1174 if (strcmp(name, mountEntry->mnt_dir) == 0
1175 || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */
1177 if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */
1179 if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */
1182 endmntent(mountTable);
1185 #endif /* BB_DF || BB_MTAB */
1187 #if defined BB_INIT || defined BB_SYSLOGD
1188 /* try to open up the specified device */
1189 extern int device_open(char *device, int mode)
1193 m = mode | O_NONBLOCK;
1195 /* Retry up to 5 times */
1196 for (f = 0; f < 5; f++)
1197 if ((fd = open(device, m, 0600)) >= 0)
1201 /* Reset original flags. */
1203 fcntl(fd, F_SETFL, mode);
1206 #endif /* BB_INIT BB_SYSLOGD */
1209 #if defined BB_KILLALL || ( defined BB_FEATURE_LINUXRC && ( defined BB_HALT || defined BB_REBOOT || defined BB_POWEROFF ))
1210 #ifdef BB_FEATURE_USE_DEVPS_PATCH
1211 #include <linux/devps.h> /* For Erik's nifty devps device driver */
1214 #if defined BB_FEATURE_USE_DEVPS_PATCH
1215 /* find_pid_by_name()
1217 * This finds the pid of the specified process,
1218 * by using the /dev/ps device driver.
1220 * Returns a list of all matching PIDs
1222 extern pid_t* find_pid_by_name( char* pidName)
1225 char device[] = "/dev/ps";
1227 pid_t* pid_array = NULL;
1228 pid_t* pidList=NULL;
1231 fd = open(device, O_RDONLY);
1233 perror_msg_and_die("open failed for `%s'", device);
1235 /* Find out how many processes there are */
1236 if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
1237 perror_msg_and_die("\nDEVPS_GET_PID_LIST");
1239 /* Allocate some memory -- grab a few extras just in case
1240 * some new processes start up while we wait. The kernel will
1241 * just ignore any extras if we give it too many, and will trunc.
1242 * the list if we give it too few. */
1243 pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t));
1244 pid_array[0] = num_pids+10;
1246 /* Now grab the pid list */
1247 if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
1248 perror_msg_and_die("\nDEVPS_GET_PID_LIST");
1250 /* Now search for a match */
1251 for (i=1, j=0; i<pid_array[0] ; i++) {
1253 struct pid_info info;
1255 info.pid = pid_array[i];
1256 if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
1257 perror_msg_and_die("\nDEVPS_GET_PID_INFO");
1259 /* Make sure we only match on the process name */
1260 p=info.command_line+1;
1261 while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) {
1267 if ((strstr(info.command_line, pidName) != NULL)
1268 && (strlen(pidName) == strlen(info.command_line))) {
1269 pidList=xrealloc( pidList, sizeof(pid_t) * (j+2));
1270 pidList[j++]=info.pid;
1280 if (close (fd) != 0)
1281 perror_msg_and_die("close failed for `%s'", device);
1285 #else /* BB_FEATURE_USE_DEVPS_PATCH */
1287 /* find_pid_by_name()
1289 * This finds the pid of the specified process.
1290 * Currently, it's implemented by rummaging through
1291 * the proc filesystem.
1293 * Returns a list of all matching PIDs
1295 extern pid_t* find_pid_by_name( char* pidName)
1298 struct dirent *next;
1299 pid_t* pidList=NULL;
1302 dir = opendir("/proc");
1304 perror_msg_and_die("Cannot open /proc");
1306 while ((next = readdir(dir)) != NULL) {
1311 /* If it isn't a number, we don't want it */
1312 if (!isdigit(*next->d_name))
1315 sprintf(filename, "/proc/%s/cmdline", next->d_name);
1316 status = fopen(filename, "r");
1320 fgets(buffer, 256, status);
1323 if (strstr(get_last_path_component(buffer), pidName) != NULL) {
1324 pidList=xrealloc( pidList, sizeof(pid_t) * (i+2));
1325 pidList[i++]=strtol(next->d_name, NULL, 0);
1333 #endif /* BB_FEATURE_USE_DEVPS_PATCH */
1334 #endif /* BB_KILLALL || ( BB_FEATURE_LINUXRC && ( BB_HALT || BB_REBOOT || BB_POWEROFF )) */
1337 /* this should really be farmed out to libbusybox.a */
1338 extern void *xmalloc(size_t size)
1340 void *ptr = malloc(size);
1343 error_msg_and_die(memory_exhausted);
1347 extern void *xrealloc(void *old, size_t size)
1349 void *ptr = realloc(old, size);
1351 error_msg_and_die(memory_exhausted);
1355 extern void *xcalloc(size_t nmemb, size_t size)
1357 void *ptr = calloc(nmemb, size);
1359 error_msg_and_die(memory_exhausted);
1364 #if defined BB_NFSMOUNT || defined BB_LS || defined BB_SH || \
1365 defined BB_WGET || defined BB_DPKG_DEB || defined BB_TAR || \
1368 extern char * xstrdup (const char *s) {
1377 error_msg_and_die(memory_exhausted);
1384 #if defined BB_NFSMOUNT
1385 extern char * xstrndup (const char *s, int n) {
1389 error_msg_and_die("xstrndup bug");
1393 return safe_strncpy(t,s,n);
1397 #if defined BB_IFCONFIG || defined BB_ROUTE || defined BB_NFSMOUNT || \
1398 defined BB_FEATURE_MOUNT_LOOP
1399 /* Like strncpy but make sure the resulting string is always 0 terminated. */
1400 extern char * safe_strncpy(char *dst, const char *src, size_t size)
1403 return strncpy(dst, src, size-1);
1407 #if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT)
1408 extern int vdprintf(int d, const char *format, va_list ap)
1413 len = vsprintf(buf, format, ap);
1414 return write(d, buf, len);
1416 #endif /* BB_SYSLOGD */
1419 #if defined BB_FEATURE_MOUNT_LOOP
1421 #include "loop.h" /* Pull in loop device support */
1423 extern int del_loop(const char *device)
1427 if ((fd = open(device, O_RDONLY)) < 0) {
1428 perror_msg("%s", device);
1431 if (ioctl(fd, LOOP_CLR_FD, 0) < 0) {
1432 perror_msg("ioctl: LOOP_CLR_FD");
1439 extern int set_loop(const char *device, const char *file, int offset,
1442 struct loop_info loopinfo;
1445 mode = *loopro ? O_RDONLY : O_RDWR;
1446 if ((ffd = open(file, mode)) < 0 && !*loopro
1447 && (errno != EROFS || (ffd = open(file, mode = O_RDONLY)) < 0)) {
1448 perror_msg("%s", file);
1451 if ((fd = open(device, mode)) < 0) {
1453 perror_msg("%s", device);
1456 *loopro = (mode == O_RDONLY);
1458 memset(&loopinfo, 0, sizeof(loopinfo));
1459 safe_strncpy(loopinfo.lo_name, file, LO_NAME_SIZE);
1461 loopinfo.lo_offset = offset;
1463 loopinfo.lo_encrypt_key_size = 0;
1464 if (ioctl(fd, LOOP_SET_FD, ffd) < 0) {
1465 perror_msg("ioctl: LOOP_SET_FD");
1470 if (ioctl(fd, LOOP_SET_STATUS, &loopinfo) < 0) {
1471 (void) ioctl(fd, LOOP_CLR_FD, 0);
1472 perror_msg("ioctl: LOOP_SET_STATUS");
1482 extern char *find_unused_loop_device(void)
1486 struct stat statbuf;
1487 struct loop_info loopinfo;
1489 for (i = 0; i <= 7; i++) {
1490 sprintf(dev, "/dev/loop%d", i);
1491 if (stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) {
1492 if ((fd = open(dev, O_RDONLY)) >= 0) {
1493 if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) == -1) {
1494 if (errno == ENXIO) { /* probably free */
1505 #endif /* BB_FEATURE_MOUNT_LOOP */
1507 #if defined BB_MOUNT || defined BB_DF || ( defined BB_UMOUNT && ! defined BB_MTAB)
1508 extern int find_real_root_device_name(char* name)
1511 struct dirent *entry;
1512 struct stat statBuf, rootStat;
1513 char fileName[BUFSIZ];
1515 if (stat("/", &rootStat) != 0) {
1516 error_msg("could not stat '/'");
1520 dir = opendir("/dev");
1522 error_msg("could not open '/dev'");
1526 while((entry = readdir(dir)) != NULL) {
1528 /* Must skip ".." since that is "/", and so we
1529 * would get a false positive on ".." */
1530 if (strcmp(entry->d_name, "..") == 0)
1533 snprintf( fileName, strlen(name)+1, "/dev/%s", entry->d_name);
1535 if (stat(fileName, &statBuf) != 0)
1537 /* Some char devices have the same dev_t as block
1538 * devices, so make sure this is a block device */
1539 if (! S_ISBLK(statBuf.st_mode))
1541 if (statBuf.st_rdev == rootStat.st_rdev) {
1542 strcpy(name, fileName);
1552 /* get_line_from_file() - This function reads an entire line from a text file
1553 * up to a newline. It returns a malloc'ed char * which must be stored and
1554 * free'ed by the caller. */
1555 extern char *get_line_from_file(FILE *file)
1557 static const int GROWBY = 80; /* how large we will grow strings by */
1561 char *linebuf = NULL;
1568 /* grow the line buffer as necessary */
1569 while (idx > linebufsz-2)
1570 linebuf = xrealloc(linebuf, linebufsz += GROWBY);
1571 linebuf[idx++] = (char)ch;
1572 if ((char)ch == '\n')
1584 extern void print_file(FILE *file)
1588 while ((c = getc(file)) != EOF)
1594 extern int print_file_by_name(char *filename)
1597 if ((file = wfopen(filename, "r")) == NULL)
1604 #if defined BB_ECHO || defined BB_SH || defined BB_TR
1605 char process_escape_sequence(char **ptr)
1607 static const char charmap[] = {
1608 'a', 'b', 'f', 'n', 'r', 't', 'v', '\\', 0,
1609 '\a', '\b', '\f', '\n', '\r', '\t', '\v', '\\', '\\' };
1619 for ( num_digits = 0 ; num_digits < 3 ; ++num_digits) {
1620 if ((*q < '0') || (*q > '7')) { /* not a digit? */
1623 n = n * 8 + (*q++ - '0');
1626 if (num_digits == 0) { /* mnemonic escape sequence? */
1627 for (p=charmap ; *p ; p++) {
1633 n = *(p+(sizeof(charmap)/2));
1636 /* doesn't hurt to fall through to here from mnemonic case */
1637 if (n > UCHAR_MAX) { /* is octal code too big for a char? */
1638 n /= 8; /* adjust value and */
1639 --q; /* back up one char */
1647 #if defined BB_BASENAME || defined BB_LN || defined BB_SH || defined BB_INIT || \
1648 ! defined BB_FEATURE_USE_DEVPS_PATCH || defined BB_WGET
1649 char *get_last_path_component(char *path)
1651 char *s=path+strlen(path)-1;
1653 /* strip trailing slashes */
1654 while (s != path && *s == '/') {
1658 /* find last component */
1659 s = strrchr(path, '/');
1660 if (s == NULL || s[1] == '\0')
1667 #if defined BB_GREP || defined BB_SED
1669 void xregcomp(regex_t *preg, const char *regex, int cflags)
1672 if ((ret = regcomp(preg, regex, cflags)) != 0) {
1673 int errmsgsz = regerror(ret, preg, NULL, 0);
1674 char *errmsg = xmalloc(errmsgsz);
1675 regerror(ret, preg, errmsg, errmsgsz);
1676 error_msg_and_die("xregcomp: %s", errmsg);
1681 #if defined BB_CAT || defined BB_HEAD || defined BB_WC
1682 FILE *wfopen(const char *path, const char *mode)
1685 if ((fp = fopen(path, mode)) == NULL) {
1686 perror_msg("%s", path);
1693 #if defined BB_HOSTNAME || defined BB_LOADACM || defined BB_MORE \
1694 || defined BB_SED || defined BB_SH || defined BB_TAR || defined BB_UNIQ \
1695 || defined BB_WC || defined BB_CMP || defined BB_SORT || defined BB_WGET \
1696 || defined BB_MOUNT || defined BB_ROUTE
1697 FILE *xfopen(const char *path, const char *mode)
1700 if ((fp = fopen(path, mode)) == NULL)
1701 perror_msg_and_die("%s", path);
1706 static int applet_name_compare(const void *x, const void *y)
1708 const char *name = x;
1709 const struct BB_applet *applet = y;
1711 return strcmp(name, applet->name);
1714 extern size_t NUM_APPLETS;
1716 struct BB_applet *find_applet_by_name(const char *name)
1718 return bsearch(name, applets, NUM_APPLETS, sizeof(struct BB_applet),
1719 applet_name_compare);
1722 void run_applet_by_name(const char *name, int argc, char **argv)
1724 /* Do a binary search to find the applet entry given the name. */
1725 if ((applet_using = find_applet_by_name(name)) != NULL) {
1726 applet_name = applet_using->name;
1727 if (argv[1] && strcmp(argv[1], "--help") == 0)
1729 exit((*(applet_using->main)) (argc, argv));
1733 #if defined BB_DD || defined BB_TAIL || defined BB_STTY
1734 unsigned long parse_number(const char *numstr,
1735 const struct suffix_mult *suffixes)
1737 const struct suffix_mult *sm;
1738 unsigned long int ret;
1742 ret = strtoul(numstr, &end, 10);
1744 error_msg_and_die("invalid number `%s'", numstr);
1745 while (end[0] != '\0') {
1749 len = strlen(sm->suffix);
1750 if (strncmp(sm->suffix, end, len) == 0) {
1761 error_msg_and_die("invalid number `%s'", numstr);
1767 #if defined BB_DD || defined BB_NC || defined BB_TAIL
1768 ssize_t safe_read(int fd, void *buf, size_t count)
1773 n = read(fd, buf, count);
1774 } while (n < 0 && errno == EINTR);
1780 #ifdef BB_FEATURE_HUMAN_READABLE
1781 const char *format(unsigned long val, unsigned long hr)
1783 static const char strings[] = { '0', 0, 'k', 0, 'M', 0, 'G', 0 };
1784 static const char fmt[] = "%lu";
1785 static const char fmt_u[] = "%lu.%lu%s";
1787 static char str[10];
1789 unsigned long frac __attribute__ ((unused)); /* 'may be uninitialized' warning is ok */
1794 if(val == 0) { /* This may be omitted to reduce size */
1795 return strings; /* at the cost of speed. */
1804 while ((val >= KILOBYTE) && (*u != 'G')) {
1807 frac = (((val % KILOBYTE) * 10) + (KILOBYTE/2)) / KILOBYTE;
1809 if (frac >= 10) { /* We need to round up here. */
1816 /* If f==fmt then 'frac' and 'u' are ignored and need not be set. */
1817 snprintf(str, sizeof(str), f, val, frac, u);
1823 #if defined(BB_GREP) || defined(BB_HOSTNAME) || defined(BB_SED) || defined(BB_TAR) || defined(BB_WGET) || defined(BB_XARGS)
1826 size_t len = strlen(s);
1831 if (s[len-1] == '\n')
1839 c-file-style: "linux"