4 * Copyright (C) tons of folks. Tracking down who wrote what
5 * isn't something I'm going to worry about... If you wrote something
6 * here, please feel free to acknowledge your work.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
23 * Permission has been granted to redistribute this code under the GPL.
39 #if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
40 # if defined BB_FEATURE_USE_PROCFS
41 const char mtab_file[] = "/proc/mounts";
44 const char mtab_file[] = "/etc/mtab";
46 # error With (BB_MOUNT||BB_UMOUNT||BB_DF) defined, you must define either BB_MTAB or BB_FEATURE_USE_PROCFS
52 extern void usage(const char *usage)
54 fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", BB_VER, BB_BT);
55 fprintf(stderr, "Usage: %s\n", usage);
60 #if defined (BB_INIT) || defined (BB_PS)
62 #if ! defined BB_FEATURE_USE_PROCFS
63 #error Sorry, I depend on the /proc filesystem right now.
65 /* Returns kernel version encoded as major*65536 + minor*256 + patch,
66 * so, for example, to check if the kernel is greater than 2.2.11:
67 * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
73 int major=0, minor=0, patch=0;
74 char* filename="/proc/sys/kernel/osrelease";
76 file = fopen(filename,"r");
78 /* bummer, /proc must not be mounted... */
81 fscanf(file,"%d.%d.%d",&major,&minor,&patch);
83 return major*65536 + minor*256 + patch;
90 #if defined (BB_CP) || defined (BB_MV)
92 * Return TRUE if a fileName is a directory.
93 * Nonexistant files return FALSE.
95 int isDirectory(const char *name)
99 if (stat(name, &statBuf) < 0)
101 if (S_ISDIR(statBuf.st_mode))
108 * Copy one file to another, while possibly preserving its modes, times,
109 * and modes. Returns TRUE if successful, or FALSE on a failure with an
110 * error message output. (Failure is not indicted if the attributes cannot
115 copyFile( const char *srcName, const char *destName,
116 int setModes, int followLinks)
123 struct stat srcStatBuf;
124 struct stat dstStatBuf;
125 struct utimbuf times;
127 if (followLinks == FALSE)
128 result = stat(srcName, &srcStatBuf);
130 result = lstat(srcName, &srcStatBuf);
136 if (followLinks == FALSE)
137 result = stat(destName, &dstStatBuf);
139 result = lstat(destName, &dstStatBuf);
141 dstStatBuf.st_ino = -1;
142 dstStatBuf.st_dev = -1;
145 if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
146 (srcStatBuf.st_ino == dstStatBuf.st_ino)) {
147 fprintf(stderr, "Copying file \"%s\" to itself\n", srcName);
151 if (S_ISDIR(srcStatBuf.st_mode)) {
152 //fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
153 /* Make sure the directory is writable */
154 if (mkdir(destName, 0777777 ^ umask(0))) {
158 } else if (S_ISLNK(srcStatBuf.st_mode)) {
162 //fprintf(stderr, "copying link %s to %s\n", srcName, destName);
163 link_val = (char *) alloca(PATH_MAX + 2);
164 link_size = readlink(srcName, link_val, PATH_MAX + 1);
169 link_val[link_size] = '\0';
170 link_size = symlink(link_val, destName);
171 if (link_size != 0) {
175 } else if (S_ISFIFO(srcStatBuf.st_mode)) {
176 //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
177 if (mkfifo(destName, 644)) {
181 } else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
182 || S_ISSOCK (srcStatBuf.st_mode)) {
183 //fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
184 if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev)) {
188 } else if (S_ISREG(srcStatBuf.st_mode)) {
189 //fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
190 rfd = open(srcName, O_RDONLY);
196 wfd = creat(destName, srcStatBuf.st_mode);
203 while ((rcc = read(rfd, buf, sizeof(buf))) > 0) {
204 if (fullWrite(wfd, buf, rcc) < 0)
212 if (close(wfd) < 0) {
217 if (setModes == TRUE) {
218 //fprintf(stderr, "Setting permissions for %s\n", destName);
219 chmod(destName, srcStatBuf.st_mode);
220 #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
221 if (followLinks == FALSE)
222 lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
225 chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
227 times.actime = srcStatBuf.st_atime;
228 times.modtime = srcStatBuf.st_mtime;
230 utime(destName, ×);
247 #if defined BB_TAR || defined BB_LS
249 #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
250 #define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
252 /* The special bits. If set, display SMODE0/1 instead of MODE0/1 */
253 static const mode_t SBIT[] = {
259 /* The 9 mode bits to test */
260 static const mode_t MBIT[] = {
261 S_IRUSR, S_IWUSR, S_IXUSR,
262 S_IRGRP, S_IWGRP, S_IXGRP,
263 S_IROTH, S_IWOTH, S_IXOTH
266 #define MODE1 "rwxrwxrwx"
267 #define MODE0 "---------"
268 #define SMODE1 "..s..s..t"
269 #define SMODE0 "..S..S..T"
272 * Return the standard ls-like mode string from a file mode.
273 * This is static and so is overwritten on each call.
275 const char *modeString(int mode)
280 buf[0] = TYPECHAR(mode);
281 for (i=0; i<9; i++) {
283 buf[i+1] = (mode & MBIT[i])?
284 SMODE1[i] : SMODE0[i];
286 buf[i+1] = (mode & MBIT[i])?
296 * Return the standard ls-like time string from a time_t
297 * This is static and so is overwritten on each call.
299 const char *timeString(time_t timeVal)
307 str = ctime(&timeVal);
309 strcpy(buf, &str[4]);
312 if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) {
313 strcpy(&buf[7], &str[20]);
321 * Write all of the supplied buffer out to a file.
322 * This does multiple writes as necessary.
323 * Returns the amount written, or -1 on an error.
325 int fullWrite(int fd, const char *buf, int len)
333 cc = write(fd, buf, len);
348 #if defined BB_TAR || defined BB_TAIL
350 * Read all of the supplied buffer from a file.
351 * This does multiple reads as necessary.
352 * Returns the amount read, or -1 on an error.
353 * A short read is returned on an end of file.
355 int fullRead(int fd, char *buf, int len)
363 cc = read(fd, buf, len);
381 #if defined (BB_CHOWN) || defined (BB_CP) || defined (BB_FIND) || defined (BB_LS) || defined (BB_INSMOD)
383 * Walk down all the directories under the specified
384 * location, and do something (something specified
385 * by the fileAction and dirAction function pointers).
387 * Unfortunatly, while nftw(3) could replace this and reduce
388 * code size a bit, nftw() wasn't supported before GNU libc 2.1,
389 * and so isn't sufficiently portable to take over since glibc2.1
390 * is so stinking huge.
393 recursiveAction(const char *fileName, int recurse, int followLinks, int depthFirst,
394 int (*fileAction) (const char *fileName, struct stat* statbuf),
395 int (*dirAction) (const char *fileName, struct stat* statbuf))
401 if (followLinks == TRUE)
402 status = stat(fileName, &statbuf);
404 status = lstat(fileName, &statbuf);
411 if ( (followLinks == FALSE) && (S_ISLNK(statbuf.st_mode)) ) {
412 if (fileAction == NULL)
415 return (fileAction(fileName, &statbuf));
418 if (recurse == FALSE) {
419 if (S_ISDIR(statbuf.st_mode)) {
420 if (dirAction != NULL)
421 return (dirAction(fileName, &statbuf));
427 if (S_ISDIR(statbuf.st_mode)) {
429 dir = opendir(fileName);
434 if (dirAction != NULL && depthFirst == FALSE) {
435 status = dirAction(fileName, &statbuf);
436 if (status == FALSE) {
441 while ((next = readdir(dir)) != NULL) {
442 char nextFile[NAME_MAX];
443 if ((strcmp(next->d_name, "..") == 0)
444 || (strcmp(next->d_name, ".") == 0)) {
447 sprintf(nextFile, "%s/%s", fileName, next->d_name);
449 recursiveAction(nextFile, TRUE, followLinks, depthFirst,
450 fileAction, dirAction);
456 status = closedir(dir);
461 if (dirAction != NULL && depthFirst == TRUE) {
462 status = dirAction(fileName, &statbuf);
463 if (status == FALSE) {
469 if (fileAction == NULL)
472 return (fileAction(fileName, &statbuf));
481 #if defined (BB_TAR) || defined (BB_MKDIR)
483 * Attempt to create the directories along the specified path, except for
484 * the final component. The mode is given for the final directory only,
485 * while all previous ones get default protections. Errors are not reported
486 * here, as failures to restore files can be reported later.
488 extern void createPath (const char *name, int mode)
495 cp = strchr (buf, '/');
498 cp = strchr (cp + 1, '/');
500 mkdir (buf, cp ? 0777 : mode);
508 #if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR)
509 /* [ugoa]{+|-|=}[rwxst] */
514 parse_mode( const char* s, mode_t* theMode)
516 mode_t andMode = S_ISVTX|S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
525 switch ( c = *s++ ) {
529 groups |= S_ISUID|S_IRWXU;
532 groups |= S_ISGID|S_IRWXG;
538 groups |= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
544 if ( groups == 0 ) /* The default is "all" */
545 groups |= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
548 if ( isdigit(c) && c >= '0' && c <= '7' &&
549 mode == 0 && groups == 0 ) {
550 *theMode = strtol(--s, NULL, 8);
559 while ( (c = *s++) != '\0' ) {
564 mode |= S_IRUSR|S_IRGRP|S_IROTH;
567 mode |= S_IWUSR|S_IWGRP|S_IWOTH;
570 mode |= S_IXUSR|S_IXGRP|S_IXOTH;
573 mode |= S_IXGRP|S_ISUID|S_ISGID;
587 andMode &= ~(groups);
590 orMode |= mode & groups;
593 andMode &= ~(mode & groups);
597 } while ( c == ',' );
612 #if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_PS)
614 /* Use this to avoid needing the glibc NSS stuff
615 * This uses storage buf to hold things.
618 my_getid(const char *filename, char *name, uid_t id)
621 char *rname, *start, *end, buf[128];
624 file=fopen(filename,"r");
630 while (fgets (buf, 128, file) != NULL) {
635 end = strchr (start, ':');
642 end = strchr (start, ':');
647 rid = (uid_t) strtol (start, &end, 10);
652 if (0 == strcmp(rname, name)) {
657 if ( id != -1 && id == rid ) {
658 strncpy(name, rname, 8);
668 my_getpwnam(char *name)
670 return my_getid("/etc/passwd", name, -1);
674 my_getgrnam(char *name)
676 return my_getid("/etc/group", name, -1);
680 my_getpwuid(char* name, uid_t uid)
682 my_getid("/etc/passwd", name, uid);
686 my_getgrgid(char* group, gid_t gid)
688 my_getid("/etc/group", group, gid);
697 #if (defined BB_CHVT) || (defined BB_DEALLOCVT)
700 #include <linux/kd.h>
701 #include <sys/ioctl.h>
703 int is_a_console(int fd)
708 return (ioctl(fd, KDGKBTYPE, &arg) == 0
709 && ((arg == KB_101) || (arg == KB_84)));
712 static int open_a_console(char *fnam)
717 fd = open(fnam, O_RDWR);
719 /* if failed, try read-only */
720 if (fd < 0 && errno == EACCES)
721 fd = open(fnam, O_RDONLY);
723 /* if failed, try write-only */
724 if (fd < 0 && errno == EACCES)
725 fd = open(fnam, O_WRONLY);
727 /* if failed, fail */
731 /* if not a console, fail */
732 if (! is_a_console(fd))
743 * Get an fd for use with kbd/console ioctls.
744 * We try several things because opening /dev/console will fail
745 * if someone else used X (which does a chown on /dev/console).
747 * if tty_name is non-NULL, try this one instead.
750 int get_console_fd(char* tty_name)
756 if (-1 == (fd = open_a_console(tty_name)))
762 fd = open_a_console("/dev/tty");
766 fd = open_a_console("/dev/tty0");
770 fd = open_a_console("/dev/console");
774 for (fd = 0; fd < 3; fd++)
775 if (is_a_console(fd))
779 "Couldnt get a file descriptor referring to the console\n");
780 return -1; /* total failure */
787 #if !defined BB_REGEXP && (defined BB_GREP || defined BB_SED)
789 /* Do a case insensitive strstr() */
790 char* stristr(char *haystack, const char *needle)
792 int len = strlen( needle );
794 if( !strncasecmp( haystack, needle, len ) )
805 /* This tries to find a needle in a haystack, but does so by
806 * only trying to match literal strings (look 'ma, no regexps!)
807 * This is short, sweet, and carries _very_ little baggage,
808 * unlike its beefier cousin in regexp.c
811 extern int find_match(char *haystack, char *needle, int ignoreCase)
814 if (ignoreCase == FALSE)
815 haystack = strstr (haystack, needle);
817 haystack = stristr (haystack, needle);
818 if (haystack == NULL)
824 /* This performs substitutions after a string match has been found. */
825 extern int replace_match(char *haystack, char *needle, char *newNeedle, int ignoreCase)
828 char *where, *slider, *slider1, *oldhayStack;
830 if (ignoreCase == FALSE)
831 where = strstr (haystack, needle);
833 where = stristr (haystack, needle);
835 if (strcmp(needle, newNeedle)==0)
838 oldhayStack = (char*)malloc((unsigned)(strlen(haystack)));
841 strcpy(oldhayStack, haystack);
843 if ( strlen(newNeedle) > strlen(needle)) {
844 haystack = (char *)realloc(haystack, (unsigned)(strlen(haystack) -
845 strlen(needle) + strlen(newNeedle)));
848 for(slider=haystack,slider1=oldhayStack;slider!=where;slider++,slider1++);
850 haystack=strcat(haystack, newNeedle);
851 slider1+=strlen(needle);
852 haystack = strcat(haystack, slider1);
853 where = strstr (slider, needle);
869 * Routine to see if a text string is matched by a wildcard pattern.
870 * Returns TRUE if the text is matched, or FALSE if it is not matched
871 * or if the pattern is invalid.
872 * * matches zero or more characters
873 * ? matches a single character
874 * [abc] matches 'a', 'b' or 'c'
875 * \c quotes character c
876 * Adapted from code written by Ingo Wilken, and
877 * then taken from sash, Copyright (c) 1999 by David I. Bell
878 * Permission is granted to use, distribute, or modify this source,
879 * provided that this copyright notice remains intact.
880 * Permission to distribute this code under the GPL has been granted.
883 check_wildcard_match(const char* text, const char* pattern)
885 const char* retryPat;
886 const char* retryText;
893 while (*text || *pattern)
907 while ((ch = *pattern++) != ']')
926 /* fall into next case */
940 /* fall into next case */
971 #if defined BB_DF | defined BB_MTAB
973 * Given a block device, find the mount table entry if that block device
976 * Given any other file (or directory), find the mount table entry for its
979 extern struct mntent *findMountPoint(const char *name, const char *table)
984 struct mntent *mountEntry;
986 if (stat(name, &s) != 0)
989 if ((s.st_mode & S_IFMT) == S_IFBLK)
990 mountDevice = s.st_rdev;
992 mountDevice = s.st_dev;
995 if ((mountTable = setmntent(table, "r")) == 0)
998 while ((mountEntry = getmntent(mountTable)) != 0) {
999 if (strcmp(name, mountEntry->mnt_dir) == 0
1000 || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */
1002 if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */
1004 if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */
1007 endmntent(mountTable);
1015 #if !defined BB_MTAB && (defined BB_MOUNT || defined BB_DF )
1016 extern void whine_if_fstab_is_missing()
1018 struct stat statBuf;
1019 if (stat("/etc/fstab", &statBuf) < 0)
1020 fprintf(stderr, "/etc/fstab file missing -- install one to name /dev/root.\n\n");
1025 #if defined BB_DD || defined BB_TAIL
1027 * Read a number with a possible multiplier.
1028 * Returns -1 if the number format is illegal.
1030 extern long getNum (const char *cp)
1034 if (!isDecimal (*cp))
1039 while (isDecimal (*cp))
1040 value = value * 10 + *cp++ - '0';
1074 #if defined BB_INIT || defined BB_HALT || defined BB_REBOOT
1076 #if ! defined BB_FEATURE_USE_PROCFS
1077 #error Sorry, I depend on the /proc filesystem right now.
1081 * This finds the pid of init (which is not always 1).
1082 * Currently, it's implemented by rummaging through the proc filesystem.
1086 * pid when init's pid is found.
1095 /* no need to opendir ;) */
1096 for (init_pid = 1; init_pid < 65536; init_pid++) {
1099 sprintf(filename, "/proc/%d/status", init_pid);
1100 status = fopen(filename, "r");
1101 if (!status) { continue; }
1102 fgets(buffer, 256, status);
1105 if ( (strstr(buffer, "init\n") != NULL )) {