| /* vi: set sw=4 ts=4: */ |
| /* |
| * Utility routines. |
| * |
| * Copyright (C) tons of folks. Tracking down who wrote what |
| * isn't something I'm going to worry about... If you wrote something |
| * here, please feel free to acknowledge your work. |
| * |
| * 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 |
| * |
| * Based in part on code from sash, Copyright (c) 1999 by David I. Bell |
| * Permission has been granted to redistribute this code under the GPL. |
| * |
| */ |
| |
| #include "busybox.h" |
| #if defined (BB_CHMOD_CHOWN_CHGRP) \ |
| || defined (BB_CP_MV) \ |
| || defined (BB_FIND) \ |
| || defined (BB_INSMOD) \ |
| || defined (BB_LS) \ |
| || defined (BB_RM) \ |
| || defined (BB_TAR) |
| /* same conditions as recursive_action */ |
| #define bb_need_name_too_long |
| #endif |
| #define bb_need_memory_exhausted |
| #define bb_need_full_version |
| #define BB_DECLARE_EXTERN |
| #include "messages.c" |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <dirent.h> |
| #include <time.h> |
| #include <utime.h> |
| #include <unistd.h> |
| #include <ctype.h> |
| #include <sys/ioctl.h> |
| #include <sys/utsname.h> /* for uname(2) */ |
| |
| /* Busybox mount uses either /proc/filesystems or /dev/mtab to get the |
| * list of available filesystems used for the -t auto option */ |
| #if defined BB_FEATURE_USE_PROCFS && defined BB_FEATURE_USE_DEVPS_PATCH |
| //#error Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again. |
| #error "Sorry, but busybox can't use both /proc and /dev/ps at the same time -- Pick one and try again." |
| #endif |
| |
| |
| #if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF |
| # if defined BB_MTAB |
| const char mtab_file[] = "/etc/mtab"; |
| # else |
| # if defined BB_FEATURE_USE_PROCFS |
| const char mtab_file[] = "/proc/mounts"; |
| # else |
| # if defined BB_FEATURE_USE_DEVPS_PATCH |
| const char mtab_file[] = "/dev/mtab"; |
| # else |
| # error With (BB_MOUNT||BB_UMOUNT||BB_DF) defined, you must define either BB_MTAB or ( BB_FEATURE_USE_PROCFS | BB_FEATURE_USE_DEVPS_PATCH) |
| # endif |
| # endif |
| # endif |
| #endif |
| |
| extern void usage(const char *usage) |
| { |
| fprintf(stderr, "%s\n\nUsage: %s\n", full_version, usage); |
| exit(EXIT_FAILURE); |
| } |
| |
| static void verror_msg(const char *s, va_list p) |
| { |
| fflush(stdout); |
| fprintf(stderr, "%s: ", applet_name); |
| vfprintf(stderr, s, p); |
| } |
| |
| extern void error_msg(const char *s, ...) |
| { |
| va_list p; |
| |
| va_start(p, s); |
| verror_msg(s, p); |
| va_end(p); |
| } |
| |
| extern void error_msg_and_die(const char *s, ...) |
| { |
| va_list p; |
| |
| va_start(p, s); |
| verror_msg(s, p); |
| va_end(p); |
| exit(EXIT_FAILURE); |
| } |
| |
| static void vperror_msg(const char *s, va_list p) |
| { |
| int err=errno; |
| if(s == 0) s = ""; |
| verror_msg(s, p); |
| if (*s) s = ": "; |
| fprintf(stderr, "%s%s\n", s, strerror(err)); |
| } |
| |
| extern void perror_msg(const char *s, ...) |
| { |
| va_list p; |
| |
| va_start(p, s); |
| vperror_msg(s, p); |
| va_end(p); |
| } |
| |
| extern void perror_msg_and_die(const char *s, ...) |
| { |
| va_list p; |
| |
| va_start(p, s); |
| vperror_msg(s, p); |
| va_end(p); |
| exit(EXIT_FAILURE); |
| } |
| |
| #if defined BB_INIT || defined BB_MKSWAP || defined BB_MOUNT || defined BB_NFSMOUNT |
| /* Returns kernel version encoded as major*65536 + minor*256 + patch, |
| * so, for example, to check if the kernel is greater than 2.2.11: |
| * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> } |
| */ |
| extern int get_kernel_revision(void) |
| { |
| struct utsname name; |
| int major = 0, minor = 0, patch = 0; |
| |
| if (uname(&name) == -1) { |
| perror_msg("cannot get system information"); |
| return (0); |
| } |
| major = atoi(strtok(name.release, ".")); |
| minor = atoi(strtok(NULL, ".")); |
| patch = atoi(strtok(NULL, ".")); |
| return major * 65536 + minor * 256 + patch; |
| } |
| #endif /* BB_INIT */ |
| |
| |
| |
| #if defined BB_FREE || defined BB_INIT || defined BB_UNAME || defined BB_UPTIME |
| _syscall1(int, sysinfo, struct sysinfo *, info); |
| #endif /* BB_INIT */ |
| |
| #if defined BB_MOUNT || defined BB_UMOUNT |
| |
| #ifndef __NR_umount2 |
| static const int __NR_umount2 = 52; |
| #endif |
| |
| /* Include our own version of <sys/mount.h>, since libc5 doesn't |
| * know about umount2 */ |
| extern _syscall1(int, umount, const char *, special_file); |
| extern _syscall2(int, umount2, const char *, special_file, int, flags); |
| extern _syscall5(int, mount, const char *, special_file, const char *, dir, |
| const char *, fstype, unsigned long int, rwflag, const void *, data); |
| #endif |
| |
| #if defined BB_INSMOD || defined BB_LSMOD |
| #ifndef __NR_query_module |
| static const int __NR_query_module = 167; |
| #endif |
| _syscall5(int, query_module, const char *, name, int, which, |
| void *, buf, size_t, bufsize, size_t*, ret); |
| #endif |
| |
| |
| #if defined (BB_CP_MV) || defined (BB_DU) |
| |
| #define HASH_SIZE 311 /* Should be prime */ |
| #define hash_inode(i) ((i) % HASH_SIZE) |
| |
| static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE]; |
| |
| /* |
| * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in |
| * `ino_dev_hashtable', else return 0 |
| * |
| * If NAME is a non-NULL pointer to a character pointer, and there is |
| * a match, then set *NAME to the value of the name slot in that |
| * bucket. |
| */ |
| int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name) |
| { |
| ino_dev_hashtable_bucket_t *bucket; |
| |
| bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)]; |
| while (bucket != NULL) { |
| if ((bucket->ino == statbuf->st_ino) && |
| (bucket->dev == statbuf->st_dev)) |
| { |
| if (name) *name = bucket->name; |
| return 1; |
| } |
| bucket = bucket->next; |
| } |
| return 0; |
| } |
| |
| /* Add statbuf to statbuf hash table */ |
| void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) |
| { |
| int i; |
| size_t s; |
| ino_dev_hashtable_bucket_t *bucket; |
| |
| i = hash_inode(statbuf->st_ino); |
| s = name ? strlen(name) : 0; |
| bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s); |
| bucket->ino = statbuf->st_ino; |
| bucket->dev = statbuf->st_dev; |
| if (name) |
| strcpy(bucket->name, name); |
| else |
| bucket->name[0] = '\0'; |
| bucket->next = ino_dev_hashtable[i]; |
| ino_dev_hashtable[i] = bucket; |
| } |
| |
| /* Clear statbuf hash table */ |
| void reset_ino_dev_hashtable(void) |
| { |
| int i; |
| ino_dev_hashtable_bucket_t *bucket; |
| |
| for (i = 0; i < HASH_SIZE; i++) { |
| while (ino_dev_hashtable[i] != NULL) { |
| bucket = ino_dev_hashtable[i]->next; |
| free(ino_dev_hashtable[i]); |
| ino_dev_hashtable[i] = bucket; |
| } |
| } |
| } |
| |
| #endif /* BB_CP_MV || BB_DU */ |
| |
| #if defined (BB_CP_MV) || defined (BB_DU) || defined (BB_LN) || defined (BB_DPKG_DEB) |
| /* |
| * Return TRUE if a fileName is a directory. |
| * Nonexistant files return FALSE. |
| */ |
| int is_directory(const char *fileName, const int followLinks, struct stat *statBuf) |
| { |
| int status; |
| int didMalloc = 0; |
| |
| if (statBuf == NULL) { |
| statBuf = (struct stat *)xmalloc(sizeof(struct stat)); |
| ++didMalloc; |
| } |
| |
| if (followLinks == TRUE) |
| status = stat(fileName, statBuf); |
| else |
| status = lstat(fileName, statBuf); |
| |
| if (status < 0 || !(S_ISDIR(statBuf->st_mode))) { |
| status = FALSE; |
| } |
| else status = TRUE; |
| |
| if (didMalloc) { |
| free(statBuf); |
| statBuf = NULL; |
| } |
| return status; |
| } |
| #endif |
| |
| #if defined BB_AR || defined BB_CP_MV |
| /* |
| * Copy chunksize bytes between two file descriptors |
| */ |
| int copy_file_chunk(int srcfd, int dstfd, size_t chunksize) |
| { |
| size_t size; |
| char buffer[BUFSIZ]; /* BUFSIZ is declared in stdio.h */ |
| |
| while (chunksize > 0) { |
| if (chunksize > BUFSIZ) |
| size = BUFSIZ; |
| else |
| size = chunksize; |
| if (full_write(dstfd, buffer, full_read(srcfd, buffer, size)) < size) |
| return(FALSE); |
| chunksize -= size; |
| } |
| return (TRUE); |
| } |
| #endif |
| |
| |
| #if defined (BB_CP_MV) |
| /* |
| * Copy one file to another, while possibly preserving its modes, times, and |
| * modes. Returns TRUE if successful, or FALSE on a failure with an error |
| * message output. (Failure is not indicated if attributes cannot be set.) |
| * -Erik Andersen |
| */ |
| int |
| copy_file(const char *srcName, const char *destName, |
| int setModes, int followLinks, int forceFlag) |
| { |
| int rfd; |
| int wfd; |
| int status; |
| struct stat srcStatBuf; |
| struct stat dstStatBuf; |
| struct utimbuf times; |
| |
| if (followLinks == TRUE) |
| status = stat(srcName, &srcStatBuf); |
| else |
| status = lstat(srcName, &srcStatBuf); |
| |
| if (status < 0) { |
| perror_msg("%s", srcName); |
| return FALSE; |
| } |
| |
| if (followLinks == TRUE) |
| status = stat(destName, &dstStatBuf); |
| else |
| status = lstat(destName, &dstStatBuf); |
| |
| if (status < 0 || forceFlag==TRUE) { |
| unlink(destName); |
| dstStatBuf.st_ino = -1; |
| dstStatBuf.st_dev = -1; |
| } |
| |
| if ((srcStatBuf.st_dev == dstStatBuf.st_dev) && |
| (srcStatBuf.st_ino == dstStatBuf.st_ino)) { |
| error_msg("Copying file \"%s\" to itself\n", srcName); |
| return FALSE; |
| } |
| |
| if (S_ISDIR(srcStatBuf.st_mode)) { |
| //fprintf(stderr, "copying directory %s to %s\n", srcName, destName); |
| /* Make sure the directory is writable */ |
| status = mkdir(destName, 0777777 ^ umask(0)); |
| if (status < 0 && errno != EEXIST) { |
| perror_msg("%s", destName); |
| return FALSE; |
| } |
| } else if (S_ISLNK(srcStatBuf.st_mode)) { |
| char link_val[BUFSIZ + 1]; |
| int link_size; |
| |
| //fprintf(stderr, "copying link %s to %s\n", srcName, destName); |
| /* Warning: This could possibly truncate silently, to BUFSIZ chars */ |
| link_size = readlink(srcName, &link_val[0], BUFSIZ); |
| if (link_size < 0) { |
| perror_msg("%s", srcName); |
| return FALSE; |
| } |
| link_val[link_size] = '\0'; |
| status = symlink(link_val, destName); |
| if (status < 0) { |
| perror_msg("%s", destName); |
| return FALSE; |
| } |
| #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1) |
| if (setModes == TRUE) { |
| /* Try to set owner, but fail silently like GNU cp */ |
| lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid); |
| } |
| #endif |
| return TRUE; |
| } else if (S_ISFIFO(srcStatBuf.st_mode)) { |
| //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName); |
| if (mkfifo(destName, 0644) < 0) { |
| perror_msg("%s", destName); |
| return FALSE; |
| } |
| } else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode) |
| || S_ISSOCK(srcStatBuf.st_mode)) { |
| //fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName); |
| if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) { |
| perror_msg("%s", destName); |
| return FALSE; |
| } |
| } else if (S_ISREG(srcStatBuf.st_mode)) { |
| //fprintf(stderr, "copying regular file %s to %s\n", srcName, destName); |
| rfd = open(srcName, O_RDONLY); |
| if (rfd < 0) { |
| perror_msg("%s", srcName); |
| return FALSE; |
| } |
| |
| wfd = open(destName, O_WRONLY | O_CREAT | O_TRUNC, |
| srcStatBuf.st_mode); |
| if (wfd < 0) { |
| perror_msg("%s", destName); |
| close(rfd); |
| return FALSE; |
| } |
| |
| if (copy_file_chunk(rfd, wfd, srcStatBuf.st_size)==FALSE) |
| goto error_exit; |
| |
| close(rfd); |
| if (close(wfd) < 0) { |
| return FALSE; |
| } |
| } |
| |
| if (setModes == TRUE) { |
| /* This is fine, since symlinks never get here */ |
| if (chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0) |
| perror_msg_and_die("%s", destName); |
| if (chmod(destName, srcStatBuf.st_mode) < 0) |
| perror_msg_and_die("%s", destName); |
| times.actime = srcStatBuf.st_atime; |
| times.modtime = srcStatBuf.st_mtime; |
| if (utime(destName, ×) < 0) |
| perror_msg_and_die("%s", destName); |
| } |
| |
| return TRUE; |
| |
| error_exit: |
| perror_msg("%s", destName); |
| close(rfd); |
| close(wfd); |
| |
| return FALSE; |
| } |
| #endif /* BB_CP_MV */ |
| |
| |
| |
| #if defined BB_TAR || defined BB_LS ||defined BB_AR |
| |
| #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f) |
| #define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)]) |
| |
| /* The special bits. If set, display SMODE0/1 instead of MODE0/1 */ |
| static const mode_t SBIT[] = { |
| 0, 0, S_ISUID, |
| 0, 0, S_ISGID, |
| 0, 0, S_ISVTX |
| }; |
| |
| /* The 9 mode bits to test */ |
| static const mode_t MBIT[] = { |
| S_IRUSR, S_IWUSR, S_IXUSR, |
| S_IRGRP, S_IWGRP, S_IXGRP, |
| S_IROTH, S_IWOTH, S_IXOTH |
| }; |
| |
| static const char MODE1[] = "rwxrwxrwx"; |
| static const char MODE0[] = "---------"; |
| static const char SMODE1[] = "..s..s..t"; |
| static const char SMODE0[] = "..S..S..T"; |
| |
| /* |
| * Return the standard ls-like mode string from a file mode. |
| * This is static and so is overwritten on each call. |
| */ |
| const char *mode_string(int mode) |
| { |
| static char buf[12]; |
| |
| int i; |
| |
| buf[0] = TYPECHAR(mode); |
| for (i = 0; i < 9; i++) { |
| if (mode & SBIT[i]) |
| buf[i + 1] = (mode & MBIT[i]) ? SMODE1[i] : SMODE0[i]; |
| else |
| buf[i + 1] = (mode & MBIT[i]) ? MODE1[i] : MODE0[i]; |
| } |
| return buf; |
| } |
| #endif /* BB_TAR || BB_LS */ |
| |
| |
| #if defined BB_TAR || defined BB_AR |
| /* |
| * Return the standard ls-like time string from a time_t |
| * This is static and so is overwritten on each call. |
| */ |
| const char *time_string(time_t timeVal) |
| { |
| time_t now; |
| char *str; |
| static char buf[26]; |
| |
| time(&now); |
| |
| str = ctime(&timeVal); |
| |
| strcpy(buf, &str[4]); |
| buf[12] = '\0'; |
| |
| if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) { |
| strcpy(&buf[7], &str[20]); |
| buf[11] = '\0'; |
| } |
| |
| return buf; |
| } |
| #endif /* BB_TAR || BB_AR */ |
| |
| #if defined BB_DD || defined BB_NC || defined BB_TAIL || defined BB_TAR || defined BB_AR || defined BB_CP_MV |
| /* |
| * Write all of the supplied buffer out to a file. |
| * This does multiple writes as necessary. |
| * Returns the amount written, or -1 on an error. |
| */ |
| int full_write(int fd, const char *buf, int len) |
| { |
| int cc; |
| int total; |
| |
| total = 0; |
| |
| while (len > 0) { |
| cc = write(fd, buf, len); |
| |
| if (cc < 0) |
| return -1; |
| |
| buf += cc; |
| total += cc; |
| len -= cc; |
| } |
| |
| return total; |
| } |
| #endif |
| |
| #if defined BB_AR || defined BB_CP_MV || defined BB_SH || defined BB_TAR |
| /* |
| * Read all of the supplied buffer from a file. |
| * This does multiple reads as necessary. |
| * Returns the amount read, or -1 on an error. |
| * A short read is returned on an end of file. |
| */ |
| int full_read(int fd, char *buf, int len) |
| { |
| int cc; |
| int total; |
| |
| total = 0; |
| |
| while (len > 0) { |
| cc = read(fd, buf, len); |
| |
| if (cc < 0) |
| return -1; |
| |
| if (cc == 0) |
| break; |
| |
| buf += cc; |
| total += cc; |
| len -= cc; |
| } |
| |
| return total; |
| } |
| #endif /* BB_TAR || BB_TAIL || BB_AR || BB_SH */ |
| |
| |
| #if defined (BB_CHMOD_CHOWN_CHGRP) \ |
| || defined (BB_CP_MV) \ |
| || defined (BB_FIND) \ |
| || defined (BB_INSMOD) \ |
| || defined (BB_LS) \ |
| || defined (BB_RM) \ |
| || defined (BB_TAR) |
| |
| /* |
| * Walk down all the directories under the specified |
| * location, and do something (something specified |
| * by the fileAction and dirAction function pointers). |
| * |
| * Unfortunately, while nftw(3) could replace this and reduce |
| * code size a bit, nftw() wasn't supported before GNU libc 2.1, |
| * and so isn't sufficiently portable to take over since glibc2.1 |
| * is so stinking huge. |
| */ |
| int recursive_action(const char *fileName, |
| int recurse, int followLinks, int depthFirst, |
| int (*fileAction) (const char *fileName, |
| struct stat * statbuf, |
| void* userData), |
| int (*dirAction) (const char *fileName, |
| struct stat * statbuf, |
| void* userData), |
| void* userData) |
| { |
| int status; |
| struct stat statbuf; |
| struct dirent *next; |
| |
| if (followLinks == TRUE) |
| status = stat(fileName, &statbuf); |
| else |
| status = lstat(fileName, &statbuf); |
| |
| if (status < 0) { |
| #ifdef BB_DEBUG_PRINT_SCAFFOLD |
| fprintf(stderr, |
| "status=%d followLinks=%d TRUE=%d\n", |
| status, followLinks, TRUE); |
| #endif |
| perror_msg("%s", fileName); |
| return FALSE; |
| } |
| |
| if ((followLinks == FALSE) && (S_ISLNK(statbuf.st_mode))) { |
| if (fileAction == NULL) |
| return TRUE; |
| else |
| return fileAction(fileName, &statbuf, userData); |
| } |
| |
| if (recurse == FALSE) { |
| if (S_ISDIR(statbuf.st_mode)) { |
| if (dirAction != NULL) |
| return (dirAction(fileName, &statbuf, userData)); |
| else |
| return TRUE; |
| } |
| } |
| |
| if (S_ISDIR(statbuf.st_mode)) { |
| DIR *dir; |
| |
| if (dirAction != NULL && depthFirst == FALSE) { |
| status = dirAction(fileName, &statbuf, userData); |
| if (status == FALSE) { |
| perror_msg("%s", fileName); |
| return FALSE; |
| } else if (status == SKIP) |
| return TRUE; |
| } |
| dir = opendir(fileName); |
| if (!dir) { |
| perror_msg("%s", fileName); |
| return FALSE; |
| } |
| while ((next = readdir(dir)) != NULL) { |
| char nextFile[BUFSIZ + 1]; |
| |
| if ((strcmp(next->d_name, "..") == 0) |
| || (strcmp(next->d_name, ".") == 0)) { |
| continue; |
| } |
| if (strlen(fileName) + strlen(next->d_name) + 1 > BUFSIZ) { |
| error_msg(name_too_long); |
| return FALSE; |
| } |
| memset(nextFile, 0, sizeof(nextFile)); |
| sprintf(nextFile, "%s/%s", fileName, next->d_name); |
| status = |
| recursive_action(nextFile, TRUE, followLinks, depthFirst, |
| fileAction, dirAction, userData); |
| if (status == FALSE) { |
| closedir(dir); |
| return FALSE; |
| } |
| } |
| status = closedir(dir); |
| if (status < 0) { |
| perror_msg("%s", fileName); |
| return FALSE; |
| } |
| if (dirAction != NULL && depthFirst == TRUE) { |
| status = dirAction(fileName, &statbuf, userData); |
| if (status == FALSE) { |
| perror_msg("%s", fileName); |
| return FALSE; |
| } |
| } |
| } else { |
| if (fileAction == NULL) |
| return TRUE; |
| else |
| return fileAction(fileName, &statbuf, userData); |
| } |
| return TRUE; |
| } |
| |
| #endif /* BB_CHMOD_CHOWN_CHGRP || BB_CP_MV || BB_FIND || BB_LS || BB_INSMOD */ |
| |
| |
| |
| #if defined (BB_TAR) || defined (BB_MKDIR) |
| /* |
| * Attempt to create the directories along the specified path, except for |
| * the final component. The mode is given for the final directory only, |
| * while all previous ones get default protections. Errors are not reported |
| * here, as failures to restore files can be reported later. |
| */ |
| extern int create_path(const char *name, int mode) |
| { |
| char *cp; |
| char *cpOld; |
| char buf[BUFSIZ + 1]; |
| int retVal = 0; |
| |
| strcpy(buf, name); |
| for (cp = buf; *cp == '/'; cp++); |
| cp = strchr(cp, '/'); |
| while (cp) { |
| cpOld = cp; |
| cp = strchr(cp + 1, '/'); |
| *cpOld = '\0'; |
| retVal = mkdir(buf, cp ? 0777 : mode); |
| if (retVal != 0 && errno != EEXIST) { |
| perror_msg("%s", buf); |
| return FALSE; |
| } |
| *cpOld = '/'; |
| } |
| return TRUE; |
| } |
| #endif /* BB_TAR || BB_MKDIR */ |
| |
| |
| |
| #if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR) \ |
| || defined (BB_MKFIFO) || defined (BB_MKNOD) || defined (BB_AR) |
| /* [ugoa]{+|-|=}[rwxst] */ |
| |
| |
| |
| extern int parse_mode(const char *s, mode_t * theMode) |
| { |
| mode_t andMode = |
| |
| S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; |
| mode_t orMode = 0; |
| mode_t mode = 0; |
| mode_t groups = 0; |
| char type; |
| char c; |
| |
| if (s==NULL) |
| return (FALSE); |
| |
| do { |
| for (;;) { |
| switch (c = *s++) { |
| case '\0': |
| return -1; |
| case 'u': |
| groups |= S_ISUID | S_IRWXU; |
| continue; |
| case 'g': |
| groups |= S_ISGID | S_IRWXG; |
| continue; |
| case 'o': |
| groups |= S_IRWXO; |
| continue; |
| case 'a': |
| groups |= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; |
| continue; |
| case '+': |
| case '=': |
| case '-': |
| type = c; |
| if (groups == 0) /* The default is "all" */ |
| groups |= |
| S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; |
| break; |
| default: |
| if (isdigit(c) && c >= '0' && c <= '7' && |
| mode == 0 && groups == 0) { |
| *theMode = strtol(--s, NULL, 8); |
| return (TRUE); |
| } else |
| return (FALSE); |
| } |
| break; |
| } |
| |
| while ((c = *s++) != '\0') { |
| switch (c) { |
| case ',': |
| break; |
| case 'r': |
| mode |= S_IRUSR | S_IRGRP | S_IROTH; |
| continue; |
| case 'w': |
| mode |= S_IWUSR | S_IWGRP | S_IWOTH; |
| continue; |
| case 'x': |
| mode |= S_IXUSR | S_IXGRP | S_IXOTH; |
| continue; |
| case 's': |
| mode |= S_IXGRP | S_ISUID | S_ISGID; |
| continue; |
| case 't': |
| mode |= 0; |
| continue; |
| default: |
| *theMode &= andMode; |
| *theMode |= orMode; |
| return (TRUE); |
| } |
| break; |
| } |
| switch (type) { |
| case '=': |
| andMode &= ~(groups); |
| /* fall through */ |
| case '+': |
| orMode |= mode & groups; |
| break; |
| case '-': |
| andMode &= ~(mode & groups); |
| orMode &= andMode; |
| break; |
| } |
| } while (c == ','); |
| *theMode &= andMode; |
| *theMode |= orMode; |
| return (TRUE); |
| } |
| |
| |
| #endif |
| /* BB_CHMOD_CHOWN_CHGRP || BB_MKDIR || BB_MKFIFO || BB_MKNOD */ |
| |
| |
| |
| |
| |
| #if defined BB_CHMOD_CHOWN_CHGRP || defined BB_PS || defined BB_LS \ |
| || defined BB_TAR || defined BB_ID || defined BB_LOGGER \ |
| || defined BB_LOGNAME || defined BB_WHOAMI || defined BB_SH |
| |
| /* This parses entries in /etc/passwd and /etc/group. This is desirable |
| * for BusyBox, since we want to avoid using the glibc NSS stuff, which |
| * increases target size and is often not needed or wanted for embedded |
| * systems. |
| * |
| * /etc/passwd entries look like this: |
| * root:x:0:0:root:/root:/bin/bash |
| * and /etc/group entries look like this: |
| * root:x:0: |
| * |
| * This uses buf as storage to hold things. |
| * |
| */ |
| unsigned long my_getid(const char *filename, char *name, long id, long *gid) |
| { |
| FILE *file; |
| char *rname, *start, *end, buf[128]; |
| long rid; |
| long rgid = 0; |
| |
| file = fopen(filename, "r"); |
| if (file == NULL) { |
| /* Do not complain. It is ok for /etc/passwd and |
| * friends to be missing... */ |
| return (-1); |
| } |
| |
| while (fgets(buf, 128, file) != NULL) { |
| if (buf[0] == '#') |
| continue; |
| |
| /* username/group name */ |
| start = buf; |
| end = strchr(start, ':'); |
| if (end == NULL) |
| continue; |
| *end = '\0'; |
| rname = start; |
| |
| /* password */ |
| start = end + 1; |
| end = strchr(start, ':'); |
| if (end == NULL) |
| continue; |
| |
| /* uid in passwd, gid in group */ |
| start = end + 1; |
| rid = (unsigned long) strtol(start, &end, 10); |
| if (end == start) |
| continue; |
| |
| /* gid in passwd */ |
| start = end + 1; |
| rgid = (unsigned long) strtol(start, &end, 10); |
| |
| if (name) { |
| if (0 == strcmp(rname, name)) { |
| if (gid) *gid = rgid; |
| fclose(file); |
| return (rid); |
| } |
| } |
| if (id != -1 && id == rid) { |
| strncpy(name, rname, 8); |
| name[8]='\0'; |
| if (gid) *gid = rgid; |
| fclose(file); |
| return (TRUE); |
| } |
| } |
| fclose(file); |
| return (-1); |
| } |
| |
| /* returns a uid given a username */ |
| long my_getpwnam(char *name) |
| { |
| return my_getid("/etc/passwd", name, -1, NULL); |
| } |
| |
| /* returns a gid given a group name */ |
| long my_getgrnam(char *name) |
| { |
| return my_getid("/etc/group", name, -1, NULL); |
| } |
| |
| /* gets a username given a uid */ |
| void my_getpwuid(char *name, long uid) |
| { |
| name[0] = '\0'; |
| my_getid("/etc/passwd", name, uid, NULL); |
| } |
| |
| /* gets a groupname given a gid */ |
| void my_getgrgid(char *group, long gid) |
| { |
| group[0] = '\0'; |
| my_getid("/etc/group", group, gid, NULL); |
| } |
| |
| #if defined BB_ID |
| /* gets a gid given a user name */ |
| long my_getpwnamegid(char *name) |
| { |
| long gid; |
| my_getid("/etc/passwd", name, -1, &gid); |
| return gid; |
| } |
| #endif |
| |
| #endif |
| /* BB_CHMOD_CHOWN_CHGRP || BB_PS || BB_LS || BB_TAR \ |
| || BB_ID || BB_LOGGER || BB_LOGNAME || BB_WHOAMI */ |
| |
| |
| #if (defined BB_CHVT) || (defined BB_DEALLOCVT) || (defined BB_SETKEYCODES) |
| |
| /* From <linux/kd.h> */ |
| static const int KDGKBTYPE = 0x4B33; /* get keyboard type */ |
| static const int KB_84 = 0x01; |
| static const int KB_101 = 0x02; /* this is what we always answer */ |
| |
| int is_a_console(int fd) |
| { |
| char arg; |
| |
| arg = 0; |
| return (ioctl(fd, KDGKBTYPE, &arg) == 0 |
| && ((arg == KB_101) || (arg == KB_84))); |
| } |
| |
| static int open_a_console(char *fnam) |
| { |
| int fd; |
| |
| /* try read-only */ |
| fd = open(fnam, O_RDWR); |
| |
| /* if failed, try read-only */ |
| if (fd < 0 && errno == EACCES) |
| fd = open(fnam, O_RDONLY); |
| |
| /* if failed, try write-only */ |
| if (fd < 0 && errno == EACCES) |
| fd = open(fnam, O_WRONLY); |
| |
| /* if failed, fail */ |
| if (fd < 0) |
| return -1; |
| |
| /* if not a console, fail */ |
| if (!is_a_console(fd)) { |
| close(fd); |
| return -1; |
| } |
| |
| /* success */ |
| return fd; |
| } |
| |
| /* |
| * Get an fd for use with kbd/console ioctls. |
| * We try several things because opening /dev/console will fail |
| * if someone else used X (which does a chown on /dev/console). |
| * |
| * if tty_name is non-NULL, try this one instead. |
| */ |
| |
| int get_console_fd(char *tty_name) |
| { |
| int fd; |
| |
| if (tty_name) { |
| if (-1 == (fd = open_a_console(tty_name))) |
| return -1; |
| else |
| return fd; |
| } |
| |
| fd = open_a_console("/dev/tty"); |
| if (fd >= 0) |
| return fd; |
| |
| fd = open_a_console("/dev/tty0"); |
| if (fd >= 0) |
| return fd; |
| |
| fd = open_a_console("/dev/console"); |
| if (fd >= 0) |
| return fd; |
| |
| for (fd = 0; fd < 3; fd++) |
| if (is_a_console(fd)) |
| return fd; |
| |
| error_msg("Couldnt get a file descriptor referring to the console\n"); |
| return -1; /* total failure */ |
| } |
| |
| |
| #endif /* BB_CHVT || BB_DEALLOCVT || BB_SETKEYCODES */ |
| |
| |
| #if defined BB_FIND || defined BB_INSMOD |
| /* |
| * Routine to see if a text string is matched by a wildcard pattern. |
| * Returns TRUE if the text is matched, or FALSE if it is not matched |
| * or if the pattern is invalid. |
| * * matches zero or more characters |
| * ? matches a single character |
| * [abc] matches 'a', 'b' or 'c' |
| * \c quotes character c |
| * Adapted from code written by Ingo Wilken, and |
| * then taken from sash, Copyright (c) 1999 by David I. Bell |
| * Permission is granted to use, distribute, or modify this source, |
| * provided that this copyright notice remains intact. |
| * Permission to distribute this code under the GPL has been granted. |
| */ |
| extern int check_wildcard_match(const char *text, const char *pattern) |
| { |
| const char *retryPat; |
| const char *retryText; |
| int ch; |
| int found; |
| int len; |
| |
| retryPat = NULL; |
| retryText = NULL; |
| |
| while (*text || *pattern) { |
| ch = *pattern++; |
| |
| switch (ch) { |
| case '*': |
| retryPat = pattern; |
| retryText = text; |
| break; |
| |
| case '[': |
| found = FALSE; |
| |
| while ((ch = *pattern++) != ']') { |
| if (ch == '\\') |
| ch = *pattern++; |
| |
| if (ch == '\0') |
| return FALSE; |
| |
| if (*text == ch) |
| found = TRUE; |
| } |
| len=strlen(text); |
| if (found == FALSE && len!=0) { |
| return FALSE; |
| } |
| if (found == TRUE) { |
| if (strlen(pattern)==0 && len==1) { |
| return TRUE; |
| } |
| if (len!=0) { |
| text++; |
| continue; |
| } |
| } |
| |
| /* fall into next case */ |
| |
| case '?': |
| if (*text++ == '\0') |
| return FALSE; |
| |
| break; |
| |
| case '\\': |
| ch = *pattern++; |
| |
| if (ch == '\0') |
| return FALSE; |
| |
| /* fall into next case */ |
| |
| default: |
| if (*text == ch) { |
| if (*text) |
| text++; |
| break; |
| } |
| |
| if (*text) { |
| pattern = retryPat; |
| text = ++retryText; |
| break; |
| } |
| |
| return FALSE; |
| } |
| |
| if (pattern == NULL) |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| #endif /* BB_FIND || BB_INSMOD */ |
| |
| |
| |
| |
| #if defined BB_DF || defined BB_MTAB |
| /* |
| * Given a block device, find the mount table entry if that block device |
| * is mounted. |
| * |
| * Given any other file (or directory), find the mount table entry for its |
| * filesystem. |
| */ |
| extern struct mntent *find_mount_point(const char *name, const char *table) |
| { |
| struct stat s; |
| dev_t mountDevice; |
| FILE *mountTable; |
| struct mntent *mountEntry; |
| |
| if (stat(name, &s) != 0) |
| return 0; |
| |
| if ((s.st_mode & S_IFMT) == S_IFBLK) |
| mountDevice = s.st_rdev; |
| else |
| mountDevice = s.st_dev; |
| |
| |
| if ((mountTable = setmntent(table, "r")) == 0) |
| return 0; |
| |
| while ((mountEntry = getmntent(mountTable)) != 0) { |
| if (strcmp(name, mountEntry->mnt_dir) == 0 |
| || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */ |
| break; |
| if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */ |
| break; |
| if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */ |
| break; |
| } |
| endmntent(mountTable); |
| return mountEntry; |
| } |
| #endif /* BB_DF || BB_MTAB */ |
| |
| #if defined BB_INIT || defined BB_SYSLOGD |
| /* try to open up the specified device */ |
| extern int device_open(char *device, int mode) |
| { |
| int m, f, fd = -1; |
| |
| m = mode | O_NONBLOCK; |
| |
| /* Retry up to 5 times */ |
| for (f = 0; f < 5; f++) |
| if ((fd = open(device, m, 0600)) >= 0) |
| break; |
| if (fd < 0) |
| return fd; |
| /* Reset original flags. */ |
| if (m != mode) |
| fcntl(fd, F_SETFL, mode); |
| return fd; |
| } |
| #endif /* BB_INIT BB_SYSLOGD */ |
| |
| |
| #if defined BB_KILLALL || ( defined BB_FEATURE_LINUXRC && ( defined BB_HALT || defined BB_REBOOT || defined BB_POWEROFF )) |
| #ifdef BB_FEATURE_USE_DEVPS_PATCH |
| #include <linux/devps.h> /* For Erik's nifty devps device driver */ |
| #endif |
| |
| #if defined BB_FEATURE_USE_DEVPS_PATCH |
| /* find_pid_by_name() |
| * |
| * This finds the pid of the specified process, |
| * by using the /dev/ps device driver. |
| * |
| * Returns a list of all matching PIDs |
| */ |
| extern pid_t* find_pid_by_name( char* pidName) |
| { |
| int fd, i, j; |
| char device[] = "/dev/ps"; |
| pid_t num_pids; |
| pid_t* pid_array = NULL; |
| pid_t* pidList=NULL; |
| |
| /* open device */ |
| fd = open(device, O_RDONLY); |
| if (fd < 0) |
| perror_msg_and_die("open failed for `%s'", device); |
| |
| /* Find out how many processes there are */ |
| if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0) |
| perror_msg_and_die("\nDEVPS_GET_PID_LIST"); |
| |
| /* Allocate some memory -- grab a few extras just in case |
| * some new processes start up while we wait. The kernel will |
| * just ignore any extras if we give it too many, and will trunc. |
| * the list if we give it too few. */ |
| pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t)); |
| pid_array[0] = num_pids+10; |
| |
| /* Now grab the pid list */ |
| if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0) |
| perror_msg_and_die("\nDEVPS_GET_PID_LIST"); |
| |
| /* Now search for a match */ |
| for (i=1, j=0; i<pid_array[0] ; i++) { |
| char* p; |
| struct pid_info info; |
| |
| info.pid = pid_array[i]; |
| if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0) |
| perror_msg_and_die("\nDEVPS_GET_PID_INFO"); |
| |
| /* Make sure we only match on the process name */ |
| p=info.command_line+1; |
| while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) { |
| (p)++; |
| } |
| if (isspace(*(p))) |
| *p='\0'; |
| |
| if ((strstr(info.command_line, pidName) != NULL) |
| && (strlen(pidName) == strlen(info.command_line))) { |
| pidList=xrealloc( pidList, sizeof(pid_t) * (j+2)); |
| pidList[j++]=info.pid; |
| } |
| } |
| if (pidList) |
| pidList[j]=0; |
| |
| /* Free memory */ |
| free( pid_array); |
| |
| /* close device */ |
| if (close (fd) != 0) |
| perror_msg_and_die("close failed for `%s'", device); |
| |
| return pidList; |
| } |
| #else /* BB_FEATURE_USE_DEVPS_PATCH */ |
| #if ! defined BB_FEATURE_USE_PROCFS |
| #error Sorry, I depend on the /proc filesystem right now. |
| #endif |
| |
| /* find_pid_by_name() |
| * |
| * This finds the pid of the specified process. |
| * Currently, it's implemented by rummaging through |
| * the proc filesystem. |
| * |
| * Returns a list of all matching PIDs |
| */ |
| extern pid_t* find_pid_by_name( char* pidName) |
| { |
| DIR *dir; |
| struct dirent *next; |
| pid_t* pidList=NULL; |
| int i=0; |
| |
| dir = opendir("/proc"); |
| if (!dir) |
| perror_msg_and_die("Cannot open /proc"); |
| |
| while ((next = readdir(dir)) != NULL) { |
| FILE *status; |
| char filename[256]; |
| char buffer[256]; |
| |
| /* If it isn't a number, we don't want it */ |
| if (!isdigit(*next->d_name)) |
| continue; |
| |
| sprintf(filename, "/proc/%s/cmdline", next->d_name); |
| status = fopen(filename, "r"); |
| if (!status) { |
| continue; |
| } |
| fgets(buffer, 256, status); |
| fclose(status); |
| |
| if (strstr(get_last_path_component(buffer), pidName) != NULL) { |
| pidList=xrealloc( pidList, sizeof(pid_t) * (i+2)); |
| pidList[i++]=strtol(next->d_name, NULL, 0); |
| } |
| } |
| |
| if (pidList) |
| pidList[i]=0; |
| return pidList; |
| } |
| #endif /* BB_FEATURE_USE_DEVPS_PATCH */ |
| #endif /* BB_KILLALL || ( BB_FEATURE_LINUXRC && ( BB_HALT || BB_REBOOT || BB_POWEROFF )) */ |
| |
| #ifndef DMALLOC |
| /* this should really be farmed out to libbusybox.a */ |
| extern void *xmalloc(size_t size) |
| { |
| void *ptr = malloc(size); |
| |
| if (!ptr) |
| error_msg_and_die(memory_exhausted); |
| return ptr; |
| } |
| |
| extern void *xrealloc(void *old, size_t size) |
| { |
| void *ptr = realloc(old, size); |
| if (!ptr) |
| error_msg_and_die(memory_exhausted); |
| return ptr; |
| } |
| |
| extern void *xcalloc(size_t nmemb, size_t size) |
| { |
| void *ptr = calloc(nmemb, size); |
| if (!ptr) |
| error_msg_and_die(memory_exhausted); |
| return ptr; |
| } |
| #endif |
| |
| #if defined BB_NFSMOUNT || defined BB_LS || defined BB_SH || defined BB_WGET || \ |
| defined BB_DPKG_DEB || defined BB_TAR |
| # ifndef DMALLOC |
| extern char * xstrdup (const char *s) { |
| char *t; |
| |
| if (s == NULL) |
| return NULL; |
| |
| t = strdup (s); |
| |
| if (t == NULL) |
| error_msg_and_die(memory_exhausted); |
| |
| return t; |
| } |
| # endif |
| #endif |
| |
| #if defined BB_NFSMOUNT |
| extern char * xstrndup (const char *s, int n) { |
| char *t; |
| |
| if (s == NULL) |
| error_msg_and_die("xstrndup bug\n"); |
| |
| t = xmalloc(n+1); |
| strncpy(t,s,n); |
| t[n] = 0; |
| |
| return t; |
| } |
| #endif |
| |
| |
| #if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT) |
| extern int vdprintf(int d, const char *format, va_list ap) |
| { |
| char buf[BUF_SIZE]; |
| int len; |
| |
| len = vsprintf(buf, format, ap); |
| return write(d, buf, len); |
| } |
| #endif /* BB_SYSLOGD */ |
| |
| |
| #if defined BB_FEATURE_MOUNT_LOOP |
| #include <fcntl.h> |
| #include "loop.h" /* Pull in loop device support */ |
| |
| extern int del_loop(const char *device) |
| { |
| int fd; |
| |
| if ((fd = open(device, O_RDONLY)) < 0) { |
| perror_msg("%s", device); |
| return (FALSE); |
| } |
| if (ioctl(fd, LOOP_CLR_FD, 0) < 0) { |
| perror_msg("ioctl: LOOP_CLR_FD"); |
| return (FALSE); |
| } |
| close(fd); |
| return (TRUE); |
| } |
| |
| extern int set_loop(const char *device, const char *file, int offset, |
| int *loopro) |
| { |
| struct loop_info loopinfo; |
| int fd, ffd, mode; |
| |
| mode = *loopro ? O_RDONLY : O_RDWR; |
| if ((ffd = open(file, mode)) < 0 && !*loopro |
| && (errno != EROFS || (ffd = open(file, mode = O_RDONLY)) < 0)) { |
| perror_msg("%s", file); |
| return 1; |
| } |
| if ((fd = open(device, mode)) < 0) { |
| close(ffd); |
| perror_msg("%s", device); |
| return 1; |
| } |
| *loopro = (mode == O_RDONLY); |
| |
| memset(&loopinfo, 0, sizeof(loopinfo)); |
| strncpy(loopinfo.lo_name, file, LO_NAME_SIZE); |
| loopinfo.lo_name[LO_NAME_SIZE - 1] = 0; |
| |
| loopinfo.lo_offset = offset; |
| |
| loopinfo.lo_encrypt_key_size = 0; |
| if (ioctl(fd, LOOP_SET_FD, ffd) < 0) { |
| perror_msg("ioctl: LOOP_SET_FD"); |
| close(fd); |
| close(ffd); |
| return 1; |
| } |
| if (ioctl(fd, LOOP_SET_STATUS, &loopinfo) < 0) { |
| (void) ioctl(fd, LOOP_CLR_FD, 0); |
| perror_msg("ioctl: LOOP_SET_STATUS"); |
| close(fd); |
| close(ffd); |
| return 1; |
| } |
| close(fd); |
| close(ffd); |
| return 0; |
| } |
| |
| extern char *find_unused_loop_device(void) |
| { |
| char dev[20]; |
| int i, fd; |
| struct stat statbuf; |
| struct loop_info loopinfo; |
| |
| for (i = 0; i <= 7; i++) { |
| sprintf(dev, "/dev/loop%d", i); |
| if (stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) { |
| if ((fd = open(dev, O_RDONLY)) >= 0) { |
| if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) == -1) { |
| if (errno == ENXIO) { /* probably free */ |
| close(fd); |
| return strdup(dev); |
| } |
| } |
| close(fd); |
| } |
| } |
| } |
| return NULL; |
| } |
| #endif /* BB_FEATURE_MOUNT_LOOP */ |
| |
| #if defined BB_MOUNT || defined BB_DF || ( defined BB_UMOUNT && ! defined BB_MTAB) |
| extern int find_real_root_device_name(char* name) |
| { |
| DIR *dir; |
| struct dirent *entry; |
| struct stat statBuf, rootStat; |
| char fileName[BUFSIZ]; |
| |
| if (stat("/", &rootStat) != 0) { |
| error_msg("could not stat '/'\n"); |
| return( FALSE); |
| } |
| |
| dir = opendir("/dev"); |
| if (!dir) { |
| error_msg("could not open '/dev'\n"); |
| return( FALSE); |
| } |
| |
| while((entry = readdir(dir)) != NULL) { |
| |
| /* Must skip ".." since that is "/", and so we |
| * would get a false positive on ".." */ |
| if (strcmp(entry->d_name, "..") == 0) |
| continue; |
| |
| snprintf( fileName, strlen(name)+1, "/dev/%s", entry->d_name); |
| |
| if (stat(fileName, &statBuf) != 0) |
| continue; |
| /* Some char devices have the same dev_t as block |
| * devices, so make sure this is a block device */ |
| if (! S_ISBLK(statBuf.st_mode)) |
| continue; |
| if (statBuf.st_rdev == rootStat.st_rdev) { |
| strcpy(name, fileName); |
| return ( TRUE); |
| } |
| } |
| |
| return( FALSE); |
| } |
| #endif |
| |
| |
| /* get_line_from_file() - This function reads an entire line from a text file |
| * up to a newline. It returns a malloc'ed char * which must be stored and |
| * free'ed by the caller. */ |
| extern char *get_line_from_file(FILE *file) |
| { |
| static const int GROWBY = 80; /* how large we will grow strings by */ |
| |
| int ch; |
| int idx = 0; |
| char *linebuf = NULL; |
| int linebufsz = 0; |
| |
| while (1) { |
| ch = fgetc(file); |
| if (ch == EOF) |
| break; |
| /* grow the line buffer as necessary */ |
| while (idx > linebufsz-2) |
| linebuf = xrealloc(linebuf, linebufsz += GROWBY); |
| linebuf[idx++] = (char)ch; |
| if ((char)ch == '\n') |
| break; |
| } |
| |
| if (idx == 0) |
| return NULL; |
| |
| linebuf[idx] = 0; |
| return linebuf; |
| } |
| |
| #if defined BB_CAT |
| extern void print_file(FILE *file) |
| { |
| int c; |
| |
| while ((c = getc(file)) != EOF) |
| putc(c, stdout); |
| fclose(file); |
| fflush(stdout); |
| } |
| |
| extern int print_file_by_name(char *filename) |
| { |
| FILE *file; |
| if ((file = wfopen(filename, "r")) == NULL) |
| return FALSE; |
| print_file(file); |
| return TRUE; |
| } |
| #endif /* BB_CAT */ |
| |
| #if defined BB_ECHO || defined BB_SH || defined BB_TR |
| char process_escape_sequence(char **ptr) |
| { |
| char c; |
| |
| switch (c = *(*ptr)++) { |
| case 'a': |
| c = '\a'; |
| break; |
| case 'b': |
| c = '\b'; |
| break; |
| case 'f': |
| c = '\f'; |
| break; |
| case 'n': |
| c = '\n'; |
| break; |
| case 'r': |
| c = '\r'; |
| break; |
| case 't': |
| c = '\t'; |
| break; |
| case 'v': |
| c = '\v'; |
| break; |
| case '\\': |
| c = '\\'; |
| break; |
| case '0': case '1': case '2': case '3': |
| case '4': case '5': case '6': case '7': |
| c -= '0'; |
| if ('0' <= **ptr && **ptr <= '7') { |
| c = c * 8 + (*(*ptr)++ - '0'); |
| if ('0' <= **ptr && **ptr <= '7') |
| c = c * 8 + (*(*ptr)++ - '0'); |
| } |
| break; |
| default: |
| (*ptr)--; |
| c = '\\'; |
| break; |
| } |
| return c; |
| } |
| #endif |
| |
| #if defined BB_BASENAME || defined BB_LN || defined BB_SH || defined BB_INIT || \ |
| defined BB_FEATURE_USE_PROCFS || defined BB_WGET |
| char *get_last_path_component(char *path) |
| { |
| char *s=path+strlen(path)-1; |
| |
| /* strip trailing slashes */ |
| while (s != path && *s == '/') { |
| *s-- = '\0'; |
| } |
| |
| /* find last component */ |
| s = strrchr(path, '/'); |
| if (s == NULL || s[1] == '\0') |
| return path; |
| else |
| return s+1; |
| } |
| #endif |
| |
| #if defined BB_GREP || defined BB_SED |
| void xregcomp(regex_t *preg, const char *regex, int cflags) |
| { |
| int ret; |
| if ((ret = regcomp(preg, regex, cflags)) != 0) { |
| int errmsgsz = regerror(ret, preg, NULL, 0); |
| char *errmsg = xmalloc(errmsgsz); |
| regerror(ret, preg, errmsg, errmsgsz); |
| error_msg_and_die("xregcomp: %s\n", errmsg); |
| } |
| } |
| #endif |
| |
| #if defined BB_CAT || defined BB_HEAD || defined BB_WC |
| FILE *wfopen(const char *path, const char *mode) |
| { |
| FILE *fp; |
| if ((fp = fopen(path, mode)) == NULL) { |
| perror_msg("%s", path); |
| errno = 0; |
| } |
| return fp; |
| } |
| #endif |
| |
| #if defined BB_HOSTNAME || defined BB_LOADACM || defined BB_MORE \ |
| || defined BB_SED || defined BB_SH || defined BB_TAR || defined BB_UNIQ \ |
| || defined BB_WC || defined BB_CMP || defined BB_SORT |
| FILE *xfopen(const char *path, const char *mode) |
| { |
| FILE *fp; |
| if ((fp = fopen(path, mode)) == NULL) |
| perror_msg_and_die("%s", path); |
| return fp; |
| } |
| #endif |
| |
| int applet_name_compare(const void *x, const void *y) |
| { |
| const struct BB_applet *applet1 = x; |
| const struct BB_applet *applet2 = y; |
| |
| return strcmp(applet1->name, applet2->name); |
| } |
| |
| #if defined BB_DD || defined BB_TAIL |
| unsigned long parse_number(const char *numstr, struct suffix_mult *suffixes) |
| { |
| struct suffix_mult *sm; |
| unsigned long int ret; |
| int len; |
| char *end; |
| |
| ret = strtoul(numstr, &end, 10); |
| if (numstr == end) |
| error_msg_and_die("invalid number `%s'\n", numstr); |
| while (end[0] != '\0') { |
| for (sm = suffixes; sm->suffix != NULL; sm++) { |
| len = strlen(sm->suffix); |
| if (strncmp(sm->suffix, end, len) == 0) { |
| ret *= sm->mult; |
| end += len; |
| break; |
| } |
| } |
| if (sm->suffix == NULL) |
| error_msg_and_die("invalid number `%s'\n", numstr); |
| } |
| return ret; |
| } |
| #endif |
| |
| #if defined BB_DD || defined BB_NC || defined BB_TAIL |
| ssize_t safe_read(int fd, void *buf, size_t count) |
| { |
| ssize_t n; |
| |
| do { |
| n = read(fd, buf, count); |
| } while (n < 0 && errno == EINTR); |
| |
| return n; |
| } |
| #endif |
| |
| #ifdef BB_FEATURE_HUMAN_READABLE |
| char *format(unsigned long val, unsigned long hr) |
| { |
| static char str[10] = "\0"; |
| |
| if(val == 0) |
| return("0"); |
| if(hr) |
| snprintf(str, 9, "%ld", val/hr); |
| else if(val >= GIGABYTE) |
| snprintf(str, 9, "%.1LfG", ((long double)(val)/GIGABYTE)); |
| else if(val >= MEGABYTE) |
| snprintf(str, 9, "%.1LfM", ((long double)(val)/MEGABYTE)); |
| else if(val >= KILOBYTE) |
| snprintf(str, 9, "%.1Lfk", ((long double)(val)/KILOBYTE)); |
| else |
| snprintf(str, 9, "%ld", (val)); |
| return(str); |
| } |
| #endif |
| |
| /* END CODE */ |
| /* |
| Local Variables: |
| c-file-style: "linux" |
| c-basic-offset: 4 |
| tab-width: 4 |
| End: |
| */ |