/*
* Utility routines.
*
- * Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
+ * 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
#include <string.h>
#include <errno.h>
#include <fcntl.h>
-//#include <sys/types.h>
-//#include <sys/stat.h>
#include <dirent.h>
#include <time.h>
#include <utime.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <ctype.h>
+
+#if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
+# if defined BB_FEATURE_USE_PROCFS
+const char mtab_file[] = "/proc/mounts";
+# else
+# if defined BB_MTAB
+const char mtab_file[] = "/etc/mtab";
+# else
+# error With (BB_MOUNT||BB_UMOUNT||BB_DF) defined, you must define either BB_MTAB or BB_FEATURE_USE_PROCFS
+# endif
+# endif
+#endif
+
+
+extern void usage(const char *usage)
+{
+ fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", BB_VER, BB_BT);
+ fprintf(stderr, "Usage: %s\n", usage);
+ exit(FALSE);
+}
+
+
+#if defined (BB_INIT) || defined (BB_PS)
+
+#if ! defined BB_FEATURE_USE_PROCFS
+#error Sorry, I depend on the /proc filesystem right now.
+#endif
+/* 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> }
+ */
+int
+get_kernel_revision()
+{
+ FILE *file;
+ int major=0, minor=0, patch=0;
+ char* filename="/proc/sys/kernel/osrelease";
+
+ file = fopen(filename,"r");
+ if (file == NULL) {
+ /* bummer, /proc must not be mounted... */
+ return( 0);
+ }
+ fscanf(file,"%d.%d.%d",&major,&minor,&patch);
+ fclose(file);
+ return major*65536 + minor*256 + patch;
+}
+
+#endif
+
+
+
+#if defined (BB_CP) || defined (BB_MV)
+/*
+ * Return TRUE if a fileName is a directory.
+ * Nonexistant files return FALSE.
+ */
+int isDirectory(const char *name)
+{
+ struct stat statBuf;
+
+ if (stat(name, &statBuf) < 0)
+ return FALSE;
+ if (S_ISDIR(statBuf.st_mode))
+ return TRUE;
+ return(FALSE);
+}
-#if 0
-extern char *
-join_paths(char * buffer, const char * a, const char * b)
+/*
+ * 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 indicted if the attributes cannot
+ * be set.)
+ * -Erik Andersen
+ */
+int
+copyFile( const char *srcName, const char *destName,
+ int setModes, int followLinks)
{
- int length = 0;
+ int rfd;
+ int wfd;
+ int rcc;
+ int result;
+ char buf[BUF_SIZE];
+ struct stat srcStatBuf;
+ struct stat dstStatBuf;
+ struct utimbuf times;
+
+ if (followLinks == FALSE)
+ result = stat(srcName, &srcStatBuf);
+ else
+ result = lstat(srcName, &srcStatBuf);
+ if (result < 0) {
+ perror(srcName);
+ return FALSE;
+ }
+
+ if (followLinks == FALSE)
+ result = stat(destName, &dstStatBuf);
+ else
+ result = lstat(destName, &dstStatBuf);
+ if (result < 0) {
+ dstStatBuf.st_ino = -1;
+ dstStatBuf.st_dev = -1;
+ }
- if ( a && *a ) {
- length = strlen(a);
- memcpy(buffer, a, length);
+ if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
+ (srcStatBuf.st_ino == dstStatBuf.st_ino)) {
+ fprintf(stderr, "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 */
+ if (mkdir(destName, 0777777 ^ umask(0))) {
+ perror(destName);
+ return (FALSE);
}
- if ( b && *b ) {
- if ( length > 0 && buffer[length - 1] != '/' )
- buffer[length++] = '/';
- if ( *b == '/' )
- b++;
- strcpy(&buffer[length], b);
+ } else if (S_ISLNK(srcStatBuf.st_mode)) {
+ char *link_val;
+ int link_size;
+
+ //fprintf(stderr, "copying link %s to %s\n", srcName, destName);
+ link_val = (char *) alloca(PATH_MAX + 2);
+ link_size = readlink(srcName, link_val, PATH_MAX + 1);
+ if (link_size < 0) {
+ perror(srcName);
+ return (FALSE);
}
- return buffer;
-}
+ link_val[link_size] = '\0';
+ link_size = symlink(link_val, destName);
+ if (link_size != 0) {
+ perror(destName);
+ return (FALSE);
+ }
+ } else if (S_ISFIFO(srcStatBuf.st_mode)) {
+ //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
+ if (mkfifo(destName, 644)) {
+ perror(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)) {
+ perror(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(srcName);
+ return FALSE;
+ }
+
+ wfd = creat(destName, srcStatBuf.st_mode);
+ if (wfd < 0) {
+ perror(destName);
+ close(rfd);
+ return FALSE;
+ }
+
+ while ((rcc = read(rfd, buf, sizeof(buf))) > 0) {
+ if (fullWrite(wfd, buf, rcc) < 0)
+ goto error_exit;
+ }
+ if (rcc < 0) {
+ goto error_exit;
+ }
+
+ close(rfd);
+ if (close(wfd) < 0) {
+ return FALSE;
+ }
+ }
+ if (setModes == TRUE) {
+ //fprintf(stderr, "Setting permissions for %s\n", destName);
+ chmod(destName, srcStatBuf.st_mode);
+#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
+ if (followLinks == FALSE)
+ lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
+ else
#endif
+ chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
+
+ times.actime = srcStatBuf.st_atime;
+ times.modtime = srcStatBuf.st_mtime;
+ utime(destName, ×);
+ }
+ return TRUE;
+
+
+ error_exit:
+ perror(destName);
+ close(rfd);
+ close(wfd);
+
+ return FALSE;
+}
+#endif
+#if defined BB_TAR || defined BB_LS
-static CHUNK * chunkList;
+#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
+};
+
+#define MODE1 "rwxrwxrwx"
+#define MODE0 "---------"
+#define SMODE1 "..s..s..t"
+#define 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 *
-modeString(int mode)
+const char *modeString(int mode)
{
- static char buf[12];
-
- strcpy(buf, "----------");
-
- /*
- * Fill in the file type.
- */
- if (S_ISDIR(mode))
- buf[0] = 'd';
- if (S_ISCHR(mode))
- buf[0] = 'c';
- if (S_ISBLK(mode))
- buf[0] = 'b';
- if (S_ISFIFO(mode))
- buf[0] = 'p';
-#ifdef S_ISLNK
- if (S_ISLNK(mode))
- buf[0] = 'l';
-#endif
-#ifdef S_ISSOCK
- if (S_ISSOCK(mode))
- buf[0] = 's';
-#endif
-
- /*
- * Now fill in the normal file permissions.
- */
- if (mode & S_IRUSR)
- buf[1] = 'r';
- if (mode & S_IWUSR)
- buf[2] = 'w';
- if (mode & S_IXUSR)
- buf[3] = 'x';
- if (mode & S_IRGRP)
- buf[4] = 'r';
- if (mode & S_IWGRP)
- buf[5] = 'w';
- if (mode & S_IXGRP)
- buf[6] = 'x';
- if (mode & S_IROTH)
- buf[7] = 'r';
- if (mode & S_IWOTH)
- buf[8] = 'w';
- if (mode & S_IXOTH)
- buf[9] = 'x';
-
- /*
- * Finally fill in magic stuff like suid and sticky text.
- */
- if (mode & S_ISUID)
- buf[3] = ((mode & S_IXUSR) ? 's' : 'S');
- if (mode & S_ISGID)
- buf[6] = ((mode & S_IXGRP) ? 's' : 'S');
- if (mode & S_ISVTX)
- buf[9] = ((mode & S_IXOTH) ? 't' : 'T');
-
- return buf;
+ 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
+#if defined BB_TAR
/*
- * Return TRUE if a fileName is a directory.
- * Nonexistant files return FALSE.
+ * Return the standard ls-like time string from a time_t
+ * This is static and so is overwritten on each call.
*/
-BOOL
-isDirectory(const char * name)
+const char *timeString(time_t timeVal)
{
- struct stat statBuf;
+ time_t now;
+ char *str;
+ static char buf[26];
- if (stat(name, &statBuf) < 0)
- return FALSE;
+ time(&now);
- return S_ISDIR(statBuf.st_mode);
-}
+ 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;
+}
/*
- * Return TRUE if a filename is a block or character device.
- * Nonexistant files return FALSE.
+ * 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.
*/
-BOOL
-isDevice(const char * name)
+int fullWrite(int fd, const char *buf, int len)
{
- struct stat statBuf;
+ int cc;
+ int total;
- if (stat(name, &statBuf) < 0)
- return FALSE;
+ total = 0;
+
+ while (len > 0) {
+ cc = write(fd, buf, len);
+
+ if (cc < 0)
+ return -1;
- return S_ISBLK(statBuf.st_mode) || S_ISCHR(statBuf.st_mode);
+ buf += cc;
+ total += cc;
+ len -= cc;
+ }
+
+ return total;
}
+#endif
+#if defined BB_TAR || defined BB_TAIL
/*
- * 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 indicted if the attributes cannot
- * be set.)
+ * 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.
*/
-BOOL
-copyFile(
- const char * srcName,
- const char * destName,
- BOOL setModes
-)
+int fullRead(int fd, char *buf, int len)
{
- int rfd;
- int wfd;
- int rcc;
- char buf[BUF_SIZE];
- struct stat statBuf1;
- struct stat statBuf2;
- struct utimbuf times;
-
- if (stat(srcName, &statBuf1) < 0)
- {
- perror(srcName);
+ int cc;
+ int total;
- return FALSE;
- }
+ total = 0;
- if (stat(destName, &statBuf2) < 0)
- {
- statBuf2.st_ino = -1;
- statBuf2.st_dev = -1;
- }
+ while (len > 0) {
+ cc = read(fd, buf, len);
- if ((statBuf1.st_dev == statBuf2.st_dev) &&
- (statBuf1.st_ino == statBuf2.st_ino))
- {
- fprintf(stderr, "Copying file \"%s\" to itself\n", srcName);
+ if (cc < 0)
+ return -1;
- return FALSE;
- }
+ if (cc == 0)
+ break;
- rfd = open(srcName, O_RDONLY);
+ buf += cc;
+ total += cc;
+ len -= cc;
+ }
- if (rfd < 0)
- {
- perror(srcName);
+ return total;
+}
+#endif
- return FALSE;
- }
- wfd = creat(destName, statBuf1.st_mode);
+#if defined (BB_CHOWN) || defined (BB_CP) || defined (BB_FIND) || defined (BB_LS) || defined (BB_INSMOD)
+/*
+ * Walk down all the directories under the specified
+ * location, and do something (something specified
+ * by the fileAction and dirAction function pointers).
+ *
+ * Unfortunatly, 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
+recursiveAction(const char *fileName, int recurse, int followLinks, int depthFirst,
+ int (*fileAction) (const char *fileName, struct stat* statbuf),
+ int (*dirAction) (const char *fileName, struct stat* statbuf))
+{
+ int status;
+ struct stat statbuf;
+ struct dirent *next;
- if (wfd < 0)
- {
- perror(destName);
- close(rfd);
+ if (followLinks == TRUE)
+ status = stat(fileName, &statbuf);
+ else
+ status = lstat(fileName, &statbuf);
- return FALSE;
- }
+ if (status < 0) {
+ perror(fileName);
+ return (FALSE);
+ }
- while ((rcc = read(rfd, buf, sizeof(buf))) > 0)
- {
- if (fullWrite(wfd, buf, rcc) < 0)
- goto error_exit;
- }
+ if ( (followLinks == FALSE) && (S_ISLNK(statbuf.st_mode)) ) {
+ if (fileAction == NULL)
+ return (TRUE);
+ else
+ return (fileAction(fileName, &statbuf));
+ }
- if (rcc < 0)
- {
- perror(srcName);
- goto error_exit;
+ if (recurse == FALSE) {
+ if (S_ISDIR(statbuf.st_mode)) {
+ if (dirAction != NULL)
+ return (dirAction(fileName, &statbuf));
+ else
+ return (TRUE);
+ }
+ }
+
+ if (S_ISDIR(statbuf.st_mode)) {
+ DIR *dir;
+ dir = opendir(fileName);
+ if (!dir) {
+ perror(fileName);
+ return (FALSE);
+ }
+ if (dirAction != NULL && depthFirst == FALSE) {
+ status = dirAction(fileName, &statbuf);
+ if (status == FALSE) {
+ perror(fileName);
+ return (FALSE);
+ }
+ }
+ while ((next = readdir(dir)) != NULL) {
+ char nextFile[NAME_MAX];
+ if ((strcmp(next->d_name, "..") == 0)
+ || (strcmp(next->d_name, ".") == 0)) {
+ continue;
+ }
+ sprintf(nextFile, "%s/%s", fileName, next->d_name);
+ status =
+ recursiveAction(nextFile, TRUE, followLinks, depthFirst,
+ fileAction, dirAction);
+ if (status < 0) {
+ closedir(dir);
+ return (FALSE);
+ }
+ }
+ status = closedir(dir);
+ if (status < 0) {
+ perror(fileName);
+ return (FALSE);
+ }
+ if (dirAction != NULL && depthFirst == TRUE) {
+ status = dirAction(fileName, &statbuf);
+ if (status == FALSE) {
+ perror(fileName);
+ return (FALSE);
+ }
}
+ } else {
+ if (fileAction == NULL)
+ return (TRUE);
+ else
+ return (fileAction(fileName, &statbuf));
+ }
+ return (TRUE);
+}
- (void) close(rfd);
+#endif
- if (close(wfd) < 0)
- {
- perror(destName);
- return FALSE;
- }
- if (setModes)
- {
- (void) chmod(destName, statBuf1.st_mode);
+#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 void createPath (const char *name, int mode)
+{
+ char *cp;
+ char *cpOld;
+ char buf[NAME_MAX];
+
+ strcpy( buf, name);
+ cp = strchr (buf, '/');
+ while (cp) {
+ cpOld = cp;
+ cp = strchr (cp + 1, '/');
+ *cpOld = '\0';
+ mkdir (buf, cp ? 0777 : mode);
+ *cpOld = '/';
+ }
+}
+#endif
- (void) chown(destName, statBuf1.st_uid, statBuf1.st_gid);
- times.actime = statBuf1.st_atime;
- times.modtime = statBuf1.st_mtime;
- (void) utime(destName, ×);
- }
+#if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR)
+/* [ugoa]{+|-|=}[rwxst] */
- return TRUE;
-error_exit:
- close(rfd);
- close(wfd);
+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;
+
+ 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;
+ }
- return FALSE;
+ 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);
}
-/*
- * Build a path name from the specified directory name and file name.
- * If the directory name is NULL, then the original fileName is returned.
- * The built path is in a static area, and is overwritten for each call.
- */
-const char *
-buildName(const char * dirName, const char * fileName)
-{
- const char * cp;
- static char buf[PATH_LEN];
+#endif
+
- if ((dirName == NULL) || (*dirName == '\0'))
- return fileName;
- cp = strrchr(fileName, '/');
- if (cp)
- fileName = cp + 1;
- strcpy(buf, dirName);
- strcat(buf, "/");
- strcat(buf, fileName);
- return buf;
+
+#if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_PS)
+
+/* Use this to avoid needing the glibc NSS stuff
+ * This uses storage buf to hold things.
+ * */
+uid_t
+my_getid(const char *filename, char *name, uid_t id)
+{
+ FILE *file;
+ char *rname, *start, *end, buf[128];
+ uid_t rid;
+
+ file=fopen(filename,"r");
+ if (file == NULL) {
+ perror(filename);
+ return (-1);
+ }
+
+ while (fgets (buf, 128, file) != NULL) {
+ if (buf[0] == '#')
+ continue;
+
+ start = buf;
+ end = strchr (start, ':');
+ if (end == NULL)
+ continue;
+ *end = '\0';
+ rname = start;
+
+ start = end + 1;
+ end = strchr (start, ':');
+ if (end == NULL)
+ continue;
+
+ start = end + 1;
+ rid = (uid_t) strtol (start, &end, 10);
+ if (end == start)
+ continue;
+
+ if (name) {
+ if (0 == strcmp(rname, name)) {
+ fclose( file);
+ return( rid);
+ }
+ }
+ if ( id != -1 && id == rid ) {
+ strncpy(name, rname, 8);
+ fclose( file);
+ return( TRUE);
+ }
+ }
+ fclose(file);
+ return (-1);
}
+uid_t
+my_getpwnam(char *name)
+{
+ return my_getid("/etc/passwd", name, -1);
+}
+gid_t
+my_getgrnam(char *name)
+{
+ return my_getid("/etc/group", name, -1);
+}
-/*
- * Make a NULL-terminated string out of an argc, argv pair.
- * Returns TRUE if successful, or FALSE if the string is too long,
- * with an error message given. This does not handle spaces within
- * arguments correctly.
- */
-BOOL
-makeString(
- int argc,
- const char ** argv,
- char * buf,
- int bufLen
-)
+void
+my_getpwuid(char* name, uid_t uid)
{
- int len;
+ my_getid("/etc/passwd", name, uid);
+}
- while (argc-- > 0)
- {
- len = strlen(*argv);
+void
+my_getgrgid(char* group, gid_t gid)
+{
+ my_getid("/etc/group", group, gid);
+}
- if (len >= bufLen)
- {
- fprintf(stderr, "Argument string too long\n");
- return FALSE;
- }
+#endif
- strcpy(buf, *argv++);
- buf += len;
- bufLen -= len;
- if (argc)
- *buf++ = ' ';
- bufLen--;
- }
+#if (defined BB_CHVT) || (defined BB_DEALLOCVT)
- *buf = '\0';
- return TRUE;
+#include <linux/kd.h>
+#include <sys/ioctl.h>
+
+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;
+}
/*
- * Allocate a chunk of memory (like malloc).
- * The difference, though, is that the memory allocated is put on a
- * list of chunks which can be freed all at one time. You CAN NOT free
- * an individual chunk.
+ * 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.
*/
-char *
-getChunk(int size)
+
+int get_console_fd(char* tty_name)
{
- CHUNK * chunk;
+ 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;
+
+ fprintf(stderr,
+ "Couldnt get a file descriptor referring to the console\n");
+ return -1; /* total failure */
+}
- if (size < CHUNK_INIT_SIZE)
- size = CHUNK_INIT_SIZE;
- chunk = (CHUNK *) malloc(size + sizeof(CHUNK) - CHUNK_INIT_SIZE);
+#endif
- if (chunk == NULL)
- return NULL;
- chunk->next = chunkList;
- chunkList = chunk;
+#if !defined BB_REGEXP && (defined BB_GREP || defined BB_SED)
- return chunk->data;
-}
+/* Do a case insensitive strstr() */
+char* stristr(char *haystack, const char *needle)
+{
+ int len = strlen( needle );
+ while( *haystack ) {
+ if( !strncasecmp( haystack, needle, len ) )
+ break;
+ haystack++;
+ }
+ if( !(*haystack) )
+ haystack = NULL;
-/*
- * Duplicate a string value using the chunk allocator.
- * The returned string cannot be individually freed, but can only be freed
- * with other strings when freeChunks is called. Returns NULL on failure.
+ return haystack;
+}
+
+/* This tries to find a needle in a haystack, but does so by
+ * only trying to match literal strings (look 'ma, no regexps!)
+ * This is short, sweet, and carries _very_ little baggage,
+ * unlike its beefier cousin in regexp.c
+ * -Erik Andersen
*/
-char *
-chunkstrdup(const char * str)
+extern int find_match(char *haystack, char *needle, int ignoreCase)
{
- int len;
- char * newStr;
-
- len = strlen(str) + 1;
- newStr = getChunk(len);
-
- if (newStr)
- memcpy(newStr, str, len);
- return newStr;
+ if (ignoreCase == FALSE)
+ haystack = strstr (haystack, needle);
+ else
+ haystack = stristr (haystack, needle);
+ if (haystack == NULL)
+ return FALSE;
+ return TRUE;
}
-/*
- * Free all chunks of memory that had been allocated since the last
- * call to this routine.
- */
-void
-freeChunks(void)
+/* This performs substitutions after a string match has been found. */
+extern int replace_match(char *haystack, char *needle, char *newNeedle, int ignoreCase)
{
- CHUNK * chunk;
+ int foundOne=0;
+ char *where, *slider, *slider1, *oldhayStack;
- while (chunkList)
- {
- chunk = chunkList;
- chunkList = chunk->next;
- free((char *) chunk);
+ if (ignoreCase == FALSE)
+ where = strstr (haystack, needle);
+ else
+ where = stristr (haystack, needle);
+
+ if (strcmp(needle, newNeedle)==0)
+ return FALSE;
+
+ oldhayStack = (char*)malloc((unsigned)(strlen(haystack)));
+ while(where!=NULL) {
+ foundOne++;
+ strcpy(oldhayStack, haystack);
+#if 0
+ if ( strlen(newNeedle) > strlen(needle)) {
+ haystack = (char *)realloc(haystack, (unsigned)(strlen(haystack) -
+ strlen(needle) + strlen(newNeedle)));
}
+#endif
+ for(slider=haystack,slider1=oldhayStack;slider!=where;slider++,slider1++);
+ *slider=0;
+ haystack=strcat(haystack, newNeedle);
+ slider1+=strlen(needle);
+ haystack = strcat(haystack, slider1);
+ where = strstr (slider, needle);
+ }
+ free( oldhayStack);
+
+ if (foundOne > 0)
+ return TRUE;
+ else
+ return FALSE;
}
+#endif
+
+
+#if defined BB_FIND
/*
- * 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.
+ * 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.
*/
-int
-fullWrite(int fd, const char * buf, int len)
+extern int
+check_wildcard_match(const char* text, const char* pattern)
{
- int cc;
- int total;
+ const char* retryPat;
+ const char* retryText;
+ int ch;
+ int found;
+
+ retryPat = NULL;
+ retryText = NULL;
- total = 0;
+ while (*text || *pattern)
+ {
+ ch = *pattern++;
- while (len > 0)
+ switch (ch)
{
- cc = write(fd, buf, len);
+ 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;
+ }
- if (cc < 0)
- return -1;
+ //if (!found)
+ if (found==TRUE)
+ {
+ pattern = retryPat;
+ text = ++retryText;
+ }
+
+ /* 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;
+ }
- buf += cc;
- total+= cc;
- len -= cc;
+ return FALSE;
}
- return total;
+ if (pattern == NULL)
+ return FALSE;
+ }
+
+ return TRUE;
}
+#endif
+
+
+#if defined BB_DF | defined BB_MTAB
/*
- * 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.
+ * 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.
*/
-int
-fullRead(int fd, char * buf, int len)
+extern struct mntent *findMountPoint(const char *name, const char *table)
{
- int cc;
- int total;
+ struct stat s;
+ dev_t mountDevice;
+ FILE *mountTable;
+ struct mntent *mountEntry;
- total = 0;
+ if (stat(name, &s) != 0)
+ return 0;
- while (len > 0)
- {
- cc = read(fd, buf, len);
+ if ((s.st_mode & S_IFMT) == S_IFBLK)
+ mountDevice = s.st_rdev;
+ else
+ mountDevice = s.st_dev;
- if (cc < 0)
- return -1;
- if (cc == 0)
- break;
+ 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
+
- buf += cc;
- total+= cc;
- len -= cc;
- }
- return total;
+#if !defined BB_MTAB && (defined BB_MOUNT || defined BB_DF )
+extern void whine_if_fstab_is_missing()
+{
+ struct stat statBuf;
+ if (stat("/etc/fstab", &statBuf) < 0)
+ fprintf(stderr, "/etc/fstab file missing -- install one to name /dev/root.\n\n");
}
+#endif
+#if defined BB_DD || defined BB_TAIL
/*
- * Walk down all the directories under the specified
- * location, and do something (something specified
- * by the fileAction and dirAction function pointers).
+ * Read a number with a possible multiplier.
+ * Returns -1 if the number format is illegal.
*/
-int
-recursiveAction( const char *fileName, BOOL recurse, BOOL followLinks,
- int (*fileAction)(const char* fileName),
- int (*dirAction)(const char* fileName))
+extern long getNum (const char *cp)
{
- int status;
- struct stat statbuf;
- struct dirent* next;
+ long value;
- if (!recurse && S_ISDIR(statbuf.st_mode)) {
- if (dirAction==NULL)
- return(TRUE);
- else
- return(dirAction(fileName));
- } else {
- if (fileAction==NULL)
- return(TRUE);
- else
- return(fileAction(fileName));
- }
+ if (!isDecimal (*cp))
+ return -1;
- if (followLinks)
- status = stat(fileName, &statbuf);
- else
- status = lstat(fileName, &statbuf);
+ value = 0;
- if (status < 0) {
- perror(fileName);
- return( FALSE);
- }
+ while (isDecimal (*cp))
+ value = value * 10 + *cp++ - '0';
- if (S_ISDIR(statbuf.st_mode)) {
- DIR *dir;
- dir = opendir(fileName);
- if (!dir) {
- perror(fileName);
- return(FALSE);
- }
- while ((next = readdir (dir)) != NULL) {
- char nextFile[NAME_MAX];
- if ( (strcmp(next->d_name, "..") == 0) || (strcmp(next->d_name, ".") == 0) ) {
- continue;
- }
- sprintf(nextFile, "%s/%s", fileName, next->d_name);
- status = recursiveAction(nextFile, TRUE, followLinks, fileAction, dirAction);
- if (status < 0) {
- closedir(dir);
- return(FALSE);
- }
- }
- status = closedir (dir);
- if (status < 0) {
- perror(fileName);
- return( FALSE);
- }
- if (dirAction==NULL)
- return(TRUE);
- else
- return(dirAction(fileName));
- }
- else {
- if (fileAction==NULL)
- return(TRUE);
- else
- return(fileAction(fileName));
+ switch (*cp++) {
+ case 'm':
+ value *= 1048576;
+ break;
+
+ case 'k':
+ value *= 1024;
+ break;
+
+ case 'b':
+ value *= 512;
+ break;
+
+ case 'w':
+ value *= 2;
+ break;
+
+ case '\0':
+ return value;
+
+ default:
+ return -1;
}
+
+ if (*cp)
+ return -1;
+
+ return value;
}
+#endif
+
+#if defined BB_INIT || defined BB_HALT || defined BB_REBOOT
+#if ! defined BB_FEATURE_USE_PROCFS
+#error Sorry, I depend on the /proc filesystem right now.
+#endif
+/* findInitPid()
+ *
+ * This finds the pid of init (which is not always 1).
+ * Currently, it's implemented by rummaging through the proc filesystem.
+ *
+ * [return]
+ * 0 failure
+ * pid when init's pid is found.
+ */
+extern pid_t
+findInitPid()
+{
+ pid_t init_pid;
+ char filename[256];
+ char buffer[256];
+
+ /* no need to opendir ;) */
+ for (init_pid = 1; init_pid < 65536; init_pid++) {
+ FILE *status;
+
+ sprintf(filename, "/proc/%d/status", init_pid);
+ status = fopen(filename, "r");
+ if (!status) { continue; }
+ fgets(buffer, 256, status);
+ fclose(status);
+
+ if ( (strstr(buffer, "init\n") != NULL )) {
+ return init_pid;
+ }
+ }
+ return 0;
+}
+#endif
/* END CODE */
projects / oweals / busybox.git / blobdiff