1243 lines
25 KiB
C
1243 lines
25 KiB
C
/*
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* Utility routines.
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*
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* Copyright (C) tons of folks. Tracking down who wrote what
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* isn't something I'm going to worry about... If you wrote something
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* here, please feel free to acknowledge your work.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
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* Permission has been granted to redistribute this code under the GPL.
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <time.h>
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#include <utime.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <ctype.h>
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|
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#if defined BB_FEATURE_MOUNT_LOOP
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <linux/loop.h>
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#endif
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|
|
|
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#if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF
|
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# if defined BB_FEATURE_USE_PROCFS
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const char mtab_file[] = "/proc/mounts";
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# else
|
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# if defined BB_MTAB
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const char mtab_file[] = "/etc/mtab";
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|
# else
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# error With (BB_MOUNT||BB_UMOUNT||BB_DF) defined, you must define either BB_MTAB or BB_FEATURE_USE_PROCFS
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# endif
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|
# endif
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|
#endif
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|
|
|
|
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extern void usage(const char *usage)
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|
{
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fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", BB_VER, BB_BT);
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fprintf(stderr, "Usage: %s\n", usage);
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exit(FALSE);
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}
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|
|
|
|
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#if defined (BB_INIT) || defined (BB_PS)
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|
|
|
#if ! defined BB_FEATURE_USE_PROCFS
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#error Sorry, I depend on the /proc filesystem right now.
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#endif
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/* Returns kernel version encoded as major*65536 + minor*256 + patch,
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* so, for example, to check if the kernel is greater than 2.2.11:
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* if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
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|
*/
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int
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get_kernel_revision()
|
|
{
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FILE *file;
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int major=0, minor=0, patch=0;
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char* filename="/proc/sys/kernel/osrelease";
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file = fopen(filename,"r");
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if (file == NULL) {
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/* bummer, /proc must not be mounted... */
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return( 0);
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}
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fscanf(file,"%d.%d.%d",&major,&minor,&patch);
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fclose(file);
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return major*65536 + minor*256 + patch;
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}
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|
|
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#endif
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|
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|
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#if defined (BB_CP) || defined (BB_MV)
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/*
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|
* Return TRUE if a fileName is a directory.
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* Nonexistant files return FALSE.
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|
*/
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int isDirectory(const char *name)
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|
{
|
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struct stat statBuf;
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|
|
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if (stat(name, &statBuf) < 0)
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return FALSE;
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if (S_ISDIR(statBuf.st_mode))
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return TRUE;
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return(FALSE);
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}
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|
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/*
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* Copy one file to another, while possibly preserving its modes, times,
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* and modes. Returns TRUE if successful, or FALSE on a failure with an
|
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* error message output. (Failure is not indicted if the attributes cannot
|
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* be set.)
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* -Erik Andersen
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*/
|
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int
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copyFile( const char *srcName, const char *destName,
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int setModes, int followLinks)
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|
{
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int rfd;
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|
int wfd;
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int rcc;
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int result;
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char buf[BUF_SIZE];
|
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struct stat srcStatBuf;
|
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struct stat dstStatBuf;
|
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struct utimbuf times;
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|
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if (followLinks == FALSE)
|
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result = stat(srcName, &srcStatBuf);
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else
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result = lstat(srcName, &srcStatBuf);
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if (result < 0) {
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|
perror(srcName);
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return FALSE;
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}
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|
|
|
if (followLinks == FALSE)
|
|
result = stat(destName, &dstStatBuf);
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else
|
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result = lstat(destName, &dstStatBuf);
|
|
if (result < 0) {
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dstStatBuf.st_ino = -1;
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dstStatBuf.st_dev = -1;
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}
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|
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if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
|
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(srcStatBuf.st_ino == dstStatBuf.st_ino)) {
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fprintf(stderr, "Copying file \"%s\" to itself\n", srcName);
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return FALSE;
|
|
}
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|
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if (S_ISDIR(srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
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/* Make sure the directory is writable */
|
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result = mkdir(destName, 0777777 ^ umask(0));
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|
if (result < 0 && errno != EEXIST) {
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|
perror(destName);
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return (FALSE);
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}
|
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} else if (S_ISLNK(srcStatBuf.st_mode)) {
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char *link_val;
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int link_size;
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//fprintf(stderr, "copying link %s to %s\n", srcName, destName);
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link_val = (char *) alloca(PATH_MAX + 2);
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link_size = readlink(srcName, link_val, PATH_MAX + 1);
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if (link_size < 0) {
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perror(srcName);
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return (FALSE);
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}
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link_val[link_size] = '\0';
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link_size = symlink(link_val, destName);
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if (link_size != 0) {
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perror(destName);
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return (FALSE);
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}
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} else if (S_ISFIFO(srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
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if (mkfifo(destName, 0644)) {
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perror(destName);
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return (FALSE);
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}
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} else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
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|| S_ISSOCK (srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
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if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev)) {
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perror(destName);
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return (FALSE);
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}
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} else if (S_ISREG(srcStatBuf.st_mode)) {
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//fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
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rfd = open(srcName, O_RDONLY);
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if (rfd < 0) {
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perror(srcName);
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return FALSE;
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}
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wfd = creat(destName, srcStatBuf.st_mode);
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if (wfd < 0) {
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perror(destName);
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close(rfd);
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return FALSE;
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}
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while ((rcc = read(rfd, buf, sizeof(buf))) > 0) {
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if (fullWrite(wfd, buf, rcc) < 0)
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goto error_exit;
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}
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if (rcc < 0) {
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goto error_exit;
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}
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close(rfd);
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if (close(wfd) < 0) {
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return FALSE;
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}
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}
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if (setModes == TRUE) {
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//fprintf(stderr, "Setting permissions for %s\n", destName);
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chmod(destName, srcStatBuf.st_mode);
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#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
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if (followLinks == FALSE)
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lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
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else
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#endif
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chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
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times.actime = srcStatBuf.st_atime;
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times.modtime = srcStatBuf.st_mtime;
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utime(destName, ×);
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}
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return TRUE;
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error_exit:
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perror(destName);
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close(rfd);
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close(wfd);
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return FALSE;
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}
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#endif
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#if defined BB_TAR || defined BB_LS
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#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
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#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
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/* The special bits. If set, display SMODE0/1 instead of MODE0/1 */
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static const mode_t SBIT[] = {
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0, 0, S_ISUID,
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0, 0, S_ISGID,
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0, 0, S_ISVTX
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};
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|
/* The 9 mode bits to test */
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static const mode_t MBIT[] = {
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S_IRUSR, S_IWUSR, S_IXUSR,
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S_IRGRP, S_IWGRP, S_IXGRP,
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S_IROTH, S_IWOTH, S_IXOTH
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};
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#define MODE1 "rwxrwxrwx"
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#define MODE0 "---------"
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#define SMODE1 "..s..s..t"
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#define SMODE0 "..S..S..T"
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|
|
/*
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* Return the standard ls-like mode string from a file mode.
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* This is static and so is overwritten on each call.
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*/
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const char *modeString(int mode)
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{
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static char buf[12];
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int i;
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buf[0] = TYPECHAR(mode);
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for (i=0; i<9; i++) {
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if (mode & SBIT[i])
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buf[i+1] = (mode & MBIT[i])?
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SMODE1[i] : SMODE0[i];
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else
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buf[i+1] = (mode & MBIT[i])?
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MODE1[i] : MODE0[i];
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}
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return buf;
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}
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#endif
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|
|
|
|
#if defined BB_TAR
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/*
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* Return the standard ls-like time string from a time_t
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* This is static and so is overwritten on each call.
|
|
*/
|
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const char *timeString(time_t timeVal)
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{
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time_t now;
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char *str;
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|
static char buf[26];
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time(&now);
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|
|
str = ctime(&timeVal);
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|
|
strcpy(buf, &str[4]);
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|
buf[12] = '\0';
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|
|
|
if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) {
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strcpy(&buf[7], &str[20]);
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buf[11] = '\0';
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}
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|
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|
return buf;
|
|
}
|
|
#endif
|
|
|
|
#if defined BB_TAR || defined BB_CP || defined BB_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 fullWrite(int fd, const char *buf, int len)
|
|
{
|
|
int cc;
|
|
int total;
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|
|
|
total = 0;
|
|
|
|
while (len > 0) {
|
|
cc = write(fd, buf, len);
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|
|
|
if (cc < 0)
|
|
return -1;
|
|
|
|
buf += cc;
|
|
total += cc;
|
|
len -= cc;
|
|
}
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|
|
|
return total;
|
|
}
|
|
#endif
|
|
|
|
|
|
#if defined BB_TAR || defined BB_TAIL
|
|
/*
|
|
* 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 fullRead(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
|
|
|
|
|
|
#if defined (BB_CHMOD_CHOWN_CHGRP) || 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, statbuf1;
|
|
struct dirent *next;
|
|
|
|
if (followLinks == TRUE)
|
|
status = stat(fileName, &statbuf);
|
|
else
|
|
status = lstat(fileName, &statbuf);
|
|
|
|
if (status < 0) {
|
|
perror(fileName);
|
|
return (FALSE);
|
|
}
|
|
|
|
if ( (followLinks == FALSE) && (S_ISLNK(statbuf.st_mode)) ) {
|
|
if (fileAction == NULL)
|
|
return (TRUE);
|
|
else
|
|
return (fileAction(fileName, &statbuf));
|
|
}
|
|
|
|
if (recurse == FALSE) {
|
|
if (S_ISDIR(statbuf.st_mode)) {
|
|
if (dirAction != NULL)
|
|
return (dirAction(fileName, &statbuf));
|
|
else
|
|
return (TRUE);
|
|
}
|
|
}
|
|
|
|
status = lstat(fileName, &statbuf1);
|
|
if (status < 0) {
|
|
perror(fileName);
|
|
return (FALSE);
|
|
}
|
|
|
|
if (S_ISDIR(statbuf.st_mode) && S_ISDIR(statbuf1.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);
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#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 createPath (const char *name, int mode)
|
|
{
|
|
char *cp;
|
|
char *cpOld;
|
|
char buf[NAME_MAX];
|
|
int retVal=0;
|
|
|
|
strcpy( buf, name);
|
|
cp = strchr (buf, '/');
|
|
while (cp) {
|
|
cpOld = cp;
|
|
cp = strchr (cp + 1, '/');
|
|
*cpOld = '\0';
|
|
retVal = mkdir (buf, cp ? 0777 : mode);
|
|
*cpOld = '/';
|
|
}
|
|
/* Return the result from the final directory, as that
|
|
* is the one that counts */
|
|
if( retVal!=0) {
|
|
if ( errno!=EEXIST) {
|
|
return( FALSE);
|
|
}
|
|
}
|
|
return( TRUE);
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
#if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_MKDIR)
|
|
/* [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;
|
|
|
|
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
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#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);
|
|
}
|
|
|
|
void
|
|
my_getpwuid(char* name, uid_t uid)
|
|
{
|
|
my_getid("/etc/passwd", name, uid);
|
|
}
|
|
|
|
void
|
|
my_getgrgid(char* group, gid_t gid)
|
|
{
|
|
my_getid("/etc/group", group, gid);
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#if (defined BB_CHVT) || (defined BB_DEALLOCVT)
|
|
|
|
|
|
#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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
fprintf(stderr,
|
|
"Couldnt get a file descriptor referring to the console\n");
|
|
return -1; /* total failure */
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
|
|
#if !defined BB_REGEXP && (defined BB_GREP || defined BB_SED)
|
|
|
|
/* 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;
|
|
|
|
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
|
|
*/
|
|
extern int find_match(char *haystack, char *needle, int ignoreCase)
|
|
{
|
|
|
|
if (ignoreCase == FALSE)
|
|
haystack = strstr (haystack, needle);
|
|
else
|
|
haystack = stristr (haystack, needle);
|
|
if (haystack == NULL)
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* This performs substitutions after a string match has been found. */
|
|
extern int replace_match(char *haystack, char *needle, char *newNeedle, int ignoreCase)
|
|
{
|
|
int foundOne=0;
|
|
char *where, *slider, *slider1, *oldhayStack;
|
|
|
|
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
|
|
/*
|
|
* 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;
|
|
|
|
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;
|
|
}
|
|
|
|
//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;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
if (pattern == NULL)
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#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 *findMountPoint(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
|
|
|
|
|
|
|
|
#if defined BB_DD || defined BB_TAIL
|
|
/*
|
|
* Read a number with a possible multiplier.
|
|
* Returns -1 if the number format is illegal.
|
|
*/
|
|
extern long getNum (const char *cp)
|
|
{
|
|
long value;
|
|
|
|
if (!isDecimal (*cp))
|
|
return -1;
|
|
|
|
value = 0;
|
|
|
|
while (isDecimal (*cp))
|
|
value = value * 10 + *cp++ - '0';
|
|
|
|
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
|
|
|
|
#if defined BB_GUNZIP || defined BB_GZIP || defined BB_PRINTF || defined BB_TAIL
|
|
extern void *xmalloc (size_t size)
|
|
{
|
|
void *cp = malloc (size);
|
|
|
|
if (cp == NULL) {
|
|
error("out of memory");
|
|
}
|
|
return cp;
|
|
}
|
|
|
|
extern void error(char *msg)
|
|
{
|
|
fprintf(stderr, "\n%s\n", msg);
|
|
exit(1);
|
|
}
|
|
#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
|
|
|
|
#if defined BB_FEATURE_MOUNT_LOOP
|
|
extern int del_loop(const char *device)
|
|
{
|
|
int fd;
|
|
|
|
if ((fd = open(device, O_RDONLY)) < 0) {
|
|
perror(device);
|
|
return( FALSE);
|
|
}
|
|
if (ioctl(fd, LOOP_CLR_FD, 0) < 0) {
|
|
perror("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 (file);
|
|
return 1;
|
|
}
|
|
if ((fd = open (device, mode)) < 0) {
|
|
close(ffd);
|
|
perror (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("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("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 */
|
|
|
|
|
|
/* END CODE */
|