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231 lines
5.4 KiB
C
231 lines
5.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com>
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*
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* makedevs
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* Make ranges of device files quickly.
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* known bugs: can't deal with alpha ranges
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*/
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#include "busybox.h"
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#ifdef CONFIG_FEATURE_MAKEDEVS_LEAF
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int makedevs_main(int argc, char **argv)
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{
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mode_t mode;
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char *basedev, *type, *nodname, buf[255];
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int Smajor, Sminor, S, E;
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if (argc < 7 || *argv[1]=='-')
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bb_show_usage();
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basedev = argv[1];
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type = argv[2];
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Smajor = xatoi_u(argv[3]);
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Sminor = xatoi_u(argv[4]);
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S = xatoi_u(argv[5]);
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E = xatoi_u(argv[6]);
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nodname = argc == 8 ? basedev : buf;
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mode = 0660;
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switch (type[0]) {
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case 'c':
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mode |= S_IFCHR;
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break;
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case 'b':
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mode |= S_IFBLK;
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break;
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case 'f':
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mode |= S_IFIFO;
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break;
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default:
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bb_show_usage();
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}
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while (S <= E) {
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int sz;
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sz = snprintf(buf, sizeof(buf), "%s%d", basedev, S);
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if(sz<0 || sz>=sizeof(buf)) /* libc different */
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bb_error_msg_and_die("%s too large", basedev);
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/* if mode != S_IFCHR and != S_IFBLK third param in mknod() ignored */
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if (mknod(nodname, mode, makedev(Smajor, Sminor)))
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bb_error_msg("failed to create: %s", nodname);
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if (nodname == basedev) /* ex. /dev/hda - to /dev/hda1 ... */
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nodname = buf;
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S++;
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Sminor++;
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}
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return 0;
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}
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#elif defined CONFIG_FEATURE_MAKEDEVS_TABLE
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/* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */
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int makedevs_main(int argc, char **argv)
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{
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FILE *table = stdin;
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char *rootdir = NULL;
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char *line = NULL;
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int linenum = 0;
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int ret = EXIT_SUCCESS;
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getopt32(argc, argv, "d:", &line);
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if (line)
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table = xfopen(line, "r");
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if (optind >= argc || (rootdir=argv[optind])==NULL) {
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bb_error_msg_and_die("root directory not specified");
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}
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xchdir(rootdir);
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umask(0);
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printf("rootdir=%s\n", rootdir);
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if (line) {
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printf("table='%s'\n", line);
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} else {
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printf("table=<stdin>\n");
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}
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while ((line = xmalloc_getline(table))) {
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char type;
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unsigned int mode = 0755;
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unsigned int major = 0;
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unsigned int minor = 0;
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unsigned int count = 0;
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unsigned int increment = 0;
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unsigned int start = 0;
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char name[41];
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char user[41];
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char group[41];
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char *full_name;
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uid_t uid;
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gid_t gid;
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linenum++;
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if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", name,
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&type, &mode, user, group, &major,
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&minor, &start, &increment, &count)) ||
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((major | minor | start | count | increment) > 255))
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{
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if (*line=='\0' || *line=='#' || isspace(*line))
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continue;
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bb_error_msg("line %d invalid: '%s'", linenum, line);
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ret = EXIT_FAILURE;
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continue;
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}
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if (name[0] == '#') {
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continue;
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}
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gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid();
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uid = (*user) ? get_ug_id(user, xuname2uid) : getuid();
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full_name = concat_path_file(rootdir, name);
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if (type == 'd') {
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bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR);
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if (chown(full_name, uid, gid) == -1) {
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bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
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ret = EXIT_FAILURE;
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goto loop;
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}
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if ((mode != -1) && (chmod(full_name, mode) < 0)){
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bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
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ret = EXIT_FAILURE;
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goto loop;
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}
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} else if (type == 'f') {
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struct stat st;
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if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) {
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bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name);
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ret = EXIT_FAILURE;
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goto loop;
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}
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if (chown(full_name, uid, gid) == -1) {
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bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
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ret = EXIT_FAILURE;
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goto loop;
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}
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if ((mode != -1) && (chmod(full_name, mode) < 0)){
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bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
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ret = EXIT_FAILURE;
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goto loop;
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}
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} else
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{
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dev_t rdev;
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if (type == 'p') {
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mode |= S_IFIFO;
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}
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else if (type == 'c') {
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mode |= S_IFCHR;
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}
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else if (type == 'b') {
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mode |= S_IFBLK;
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} else {
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bb_error_msg("line %d: unsupported file type %c", linenum, type);
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ret = EXIT_FAILURE;
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goto loop;
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}
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if (count > 0) {
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int i;
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char *full_name_inc;
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full_name_inc = xmalloc(strlen(full_name) + 4);
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for (i = start; i < count; i++) {
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sprintf(full_name_inc, "%s%d", full_name, i);
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rdev = makedev(major, minor + (i * increment - start));
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if (mknod(full_name_inc, mode, rdev) == -1) {
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bb_perror_msg("line %d: cannot create node %s", linenum, full_name_inc);
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ret = EXIT_FAILURE;
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}
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else if (chown(full_name_inc, uid, gid) == -1) {
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bb_perror_msg("line %d: chown failed for %s", linenum, full_name_inc);
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ret = EXIT_FAILURE;
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}
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if ((mode != -1) && (chmod(full_name_inc, mode) < 0)){
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bb_perror_msg("line %d: chmod failed for %s", linenum, full_name_inc);
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ret = EXIT_FAILURE;
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}
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}
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free(full_name_inc);
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} else {
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rdev = makedev(major, minor);
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if (mknod(full_name, mode, rdev) == -1) {
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bb_perror_msg("line %d: cannot create node %s", linenum, full_name);
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ret = EXIT_FAILURE;
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}
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else if (chown(full_name, uid, gid) == -1) {
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bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
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ret = EXIT_FAILURE;
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}
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if ((mode != -1) && (chmod(full_name, mode) < 0)){
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bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
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ret = EXIT_FAILURE;
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}
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}
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}
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loop:
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free(line);
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free(full_name);
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}
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fclose(table);
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return ret;
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}
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#else
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# error makedevs configuration error, either leaf or table must be selected
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#endif
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