diff options
Diffstat (limited to 'miscutils/makedevs.c')
| -rw-r--r-- | miscutils/makedevs.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/miscutils/makedevs.c b/miscutils/makedevs.c new file mode 100644 index 000000000..3bc1559c7 --- /dev/null +++ b/miscutils/makedevs.c @@ -0,0 +1,230 @@ +/* vi: set sw=4 ts=4: */ +/* + * public domain -- Dave 'Kill a Cop' Cinege <dcinege@psychosis.com> + * + * makedevs + * Make ranges of device files quickly. + * known bugs: can't deal with alpha ranges + */ + +#include "busybox.h" + +#ifdef CONFIG_FEATURE_MAKEDEVS_LEAF +int makedevs_main(int argc, char **argv) +{ + mode_t mode; + char *basedev, *type, *nodname, buf[255]; + int Smajor, Sminor, S, E; + + if (argc < 7 || *argv[1]=='-') + bb_show_usage(); + + basedev = argv[1]; + type = argv[2]; + Smajor = xatoi_u(argv[3]); + Sminor = xatoi_u(argv[4]); + S = xatoi_u(argv[5]); + E = xatoi_u(argv[6]); + nodname = argc == 8 ? basedev : buf; + + mode = 0660; + + switch (type[0]) { + case 'c': + mode |= S_IFCHR; + break; + case 'b': + mode |= S_IFBLK; + break; + case 'f': + mode |= S_IFIFO; + break; + default: + bb_show_usage(); + } + + while (S <= E) { + int sz; + + sz = snprintf(buf, sizeof(buf), "%s%d", basedev, S); + if(sz<0 || sz>=sizeof(buf)) /* libc different */ + bb_error_msg_and_die("%s too large", basedev); + + /* if mode != S_IFCHR and != S_IFBLK third param in mknod() ignored */ + + if (mknod(nodname, mode, makedev(Smajor, Sminor))) + bb_error_msg("failed to create: %s", nodname); + + if (nodname == basedev) /* ex. /dev/hda - to /dev/hda1 ... */ + nodname = buf; + S++; + Sminor++; + } + + return 0; +} + +#elif defined CONFIG_FEATURE_MAKEDEVS_TABLE + +/* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ + +int makedevs_main(int argc, char **argv) +{ + FILE *table = stdin; + char *rootdir = NULL; + char *line = NULL; + int linenum = 0; + int ret = EXIT_SUCCESS; + + getopt32(argc, argv, "d:", &line); + if (line) + table = xfopen(line, "r"); + + if (optind >= argc || (rootdir=argv[optind])==NULL) { + bb_error_msg_and_die("root directory not specified"); + } + + xchdir(rootdir); + + umask(0); + + printf("rootdir=%s\n", rootdir); + if (line) { + printf("table='%s'\n", line); + } else { + printf("table=<stdin>\n"); + } + + while ((line = xmalloc_getline(table))) { + char type; + unsigned int mode = 0755; + unsigned int major = 0; + unsigned int minor = 0; + unsigned int count = 0; + unsigned int increment = 0; + unsigned int start = 0; + char name[41]; + char user[41]; + char group[41]; + char *full_name; + uid_t uid; + gid_t gid; + + linenum++; + + if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", name, + &type, &mode, user, group, &major, + &minor, &start, &increment, &count)) || + ((major | minor | start | count | increment) > 255)) + { + if (*line=='\0' || *line=='#' || isspace(*line)) + continue; + bb_error_msg("line %d invalid: '%s'", linenum, line); + ret = EXIT_FAILURE; + continue; + } + if (name[0] == '#') { + continue; + } + + gid = (*group) ? get_ug_id(group, bb_xgetgrnam) : getgid(); + uid = (*user) ? get_ug_id(user, bb_xgetpwnam) : getuid(); + full_name = concat_path_file(rootdir, name); + + if (type == 'd') { + bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR); + if (chown(full_name, uid, gid) == -1) { + bb_perror_msg("line %d: chown failed for %s", linenum, full_name); + ret = EXIT_FAILURE; + goto loop; + } + if ((mode != -1) && (chmod(full_name, mode) < 0)){ + bb_perror_msg("line %d: chmod failed for %s", linenum, full_name); + ret = EXIT_FAILURE; + goto loop; + } + } else if (type == 'f') { + struct stat st; + if ((stat(full_name, &st) < 0 || !S_ISREG(st.st_mode))) { + bb_perror_msg("line %d: regular file '%s' does not exist", linenum, full_name); + ret = EXIT_FAILURE; + goto loop; + } + if (chown(full_name, uid, gid) == -1) { + bb_perror_msg("line %d: chown failed for %s", linenum, full_name); + ret = EXIT_FAILURE; + goto loop; + } + if ((mode != -1) && (chmod(full_name, mode) < 0)){ + bb_perror_msg("line %d: chmod failed for %s", linenum, full_name); + ret = EXIT_FAILURE; + goto loop; + } + } else + { + dev_t rdev; + + if (type == 'p') { + mode |= S_IFIFO; + } + else if (type == 'c') { + mode |= S_IFCHR; + } + else if (type == 'b') { + mode |= S_IFBLK; + } else { + bb_error_msg("line %d: unsupported file type %c", linenum, type); + ret = EXIT_FAILURE; + goto loop; + } + + if (count > 0) { + int i; + char *full_name_inc; + + full_name_inc = xmalloc(strlen(full_name) + 4); + for (i = start; i < count; i++) { + sprintf(full_name_inc, "%s%d", full_name, i); + rdev = (major << 8) + minor + (i * increment - start); + if (mknod(full_name_inc, mode, rdev) == -1) { + bb_perror_msg("line %d: cannot create node %s", linenum, full_name_inc); + ret = EXIT_FAILURE; + } + else if (chown(full_name_inc, uid, gid) == -1) { + bb_perror_msg("line %d: chown failed for %s", linenum, full_name_inc); + ret = EXIT_FAILURE; + } + if ((mode != -1) && (chmod(full_name_inc, mode) < 0)){ + bb_perror_msg("line %d: chmod failed for %s", linenum, full_name_inc); + ret = EXIT_FAILURE; + } + } + free(full_name_inc); + } else { + rdev = (major << 8) + minor; + if (mknod(full_name, mode, rdev) == -1) { + bb_perror_msg("line %d: cannot create node %s", linenum, full_name); + ret = EXIT_FAILURE; + } + else if (chown(full_name, uid, gid) == -1) { + bb_perror_msg("line %d: chown failed for %s", linenum, full_name); + ret = EXIT_FAILURE; + } + if ((mode != -1) && (chmod(full_name, mode) < 0)){ + bb_perror_msg("line %d: chmod failed for %s", linenum, full_name); + ret = EXIT_FAILURE; + } + } + } +loop: + free(line); + free(full_name); + } + fclose(table); + + return ret; +} + +#else +# error makedevs configuration error, either leaf or table must be selected +#endif |