diff options
Diffstat (limited to 'miscutils/makedevs.c')
-rw-r--r-- | miscutils/makedevs.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/miscutils/makedevs.c b/miscutils/makedevs.c new file mode 100644 index 0000000..be08055 --- /dev/null +++ b/miscutils/makedevs.c @@ -0,0 +1,209 @@ +/* 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 "libbb.h" + +#if ENABLE_FEATURE_MAKEDEVS_LEAF +/* +makedevs NAME TYPE MAJOR MINOR FIRST LAST [s] +TYPEs: +b Block device +c Character device +f FIFO + +FIRST..LAST specify numbers appended to NAME. +If 's' is the last argument, the base device is created as well. +Examples: + makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63 + makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8 +*/ +int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int makedevs_main(int argc, char **argv) +{ + mode_t mode; + char *basedev, *type, *nodname, *buf; + int Smajor, Sminor, S, E; + + if (argc < 7 || argv[1][0] == '-') + bb_show_usage(); + + basedev = argv[1]; + buf = xasprintf("%s%u", argv[1], (unsigned)-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 = argv[7] ? 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) { + sprintf(buf, "%s%u", basedev, S); + + /* if mode != S_IFCHR and != S_IFBLK, + * third param in mknod() ignored */ + if (mknod(nodname, mode, makedev(Smajor, Sminor))) + bb_perror_msg("can't create %s", nodname); + + /*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */ + nodname = buf; + S++; + Sminor++; + } + + return 0; +} + +#elif ENABLE_FEATURE_MAKEDEVS_TABLE + +/* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ + +int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int makedevs_main(int argc UNUSED_PARAM, char **argv) +{ + parser_t *parser; + char *line = (char *)"-"; + int ret = EXIT_SUCCESS; + + opt_complementary = "=1"; /* exactly one param */ + getopt32(argv, "d:", &line); + argv += optind; + + xchdir(*argv); /* ensure root dir exists */ + + umask(0); + + printf("rootdir=%s\ntable=", *argv); + if (NOT_LONE_DASH(line)) { + printf("'%s'\n", line); + } else { + puts("<stdin>"); + } + + parser = config_open(line); + while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) { + int linenum; + char type; + unsigned mode = 0755; + unsigned major = 0; + unsigned minor = 0; + unsigned count = 0; + unsigned increment = 0; + unsigned start = 0; + char name[41]; + char user[41]; + char group[41]; + char *full_name = name; + uid_t uid; + gid_t gid; + + linenum = parser->lineno; + + if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u", + name, &type, &mode, user, group, + &major, &minor, &start, &increment, &count)) + || ((unsigned)(major | minor | start | count | increment) > 255) + ) { + bb_error_msg("invalid line %d: '%s'", linenum, line); + ret = EXIT_FAILURE; + continue; + } + + gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid(); + uid = (*user) ? get_ug_id(user, xuname2uid) : getuid(); + /* We are already in the right root dir, + * so make absolute paths relative */ + if ('/' == *full_name) + full_name++; + + if (type == 'd') { + bb_make_directory(full_name, mode | S_IFDIR, FILEUTILS_RECUR); + if (chown(full_name, uid, gid) == -1) { + chown_fail: + bb_perror_msg("line %d: can't chown %s", linenum, full_name); + ret = EXIT_FAILURE; + continue; + } + if (chmod(full_name, mode) < 0) { + chmod_fail: + bb_perror_msg("line %d: can't chmod %s", linenum, full_name); + ret = EXIT_FAILURE; + continue; + } + } 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; + continue; + } + if (chown(full_name, uid, gid) < 0) + goto chown_fail; + if (chmod(full_name, mode) < 0) + goto chmod_fail; + } else { + dev_t rdev; + unsigned i; + char *full_name_inc; + + 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; + continue; + } + + full_name_inc = xmalloc(strlen(full_name) + sizeof(int)*3 + 2); + if (count) + count--; + for (i = start; i <= start + count; i++) { + sprintf(full_name_inc, count ? "%s%u" : "%s", full_name, i); + rdev = makedev(major, minor + (i - start) * increment); + if (mknod(full_name_inc, mode, rdev) < 0) { + bb_perror_msg("line %d: can't create node %s", linenum, full_name_inc); + ret = EXIT_FAILURE; + } else if (chown(full_name_inc, uid, gid) < 0) { + bb_perror_msg("line %d: can't chown %s", linenum, full_name_inc); + ret = EXIT_FAILURE; + } else if (chmod(full_name_inc, mode) < 0) { + bb_perror_msg("line %d: can't chmod %s", linenum, full_name_inc); + ret = EXIT_FAILURE; + } + } + free(full_name_inc); + } + } + if (ENABLE_FEATURE_CLEAN_UP) + config_close(parser); + + return ret; +} + +#else +# error makedevs configuration error, either leaf or table must be selected +#endif |