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This change retains "or later" state! No licensing _changes_ here, only form is adjusted (article, space between "GPL" and "v2" and so on). Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
210 lines
5.1 KiB
C
210 lines
5.1 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 "libbb.h"
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#if ENABLE_FEATURE_MAKEDEVS_LEAF
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/*
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makedevs NAME TYPE MAJOR MINOR FIRST LAST [s]
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TYPEs:
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b Block device
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c Character device
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f FIFO
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FIRST..LAST specify numbers appended to NAME.
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If 's' is the last argument, the base device is created as well.
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Examples:
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makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63
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makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8
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*/
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int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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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;
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int Smajor, Sminor, S, E;
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if (argc < 7 || argv[1][0] == '-')
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bb_show_usage();
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basedev = argv[1];
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buf = xasprintf("%s%u", argv[1], (unsigned)-1);
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type = argv[2];
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Smajor = xatoi_positive(argv[3]);
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Sminor = xatoi_positive(argv[4]);
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S = xatoi_positive(argv[5]);
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E = xatoi_positive(argv[6]);
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nodname = argv[7] ? 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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sprintf(buf, "%s%u", basedev, S);
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/* if mode != S_IFCHR and != S_IFBLK,
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* third param in mknod() ignored */
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if (mknod(nodname, mode, makedev(Smajor, Sminor)))
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bb_perror_msg("can't 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 ENABLE_FEATURE_MAKEDEVS_TABLE
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/* Licensed under GPLv2 or later, see file LICENSE in this source tree. */
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int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int makedevs_main(int argc UNUSED_PARAM, char **argv)
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{
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parser_t *parser;
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char *line = (char *)"-";
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int ret = EXIT_SUCCESS;
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opt_complementary = "=1"; /* exactly one param */
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getopt32(argv, "d:", &line);
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argv += optind;
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xchdir(*argv); /* ensure root dir exists */
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umask(0);
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printf("rootdir=%s\ntable=", *argv);
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if (NOT_LONE_DASH(line)) {
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printf("'%s'\n", line);
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} else {
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puts("<stdin>");
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}
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parser = config_open(line);
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while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) {
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int linenum;
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char type;
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unsigned mode = 0755;
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unsigned major = 0;
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unsigned minor = 0;
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unsigned count = 0;
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unsigned increment = 0;
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unsigned 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 = name;
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uid_t uid;
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gid_t gid;
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linenum = parser->lineno;
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if ((2 > sscanf(line, "%40s %c %o %40s %40s %u %u %u %u %u",
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name, &type, &mode, user, group,
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&major, &minor, &start, &increment, &count))
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|| ((unsigned)(major | minor | start | count | increment) > 255)
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) {
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bb_error_msg("invalid line %d: '%s'", linenum, line);
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ret = EXIT_FAILURE;
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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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/* We are already in the right root dir,
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* so make absolute paths relative */
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if ('/' == *full_name)
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full_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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chown_fail:
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bb_perror_msg("line %d: can't chown %s", linenum, full_name);
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ret = EXIT_FAILURE;
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continue;
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}
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if (chmod(full_name, mode) < 0) {
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chmod_fail:
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bb_perror_msg("line %d: can't chmod %s", linenum, full_name);
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ret = EXIT_FAILURE;
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continue;
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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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continue;
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}
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if (chown(full_name, uid, gid) < 0)
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goto chown_fail;
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if (chmod(full_name, mode) < 0)
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goto chmod_fail;
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} else {
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dev_t rdev;
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unsigned i;
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char *full_name_inc;
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if (type == 'p') {
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mode |= S_IFIFO;
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} else if (type == 'c') {
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mode |= S_IFCHR;
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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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continue;
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}
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full_name_inc = xmalloc(strlen(full_name) + sizeof(int)*3 + 2);
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if (count)
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count--;
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for (i = start; i <= start + count; i++) {
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sprintf(full_name_inc, count ? "%s%u" : "%s", full_name, i);
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rdev = makedev(major, minor + (i - start) * increment);
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if (mknod(full_name_inc, mode, rdev) < 0) {
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bb_perror_msg("line %d: can't create node %s", linenum, full_name_inc);
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ret = EXIT_FAILURE;
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} else if (chown(full_name_inc, uid, gid) < 0) {
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bb_perror_msg("line %d: can't chown %s", linenum, full_name_inc);
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ret = EXIT_FAILURE;
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} else if (chmod(full_name_inc, mode) < 0) {
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bb_perror_msg("line %d: can't chmod %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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}
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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config_close(parser);
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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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