X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=miscutils%2Fmakedevs.c;h=9e7ca340f5eac0acf38c286e2d60042c95800d24;hb=b60686cc2a9550527a548f9e52ff4dd96bdfe222;hp=0ad12d798ecbc9485a7bf9da190c4301d64b8190;hpb=b6adbf1be29841501cc49917249e85f273e1df7c;p=oweals%2Fbusybox.git diff --git a/miscutils/makedevs.c b/miscutils/makedevs.c index 0ad12d798..9e7ca340f 100644 --- a/miscutils/makedevs.c +++ b/miscutils/makedevs.c @@ -6,30 +6,138 @@ * Make ranges of device files quickly. * known bugs: can't deal with alpha ranges */ +//config:config MAKEDEVS +//config: bool "makedevs" +//config: default y +//config: help +//config: 'makedevs' is a utility used to create a batch of devices with +//config: one command. +//config: +//config: There are two choices for command line behaviour, the interface +//config: as used by LEAF/Linux Router Project, or a device table file. +//config: +//config: 'leaf' is traditionally what busybox follows, it allows multiple +//config: devices of a particluar type to be created per command. +//config: e.g. /dev/hda[0-9] +//config: Device properties are passed as command line arguments. +//config: +//config: 'table' reads device properties from a file or stdin, allowing +//config: a batch of unrelated devices to be made with one command. +//config: User/group names are allowed as an alternative to uid/gid. +//config: +//config:choice +//config: prompt "Choose makedevs behaviour" +//config: depends on MAKEDEVS +//config: default FEATURE_MAKEDEVS_TABLE +//config: +//config:config FEATURE_MAKEDEVS_LEAF +//config: bool "leaf" +//config: +//config:config FEATURE_MAKEDEVS_TABLE +//config: bool "table" +//config: +//config:endchoice + +//applet:IF_MAKEDEVS(APPLET(makedevs, BB_DIR_SBIN, BB_SUID_DROP)) + +//kbuild:lib-$(CONFIG_MAKEDEVS) += makedevs.o + +//usage:#if ENABLE_FEATURE_MAKEDEVS_LEAF +//usage:#define makedevs_trivial_usage +//usage: "NAME TYPE MAJOR MINOR FIRST LAST [s]" +//usage:#define makedevs_full_usage "\n\n" +//usage: "Create a range of block or character special files" +//usage: "\n" +//usage: "\nTYPE is:" +//usage: "\n b Block device" +//usage: "\n c Character device" +//usage: "\n f FIFO, MAJOR and MINOR are ignored" +//usage: "\n" +//usage: "\nFIRST..LAST specify numbers appended to NAME." +//usage: "\nIf 's' is the last argument, the base device is created as well." +//usage: "\n" +//usage: "\nExamples:" +//usage: "\n makedevs /dev/ttyS c 4 66 2 63 -> ttyS2-ttyS63" +//usage: "\n makedevs /dev/hda b 3 0 0 8 s -> hda,hda1-hda8" +//usage: +//usage:#define makedevs_example_usage +//usage: "# makedevs /dev/ttyS c 4 66 2 63\n" +//usage: "[creates ttyS2-ttyS63]\n" +//usage: "# makedevs /dev/hda b 3 0 0 8 s\n" +//usage: "[creates hda,hda1-hda8]\n" +//usage:#endif +//usage: +//usage:#if ENABLE_FEATURE_MAKEDEVS_TABLE +//usage:#define makedevs_trivial_usage +//usage: "[-d device_table] rootdir" +//usage:#define makedevs_full_usage "\n\n" +//usage: "Create a range of special files as specified in a device table.\n" +//usage: "Device table entries take the form of:\n" +//usage: " \n" +//usage: "Where name is the file name, type can be one of:\n" +//usage: " f Regular file\n" +//usage: " d Directory\n" +//usage: " c Character device\n" +//usage: " b Block device\n" +//usage: " p Fifo (named pipe)\n" +//usage: "uid is the user id for the target file, gid is the group id for the\n" +//usage: "target file. The rest of the entries (major, minor, etc) apply to\n" +//usage: "to device special files. A '-' may be used for blank entries." +//usage: +//usage:#define makedevs_example_usage +//usage: "For example:\n" +//usage: " \n" +//usage: "/dev d 755 0 0 - - - - -\n" +//usage: "/dev/console c 666 0 0 5 1 - - -\n" +//usage: "/dev/null c 666 0 0 1 3 0 0 -\n" +//usage: "/dev/zero c 666 0 0 1 5 0 0 -\n" +//usage: "/dev/hda b 640 0 0 3 0 0 0 -\n" +//usage: "/dev/hda b 640 0 0 3 1 1 1 15\n\n" +//usage: "Will Produce:\n" +//usage: "/dev\n" +//usage: "/dev/console\n" +//usage: "/dev/null\n" +//usage: "/dev/zero\n" +//usage: "/dev/hda\n" +//usage: "/dev/hda[0-15]\n" +//usage:#endif #include "libbb.h" -#ifdef CONFIG_FEATURE_MAKEDEVS_LEAF -int makedevs_main(int argc, char **argv); +#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[255]; + char *basedev, *type, *nodname, *buf; int Smajor, Sminor, S, E; - if (argc < 7 || *argv[1]=='-') + 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 = argc == 8 ? basedev : buf; + Smajor = xatoi_positive(argv[3]); + Sminor = xatoi_positive(argv[4]); + S = xatoi_positive(argv[5]); + E = xatoi_positive(argv[6]); + nodname = argv[7] ? basedev : buf; mode = 0660; - switch (type[0]) { case 'c': mode |= S_IFCHR; @@ -45,18 +153,17 @@ int makedevs_main(int argc, char **argv) } 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 */ + sprintf(buf, "%s%u", basedev, S); - if (mknod(nodname, mode, makedev(Smajor, Sminor))) - bb_error_msg("failed to create: %s", nodname); + /* if mode != S_IFCHR and != S_IFBLK, + * third param in mknod() ignored */ + if (mknod(nodname, mode, makedev(Smajor, Sminor)) != 0 + && errno != EEXIST + ) { + bb_perror_msg("can't create '%s'", nodname); + } - if (nodname == basedev) /* ex. /dev/hda - to /dev/hda1 ... */ + /*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */ nodname = buf; S++; Sminor++; @@ -65,164 +172,134 @@ int makedevs_main(int argc, char **argv) return 0; } -#elif defined CONFIG_FEATURE_MAKEDEVS_TABLE +#elif ENABLE_FEATURE_MAKEDEVS_TABLE -/* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ +/* Licensed under GPLv2 or later, see file LICENSE in this source tree. */ -int makedevs_main(int argc, char **argv); -int makedevs_main(int argc, char **argv) +int makedevs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int makedevs_main(int argc UNUSED_PARAM, char **argv) { - FILE *table = stdin; - char *rootdir = NULL; - char *line = NULL; - int linenum = 0; + parser_t *parser; + char *line = (char *)"-"; 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"); - } + opt_complementary = "=1"; /* exactly one param */ + getopt32(argv, "d:", &line); + argv += optind; - xchdir(rootdir); + xchdir(*argv); /* ensure root dir exists */ umask(0); - printf("rootdir=%s\n", rootdir); - if (line) { - printf("table='%s'\n", line); + printf("rootdir=%s\ntable=", *argv); + if (NOT_LONE_DASH(line)) { + printf("'%s'\n", line); } else { - printf("table=\n"); + puts(""); } - while ((line = xmalloc_getline(table))) { + parser = config_open(line); + while (config_read(parser, &line, 1, 1, "# \t", PARSE_NORMAL)) { + int linenum; 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; + 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; + char *full_name = name; uid_t uid; gid_t gid; - linenum++; + 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)) || - ((major | minor | start | count | increment) > 255)) - { - if (*line=='\0' || *line=='#' || isspace(*line)) - continue; - bb_error_msg("line %d invalid: '%s'", linenum, line); + 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; } - if (name[0] == '#') { - continue; - } gid = (*group) ? get_ug_id(group, xgroup2gid) : getgid(); uid = (*user) ? get_ug_id(user, xuname2uid) : getuid(); - full_name = concat_path_file(rootdir, name); + /* 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) { - bb_perror_msg("line %d: chown failed for %s", linenum, full_name); + chown_fail: + bb_perror_msg("line %d: can't chown %s", linenum, full_name); ret = EXIT_FAILURE; - goto loop; + continue; } - if ((mode != -1) && (chmod(full_name, mode) < 0)){ - bb_perror_msg("line %d: chmod failed for %s", linenum, full_name); + if (chmod(full_name, mode) < 0) { + chmod_fail: + bb_perror_msg("line %d: can't chmod %s", linenum, full_name); ret = EXIT_FAILURE; - goto loop; + 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; - 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; + continue; } - } else - { + 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') { + } else if (type == 'c') { mode |= S_IFCHR; - } - else if (type == 'b') { + } else if (type == 'b') { mode |= S_IFBLK; } else { bb_error_msg("line %d: unsupported file type %c", linenum, type); ret = EXIT_FAILURE; - goto loop; + continue; } - 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 = makedev(major, 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 = makedev(major, minor); - if (mknod(full_name, mode, rdev) == -1) { - bb_perror_msg("line %d: cannot create node %s", linenum, full_name); + 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 + && errno != EEXIST + ) { + bb_perror_msg("line %d: can't create node %s", linenum, full_name_inc); ret = EXIT_FAILURE; - } - else if (chown(full_name, uid, gid) == -1) { - bb_perror_msg("line %d: chown failed for %s", linenum, full_name); + } 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; - } - if ((mode != -1) && (chmod(full_name, mode) < 0)){ - bb_perror_msg("line %d: chmod failed for %s", linenum, full_name); + } 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); } -loop: - free(line); - free(full_name); } - fclose(table); + if (ENABLE_FEATURE_CLEAN_UP) + config_close(parser); return ret; }