busybox/miscutils/makedevs.c

312 lines
9.0 KiB
C
Raw Normal View History

/* 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
*/
//config:config MAKEDEVS
//config: bool "makedevs (9.3 kb)"
//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_NOEXEC(makedevs, makedevs, BB_DIR_SBIN, BB_SUID_DROP, makedevs))
//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: "<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>\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: "<name> <type> <mode><uid><gid><major><minor><start><inc><count>\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"
2007-08-13 16:06:25 +05:30
#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)
1999-10-05 21:54:54 +05:30
{
mode_t mode;
char *basedev, *type, *nodname, *buf;
int Smajor, Sminor, S, E;
1999-10-05 21:54:54 +05:30
if (argc < 7 || argv[1][0] == '-')
2003-03-19 14:43:01 +05:30
bb_show_usage();
basedev = argv[1];
buf = xasprintf("%s%u", argv[1], (unsigned)-1);
type = argv[2];
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;
1999-10-05 21:54:54 +05:30
switch (type[0]) {
case 'c':
mode |= S_IFCHR;
break;
case 'b':
mode |= S_IFBLK;
break;
case 'f':
mode |= S_IFIFO;
break;
default:
2003-03-19 14:43:01 +05:30
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)) != 0
&& errno != EEXIST
) {
bb_perror_msg("can't create '%s'", nodname);
}
/*if (nodname == basedev)*/ /* ex. /dev/hda - to /dev/hda1 ... */
nodname = buf;
S++;
Sminor++;
1999-10-05 21:54:54 +05:30
}
return 0;
1999-10-05 21:54:54 +05:30
}
2007-08-13 16:06:25 +05:30
#elif ENABLE_FEATURE_MAKEDEVS_TABLE
/* Licensed under GPLv2 or later, see file LICENSE in this source tree. */
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;
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
getopt32(argv, "^" "d:" "\0" "=1", &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 user[41];
char group[41];
char *full_name;
int name_len;
uid_t uid;
gid_t gid;
linenum = parser->lineno;
if ((1 > sscanf(line, "%*s%n %c %o %40s %40s %u %u %u %u %u",
&name_len, &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();
line[name_len] = '\0';
full_name = line;
/* We are already in the right root dir,
* so make absolute paths relative */
if ('/' == full_name[0])
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;
2007-08-13 16:06:25 +05:30
} else {
unsigned i;
if (type == 'p') {
mode |= S_IFIFO;
} else if (type == 'c') {
mode |= S_IFCHR;
} else if (type == 'b') {
mode |= S_IFBLK;
} else {
2005-07-18 15:15:35 +05:30
bb_error_msg("line %d: unsupported file type %c", linenum, type);
ret = EXIT_FAILURE;
continue;
}
if (count != 0)
count--;
for (i = 0; i <= count; i++) {
dev_t rdev;
char *nameN = full_name;
if (count != 0)
nameN = xasprintf("%s%u", full_name, start + i);
rdev = makedev(major, minor + i * increment);
if (mknod(nameN, mode, rdev) != 0
&& errno != EEXIST
) {
bb_perror_msg("line %d: can't create node %s", linenum, nameN);
ret = EXIT_FAILURE;
} else if (chown(nameN, uid, gid) < 0) {
bb_perror_msg("line %d: can't chown %s", linenum, nameN);
ret = EXIT_FAILURE;
} else if (chmod(nameN, mode) < 0) {
bb_perror_msg("line %d: can't chmod %s", linenum, nameN);
ret = EXIT_FAILURE;
}
if (count != 0)
free(nameN);
}
}
}
if (ENABLE_FEATURE_CLEAN_UP)
config_close(parser);
return ret;
1999-10-05 21:54:54 +05:30
}
#else
2006-03-24 20:00:05 +05:30
# error makedevs configuration error, either leaf or table must be selected
#endif