Imported from util-linux-2.10f tarball.
This commit is contained in:
Karel Zak
parent
7eda085c41
commit
eb63b9b8f4
129 changed files with 24647 additions and 15787 deletions
217
disk-utils/raw.c
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217
disk-utils/raw.c
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/*
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* raw.c: User mode tool to bind and query raw character devices.
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*
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* Stephen Tweedie, 1999
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*
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* This file may be redistributed under the terms of the GNU General
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* Public License, version 2.
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*
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* Copyright Red Hat Software, 1999
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/fcntl.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/sysmacros.h>
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#include <sys/raw.h>
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char * progname;
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int do_query = 0;
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int do_query_all = 0;
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int master_fd;
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int raw_minor;
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void open_raw_ctl(void);
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int query(int minor, int quiet);
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int bind (int minor, int block_major, int block_minor);
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static void usage(int err)
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{
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fprintf(stderr,
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"Usage:\n"
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" %s /dev/rawN <major> <minor>\n"
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" %s /dev/rawN /dev/<blockdev>\n"
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" %s -q /dev/rawN\n"
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" %s -qa\n",
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progname, progname, progname, progname);
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exit(err);
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}
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int main(int argc, char *argv[])
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{
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char c;
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char * raw_name;
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char * block_name;
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int err;
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int block_major, block_minor;
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int i;
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struct stat statbuf;
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progname = argv[0];
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while ((c = getopt(argc, argv, "ahq")) != EOF) {
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switch (c) {
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case 'a':
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do_query_all = 1;
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break;
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case 'h':
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usage(0);
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case 'q':
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do_query = 1;
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break;
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default:
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usage(1);
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}
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}
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/*
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* Check for, and open, the master raw device, /dev/raw
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*/
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open_raw_ctl();
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if (do_query_all) {
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if (optind < argc)
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usage(1);
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for (i=1; i<255; i++)
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query(i, 1);
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exit(0);
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}
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/*
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* It's a bind or a single query. Either way we need a raw device.
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*/
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if (optind >= argc)
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usage(1);
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raw_name = argv[optind++];
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err = stat(raw_name, &statbuf);
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if (err) {
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fprintf (stderr, "Cannot locate raw device '%s' (%s)\n",
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raw_name, strerror(errno));
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exit(2);
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}
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if (!S_ISCHR(statbuf.st_mode)) {
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fprintf (stderr, "raw device '%s' is not a character dev\n",
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raw_name);
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exit(2);
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}
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if (major(statbuf.st_rdev) != RAW_MAJOR) {
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fprintf (stderr, "Device '%s' is not a raw dev\n",
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raw_name);
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exit(2);
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}
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raw_minor = minor(statbuf.st_rdev);
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if (do_query)
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return query(raw_minor, 0);
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/*
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* It's not a query, so we still have some parsing to do. Have
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* we been given a block device filename or a major/minor pair?
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*/
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switch (argc - optind) {
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case 1:
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block_name = argv[optind];
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err = stat(block_name, &statbuf);
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if (err) {
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fprintf (stderr,
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"Cannot locate block device '%s' (%s)\n",
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block_name, strerror(errno));
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exit(2);
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}
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if (!S_ISBLK(statbuf.st_mode)) {
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fprintf (stderr, "Device '%s' is not a block dev\n",
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block_name);
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exit(2);
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}
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block_major = major(statbuf.st_rdev);
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block_minor = minor(statbuf.st_rdev);
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break;
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case 2:
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block_major = strtol(argv[optind], 0, 0);
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block_minor = strtol(argv[optind+1], 0, 0);
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break;
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default:
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usage(1);
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}
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return bind(raw_minor, block_major, block_minor);
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return 0;
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}
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void open_raw_ctl(void)
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{
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master_fd = open("/dev/raw", O_RDWR, 0);
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if (master_fd < 0) {
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fprintf (stderr,
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"Cannot open master raw device '/dev/raw' (%s)\n",
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strerror(errno));
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exit(2);
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}
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}
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int query(int minor, int quiet)
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{
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struct raw_config_request rq;
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int err;
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rq.raw_minor = minor;
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err = ioctl(master_fd, RAW_GETBIND, &rq);
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if (err < 0) {
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if (quiet && errno == ENODEV)
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return 3;
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fprintf (stderr,
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"Error querying raw device (%s)\n",
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strerror(errno));
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exit(3);
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}
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if (quiet && !rq.block_major && !rq.block_minor)
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return 0;
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printf ("/dev/raw%d: bound to major %d, minor %d\n",
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minor, (int) rq.block_major, (int) rq.block_minor);
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return 0;
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}
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int bind(int minor, int block_major, int block_minor)
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{
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struct raw_config_request rq;
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int err;
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rq.raw_minor = minor;
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rq.block_major = block_major;
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rq.block_minor = block_minor;
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err = ioctl(master_fd, RAW_SETBIND, &rq);
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if (err < 0) {
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fprintf (stderr,
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"Error setting raw device (%s)\n",
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strerror(errno));
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exit(3);
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}
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printf ("/dev/raw%d: bound to major %d, minor %d\n",
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raw_minor, (int) rq.block_major, (int) rq.block_minor);
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return 0;
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}
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