347 lines
7.4 KiB
C
347 lines
7.4 KiB
C
/*
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* blockdev.c --- Do various simple block device ioctls from the command line
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* aeb, 991028
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*/
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#include <stdio.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include "nls.h"
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/* Since it is impossible to include <linux/fs.h>, let us
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give the ioctls explicitly. */
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#ifndef BLKROSET
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#define BLKROSET _IO(0x12,93)
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#define BLKROGET _IO(0x12,94)
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#define BLKRRPART _IO(0x12,95)
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#define BLKGETSIZE _IO(0x12,96)
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#define BLKFLSBUF _IO(0x12,97)
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#define BLKRASET _IO(0x12,98)
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#define BLKRAGET _IO(0x12,99)
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#define BLKSSZGET _IO(0x12,104)
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#define BLKBSZGET _IOR(0x12,112,sizeof(int))
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#define BLKBSZSET _IOW(0x12,113,sizeof(int))
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#endif
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/* Maybe <linux/hdreg.h> could be included */
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#ifndef HDIO_GETGEO
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#define HDIO_GETGEO 0x0301
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struct hd_geometry {
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unsigned char heads;
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unsigned char sectors;
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unsigned short cylinders; /* truncated */
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unsigned long start;
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};
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#endif
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const char *progname;
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struct bdc {
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char *name;
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char *iocname;
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long ioc;
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int argtype;
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#define ARGNONE 0
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#define ARGINTA 1
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#define ARGINTAP 2
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#define ARGINTP 3
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#define ARGINTG 4
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#define ARGLINTG 5
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long argval;
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char *argname;
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char *help;
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} bdcms[] = {
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#ifdef BLKROSET
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{ "--setro", "BLKROSET", BLKROSET, ARGINTP, 1, NULL, N_("set read-only") },
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{ "--setrw", "BLKROSET", BLKROSET, ARGINTP, 0, NULL, N_("set read-write") },
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#endif
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#ifdef BLKROGET
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{ "--getro", "BLKROGET", BLKROGET, ARGINTG, -1, NULL, N_("get read-only") },
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#endif
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#ifdef BLKSSZGET
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{ "--getss", "BLKSSZGET", BLKSSZGET, ARGINTG, -1, NULL, N_("get sectorsize") },
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#endif
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#ifdef BLKBSZGET
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{ "--getbsz", "BLKBSZGET", BLKBSZGET, ARGINTG, -1, NULL, N_("get blocksize") },
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#endif
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#ifdef BLKBSZSET
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{ "--setbsz", "BLKBSZSET", BLKBSZSET, ARGINTAP, 0, "BLOCKSIZE", N_("set blocksize") },
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#endif
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#ifdef BLKGETSIZE
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{ "--getsize", "BLKGETSIZE", BLKGETSIZE, ARGLINTG, -1, NULL, N_("get size") },
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#endif
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#ifdef BLKRASET
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{ "--setra", "BLKRASET", BLKRASET, ARGINTA, 0, "READAHEAD", N_("set readahead") },
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#endif
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#ifdef BLKRAGET
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{ "--getra", "BLKRAGET", BLKRAGET, ARGLINTG, -1, NULL, N_("get readahead") },
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#endif
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#ifdef BLKFLSBUF
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{ "--flushbufs", "BLKFLSBUF", BLKFLSBUF, ARGNONE, 0, NULL, N_("flush buffers") },
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#endif
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#ifdef BLKRRPART
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{ "--rereadpt", "BLKRRPART", BLKRRPART, ARGNONE, 0, NULL,
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N_("reread partition table") },
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#endif
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};
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#define SIZE(a) (sizeof(a)/sizeof((a)[0]))
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static void
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usage(void) {
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int i;
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fprintf(stderr, _("Usage:\n"));
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fprintf(stderr, " %s -V\n", progname);
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fprintf(stderr, _(" %s --report [devices]\n"), progname);
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fprintf(stderr, _(" %s [-v|-q] commands devices\n"), progname);
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fprintf(stderr, _("Available commands:\n"));
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for (i = 0; i < SIZE(bdcms); i++) {
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fprintf(stderr, "\t%s", bdcms[i].name);
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if (bdcms[i].argname)
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fprintf(stderr, " %s", bdcms[i].argname);
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if (bdcms[i].help)
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fprintf(stderr, "\t(%s)", _(bdcms[i].help));
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fprintf(stderr, "\n");
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}
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exit(1);
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}
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static int
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find_cmd(char *s) {
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int j;
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for (j = 0; j < SIZE(bdcms); j++)
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if (!strcmp(s, bdcms[j].name))
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return j;
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return -1;
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}
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void do_commands(int fd, char **argv, int d);
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void report_header(void);
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void report_device(char *device, int quiet);
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void report_all_devices(void);
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int
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main(int argc, char **argv) {
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int fd, d, j, k;
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char *p;
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/* egcs-2.91.66 is buggy and says:
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blockdev.c:93: warning: `d' might be used uninitialized */
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d = 0;
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progname = argv[0];
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if ((p = strrchr(progname, '/')) != NULL)
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progname = p+1;
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setlocale(LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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if (argc < 2)
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usage();
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/* -V not together with commands */
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if (!strcmp(argv[1], "-V") || !strcmp(argv[1], "--version")) {
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printf("%s from %s\n", progname, util_linux_version);
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exit(0);
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}
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/* --report not together with other commands */
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if (!strcmp(argv[1], "--report")) {
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report_header();
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if (argc > 2) {
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for (d = 2; d < argc; d++)
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report_device(argv[d], 0);
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} else {
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report_all_devices();
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}
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exit(0);
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}
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/* do each of the commands on each of the devices */
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/* devices start after last command */
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for (d = 1; d < argc; d++) {
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j = find_cmd(argv[d]);
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if (j >= 0) {
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if (bdcms[j].argtype == ARGINTA ||
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bdcms[j].argtype == ARGINTAP)
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d++;
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continue;
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}
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if (!strcmp(argv[d], "--")) {
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d++;
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break;
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}
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if (argv[d][0] != '-')
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break;
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}
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if (d >= argc)
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usage();
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for (k = d; k < argc; k++) {
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fd = open(argv[k], O_RDONLY, 0);
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if (fd < 0) {
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perror(argv[k]);
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exit(1);
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}
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do_commands(fd, argv, d);
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close(fd);
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}
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return 0;
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}
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void
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do_commands(int fd, char **argv, int d) {
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int res, i, j;
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int iarg;
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long larg;
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int verbose = 0;
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for (i = 1; i < d; i++) {
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if (!strcmp(argv[i], "-v")) {
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verbose = 1;
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continue;
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}
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if (!strcmp(argv[i], "-q")) {
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verbose = 0;
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continue;
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}
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j = find_cmd(argv[i]);
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if (j == -1) {
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fprintf(stderr, _("%s: Unknown command: %s\n"),
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progname, argv[i]);
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usage();
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}
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switch(bdcms[j].argtype) {
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default:
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case ARGNONE:
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res = ioctl(fd, bdcms[j].ioc, 0);
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break;
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case ARGINTA:
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if (i == d-1) {
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fprintf(stderr, _("%s requires an argument\n"),
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bdcms[j].name);
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usage();
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}
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iarg = atoi(argv[++i]);
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res = ioctl(fd, bdcms[j].ioc, iarg);
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break;
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case ARGINTAP:
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if (i == d-1) {
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fprintf(stderr, _("%s requires an argument\n"),
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bdcms[j].name);
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usage();
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}
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iarg = atoi(argv[++i]);
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res = ioctl(fd, bdcms[j].ioc, &iarg);
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break;
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case ARGINTP:
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case ARGINTG:
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iarg = bdcms[j].argval;
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res = ioctl(fd, bdcms[j].ioc, &iarg);
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break;
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case ARGLINTG:
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larg = bdcms[j].argval;
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res = ioctl(fd, bdcms[j].ioc, &larg);
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break;
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}
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if (res == -1) {
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perror(bdcms[j].iocname);
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if (verbose)
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printf("%s failed.\n", _(bdcms[j].help));
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exit(1);
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}
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switch(bdcms[j].argtype) {
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case ARGINTG:
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if (verbose)
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printf("%s: %d\n", _(bdcms[j].help), iarg);
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else
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printf("%d\n", iarg);
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break;
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case ARGLINTG:
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if (verbose)
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printf("%s: %ld\n", _(bdcms[j].help), larg);
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else
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printf("%ld\n", larg);
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break;
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default:
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if (verbose)
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printf(_("%s succeeded.\n"), _(bdcms[j].help));
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break;
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}
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}
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}
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#define PROC_PARTITIONS "/proc/partitions"
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void
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report_all_devices(void) {
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FILE *procpt;
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char line[200];
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char ptname[200];
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char device[210];
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int ma, mi, sz;
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procpt = fopen(PROC_PARTITIONS, "r");
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if (!procpt) {
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fprintf(stderr, _("%s: cannot open %s\n"),
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progname, PROC_PARTITIONS);
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exit(1);
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}
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while (fgets(line, sizeof(line), procpt)) {
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if (sscanf (line, " %d %d %d %[^\n ]",
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&ma, &mi, &sz, ptname) != 4)
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continue;
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sprintf(device, "/dev/%s", ptname);
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report_device(device, 1);
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}
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}
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void
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report_device(char *device, int quiet) {
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int fd;
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int ro, ssz, bsz;
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long ra, sz, ss;
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struct hd_geometry g;
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fd = open(device, O_RDONLY | O_NONBLOCK);
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if (fd < 0) {
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if (!quiet)
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fprintf(stderr, _("%s: cannot open %s\n"),
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progname, device);
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return;
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}
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ro = ssz = bsz = 0;
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g.start = ra = sz = ss = 0;
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if (ioctl (fd, BLKROGET, &ro) == 0 &&
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ioctl (fd, BLKRAGET, &ra) == 0 &&
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ioctl (fd, BLKSSZGET, &ssz) == 0 &&
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ioctl (fd, BLKBSZGET, &bsz) == 0 &&
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ioctl (fd, BLKGETSIZE, &sz) == 0 &&
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ioctl (fd, HDIO_GETGEO, &g) == 0) {
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printf("%s %5ld %5d %5d %10ld %10ld %s\n",
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ro ? "ro" : "rw", ra, ssz, bsz, g.start, sz, device);
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} else {
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if (!quiet)
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fprintf(stderr, _("%s: ioctl error on %s\n"),
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progname, device);
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}
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}
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void
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report_header() {
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printf(_("RO RA SSZ BSZ StartSec Size Device\n"));
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}
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