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/*
* blockdev.c --- Do various simple block device ioctls from the command line
* aeb, 991028
*/
#include <stdio.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/fs.h>
#include "nls.h"
const char *progname;
struct bdc {
char *name;
char *iocname;
long ioc;
int argtype;
#define ARGNONE 0
#define ARGINTA 1
#define ARGINTP 2
#define ARGINTG 3
#define ARGLINTG 4
long argval;
char *argname;
char *help;
} bdcms[] = {
#ifdef BLKROSET
{ "--setro", "BLKROSET", BLKROSET, ARGINTP, 1, NULL, N_("set read-only") },
{ "--setrw", "BLKROSET", BLKROSET, ARGINTP, 0, NULL, N_("set read-write") },
#endif
#ifdef BLKROGET
{ "--getro", "BLKROGET", BLKROGET, ARGINTG, -1, NULL, N_("get read-only") },
#endif
#ifdef BLKSSZGET
{ "--getss", "BLKSSZGET", BLKSSZGET, ARGINTG, -1, NULL, N_("get sectorsize") },
#endif
#ifdef BLKGETSIZE
{ "--getsize", "BLKGETSIZE", BLKGETSIZE, ARGLINTG, -1, NULL, N_("get size") },
#endif
#ifdef BLKRASET
{ "--setra", "BLKRASET", BLKRASET, ARGINTA, 0, "READAHEAD", N_("set readahead") },
#endif
#ifdef BLKRAGET
{ "--getra", "BLKRAGET", BLKRAGET, ARGLINTG, -1, NULL, N_("get readahead") },
#endif
#ifdef BLKFLSBUF
{ "--flushbufs", "BLKFLSBUF", BLKFLSBUF, ARGNONE, 0, NULL, N_("flush buffers") },
#endif
#ifdef BLKRRPART
{ "--rereadpt", "BLKRRPART", BLKRRPART, ARGNONE, 0, NULL,
N_("reread partition table") },
#endif
};
#define SIZE(a) (sizeof(a)/sizeof((a)[0]))
static void
usage(void) {
int i;
fprintf(stderr, _("Usage: %s [-V] [-v|-q] commands devices\n"), progname);
fprintf(stderr, _("Available commands:\n"));
for (i = 0; i < SIZE(bdcms); i++) {
fprintf(stderr, "\t%s", bdcms[i].name);
if (bdcms[i].argname)
fprintf(stderr, " %s", bdcms[i].argname);
if (bdcms[i].help)
fprintf(stderr, "\t(%s)", _(bdcms[i].help));
fprintf(stderr, "\n");
}
exit(1);
}
int
find_cmd(char *s) {
int j;
for (j = 0; j < SIZE(bdcms); j++)
if (!strcmp(s, bdcms[j].name))
return j;
return -1;
}
void do_commands(int fd, char **argv, int d);
int
main(int argc, char **argv) {
int fd, d, j, k;
char *p;
/* egcs-2.91.66 is buggy and says:
blockdev.c:93: warning: `d' might be used uninitialized */
d = 0;
progname = argv[0];
if ((p = strrchr(progname, '/')) != NULL)
progname = p+1;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
if (argc < 2)
usage();
/* -V not together with commands */
if (!strcmp(argv[1], "-V") || !strcmp(argv[1], "--version")) {
printf("%s from %s\n", progname, util_linux_version);
exit(0);
}
/* do each of the commands on each of the devices */
/* devices start after last command */
for (d = 1; d < argc; d++) {
j = find_cmd(argv[d]);
if (j >= 0) {
if (bdcms[j].argtype == ARGINTA)
d++;
continue;
}
if (!strcmp(argv[d], "--")) {
d++;
break;
}
if (argv[d][0] != '-')
break;
}
if (d >= argc)
usage();
for (k = d; k < argc; k++) {
fd = open(argv[k], O_RDONLY, 0);
if (fd < 0) {
perror(argv[k]);
exit(1);
}
do_commands(fd, argv, d);
}
return 0;
}
void
do_commands(int fd, char **argv, int d) {
int res, i, j;
int iarg;
long larg;
int verbose = 0;
for (i = 1; i < d; i++) {
if (!strcmp(argv[i], "-v")) {
verbose = 1;
continue;
}
if (!strcmp(argv[i], "-q")) {
verbose = 0;
continue;
}
j = find_cmd(argv[i]);
if (j == -1) {
fprintf(stderr, _("%s: Unknown command: %s\n"), progname, argv[i]);
usage();
}
switch(bdcms[j].argtype) {
default:
case ARGNONE:
res = ioctl(fd, bdcms[j].ioc, 0);
break;
case ARGINTA:
if (i == d-1) {
fprintf(stderr, _("%s requires an argument\n"),
bdcms[j].name);
usage();
}
iarg = atoi(argv[++i]);
res = ioctl(fd, bdcms[j].ioc, iarg);
break;
case ARGINTP:
case ARGINTG:
iarg = bdcms[j].argval;
res = ioctl(fd, bdcms[j].ioc, &iarg);
break;
case ARGLINTG:
larg = bdcms[j].argval;
res = ioctl(fd, bdcms[j].ioc, &larg);
break;
}
if (res == -1) {
perror(bdcms[j].iocname);
if (verbose)
printf("%s failed.\n", _(bdcms[j].help));
exit(1);
}
switch(bdcms[j].argtype) {
case ARGINTG:
if (verbose)
printf("%s: %d\n", _(bdcms[j].help), iarg);
else
printf("%d\n", iarg);
break;
case ARGLINTG:
if (verbose)
printf("%s: %ld\n", _(bdcms[j].help), larg);
else
printf("%ld\n", larg);
break;
default:
if (verbose)
printf("%s succeeded.\n", _(bdcms[j].help));
break;
}
}
}
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