143 lines
3.2 KiB
C
143 lines
3.2 KiB
C
/* mount - mount a file system Author: Andy Tanenbaum */
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#include <errno.h>
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#include <sys/types.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <dirent.h>
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#include <string.h>
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#include <sys/mount.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/minlib.h>
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#include <sys/svrctl.h>
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#include <stdio.h>
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#include "mfs/const.h"
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#define MINIX_FS_TYPE "mfs"
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_PROTOTYPE(int main, (int argc, char **argv));
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_PROTOTYPE(void list, (void));
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_PROTOTYPE(void usage, (void));
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int main(argc, argv)
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int argc;
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char *argv[];
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{
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int i, n, v, mountflags;
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char **ap, *vs, *opt, *err, *type, *args, *device;
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char special[PATH_MAX+1], mounted_on[PATH_MAX+1], version[10], rw_flag[10];
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if (argc == 1) list(); /* just list /etc/mtab */
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mountflags = 0;
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type = NULL;
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args = NULL;
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ap = argv+1;
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for (i = 1; i < argc; i++) {
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if (argv[i][0] == '-') {
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opt = argv[i]+1;
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while (*opt != 0) switch (*opt++) {
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case 'r': mountflags |= MS_RDONLY; break;
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case 't': if (++i == argc) usage();
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type = argv[i];
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break;
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case 'i': mountflags |= MS_REUSE; break;
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case 'o': if (++i == argc) usage();
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args = argv[i];
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break;
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default: usage();
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}
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} else {
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*ap++ = argv[i];
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}
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}
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*ap = NULL;
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argc = (ap - argv);
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if (argc != 3 || *argv[1] == 0) usage();
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device = argv[1];
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if (!strcmp(device, "none")) device = NULL;
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if (mount(device, argv[2], mountflags, type, args) < 0) {
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err = strerror(errno);
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fprintf(stderr, "mount: Can't mount %s on %s: %s\n",
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argv[1], argv[2], err);
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exit(1);
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}
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/* The mount has completed successfully. Tell the user. */
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printf("%s is read-%s mounted on %s\n",
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argv[1], mountflags & MS_RDONLY ? "only" : "write", argv[2]);
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/* Update /etc/mtab. */
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n = load_mtab("mount");
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if (n < 0) exit(1); /* something is wrong. */
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/* Loop on all the /etc/mtab entries, copying each one to the output buf. */
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while (1) {
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n = get_mtab_entry(special, mounted_on, version, rw_flag);
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if (n < 0) break;
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n = put_mtab_entry(special, mounted_on, version, rw_flag);
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if (n < 0) {
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std_err("mount: /etc/mtab has grown too large\n");
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exit(1);
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}
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}
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/* For MFS, use a version number. Otherwise, use the FS type name. */
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if (type == NULL || !strcmp(type, MINIX_FS_TYPE)) {
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v = fsversion(argv[1], "mount");
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if (v == 1)
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vs = "1";
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else if (v == 2)
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vs = "2";
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else if (v == 3)
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vs = "3";
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else
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vs = "0";
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} else {
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/* Keep the version field sufficiently short. */
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if (strlen(type) < sizeof(version))
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vs = type;
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else
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vs = "-";
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}
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n = put_mtab_entry(argv[1], argv[2], vs,
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(mountflags & MS_RDONLY ? "ro" : "rw") );
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if (n < 0) {
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std_err("mount: /etc/mtab has grown too large\n");
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exit(1);
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}
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n = rewrite_mtab("mount");
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return(0);
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}
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void list()
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{
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int n;
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char special[PATH_MAX+1], mounted_on[PATH_MAX+1], version[10], rw_flag[10];
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/* Read and print /etc/mtab. */
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n = load_mtab("mount");
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if (n < 0) exit(1);
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while (1) {
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n = get_mtab_entry(special, mounted_on, version, rw_flag);
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if (n < 0) break;
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printf("%s is read-%s mounted on %s (type %s)\n",
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special, strcmp(rw_flag, "rw") == 0 ? "write" : "only",
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mounted_on, version);
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}
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exit(0);
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}
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void usage()
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{
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std_err("Usage: mount [-r] [-t type] [-o options] special name\n");
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exit(1);
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}
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