proper include path

[unix-history] / usr / src / sbin / umount / umount.c

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint

#ifndef lint
static char sccsid[] = "@(#)umount.c    5.3 (Berkeley) %G%";
#endif not lint

/*
* umount
*/
#include <sys/param.h>
#include <sys/mount.h>

#include <stdio.h>
#include <fstab.h>
#include <mtab.h>

struct  mtab mtab[NMOUNT];

char    *rindex();
int     vflag, all, errs;

main(argc, argv)
       int argc;
       char **argv;
{
       register struct mtab *mp;
       register char *p1, *p2;
       int mf;

       argc--, argv++;
       sync();
       mf = open("/etc/mtab", 0);
       read(mf, (char *)mtab, sizeof (mtab));
again:
       if (argc > 0 && !strcmp(*argv, "-v")) {
               vflag++;
               argc--, argv++;
               goto again;
       }
       if (argc > 0 && !strcmp(*argv, "-a")) {
               all++;
               argc--, argv++;
               goto again;
       }
       if (argc == 0 && !all) {
               fprintf(stderr, "Usage: umount [ -a ] [ -v ] [ dev ... ]\n");
               exit(1);
       }
       if (all) {
               if (setfsent() == 0)
                       perror(FSTAB), exit(1);
               umountall();
               exit(0);
       }
       while (argc > 0) {
               if (umountfs(*argv++) == 0)
                       errs++;
               argc--;
       }
       exit(errs);
}

umountall()
{
       struct fstab *fs, *allocfsent();

       if ((fs = getfsent()) == 0)
               return;
       fs = allocfsent(fs);
       umountall();
       if (strcmp(fs->fs_file, "/") == 0) {
               freefsent(fs);
               return;
       }
       if (strcmp(fs->fs_type, FSTAB_RW) &&
           strcmp(fs->fs_type, FSTAB_RO) &&
           strcmp(fs->fs_type, FSTAB_RQ)) {
               freefsent(fs);
               return;
       }
       if (umountfs(fs->fs_file) < 0)
               perror(fs->fs_file);
       freefsent(fs);
}

struct fstab *
allocfsent(fs)
       register struct fstab *fs;
{
       register struct fstab *new;
       register char *cp;
       char *malloc();

       new = (struct fstab *)malloc(sizeof (*fs));
       cp = malloc(strlen(fs->fs_file) + 1);
       strcpy(cp, fs->fs_file);
       new->fs_file = cp;
       cp = malloc(strlen(fs->fs_type) + 1);
       strcpy(cp, fs->fs_type);
       new->fs_type = cp;
       cp = malloc(strlen(fs->fs_spec) + 1);
       strcpy(cp, fs->fs_spec);
       new->fs_spec = cp;
       new->fs_passno = fs->fs_passno;
       new->fs_freq = fs->fs_freq;
       return (new);
}

freefsent(fs)
       register struct fstab *fs;
{

       if (fs->fs_file)
               free(fs->fs_file);
       if (fs->fs_spec)
               free(fs->fs_spec);
       if (fs->fs_type)
               free(fs->fs_type);
       free((char *)fs);
}

struct  mtab zeromtab;

umountfs(name)
       char *name;
{
       register char *p1, *p2;
       register struct mtab *mp;
       int mf;
       struct fstab *fs;

       fs = getfsspec(name);
       if (fs != NULL)
               name = fs->fs_file;
       if (umount(name, MNT_NOFORCE) < 0) {
               perror(name);
               return (0);
       }
       if (vflag)
               fprintf(stderr, "%s: Unmounted\n", name);
       for (mp = mtab; mp < &mtab[NMOUNT]; mp++) {
               if (strncmp(mp->m_path, name, sizeof (mp->m_path)))
                       continue;
               *mp = zeromtab;
               for (mp = &mtab[NMOUNT]; mp >= mtab; mp--)
                       if (mp->m_path[0])
                               break;
               mp++;
               mf = creat("/etc/mtab", 0644);
               write(mf, (char *)mtab, (mp-mtab) * sizeof (struct mtab));
               return (1);
       }
       fprintf(stderr, "%s: Not mounted\n", name);
       return (0);
}