use correct buffer size; use strtok(3), delete fsskip() and fsdigit();

[unix-history] / usr / src / lib / libc / gen / fstab.c

/*
* Copyright (c) 1980, 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)fstab.c     5.4 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

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

static  struct fstab fs;
static  FILE *fs_file = NULL;
static  char line[BUFSIZ+1];

static
fstabscan(fsp)
       register struct fstab *fsp;
{
       register char *cp;
       char *fgets(), *strtok();

       for (;;) {
               if (!(cp = fgets(line, sizeof(line), fs_file)))
                       return(1);
               fsp->fs_spec = strtok(cp, ":\n");
               fsp->fs_file = strtok((char *)NULL, ":\n");
               fsp->fs_type = strtok((char *)NULL, ":\n");
               if (fsp->fs_type && strcmp(fsp->fs_type, FSTAB_XX)) {
                       if (!(cp = strtok((char *)NULL, ":\n")))
                               continue;
                       fsp->fs_freq = atoi(cp);
                       if (!(cp = strtok((char *)NULL, ":\n")))
                               continue;
                       fsp->fs_passno = atoi(cp);
                       return(0);
               }
       }
       /* NOTREACHED */
}

setfsent()
{
       if (fs_file)
               (void)endfsent();
       if ((fs_file = fopen(FSTAB, "r")) == NULL) {
               fs_file = NULL;
               return(0);
       }
       return(1);
}

endfsent()
{
       if (fs_file) {
               (void)fclose(fs_file);
               fs_file = NULL;
       }
       return(1);
}

struct fstab *
getfsent()
{
       if (fs_file == NULL && !setfsent() || fstabscan(&fs))
               return((struct fstab *)NULL);
       return(&fs);
}

struct fstab *
getfsspec(name)
       register char *name;
{
       register struct fstab *fsp;

       if (!setfsent())                /* start from the beginning */
               return((struct fstab *)NULL);
       while (fsp = getfsent())
               if (!strcmp(fsp->fs_spec, name))
                       return(fsp);
       return((struct fstab *)NULL);
}

struct fstab *
getfsfile(name)
       register char *name;
{
       register struct fstab *fsp;

       if (!setfsent())                /* start from the beginning */
               return((struct fstab *)NULL);
       while (fsp = getfsent())
               if (!strcmp(fsp->fs_file, name))
                       return(fsp);
       return((struct fstab *)NULL);
}