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fstabscan() fixes:

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- if _fs_fstab.fs_type is NULL, the line is incorrect, so warn about it
  rather than trying to deference a NULL pointer.
  fixes [bin/13787] by Dave Burgess.
- clear _fs_fstab before each use (just to be sure)
This commit is contained in:
lukem 2001-08-31 00:31:07 +00:00
parent ba96ebc2fd
commit 9839c99d92
1 changed files with 5 additions and 2 deletions
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7
lib/libc/gen/fstab.c
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@ -1,4 +1,4 @@
/* $NetBSD: fstab.c,v 1.22 2000/01/22 22:19:10 mycroft Exp $ */
/* $NetBSD: fstab.c,v 1.23 2001/08/31 00:31:07 lukem Exp $ */
/*
* Copyright (c) 1980, 1988, 1993
@ -38,7 +38,7 @@
#if 0
static char sccsid[] = "@(#)fstab.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: fstab.c,v 1.22 2000/01/22 22:19:10 mycroft Exp $");
__RCSID("$NetBSD: fstab.c,v 1.23 2001/08/31 00:31:07 lukem Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
@ -101,6 +101,7 @@ fstabscan()
FSTAB_RW, FSTAB_RQ, FSTAB_RO, FSTAB_SW, FSTAB_DP, FSTAB_XX, NULL
};
(void)memset(&_fs_fstab, 0, sizeof(_fs_fstab));
for (;;) {
if (!(lp = fgets(line, sizeof(line), _fs_fp)))
return 0;
@ -160,6 +161,8 @@ fstabscan()
if (*tp)
break;
}
if (_fs_fstab.fs_type == NULL)
goto bad;
if (strcmp(_fs_fstab.fs_type, FSTAB_XX) == 0)
continue;
if (cp != NULL)