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Do our best to determine if the user is attempting an NFS mount when

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the filesystem type isn't given in the command line.  In the case of
an IPv6 address containing ':', one must use the '@' separator for it
to be properly parsed (mount_nfs(8) still needs fixing at the moment
though).

PR:		bin/37230
Reviewed by:	obrien
MFC after:	1 week
This commit is contained in:
Maxime Henrion 2002-04-22 23:03:03 +00:00
parent c1ab4f157d
commit 003dbca6a6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=95289
1 changed files with 19 additions and 6 deletions
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25
sbin/mount/mount.c
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@ -50,6 +50,7 @@ static const char rcsid[] =
#include <sys/stat.h>
#include <sys/wait.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
@ -131,7 +132,7 @@ main(argc, argv)
FILE *mountdfp;
pid_t pid;
int all, ch, i, init_flags, mntsize, rval, have_fstab;
char *options;
char *cp, *ep, *options;
all = init_flags = 0;
options = NULL;
@ -278,13 +279,25 @@ main(argc, argv)
case 2:
/*
* If -t flag has not been specified, the path cannot be
* found, spec contains either a ':' or a '@', and the
* spec is not a file with those characters, then assume
* found, spec contains either a ':' or a '@', then assume
* that an NFS filesystem is being specified ala Sun.
* Check if the hostname contains only allowed characters
* to reduce false positives. IPv6 addresses containing
* ':' will be correctly parsed only if the separator is '@'.
* The definition of a valid hostname is taken from RFC 1034.
*/
if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL &&
access(argv[0], 0) == -1)
vfstype = "nfs";
if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL) ||
((ep = strchr(argv[0], ':')) != NULL)) {
cp = argv[0];
while (cp != ep) {
if (!isdigit(*cp) && !isalpha(*cp) &&
*cp != '.' && *cp != '-' && *cp != ':')
break;
cp++;
}
if (cp == ep)
vfstype = "nfs";
}
rval = mountfs(vfstype,
argv[0], argv[1], init_flags, options, NULL);
break;