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Allow to specify "cache" and "nocache" as an option for

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mount_nullfs(8).

Tested by:	pho
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2013-01-03 19:18:46 +00:00
parent 9cf4c952ca
commit 73a44978ce
1 changed files with 26 additions and 23 deletions
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49
sbin/mount_nullfs/mount_nullfs.c
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@ -57,27 +57,35 @@ static const char rcsid[] =
#include "mntopts.h"
static struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_END
};
int subdir(const char *, const char *);
static void usage(void) __dead2;
int
main(int argc, char *argv[])
{
struct iovec iov[6];
int ch, mntflags;
struct iovec *iov;
char *p, *val;
char source[MAXPATHLEN];
char target[MAXPATHLEN];
char errmsg[255];
int ch, mntflags, iovlen;
char nullfs[] = "nullfs";
iov = NULL;
iovlen = 0;
mntflags = 0;
errmsg[0] = '\0';
while ((ch = getopt(argc, argv, "o:")) != -1)
switch(ch) {
case 'o':
getmntopts(optarg, mopts, &mntflags, 0);
val = strdup("");
p = strchr(optarg, '=');
if (p != NULL) {
free(val);
*p = '\0';
val = p + 1;
}
build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
break;
case '?':
default:
@ -99,21 +107,16 @@ main(int argc, char *argv[])
errx(EX_USAGE, "%s (%s) and %s are not distinct paths",
argv[0], target, argv[1]);
iov[0].iov_base = strdup("fstype");
iov[0].iov_len = sizeof("fstype");
iov[1].iov_base = strdup("nullfs");
iov[1].iov_len = strlen(iov[1].iov_base) + 1;
iov[2].iov_base = strdup("fspath");
iov[2].iov_len = sizeof("fspath");
iov[3].iov_base = source;
iov[3].iov_len = strlen(source) + 1;
iov[4].iov_base = strdup("target");
iov[4].iov_len = sizeof("target");
iov[5].iov_base = target;
iov[5].iov_len = strlen(target) + 1;
if (nmount(iov, 6, mntflags))
err(1, NULL);
build_iovec(&iov, &iovlen, "fstype", nullfs, (size_t)-1);
build_iovec(&iov, &iovlen, "fspath", source, (size_t)-1);
build_iovec(&iov, &iovlen, "target", target, (size_t)-1);
build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
if (nmount(iov, iovlen, mntflags) < 0) {
if (errmsg[0] != 0)
err(1, "%s: %s", source, errmsg);
else
err(1, "%s", source);
}
exit(0);
}