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libmisc/btrfs: find btrfs command

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Ubuntu for instance keeps it in /bin, not /sbin.  So look
for it in our usual places.

Signed-off-by: Serge Hallyn <shallyn@cisco.com>
This commit is contained in:
Serge Hallyn 2019-05-03 19:33:23 -07:00
parent 816220f90c
commit 51cfc1f89a
1 changed files with 23 additions and 1 deletions
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24
libmisc/btrfs.c
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@ -1,14 +1,36 @@
#include <linux/btrfs_tree.h>
#include <linux/magic.h>
#include <sys/statfs.h>
#include <stdbool.h>
#include "prototypes.h"
static bool path_exists(const char *p)
{
int ret;
struct stat sb;
return stat(p, &sb) == 0;
}
static const char *btrfs_cmd(void)
{
const char *btrfs_paths[] = {"/sbin/btrfs",
"/bin/btrfs", "/usr/sbin/btrfs", "/usr/bin/btrfs", NULL};
const char *p;
int i;
for (i = 0, p = btrfs_paths[i]; p; i++, p = btrfs_paths[i])
if (path_exists(p))
return p;
return NULL;
}
static int run_btrfs_subvolume_cmd(const char *subcmd, const char *arg1, const char *arg2)
{
int status = 0;
const char *cmd = "/sbin/btrfs";
const char *cmd = btrfs_cmd();
const char *argv[] = {
strrchr(cmd, '/'),
"subvolume",