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| author | Olaf Hering <olaf@aepfle.de> | 2013-04-24 07:48:51 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-24 09:02:35 -0700 |
| commit | d3d1ee3ab28711360937839423158cc185f710f2 (patch) | |
| tree | a19d46779757647a490f11aff5527630650fde0e | |
| parent | 038336a5b40ceeea394a6eb3e8c6fc75701eec47 (diff) | |
| download | linux-stable-d3d1ee3ab28711360937839423158cc185f710f2.tar.gz linux-stable-d3d1ee3ab28711360937839423158cc185f710f2.tar.bz2 linux-stable-d3d1ee3ab28711360937839423158cc185f710f2.zip | |
tools: hv: use getmntent in hv_vss_daemon
As suggested by Paolo Bonzini, use getmntent instead of parsing output
of mount(1).
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | tools/hv/hv_vss_daemon.c | 39 |
1 files changed, 21 insertions, 18 deletions
diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c index 921c1bec0305..a5da91df4f76 100644 --- a/tools/hv/hv_vss_daemon.c +++ b/tools/hv/hv_vss_daemon.c @@ -23,6 +23,7 @@ #include <sys/poll.h> #include <linux/types.h> #include <stdio.h> +#include <mntent.h> #include <stdlib.h> #include <unistd.h> #include <string.h> @@ -47,11 +48,10 @@ static int vss_operate(int operation) { char *fs_op; char cmd[512]; - char buf[512]; - FILE *file; - char *p; - char *x; - int error = 0; + char match[] = "/dev/"; + FILE *mounts; + struct mntent *ent; + int error = 0, root_seen = 0; switch (operation) { case VSS_OP_FREEZE: @@ -64,25 +64,28 @@ static int vss_operate(int operation) return -1; } - file = popen("mount | awk '/^\\/dev\\// { print $3}'", "r"); - if (file == NULL) + mounts = setmntent("/proc/mounts", "r"); + if (mounts == NULL) return -1; - while ((p = fgets(buf, sizeof(buf), file)) != NULL) { - x = strchr(p, '\n'); - *x = '\0'; - if (!strncmp(p, "/", sizeof("/"))) + while((ent = getmntent(mounts))) { + if (strncmp(ent->mnt_fsname, match, strlen(match))) continue; - - sprintf(cmd, "%s %s %s", "fsfreeze ", fs_op, p); + if (strcmp(ent->mnt_dir, "/") == 0) { + root_seen = 1; + continue; + } + snprintf(cmd, sizeof(cmd), "fsfreeze %s '%s'", fs_op, ent->mnt_dir); syslog(LOG_INFO, "VSS cmd is %s\n", cmd); - error = system(cmd); + error |= system(cmd); } - pclose(file); + endmntent(mounts); - sprintf(cmd, "%s %s %s", "fsfreeze ", fs_op, "/"); - syslog(LOG_INFO, "VSS cmd is %s\n", cmd); - error = system(cmd); + if (root_seen) { + sprintf(cmd, "fsfreeze %s /", fs_op); + syslog(LOG_INFO, "VSS cmd is %s\n", cmd); + error |= system(cmd); + } return error; } |