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authorShirish Pargaonkar <shirishpargaonkar@gmail.com>2011-10-19 14:18:07 -0400
committerJeff Layton <jlayton@samba.org>2011-10-19 14:18:07 -0400
commitc55ad41d1a11e897b4db166f800d4abd71d86652 (patch)
tree56ef0230045fba88a19c2bf0d9da1f481cf16edb /mount.cifs.c
parenta31ff1481f4dc633d2f32d1e0772d1da9b5dee46 (diff)
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mount.cifs: Add mount options for backup intent and their manpages (try #8)
Add mount options backupuid and backugid and their manpage contents. Check for either a valid uid/gid or valid user/group name. Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Diffstat (limited to 'mount.cifs.c')
-rw-r--r--mount.cifs.c80
1 files changed, 78 insertions, 2 deletions
diff --git a/mount.cifs.c b/mount.cifs.c
index 1e3d534..147f7fc 100644
--- a/mount.cifs.c
+++ b/mount.cifs.c
@@ -158,6 +158,8 @@
#define OPT_MAND 27
#define OPT_NOMAND 28
#define OPT_CRUID 29
+#define OPT_BKUPUID 30
+#define OPT_BKUPGID 31
/* struct for holding parsed mount info for use by privleged process */
@@ -843,6 +845,10 @@ static int parse_opt_token(const char *token)
return OPT_REMOUNT;
if (strncmp(token, "_netdev", 7) == 0)
return OPT_IGNORE;
+ if (strncmp(token, "backupuid", 9) == 0)
+ return OPT_BKUPUID;
+ if (strncmp(token, "backupgid", 9) == 0)
+ return OPT_BKUPGID;
return OPT_ERROR;
}
@@ -858,11 +864,13 @@ parse_options(const char *data, struct parsed_mount_info *parsed_info)
int out_len = 0;
int word_len;
int rc = 0;
+ int got_bkupuid = 0;
+ int got_bkupgid = 0;
int got_uid = 0;
int got_cruid = 0;
int got_gid = 0;
- uid_t uid, cruid = 0;
- gid_t gid;
+ uid_t uid, cruid = 0, bkupuid;
+ gid_t gid, bkupgid;
char *ep;
struct passwd *pw;
struct group *gr;
@@ -1171,6 +1179,42 @@ parse_options(const char *data, struct parsed_mount_info *parsed_info)
break;
case OPT_IGNORE:
goto nocopy;
+ case OPT_BKUPUID:
+ if (!value || !*value)
+ goto nocopy;
+
+ got_bkupuid = 1;
+ bkupuid = strtoul(value, &ep, 10);
+ if (!strlen(ep))
+ goto nocopy;
+
+ pw = getpwnam(value);
+ if (pw == NULL) {
+ fprintf(stderr,
+ "bad user name \"%s\"\n", value);
+ return EX_USAGE;
+ }
+
+ bkupuid = pw->pw_uid;
+ goto nocopy;
+ case OPT_BKUPGID:
+ if (!value || !*value)
+ goto nocopy;
+
+ got_bkupgid = 1;
+ bkupgid = strtoul(value, &ep, 10);
+ if (!strlen(ep))
+ goto nocopy;
+
+ gr = getgrnam(value);
+ if (gr == NULL) {
+ fprintf(stderr,
+ "bad group name \"%s\"\n", value);
+ return EX_USAGE;
+ }
+
+ bkupgid = gr->gr_gid;
+ goto nocopy;
}
/* check size before copying option to buffer */
@@ -1246,6 +1290,38 @@ nocopy:
}
snprintf(out + out_len, word_len + 5, "gid=%s", txtbuf);
}
+ if (got_bkupuid) {
+ word_len = snprintf(txtbuf, sizeof(txtbuf), "%u", bkupuid);
+
+ /* comma + "backupuid=" + terminating NULL == 12 */
+ if (out_len + word_len + 12 > MAX_OPTIONS_LEN) {
+ fprintf(stderr, "Options string too long\n");
+ return EX_USAGE;
+ }
+
+ if (out_len) {
+ strlcat(out, ",", MAX_OPTIONS_LEN);
+ out_len++;
+ }
+ snprintf(out + out_len, word_len + 11, "backupuid=%s", txtbuf);
+ out_len = strlen(out);
+ }
+ if (got_bkupgid) {
+ word_len = snprintf(txtbuf, sizeof(txtbuf), "%u", bkupgid);
+
+ /* comma + "backkupgid=" + terminating NULL == 12 */
+ if (out_len + word_len + 12 > MAX_OPTIONS_LEN) {
+ fprintf(stderr, "Options string too long\n");
+ return EX_USAGE;
+ }
+
+ if (out_len) {
+ strlcat(out, ",", MAX_OPTIONS_LEN);
+ out_len++;
+ }
+ snprintf(out + out_len, word_len + 11, "backupgid=%s", txtbuf);
+ }
+
return 0;
}