LU-1581 utils: more common helpers

[fs/lustre-release.git] / lustre / utils / mount_utils.c

diff --git a/lustre/utils/mount_utils.c b/lustre/utils/mount_utils.c
index edb07fe..e6769ea 100644 (file)
--- a/lustre/utils/mount_utils.c
+++ b/lustre/utils/mount_utils.c
@@ -157,6 +157,62 @@ char *strscpy(char *dst, char *src, int buflen)
        return strscat(dst, src, buflen);
 }
 
+int check_mtab_entry(char *spec1, char *spec2, char *mtpt, char *type)
+{
+       FILE *fp;
+       struct mntent *mnt;
+
+       fp = setmntent(MOUNTED, "r");
+       if (fp == NULL)
+               return 0;
+
+       while ((mnt = getmntent(fp)) != NULL) {
+               if ((strcmp(mnt->mnt_fsname, spec1) == 0 ||
+                    strcmp(mnt->mnt_fsname, spec2) == 0) &&
+                   (mtpt == NULL || strcmp(mnt->mnt_dir, mtpt) == 0) &&
+                   (type == NULL || strcmp(mnt->mnt_type, type) == 0)) {
+                       endmntent(fp);
+                       return(EEXIST);
+               }
+       }
+       endmntent(fp);
+
+       return 0;
+}
+
+int update_mtab_entry(char *spec, char *mtpt, char *type, char *opts,
+               int flags, int freq, int pass)
+{
+       FILE *fp;
+       struct mntent mnt;
+       int rc = 0;
+
+       mnt.mnt_fsname = spec;
+       mnt.mnt_dir = mtpt;
+       mnt.mnt_type = type;
+       mnt.mnt_opts = opts ? opts : "";
+       mnt.mnt_freq = freq;
+       mnt.mnt_passno = pass;
+
+       fp = setmntent(MOUNTED, "a+");
+       if (fp == NULL) {
+               fprintf(stderr, "%s: setmntent(%s): %s:",
+                       progname, MOUNTED, strerror (errno));
+               rc = 16;
+       } else {
+               if ((addmntent(fp, &mnt)) == 1) {
+                       fprintf(stderr, "%s: addmntent: %s:",
+                               progname, strerror (errno));
+                       rc = 16;
+               }
+               endmntent(fp);
+       }
+
+       return rc;
+}
+
+/* Search for opt in mntlist, returning true if found.
+ */
 static int in_mntlist(char *opt, char *mntlist)
 {
        char *ml, *mlp, *item, *ctx = NULL;