LU-4334 utils: Only set a single property for nodes

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

diff --git a/lustre/utils/mount_utils.c b/lustre/utils/mount_utils.c
index 83a571f..f7a62ed 100644 (file)
--- a/lustre/utils/mount_utils.c
+++ b/lustre/utils/mount_utils.c
@@ -144,6 +144,43 @@ int get_param(char *buf, char *key, char **val)
        return ENOENT;
 }
 
+int append_param(char *buf, char *key, char *val, char sep)
+{
+       int key_len, i, offset, old_val_len;
+       char *ptr = NULL, str[1024];
+
+       if (key)
+               ptr = strstr(buf, key);
+
+       /* key doesn't exist yet, so just add it */
+       if (ptr == NULL)
+               return add_param(buf, key, val);
+
+       key_len = strlen(key);
+
+       /* Copy previous values to str */
+       for (i = 0; i < sizeof(str); ++i) {
+               if ((ptr[i+key_len] == ' ') || (ptr[i+key_len] == '\0'))
+                       break;
+               str[i] = ptr[i+key_len];
+       }
+       if (i == sizeof(str))
+               return E2BIG;
+       old_val_len = i;
+
+       offset = old_val_len+key_len;
+
+       /* Move rest of buf to overwrite previous key and value */
+       for (i = 0; ptr[i+offset] != '\0'; ++i)
+               ptr[i] = ptr[i+offset];
+
+       ptr[i] = '\0';
+
+       snprintf(str+old_val_len, sizeof(str)-old_val_len, "%c%s", sep, val);
+
+       return add_param(buf, key, str);
+}
+
 char *strscat(char *dst, char *src, int buflen)
 {
        dst[buflen - 1] = 0;