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authorDave Young <dyoung@redhat.com>2014-08-14 17:15:27 +0800
committerMatt Fleming <matt.fleming@intel.com>2014-10-03 18:40:58 +0100
commit6ccc72b87b83ece31c2a75bbe07f440b0378f7a9 (patch)
tree777aaf2d1e492963dc65bff61c236edb31532650 /lib/cmdline.c
parentb2e0a54a1296a91b800f316df7bef7d1905e4fd0 (diff)
downloadlwn-6ccc72b87b83ece31c2a75bbe07f440b0378f7a9.tar.gz
lwn-6ccc72b87b83ece31c2a75bbe07f440b0378f7a9.zip
lib: Add a generic cmdline parse function parse_option_str
There should be a generic function to parse params like a=b,c Adding parse_option_str in lib/cmdline.c which will return true if there's specified option set in the params. Also updated efi=old_map parsing code to use the new function Signed-off-by: Dave Young <dyoung@redhat.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'lib/cmdline.c')
-rw-r--r--lib/cmdline.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/cmdline.c b/lib/cmdline.c
index 76a712e6e20e..8f13cf73c2ec 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -160,3 +160,32 @@ unsigned long long memparse(const char *ptr, char **retptr)
return ret;
}
EXPORT_SYMBOL(memparse);
+
+/**
+ * parse_option_str - Parse a string and check an option is set or not
+ * @str: String to be parsed
+ * @option: option name
+ *
+ * This function parses a string containing a comma-separated list of
+ * strings like a=b,c.
+ *
+ * Return true if there's such option in the string, or return false.
+ */
+bool parse_option_str(const char *str, const char *option)
+{
+ while (*str) {
+ if (!strncmp(str, option, strlen(option))) {
+ str += strlen(option);
+ if (!*str || *str == ',')
+ return true;
+ }
+
+ while (*str && *str != ',')
+ str++;
+
+ if (*str == ',')
+ str++;
+ }
+
+ return false;
+}