diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/core/settings.c | 32 | ||||
| -rw-r--r-- | src/include/gpxe/settings.h | 3 |
2 files changed, 35 insertions, 0 deletions
diff --git a/src/core/settings.c b/src/core/settings.c index 2d9c096e0..09033bd91 100644 --- a/src/core/settings.c +++ b/src/core/settings.c @@ -390,6 +390,38 @@ int fetch_string_setting ( struct settings *settings, struct setting *setting, } /** + * Fetch value of string setting + * + * @v settings Settings block, or NULL to search all blocks + * @v setting Setting to fetch + * @v data Buffer to allocate and fill with setting string data + * @ret len Length of string setting, or negative error + * + * The resulting string is guaranteed to be correctly NUL-terminated. + * The returned length will be the length of the underlying setting + * data. The caller is responsible for eventually freeing the + * allocated buffer. + */ +int fetch_string_setting_copy ( struct settings *settings, + struct setting *setting, + char **data ) { + int len; + int check_len; + + len = fetch_setting_len ( settings, setting ); + if ( len < 0 ) + return len; + + *data = malloc ( len + 1 ); + if ( ! *data ) + return -ENOMEM; + + fetch_string_setting ( settings, setting, *data, ( len + 1 ) ); + assert ( check_len == len ); + return len; +} + +/** * Fetch value of IPv4 address setting * * @v settings Settings block, or NULL to search all blocks diff --git a/src/include/gpxe/settings.h b/src/include/gpxe/settings.h index 37c01b058..e9f0bce59 100644 --- a/src/include/gpxe/settings.h +++ b/src/include/gpxe/settings.h @@ -175,6 +175,9 @@ extern int fetch_setting_len ( struct settings *settings, extern int fetch_string_setting ( struct settings *settings, struct setting *setting, char *data, size_t len ); +extern int fetch_string_setting_copy ( struct settings *settings, + struct setting *setting, + char **data ); extern int fetch_ipv4_setting ( struct settings *settings, struct setting *setting, struct in_addr *inp ); extern int fetch_int_setting ( struct settings *settings, |