[Libguestfs] [PATCH 2/3] New API: part-get-name (RHBZ#593511).

Counterpart of part-set-name, it uses sgdisk (hence needs the "gdisk" feature) to query for the label/name of a partition in a GPT layout. --- daemon/parted.c | 33 +++++++++++++++++++++++++++++++++ generator/actions.ml | 13 +++++++++++++ src/MAX_PROC_NR | 2 +- 3 files changed, 47 insertions(+), 1 deletion(-) diff --git a/daemon/parted.c b/daemon/parted.c index 5282adb..83f2411 100644 --- a/daemon/parted.c +++ b/daemon/parted.c @@ -886,9 +886,42 @@ extract_uuid (const char *value) return ret; } +static char * +extract_optionally_quoted (const char *value) +{ + size_t value_len = strlen (value); + + if (value_len >= 2 && + ((value[0] == '\'' && value[value_len - 1] == '\'') || + (value[0] == '"' && value[value_len - 1] == '"'))) { + value_len -= 2; + ++value; + } + + char *ret = strndup (value, value_len); + if (ret == NULL) { + reply_with_perror ("strndup"); + return NULL; + } + + return ret; +} + char * do_part_get_gpt_type (const char *device, int partnum) { return sgdisk_info_extract_field (device, partnum, "Partition GUID code", extract_uuid); } + +char * +do_part_get_name (const char *device, int partnum) +{ + char *parttype = do_part_get_parttype (device); + if (STREQ (parttype, "gpt")) + return sgdisk_info_extract_field (device, partnum, + "Partition name", extract_optionally_quoted); + + reply_with_error ("cannot get the partition name from '%s' layouts", parttype); + return NULL; +} diff --git a/generator/actions.ml b/generator/actions.ml index 176de98..b665149 100644 --- a/generator/actions.ml +++ b/generator/actions.ml @@ -11766,6 +11766,19 @@ enables all the other flags, if they are not specified already. =back" }; + { defaults with + name = "part_get_name"; + style = RString "name", [Device "device"; Int "partnum"], []; + proc_nr = Some 416; + optional = Some "gdisk"; + shortdesc = "get partition name"; + longdesc = "\ +This gets the partition name on partition numbered C<partnum> on +device C<device>. Note that partitions are numbered from 1. + +The partition name can only be read on certain types of partition +table. This works on C<gpt> but not on C<mbr> partitions." }; + ] (* Non-API meta-commands available only in guestfish. diff --git a/src/MAX_PROC_NR b/src/MAX_PROC_NR index 21c8d99..1c105f1 100644 --- a/src/MAX_PROC_NR +++ b/src/MAX_PROC_NR @@ -1 +1 @@ -415 +416 -- 1.8.3.1