[PATCH][RESEND] lib: Add helper function to get release info
Colin King
colin.king at canonical.com
Tue Mar 5 07:59:23 UTC 2013
From: Colin Ian King <colin.king at canonical.com>
Add fwts_release_get() and fwts_release_free() to help get and free
the current disto release information. fwts_release_get() returns
NULL if it cannot get the distro release information. Currently only
supports debian systems.
Example:
fwts_release *release = fwts_release_get();
if (release) {
printf("Distributor: <%s>\n", release->distributor);
printf("Description: <%s>\n", release->description);
printf("Release: <%s>\n", release->release);
printf("Codename: <%s>\n", release->codename);
fwts_release_free(release);
}
Some fields may be empty strings "" when undefined. For unsupported
distros expect all fields to be empty strings if the release info
cannot be fetched.
Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
src/lib/include/fwts.h | 1 +
src/lib/include/fwts_release.h | 33 +++++++++++
src/lib/src/Makefile.am | 1 +
src/lib/src/fwts_release.c | 123 +++++++++++++++++++++++++++++++++++++++++
4 files changed, 158 insertions(+)
create mode 100644 src/lib/include/fwts_release.h
create mode 100644 src/lib/src/fwts_release.c
diff --git a/src/lib/include/fwts.h b/src/lib/include/fwts.h
index cbf9dd9..680eab9 100644
--- a/src/lib/include/fwts.h
+++ b/src/lib/include/fwts.h
@@ -79,5 +79,6 @@
#include "fwts_button.h"
#include "fwts_json.h"
#include "fwts_ioport.h"
+#include "fwts_release.h"
#endif
diff --git a/src/lib/include/fwts_release.h b/src/lib/include/fwts_release.h
new file mode 100644
index 0000000..9a806c6
--- /dev/null
+++ b/src/lib/include/fwts_release.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2013 Canonical
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef __FWTS_RELEASE_H__
+#define __FWTS_RELEASE_H__
+
+typedef struct {
+ char *distributor;
+ char *description;
+ char *release;
+ char *codename;
+} fwts_release;
+
+fwts_release *fwts_release_get(void);
+void fwts_release_free(fwts_release *release);
+
+#endif
diff --git a/src/lib/src/Makefile.am b/src/lib/src/Makefile.am
index 6a44641..4d9ab38 100644
--- a/src/lib/src/Makefile.am
+++ b/src/lib/src/Makefile.am
@@ -59,6 +59,7 @@ libfwts_la_SOURCES = \
fwts_multiproc.c \
fwts_oops.c \
fwts_pipeio.c \
+ fwts_release.c \
fwts_scan_efi_systab.c \
fwts_set.c \
fwts_smbios.c \
diff --git a/src/lib/src/fwts_release.c b/src/lib/src/fwts_release.c
new file mode 100644
index 0000000..5c06747
--- /dev/null
+++ b/src/lib/src/fwts_release.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2013 Canonical
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+#include <string.h>
+
+#include "fwts.h"
+
+/*
+ * fwts_release_field_get()
+ * attempt to match a field (needle) in the given text and update field
+ * with any text after the delimiter, e.g. if text is "DISTRIB_ID=Ubuntu"
+ * and needle is "DISTRIB_ID" and delimiter is "=", then the field gets set to "Ubuntu".
+ */
+static void fwts_release_field_get(char *needle, char *delimiter, char *text, char **field)
+{
+ char *str = strstr(text, delimiter);
+
+ if (str == NULL)
+ return;
+ if (strstr(text, needle) == NULL)
+ return;
+ str++;
+ while (*str == ' ')
+ str++;
+
+ if (str)
+ *field = strdup(str);
+}
+
+/*
+ * fwts_release_get_debian()
+ * return release for debian based systems
+ */
+void fwts_release_get_debian(fwts_list *list, fwts_release *release)
+{
+ fwts_list_link *item;
+
+ fwts_list_foreach(item, list) {
+ char *line = fwts_text_list_text(item);
+
+ fwts_release_field_get("DISTRIB_ID", "=", line, &release->distributor);
+ fwts_release_field_get("DISTRIB_RELEASE", "=", line, &release->description);
+ fwts_release_field_get("DISTRIB_CODENAME", "=", line, &release->release);
+ fwts_release_field_get("DISTRIB_DESCRIPTION", "=", line, &release->codename);
+ }
+}
+
+/*
+ * fwts_release_field_null
+ * convert NULL fields to ""
+ */
+void fwts_release_field_null_to_str(char **field)
+{
+ if (*field == NULL)
+ *field = strdup("");
+}
+
+/*
+ * fwts_release_get()
+ * get release info
+ */
+fwts_release *fwts_release_get(void)
+{
+ fwts_list *list;
+ fwts_release *release;
+
+ if ((release = calloc(1, sizeof(fwts_release))) == NULL)
+ return NULL;
+
+ /*
+ * For the moment, check in /etc/lsb-release, we need to add in
+ * support for different distros too.
+ */
+ if ((list = fwts_file_open_and_read("/etc/lsb-release")) != NULL) {
+ fwts_release_get_debian(list, release);
+ fwts_list_free(list, free);
+ }
+
+ /* null fields to "" */
+ fwts_release_field_null_to_str(&release->distributor);
+ fwts_release_field_null_to_str(&release->description);
+ fwts_release_field_null_to_str(&release->release);
+ fwts_release_field_null_to_str(&release->codename);
+
+ if ((release->distributor == NULL) ||
+ (release->description == NULL) ||
+ (release->release == NULL) ||
+ (release->codename == NULL)) {
+ fwts_release_free(release);
+ return NULL;
+ }
+ return release;
+}
+
+/*
+ * fwts_release_free()
+ * free release info
+ */
+void fwts_release_free(fwts_release *release)
+{
+ if (release) {
+ free(release->distributor);
+ free(release->description);
+ free(release->release);
+ free(release->codename);
+ free(release);
+ }
+}
--
1.8.1.2
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