From: Michael Tremer <michael.tremer@ipfire.org>
Date: Tue, 6 Apr 2021 15:44:45 +0000 (+0000)
Subject: pakfire: Read /etc/os-release
X-Git-Tag: 0.9.28~1285^2~432
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5c76be2cb56d7a25e2dc28cc981fc5bd818c64c4;p=pakfire.git

pakfire: Read /etc/os-release

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/libpakfire/include/pakfire/util.h b/src/libpakfire/include/pakfire/util.h
index 5974f3800..b02861c09 100644
--- a/src/libpakfire/include/pakfire/util.h
+++ b/src/libpakfire/include/pakfire/util.h
@@ -59,7 +59,10 @@ char* pakfire_generate_uuid();
 
 #include <archive.h>
 
+#define pakfire_string_set(s, value) snprintf(s, sizeof(s), "%s", value)
+
 int pakfire_string_endswith(const char* s, const char* suffix);
+char* pakfire_unquote_in_place(char* s);
 char* pakfire_lstrip(const char* s);
 
 int pakfire_path_exists(const char* path);
diff --git a/src/libpakfire/pakfire.c b/src/libpakfire/pakfire.c
index 3598cb28a..c033b7dcb 100644
--- a/src/libpakfire/pakfire.c
+++ b/src/libpakfire/pakfire.c
@@ -78,6 +78,14 @@ struct _Pakfire {
 
 	STAILQ_HEAD(mountpoints, mountpoint) mountpoints;
 	int destroy_on_free;
+
+	struct pakfire_distro {
+		char pretty_name[256];
+		char name[64];
+		char id[32];
+		char version[32];
+		char version_id[32];
+	} distro;
 };
 
 static const struct pakfire_mountpoint {
@@ -387,6 +395,77 @@ static int pakfire_safety_checks(Pakfire pakfire) {
 	return 0;
 }
 
+static int pakfire_read_os_release(Pakfire pakfire) {
+	int r = 0;
+
+	char* path = pakfire_make_path(pakfire, "/etc/os-release");
+	if (!path)
+		return ENOMEM;
+
+	FILE* f = fopen(path, "r");
+	if (!f) {
+		ERROR(pakfire, "Could not open %s: %s\n", path, strerror(errno));
+		r = -1;
+		goto ERROR;
+	}
+
+	char* line = NULL;
+	size_t l = 0;
+
+	while (1) {
+		ssize_t bytes_read = getline(&line, &l, f);
+		if (bytes_read < 0)
+			break;
+
+		// Remove trailing newline
+		pakfire_remove_trailing_newline(line);
+
+		// Find =
+		char* delim = strchr(line, '=');
+		if (!delim)
+			continue;
+
+		// Replace = by NULL
+		*delim = '\0';
+
+		// Set key and val to the start of the strings
+		char* key = line;
+		char* val = delim + 1;
+
+		// Unquote val
+		val = pakfire_unquote_in_place(val);
+
+		if (strcmp(key, "PRETTY_NAME") == 0)
+			r = pakfire_string_set(pakfire->distro.pretty_name, val);
+		else if (strcmp(key, "NAME") == 0)
+			r = pakfire_string_set(pakfire->distro.name, val);
+		else if (strcmp(key, "ID") == 0)
+			r = pakfire_string_set(pakfire->distro.id, val);
+		else if (strcmp(key, "VERSION") == 0)
+			r = pakfire_string_set(pakfire->distro.version, val);
+		else if (strcmp(key, "VERSION_ID") == 0)
+			r = pakfire_string_set(pakfire->distro.version_id, val);
+		else
+			continue;
+
+		// Catch any errors
+		if (r < 0)
+			goto ERROR;
+	}
+
+	// Success
+	r = 0;
+
+ERROR:
+	if (f)
+		fclose(f);
+	if (line)
+		free(line);
+	free(path);
+
+	return r;
+}
+
 PAKFIRE_EXPORT int pakfire_create(Pakfire* pakfire, const char* path, const char* arch) {
 	char tempdir[PATH_MAX] = PAKFIRE_PRIVATE_DIR "/tmp/XXXXXX";
 	int r = 1;
@@ -446,9 +525,15 @@ PAKFIRE_EXPORT int pakfire_create(Pakfire* pakfire, const char* path, const char
 	if (env)
 		pakfire_log_set_priority(p, log_priority(env));
 
+	// Read /etc/os-release
+	r = pakfire_read_os_release(p);
+	if (r)
+		goto ERROR;
+
 	DEBUG(p, "Pakfire initialized at %p\n", p);
-	DEBUG(p, "  arch = %s\n", pakfire_get_arch(p));
-	DEBUG(p, "  path = %s\n", pakfire_get_path(p));
+	DEBUG(p, "  arch   = %s\n", pakfire_get_arch(p));
+	DEBUG(p, "  path   = %s\n", pakfire_get_path(p));
+	DEBUG(p, "  distro = %s\n", p->distro.pretty_name);
 
 	// Perform some safety checks
 	r = pakfire_safety_checks(p);
diff --git a/src/libpakfire/util.c b/src/libpakfire/util.c
index 18f865d97..84c133a2c 100644
--- a/src/libpakfire/util.c
+++ b/src/libpakfire/util.c
@@ -52,6 +52,30 @@ int pakfire_string_endswith(const char* s, const char* suffix) {
 	return !strcmp(s + strlen(s) - strlen(suffix), suffix);
 }
 
+char* pakfire_unquote_in_place(char* s) {
+	if (!s || !*s)
+		return s;
+
+	// Is the first character a quote?
+	if (*s != '"')
+		return s;
+
+	// Find the end of value
+	size_t l = strlen(s);
+	if (!l)
+		return s;
+
+	// Is the last character a quote?
+	if (s[l - 1] != '"')
+		return s;
+
+	// The string seems to be in quotes; remove them
+	s[l - 1] = '\0';
+	s++;
+
+	return s;
+}
+
 PAKFIRE_EXPORT int pakfire_string_partition(
 		const char* s, const char* delim, char** s1, char** s2) {
 	char* p = strstr(s, delim);