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https://gitlab.gnome.org/GNOME/glib.git
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Merge branch 'wip/lantw/use-uname-as-a-fallback-to-get-os-info' into 'master'
Use uname as a fallback to get OS info See merge request GNOME/glib!1165
This commit is contained in:
Philip Withnall
commit
3dec72b946
186
glib/gutils.c
186
glib/gutils.c
@ -42,6 +42,7 @@
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#include <sys/stat.h>
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#ifdef G_OS_UNIX
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#include <pwd.h>
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#include <sys/utsname.h>
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#include <unistd.h>
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#endif
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#include <sys/types.h>
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@ -1350,6 +1351,137 @@ get_windows_version (gboolean with_windows)
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}
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#endif
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#ifdef G_OS_UNIX
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static gchar *
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get_os_info_from_os_release (const gchar *key_name,
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const gchar *buffer)
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{
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GStrv lines;
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gchar *prefix;
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size_t i;
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gchar *result = NULL;
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lines = g_strsplit (buffer, "\n", -1);
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prefix = g_strdup_printf ("%s=", key_name);
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for (i = 0; lines[i] != NULL; i++)
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{
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const gchar *line = lines[i];
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const gchar *value;
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if (g_str_has_prefix (line, prefix))
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{
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value = line + strlen (prefix);
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result = g_shell_unquote (value, NULL);
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if (result == NULL)
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result = g_strdup (value);
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break;
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}
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}
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g_strfreev (lines);
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g_free (prefix);
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#ifdef __linux__
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/* Default values in spec */
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if (result == NULL)
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{
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if (g_str_equal (key_name, G_OS_INFO_KEY_NAME))
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return g_strdup ("Linux");
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if (g_str_equal (key_name, G_OS_INFO_KEY_ID))
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return g_strdup ("linux");
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if (g_str_equal (key_name, G_OS_INFO_KEY_PRETTY_NAME))
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return g_strdup ("Linux");
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}
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#endif
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return g_steal_pointer (&result);
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}
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static gchar *
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get_os_info_from_uname (const gchar *key_name)
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{
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struct utsname info;
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if (uname (&info) == -1)
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return NULL;
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if (strcmp (key_name, G_OS_INFO_KEY_NAME) == 0)
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return g_strdup (info.sysname);
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else if (strcmp (key_name, G_OS_INFO_KEY_VERSION) == 0)
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return g_strdup (info.release);
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else if (strcmp (key_name, G_OS_INFO_KEY_PRETTY_NAME) == 0)
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return g_strdup_printf ("%s %s", info.sysname, info.release);
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else if (strcmp (key_name, G_OS_INFO_KEY_ID) == 0)
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{
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gchar *result = g_ascii_strdown (info.sysname, -1);
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g_strcanon (result, "abcdefghijklmnopqrstuvwxyz0123456789_-.", '_');
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return g_steal_pointer (&result);
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}
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else if (strcmp (key_name, G_OS_INFO_KEY_VERSION_ID) == 0)
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{
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/* We attempt to convert the version string to the format returned by
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* config.guess, which is the script used to generate target triplets
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* in GNU autotools. There are a lot of rules in the script. We only
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* implement a few rules which are easy to understand here.
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*
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* config.guess can be found at https://savannah.gnu.org/projects/config.
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*/
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gchar *result;
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if (strcmp (info.sysname, "NetBSD") == 0)
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{
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/* sed -e 's,[-_].*,,' */
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gssize len = G_MAXSSIZE;
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const gchar *c;
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if ((c = strchr (info.release, '-')) != NULL)
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len = MIN (len, c - info.release);
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if ((c = strchr (info.release, '_')) != NULL)
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len = MIN (len, c - info.release);
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if (len == G_MAXSSIZE)
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len = -1;
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result = g_ascii_strdown (info.release, len);
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}
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else if (strcmp (info.sysname, "GNU") == 0)
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{
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/* sed -e 's,/.*$,,' */
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gssize len = -1;
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const gchar *c = strchr (info.release, '/');
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if (c != NULL)
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len = c - info.release;
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result = g_ascii_strdown (info.release, len);
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}
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else if (g_str_has_prefix (info.sysname, "GNU/") ||
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strcmp (info.sysname, "FreeBSD") == 0 ||
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strcmp (info.sysname, "DragonFly") == 0)
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{
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/* sed -e 's,[-(].*,,' */
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gssize len = G_MAXSSIZE;
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const gchar *c;
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if ((c = strchr (info.release, '-')) != NULL)
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len = MIN (len, c - info.release);
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if ((c = strchr (info.release, '(')) != NULL)
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len = MIN (len, c - info.release);
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if (len == G_MAXSSIZE)
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len = -1;
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result = g_ascii_strdown (info.release, len);
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}
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else
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result = g_ascii_strdown (info.release, -1);
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g_strcanon (result, "abcdefghijklmnopqrstuvwxyz0123456789_-.", '_');
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return g_steal_pointer (&result);
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}
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else
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return NULL;
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}
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#endif
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/**
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* g_get_os_info:
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* @key_name: a key for the OS info being requested, for example %G_OS_INFO_KEY_NAME.
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@ -1373,62 +1505,38 @@ g_get_os_info (const gchar *key_name)
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{
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#if defined (__APPLE__)
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if (g_strcmp0 (key_name, G_OS_INFO_KEY_NAME) == 0)
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return g_strdup (_("macOS"));
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return g_strdup ("macOS");
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else
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return NULL;
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#elif defined (G_OS_UNIX)
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gchar *buffer;
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gchar *prefix;
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GStrv lines;
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int i;
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const gchar * const os_release_files[] = { "/etc/os-release", "/usr/lib/os-release" };
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gsize i;
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gchar *buffer = NULL;
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gchar *result = NULL;
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GError *error = NULL;
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g_return_val_if_fail (key_name != NULL, NULL);
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if (!g_file_get_contents ("/etc/os-release", &buffer, NULL, &error))
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for (i = 0; i < G_N_ELEMENTS (os_release_files); i++)
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{
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GError *error = NULL;
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gboolean file_missing;
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if (g_file_get_contents (os_release_files[i], &buffer, NULL, &error))
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break;
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file_missing = g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT);
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g_clear_error (&error);
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if (!file_missing ||
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!g_file_get_contents ("/usr/lib/os-release", &buffer, NULL, NULL))
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if (!file_missing)
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return NULL;
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}
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lines = g_strsplit (buffer, "\n", -1);
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if (buffer != NULL)
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result = get_os_info_from_os_release (key_name, buffer);
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else
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result = get_os_info_from_uname (key_name);
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g_free (buffer);
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prefix = g_strdup_printf ("%s=", key_name);
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for (i = 0; lines[i] != NULL; i++)
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{
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const gchar *line = lines[i];
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const gchar *value;
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if (g_str_has_prefix (line, prefix))
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{
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value = line + strlen (prefix);
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result = g_shell_unquote (value, NULL);
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if (result == NULL)
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result = g_strdup (value);
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break;
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}
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}
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g_strfreev (lines);
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g_free (prefix);
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/* Default values in spec */
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if (result == NULL)
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{
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if (g_str_equal (key_name, G_OS_INFO_KEY_NAME))
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return g_strdup ("Linux");
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if (g_str_equal (key_name, G_OS_INFO_KEY_ID))
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return g_strdup ("linux");
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if (g_str_equal (key_name, G_OS_INFO_KEY_PRETTY_NAME))
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return g_strdup ("Linux");
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}
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return g_steal_pointer (&result);
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#elif defined (G_OS_WIN32)
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if (g_strcmp0 (key_name, G_OS_INFO_KEY_NAME) == 0)
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@ -29,6 +29,9 @@
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#ifdef G_OS_UNIX
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#include <sys/utsname.h>
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#endif
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#ifdef G_OS_WIN32
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#include <windows.h>
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#endif
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@ -522,6 +525,9 @@ test_os_info (void)
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{
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gchar *name;
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gchar *contents = NULL;
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#ifdef G_OS_UNIX
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struct utsname info;
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#endif
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/* Whether this is implemented or not, it must not crash */
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name = g_get_os_info (G_OS_INFO_KEY_NAME);
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@ -534,7 +540,8 @@ test_os_info (void)
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g_assert_nonnull (name);
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#elif defined (G_OS_UNIX)
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if (g_file_get_contents ("/etc/os-release", &contents, NULL, NULL) ||
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g_file_get_contents ("/usr/lib/os-release", &contents, NULL, NULL))
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g_file_get_contents ("/usr/lib/os-release", &contents, NULL, NULL) ||
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uname (&info) == 0)
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g_assert_nonnull (name);
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else
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g_test_skip ("os-release(5) API not implemented on this platform");
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