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[tracker/libtracker-common-cleanup] libtracker-common: There is no longer an os-depedent module/API

commit 0c747da27ea4257ee91cc27995caf1782b2110bf
Author: Martyn Russell <martyn lanedo com>
Date:   Mon Oct 13 11:38:14 2014 +0100

    libtracker-common: There is no longer an os-depedent module/API
    
    This means:
    
    - all tracker_spawn*() API is removed, now using g_spawn*()
    - the mplayer extractor has been removed (no one uses it anyway)
    - the setrlimits() API has also been removed (only tracker-extract uses it)
    - many includes have been cleaned up (this is a really old header)
    - strnlen() definitions (for OS' without this API) are defined locally (only 2
      cases).

 configure.ac                                       |    9 +-
 src/libtracker-common/Makefile.am                  |    8 -
 src/libtracker-common/tracker-common.h             |    1 -
 src/libtracker-common/tracker-file-utils.c         |    2 +-
 src/libtracker-common/tracker-os-dependant-unix.c  |  360 --------------------
 src/libtracker-common/tracker-os-dependant-win.c   |  182 ----------
 src/libtracker-common/tracker-os-dependant.h       |   59 ----
 src/libtracker-data/tracker-data-backup.c          |  110 ++++---
 src/libtracker-data/tracker-db-journal.c           |   11 +
 src/tracker-control/tracker-control-general.c      |    2 +-
 src/tracker-extract/93-mplayer-generic.rule        |    4 -
 src/tracker-extract/Makefile.am                    |   18 +-
 src/tracker-extract/tracker-extract-mp3.c          |   11 +
 src/tracker-extract/tracker-extract-mplayer.c      |  302 ----------------
 src/tracker-extract/tracker-extract-msoffice-xml.c |    3 -
 src/tracker-extract/tracker-extract-msoffice.c     |    6 +-
 src/tracker-extract/tracker-extract-oasis.c        |    4 +-
 src/tracker-extract/tracker-extract-ps.c           |   45 +++-
 tests/libtracker-data/tracker-backup-test.c        |    2 +-
 tests/libtracker-data/tracker-sparql-test.c        |    2 +-
 20 files changed, 144 insertions(+), 997 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c80454e..61fa1c4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1798,7 +1798,7 @@ fi
 AM_CONDITIONAL(HAVE_XSLTPROC, test -n "$XSLTPROC")
 
 ####################################################################
-# Check for tracker-extract: gstreamer/mplayer/etc
+# Check for tracker-extract: gstreamer/etc
 ####################################################################
 
 AC_ARG_ENABLE(generic-media-extractor,
@@ -1874,17 +1874,10 @@ if test "$have_generic_media_handler_app" = "GStreamer"; then
    AC_DEFINE(HAVE_GSTREAMER, [], [Define if we have GStreamer])
    AM_CONDITIONAL(HAVE_GSTREAMER, true)
    AM_CONDITIONAL(HAVE_LIBAV, false)
-   AM_CONDITIONAL(USING_EXTERNAL_GENERIC_MEDIA_PLAYER, false)
 elif test "$have_generic_media_handler_app" = "libav"; then
     AC_DEFINE(HAVE_GSTREAMER, [], [Define if we have libav])
     AM_CONDITIONAL(HAVE_LIBAV, true)
     AM_CONDITIONAL(HAVE_GSTREAMER, false)
-    AM_CONDITIONAL(USING_EXTERNAL_GENERIC_MEDIA_PLAYER, false)
-else
-   AC_DEFINE(USING_EXTERNAL_GENERIC_MEDIA_PLAYER, [], [Define that Tracker will try to use external generic 
media players])
-   AM_CONDITIONAL(USING_EXTERNAL_GENERIC_MEDIA_PLAYER, true)
-   AM_CONDITIONAL(HAVE_GSTREAMER, false)
-   AM_CONDITIONAL(HAVE_LIBAV, false)
 fi
 
 ###########################################################################
diff --git a/src/libtracker-common/Makefile.am b/src/libtracker-common/Makefile.am
index a7a4c0c..88513be 100644
--- a/src/libtracker-common/Makefile.am
+++ b/src/libtracker-common/Makefile.am
@@ -9,15 +9,8 @@ AM_CPPFLAGS = \
 libtracker_commondir = $(libdir)/tracker-$(TRACKER_API_VERSION)
 libtracker_common_LTLIBRARIES = libtracker-common.la
 
-if OS_WIN32
-os_sources = tracker-os-dependant-win.c
-else
-os_sources = tracker-os-dependant-unix.c
-endif
-
 libtracker_common_la_SOURCES = \
        $(BUILT_SOURCES) \
-       $(os_sources) \
        tracker-date-time.c \
        tracker-dbus.c \
        tracker-file-utils.c \
@@ -34,7 +27,6 @@ noinst_HEADERS = \
        tracker-enums.h \
        tracker-ioprio.h \
        tracker-log.h \
-       tracker-os-dependant.h \
        tracker-common.h \
        tracker-date-time.h \
        tracker-file-utils.h \
diff --git a/src/libtracker-common/tracker-common.h b/src/libtracker-common/tracker-common.h
index a376d41..ebceba4 100644
--- a/src/libtracker-common/tracker-common.h
+++ b/src/libtracker-common/tracker-common.h
@@ -34,7 +34,6 @@
 #include "tracker-ioprio.h"
 #include "tracker-language.h"
 #include "tracker-log.h"
-#include "tracker-os-dependant.h"
 #include "tracker-sched.h"
 #include "tracker-storage.h"
 #include "tracker-type-utils.h"
diff --git a/src/libtracker-common/tracker-file-utils.c b/src/libtracker-common/tracker-file-utils.c
index c4ad77e..22322d9 100644
--- a/src/libtracker-common/tracker-file-utils.c
+++ b/src/libtracker-common/tracker-file-utils.c
@@ -35,10 +35,10 @@
 #endif
 
 #include <glib.h>
+#include <glib/gstdio.h>
 #include <gio/gio.h>
 
 #include "tracker-log.h"
-#include "tracker-os-dependant.h"
 #include "tracker-file-utils.h"
 #include "tracker-type-utils.h"
 
diff --git a/src/libtracker-data/tracker-data-backup.c b/src/libtracker-data/tracker-data-backup.c
index 91e240e..1d6d4b9 100644
--- a/src/libtracker-data/tracker-data-backup.c
+++ b/src/libtracker-data/tracker-data-backup.c
@@ -24,8 +24,7 @@
 
 #include <glib.h>
 #include <glib/gstdio.h>
-
-#include <libtracker-common/tracker-os-dependant.h>
+#include <glib/gi18n.h>
 
 #include "tracker-data-backup.h"
 #include "tracker-data-manager.h"
@@ -413,22 +412,24 @@ restore_from_temp (void)
 }
 
 void
-tracker_data_backup_save (GFile *destination,
-                          TrackerDataBackupFinished callback,
-                          gpointer user_data,
-                          GDestroyNotify destroy)
+tracker_data_backup_save (GFile                     *destination,
+                          TrackerDataBackupFinished  callback,
+                          gpointer                   user_data,
+                          GDestroyNotify             destroy)
 {
 #ifndef DISABLE_JOURNAL
        BackupSaveInfo *info;
        ProcessContext *context;
        gchar **argv;
        gchar *path, *directory;
+       GError *local_error = NULL;
        GDir *journal_dir;
        GFile *parent;
-       GIOChannel *stdin_channel, *stdout_channel, *stderr_channel;
        GPid pid;
        GPtrArray *files;
        const gchar *f_name;
+       gboolean result;
+       gint stdin_fd, stdout_fd, stderr_fd;
        guint i;
 
        info = g_new0 (BackupSaveInfo, 1);
@@ -477,19 +478,35 @@ tracker_data_backup_save (GFile *destination,
        /* It's fine to untar this asynchronous: the journal replay code can or
         * should cope with unfinished entries at the end of the file, while
         * restoring a backup made this way. */
-
-       if (!tracker_spawn_async_with_channels ((const gchar **) argv,
-                                               0, &pid,
-                                               &stdin_channel,
-                                               &stdout_channel,
-                                               &stderr_channel)) {
+       result = g_spawn_async_with_pipes (NULL, /* working dir */
+                                          (gchar **) argv,
+                                          NULL, /* env */
+                                          G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD,
+                                          NULL, /* func to call before exec() */
+                                          0,
+                                          &pid,
+                                          &stdin_fd,
+                                          &stdout_fd,
+                                          &stderr_fd,
+                                          &local_error);
+
+       if (!result || local_error) {
                GError *error = NULL;
-               g_set_error (&error, TRACKER_DATA_BACKUP_ERROR,
+
+               g_set_error (&error,
+                            TRACKER_DATA_BACKUP_ERROR,
                             TRACKER_DATA_BACKUP_ERROR_UNKNOWN,
-                            "Error starting tar program");
+                            "%s, %s",
+                            _("Error starting 'tar' program"),
+                            local_error ? local_error->message : _("No error given"));
+
+               g_warning ("%s", error->message);
+
                on_journal_copied (info, error);
+
                g_strfreev (argv);
-               g_error_free (error);
+               g_clear_error (&local_error);
+
                return;
        }
 
@@ -497,14 +514,14 @@ tracker_data_backup_save (GFile *destination,
        context->lines = NULL;
        context->data = info;
        context->pid = pid;
-       context->stdin_channel = stdin_channel;
-       context->stdout_channel = stdout_channel;
-       context->stderr_channel = stderr_channel;
-       context->stdout_watch_id = g_io_add_watch (stdout_channel,
+       context->stdin_channel = g_io_channel_unix_new (stdin_fd);
+       context->stdout_channel = g_io_channel_unix_new (stdout_fd);
+       context->stderr_channel = g_io_channel_unix_new (stderr_fd);
+       context->stdout_watch_id = g_io_add_watch (context->stdout_channel,
                                                   G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP,
                                                   read_line_of_tar_output,
                                                   context);
-       context->stderr_watch_id = g_io_add_watch (stderr_channel,
+       context->stderr_watch_id = g_io_add_watch (context->stderr_channel,
                                                   G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP,
                                                   read_error_of_tar_output,
                                                   context);
@@ -560,6 +577,7 @@ tracker_data_backup_restore (GFile                *journal,
                gchar *tmp_stdout = NULL;
                gchar *tmp_stderr = NULL;
                gchar **argv;
+               gboolean result;
                gint exit_status;
 #endif /* DISABLE_JOURNAL */
 
@@ -581,26 +599,40 @@ tracker_data_backup_restore (GFile                *journal,
                g_object_unref (parent);
 
                /* Synchronous: we don't want the mainloop to run while copying the
-                * journal, as nobody should be writing anything at this point */
-
-               if (!tracker_spawn (argv, 0, &tmp_stdout, &tmp_stderr, &exit_status)) {
-                       g_set_error (&info->error, TRACKER_DATA_BACKUP_ERROR,
+                * journal, as nobody should be writing anything at this point
+                */
+               result = g_spawn_sync (NULL, /* working dir */
+                                      argv,
+                                      NULL, /* env */
+                                      G_SPAWN_SEARCH_PATH,
+                                      NULL,
+                                      0,    /* timeout */
+                                      &tmp_stdout,
+                                      &tmp_stderr,
+                                      &exit_status,
+                                      &n_error);
+
+               if (!result || n_error) {
+                       g_set_error (&info->error,
+                                    TRACKER_DATA_BACKUP_ERROR,
                                     TRACKER_DATA_BACKUP_ERROR_UNKNOWN,
-                                    "Error starting tar program");
-               }
-
-               if (!info->error && tmp_stderr) {
-                       if (strlen (tmp_stderr) > 0) {
-                               g_set_error (&info->error, TRACKER_DATA_BACKUP_ERROR,
-                                            TRACKER_DATA_BACKUP_ERROR_UNKNOWN,
-                                            "%s", tmp_stderr);
-                       }
-               }
-
-               if (!info->error && exit_status != 0) {
-                       g_set_error (&info->error, TRACKER_DATA_BACKUP_ERROR,
+                                    "%s, %s",
+                                    _("Error starting 'tar' program"),
+                                    n_error ? n_error->message : _("No error given"));
+                       g_warning ("%s", info->error->message);
+                       g_clear_error (&n_error);
+               } else if (tmp_stderr && strlen (tmp_stderr) > 0) {
+                       g_set_error (&info->error,
+                                    TRACKER_DATA_BACKUP_ERROR,
+                                    TRACKER_DATA_BACKUP_ERROR_UNKNOWN,
+                                    "%s",
+                                    tmp_stderr);
+               } else if (exit_status != 0) {
+                       g_set_error (&info->error,
+                                    TRACKER_DATA_BACKUP_ERROR,
                                     TRACKER_DATA_BACKUP_ERROR_UNKNOWN,
-                                    "Unknown error, tar exited with exit status %d", exit_status);
+                                    _("Unknown error, 'tar' exited with status %d"),
+                                    exit_status);
                }
 
                g_free (tmp_stderr);
diff --git a/src/libtracker-data/tracker-db-journal.c b/src/libtracker-data/tracker-db-journal.c
index 1f26ae0..c397c4f 100644
--- a/src/libtracker-data/tracker-db-journal.c
+++ b/src/libtracker-data/tracker-db-journal.c
@@ -119,6 +119,17 @@ static TransactionFormat current_transaction_format;
 
 static gboolean tracker_db_journal_rotate (GError **error);
 
+#ifndef HAVE_STRNLEN
+
+size_t
+strnlen (const char *str, size_t max)
+{
+       const char *end = memchr (str, 0, max);
+       return end ? (size_t)(end - str) : max;
+}
+
+#endif /* HAVE_STRNLEN */
+
 static gboolean
 journal_eof (JournalReader *jreader)
 {
diff --git a/src/tracker-control/tracker-control-general.c b/src/tracker-control/tracker-control-general.c
index fc6aa91..b69b4c6 100644
--- a/src/tracker-control/tracker-control-general.c
+++ b/src/tracker-control/tracker-control-general.c
@@ -21,7 +21,7 @@
 
 #include <errno.h>
 
-#include <glib.h>
+#include <glib/gstdio.h>
 #include <glib/gi18n.h>
 
 #ifdef __sun
diff --git a/src/tracker-extract/Makefile.am b/src/tracker-extract/Makefile.am
index ced5ef0..a04a9c0 100644
--- a/src/tracker-extract/Makefile.am
+++ b/src/tracker-extract/Makefile.am
@@ -52,8 +52,7 @@ rules_files = \
        90-text-generic.rule \
        90-libav-audio-generic.rule \
        90-libav-video-generic.rule \
-       91-gstreamer-generic-dlna.rule \
-       93-mplayer-generic.rule
+       91-gstreamer-generic-dlna.rule
 
 # NOTE:
 # We don't always link with libtracker-common, we only link
@@ -129,11 +128,6 @@ if HAVE_GUPNP_DLNA
 rules_DATA += 91-gstreamer-generic-dlna.rule
 endif
 
-if USING_EXTERNAL_GENERIC_MEDIA_PLAYER
-extractmodules_LTLIBRARIES +=  libextract-mplayer.la
-rules_DATA += 93-mplayer-generic.rule
-endif
-
 if HAVE_TOTEM_PL_PARSER
 extractmodules_LTLIBRARIES += libextract-playlist.la
 rules_DATA += 15-playlist.rule
@@ -234,16 +228,6 @@ libextract_flac_la_LIBADD = \
        $(TRACKER_EXTRACT_MODULES_LIBS) \
        $(LIBFLAC_LIBS)
 
-# MPlayer
-libextract_mplayer_la_SOURCES = tracker-extract-mplayer.c
-libextract_mplayer_la_CFLAGS = $(TRACKER_EXTRACT_MODULES_CFLAGS)
-libextract_mplayer_la_LDFLAGS = $(module_flags)
-libextract_mplayer_la_LIBADD = \
-       $(top_builddir)/src/libtracker-extract/libtracker-extract.la \
-       $(top_builddir)/src/libtracker-common/libtracker-common.la \
-       $(BUILD_LIBS) \
-       $(TRACKER_EXTRACT_MODULES_LIBS)
-
 # Oasis
 libextract_oasis_la_SOURCES = tracker-extract-oasis.c
 libextract_oasis_la_CFLAGS = \
diff --git a/src/tracker-extract/tracker-extract-mp3.c b/src/tracker-extract/tracker-extract-mp3.c
index 290d210..f2ef306 100644
--- a/src/tracker-extract/tracker-extract-mp3.c
+++ b/src/tracker-extract/tracker-extract-mp3.c
@@ -435,6 +435,17 @@ static gint spf_table[6] = {
        48, 144, 144, 48, 144,  72
 };
 
+#ifndef HAVE_STRNLEN
+
+size_t
+strnlen (const char *str, size_t max)
+{
+       const char *end = memchr (str, 0, max);
+       return end ? (size_t)(end - str) : max;
+}
+
+#endif /* HAVE_STRNLEN */
+
 static void
 id3tag_free (id3tag *tags)
 {
diff --git a/src/tracker-extract/tracker-extract-msoffice-xml.c 
b/src/tracker-extract/tracker-extract-msoffice-xml.c
index f9892f9..71155be 100644
--- a/src/tracker-extract/tracker-extract-msoffice-xml.c
+++ b/src/tracker-extract/tracker-extract-msoffice-xml.c
@@ -32,9 +32,6 @@
 #include <gsf/gsf-utils.h>
 #include <gsf/gsf-infile-zip.h>
 
-#include <libtracker-common/tracker-utils.h>
-#include <libtracker-common/tracker-os-dependant.h>
-
 #include <libtracker-extract/tracker-extract.h>
 
 #include "tracker-main.h"
diff --git a/src/tracker-extract/tracker-extract-msoffice.c b/src/tracker-extract/tracker-extract-msoffice.c
index da183ef..83693de 100644
--- a/src/tracker-extract/tracker-extract-msoffice.c
+++ b/src/tracker-extract/tracker-extract-msoffice.c
@@ -25,7 +25,6 @@
 #include <string.h>
 
 #include <glib.h>
-
 #include <gsf/gsf.h>
 #include <gsf/gsf-doc-meta-data.h>
 #include <gsf/gsf-infile.h>
@@ -35,10 +34,7 @@
 #include <gsf/gsf-utils.h>
 #include <gsf/gsf-infile-zip.h>
 
-#include <libtracker-common/tracker-utils.h>
-#include <libtracker-common/tracker-file-utils.h>
-#include <libtracker-common/tracker-os-dependant.h>
-
+#include <libtracker-common/tracker-common.h>
 #include <libtracker-extract/tracker-extract.h>
 
 #include "tracker-main.h"
diff --git a/src/tracker-extract/tracker-extract-oasis.c b/src/tracker-extract/tracker-extract-oasis.c
index 658b140..a580b72 100644
--- a/src/tracker-extract/tracker-extract-oasis.c
+++ b/src/tracker-extract/tracker-extract-oasis.c
@@ -18,7 +18,9 @@
  * Boston, MA  02110-1301, USA.
  */
 
-#include <libtracker-common/tracker-os-dependant.h>
+#include "config.h"
+
+#include <libtracker-common/tracker-common.h>
 
 #include <libtracker-extract/tracker-extract.h>
 
diff --git a/src/tracker-extract/tracker-extract-ps.c b/src/tracker-extract/tracker-extract-ps.c
index 6556a2e..f9580e9 100644
--- a/src/tracker-extract/tracker-extract-ps.c
+++ b/src/tracker-extract/tracker-extract-ps.c
@@ -29,9 +29,7 @@
 #include <glib.h>
 #include <glib/gstdio.h>
 
-#include <libtracker-common/tracker-os-dependant.h>
-#include <libtracker-common/tracker-file-utils.h>
-
+#include <libtracker-common/tracker-common.h>
 #include <libtracker-extract/tracker-extract.h>
 
 static gchar *
@@ -217,6 +215,45 @@ extract_ps (const gchar          *uri,
 
 #ifdef USING_UNZIPPSFILES
 
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+static void
+spawn_child_func (gpointer user_data)
+{
+       struct rlimit cpu_limit;
+       gint timeout = GPOINTER_TO_INT (user_data);
+
+       if (timeout > 0) {
+               /* set cpu limit */
+               getrlimit (RLIMIT_CPU, &cpu_limit);
+               cpu_limit.rlim_cur = timeout;
+               cpu_limit.rlim_max = timeout + 1;
+
+               if (setrlimit (RLIMIT_CPU, &cpu_limit) != 0) {
+                       g_critical ("Failed to set resource limit for CPU");
+               }
+
+               /* Have this as a precaution in cases where cpu limit has not
+                * been reached due to spawned app sleeping.
+                */
+               alarm (timeout + 2);
+       }
+
+       /* Set child's niceness to 19 */
+       errno = 0;
+
+       /* nice() uses attribute "warn_unused_result" and so complains
+        * if we do not check its returned value. But it seems that
+        * since glibc 2.2.4, nice() can return -1 on a successful call
+        * so we have to check value of errno too. Stupid...
+        */
+       if (nice (19) == -1 && errno) {
+               g_warning ("Failed to set nice value");
+       }
+}
+
 static void
 extract_ps_gz (const gchar          *uri,
                TrackerSparqlBuilder *preupdate,
@@ -242,7 +279,7 @@ extract_ps_gz (const gchar          *uri,
                                       (gchar **) argv,
                                       NULL,
                                       G_SPAWN_SEARCH_PATH | G_SPAWN_STDERR_TO_DEV_NULL,
-                                      tracker_spawn_child_func,
+                                      spawn_child_func,
                                       GINT_TO_POINTER (10),
                                       NULL,
                                       NULL,
diff --git a/tests/libtracker-data/tracker-backup-test.c b/tests/libtracker-data/tracker-backup-test.c
index d9788a5..91645bd 100644
--- a/tests/libtracker-data/tracker-backup-test.c
+++ b/tests/libtracker-data/tracker-backup-test.c
@@ -22,7 +22,7 @@
 #include <string.h>
 #include <locale.h>
 
-#include <glib.h>
+#include <glib/gstdio.h>
 #include <gio/gio.h>
 
 #include <libtracker-common/tracker-common.h>
diff --git a/tests/libtracker-data/tracker-sparql-test.c b/tests/libtracker-data/tracker-sparql-test.c
index 4ecec72..8d045ce 100644
--- a/tests/libtracker-data/tracker-sparql-test.c
+++ b/tests/libtracker-data/tracker-sparql-test.c
@@ -22,7 +22,7 @@
 #include <string.h>
 #include <locale.h>
 
-#include <glib.h>
+#include <glib/gstdio.h>
 #include <gio/gio.h>
 
 #include <libtracker-common/tracker-common.h>
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