copytrace: create empty stream classes by default

[babeltrace.git] / common / common.c

diff --git a/common/common.c b/common/common.c
index 032a1e06294b65aeed59a34f4276fdd543603808..0a0d15836e329d866c40286ded145f209d671b2e 100644 (file)
--- a/common/common.c
+++ b/common/common.c
@@ -22,16 +22,24 @@
  * SOFTWARE.
  */
 
+#define BT_LOG_TAG "COMMON"
+#include "logging.h"
+
 #include <unistd.h>
 #include <string.h>
 #include <sys/types.h>
-#include <pwd.h>
 #include <unistd.h>
 #include <assert.h>
 #include <ctype.h>
 #include <glib.h>
+#include <stdlib.h>
 #include <babeltrace/babeltrace-internal.h>
 #include <babeltrace/common-internal.h>
+#include <babeltrace/compat/unistd-internal.h>
+
+#ifndef __MINGW32__
+#include <pwd.h>
+#endif
 
 #define SYSTEM_PLUGIN_PATH     INSTALL_LIBDIR "/babeltrace/plugins"
 #define HOME_ENV_VAR           "HOME"
@@ -87,23 +95,40 @@ const char *bt_common_get_system_plugin_path(void)
        return SYSTEM_PLUGIN_PATH;
 }
 
+#ifdef __MINGW32__
+BT_HIDDEN
+bool bt_common_is_setuid_setgid(void)
+{
+       return false;
+}
+#else /* __MINGW32__ */
 BT_HIDDEN
 bool bt_common_is_setuid_setgid(void)
 {
        return (geteuid() != getuid() || getegid() != getgid());
 }
+#endif /* __MINGW32__ */
 
-static char *bt_secure_getenv(const char *name)
+static
+char *bt_secure_getenv(const char *name)
 {
        if (bt_common_is_setuid_setgid()) {
-               printf_error("Disregarding %s environment variable for setuid/setgid binary",
-                       name);
+               BT_LOGD("Disregarding environment variable for setuid/setgid binary: "
+                       "name=\"%s\"", name);
                return NULL;
        }
        return getenv(name);
 }
 
-static const char *get_home_dir(void)
+#ifdef __MINGW32__
+static
+const char *bt_get_home_dir(void)
+{
+       return g_get_home_dir();
+}
+#else /* __MINGW32__ */
+static
+const char *bt_get_home_dir(void)
 {
        char *val = NULL;
        struct passwd *pwd;
@@ -121,21 +146,25 @@ static const char *get_home_dir(void)
 end:
        return val;
 }
+#endif /* __MINGW32__ */
 
 BT_HIDDEN
 char *bt_common_get_home_plugin_path(void)
 {
        char *path = NULL;
        const char *home_dir;
+       size_t length;
 
-       home_dir = get_home_dir();
+       home_dir = bt_get_home_dir();
        if (!home_dir) {
                goto end;
        }
 
-       if (strlen(home_dir) + strlen(HOME_PLUGIN_SUBPATH) + 1 >= PATH_MAX) {
-               printf_error("Home directory path is too long: `%s`\n",
-                       home_dir);
+       length = strlen(home_dir) + strlen(HOME_PLUGIN_SUBPATH) + 1;
+
+       if (length >= PATH_MAX) {
+               BT_LOGW("Home directory path is too long: length=%zu",
+                       length);
                goto end;
        }
 
@@ -217,6 +246,7 @@ bool bt_common_colors_supported(void)
        static bool supports_colors = false;
        static bool supports_colors_set = false;
        const char *term;
+       const char *force;
 
        if (supports_colors_set) {
                goto end;
@@ -224,6 +254,12 @@ bool bt_common_colors_supported(void)
 
        supports_colors_set = true;
 
+       force = getenv("BABELTRACE_FORCE_COLORS");
+       if (force && strcmp(force, "1") == 0) {
+               supports_colors = true;
+               goto end;
+       }
+
        term = getenv("TERM");
        if (!term) {
                goto end;
@@ -1125,3 +1161,18 @@ end:
 
        return norm_path;
 }
+
+BT_HIDDEN
+size_t bt_common_get_page_size(void)
+{
+       int page_size;
+
+       page_size = bt_sysconf(_SC_PAGESIZE);
+       if (page_size < 0) {
+               BT_LOGF("Cannot get system's page size: ret=%d",
+                       page_size);
+               abort();
+       }
+
+       return page_size;
+}