X-Git-Url: https://ruderich.org/simon/gitweb/?p=coloredstderr%2Fcoloredstderr.git;a=blobdiff_plain;f=src%2Ftrackfds.h;h=c749f5e1d6f6cf142e5ce455888fb6d75c7eea58;hp=5720b0cca54cc6d159ec8d760d35ae5883878509;hb=8a65b4486febf00e3fad5bafc3773a811e675a4c;hpb=9ff0ffbd28416538a4ccc2445875339c7eb20dfe

diff --git a/src/trackfds.h b/src/trackfds.h
index 5720b0c..c749f5e 100644
--- a/src/trackfds.h
+++ b/src/trackfds.h
@@ -1,7 +1,7 @@
 /*
  * Utility functions to track file descriptors.
  *
- * Copyright (C) 2013  Simon Ruderich
+ * Copyright (C) 2013-2015  Simon Ruderich
  *
  * 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
@@ -50,6 +50,36 @@ static void tracked_fds_debug(void) {
 }
 #endif
 
+/* Check if filename occurs in the comma-separated list ignore. */
+static int is_program_ignored(char const *filename, char const *ignore) {
+    size_t length;
+    size_t filename_length = strlen(filename);
+
+#ifdef DEBUG
+    debug("  is_program_ignored(\"%s\", \"%s\")\n", filename, ignore);
+#endif
+
+    for (; *ignore; ignore += length) {
+        while (*ignore == ',') {
+            ignore++;
+        }
+
+        length = strcspn(ignore, ",");
+        if (length == 0) {
+            break;
+        }
+
+        if (length != filename_length) {
+            continue;
+        }
+        if (!strncmp(filename, ignore, length)) {
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
 static int init_tracked_fds_list(size_t count) {
     assert(count > 0);
 
@@ -69,12 +99,14 @@ static int init_tracked_fds_list(size_t count) {
     return 1;
 }
 
-/* Load tracked file descriptors from the environment. The environment is used
+/*
+ * Load tracked file descriptors from the environment. The environment is used
  * to pass the information to child processes.
  *
  * ENV_NAME_FDS and ENV_NAME_PRIVATE_FDS have the following format: Each
  * descriptor as string followed by a comma; there's a trailing comma.
- * Example: "2,4,". */
+ * Example: "2,4,".
+ */
 static void init_from_environment(void) {
 #ifdef DEBUG
     debug("init_from_environment()\t\t[%d]\n", getpid());
@@ -88,6 +120,22 @@ static void init_from_environment(void) {
     initialized = 1;
     tracked_fds_list_count = 0;
 
+    /* Don't color writes to stderr for this binary (and its children) if it's
+     * contained in the comma-separated list in ENV_NAME_IGNORED_BINARIES. */
+    env = getenv(ENV_NAME_IGNORED_BINARIES);
+    if (env) {
+        char path[512];
+
+        /* TODO: Don't require /proc/. */
+        ssize_t written = readlink("/proc/self/exe", path, sizeof(path) - 1);
+        if (written > 0) {
+            path[written] = 0; /* readlink() does not null-terminate! */
+            if (is_program_ignored(path, env)) {
+                return;
+            }
+        }
+    }
+
     /* If ENV_NAME_FORCE_WRITE is set and not empty, allow writes to a non-tty
      * device. Use with care! Mainly used for the test suite. */
     env = getenv(ENV_NAME_FORCE_WRITE);
@@ -139,10 +187,6 @@ static void init_from_environment(void) {
             goto next;
         }
 
-        if (i == count) {
-            break;
-        }
-
         /* Replace ',' to null-terminate number for atoi(). */
         *x = 0;
 
@@ -360,7 +404,7 @@ inline static int tracked_fds_find(int fd) {
         return 0;
     }
 
-    if (fd < TRACKFDS_STATIC_COUNT) {
+    if (likely(fd < TRACKFDS_STATIC_COUNT)) {
         return tracked_fds[fd];
     }