unix: move uv_set_process_title() to proctitle.c

Use hijacking argv array to change process' title. It seems to be working fine
on almost every platform (at least it should not break anything as it's used in
nginx in a similar way).

config-unix.mk

@@ -128,6 +128,10 @@ else
 RUNNER_LINKFLAGS += -pthread
 endif
 
+ifneq (FreeBSD,$(uname_S))
+OBJS += src/unix/proctitle.o
+endif
+
 RUNNER_LIBS=
 RUNNER_SRC=test/runner-unix.c
 

src/unix/darwin.c

@@ -41,8 +41,6 @@
 #include <sys/sysctl.h>
 #include <unistd.h>  /* sysconf */
 
-static char *process_title;
-
 #if TARGET_OS_IPHONE
 /* see: http://developer.apple.com/library/mac/#qa/qa1398/_index.html */
 uint64_t uv_hrtime() {
@@ -138,31 +136,6 @@ void uv_loadavg(double avg[3]) {
 }
 
 
-char** uv_setup_args(int argc, char** argv) {
-  process_title = argc ? strdup(argv[0]) : NULL;
-  return argv;
-}
-
-
-uv_err_t uv_set_process_title(const char* title) {
-  /* TODO implement me */
-  return uv__new_artificial_error(UV_ENOSYS);
-}
-
-
-uv_err_t uv_get_process_title(char* buffer, size_t size) {
-  if (process_title) {
-    strncpy(buffer, process_title, size);
-  } else {
-    if (size > 0) {
-      buffer[0] = '\0';
-    }
-  }
-
-  return uv_ok_;
-}
-
-
 uv_err_t uv_resident_set_memory(size_t* rss) {
   struct task_basic_info t_info;
   mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;

src/unix/linux/linux-core.c

@@ -58,11 +58,6 @@
 
 static char buf[MAXPATHLEN + 1];
 
-static struct {
-  char *str;
-  size_t len;
-} process_title;
-
 
 /*
  * There's probably some way to get time from Linux than gettimeofday(). What
@@ -112,73 +107,6 @@ uint64_t uv_get_total_memory(void) {
 }
 
 
-char** uv_setup_args(int argc, char** argv) {
-  char **new_argv;
-  char **new_env;
-  size_t size;
-  int envc;
-  char *s;
-  int i;
-
-  for (envc = 0; environ[envc]; envc++);
-
-  s = envc ? environ[envc - 1] : argv[argc - 1];
-
-  process_title.str = argv[0];
-  process_title.len = s + strlen(s) + 1 - argv[0];
-
-  size = process_title.len;
-  size += (argc + 1) * sizeof(char **);
-  size += (envc + 1) * sizeof(char **);
-
-  if ((s = (char *) malloc(size)) == NULL) {
-    process_title.str = NULL;
-    process_title.len = 0;
-    return argv;
-  }
-
-  new_argv = (char **) s;
-  new_env = new_argv + argc + 1;
-  s = (char *) (new_env + envc + 1);
-  memcpy(s, process_title.str, process_title.len);
-
-  for (i = 0; i < argc; i++)
-    new_argv[i] = s + (argv[i] - argv[0]);
-  new_argv[argc] = NULL;
-
-  s += environ[0] - argv[0];
-
-  for (i = 0; i < envc; i++)
-    new_env[i] = s + (environ[i] - environ[0]);
-  new_env[envc] = NULL;
-
-  environ = new_env;
-  return new_argv;
-}
-
-
-uv_err_t uv_set_process_title(const char* title) {
-  /* No need to terminate, last char is always '\0'. */
-  if (process_title.len)
-    strncpy(process_title.str, title, process_title.len - 1);
-
-  return uv_ok_;
-}
-
-
-uv_err_t uv_get_process_title(char* buffer, size_t size) {
-  if (process_title.str) {
-    strncpy(buffer, process_title.str, size);
-  } else {
-    if (size > 0) {
-      buffer[0] = '\0';
-    }
-  }
-
-  return uv_ok_;
-}
-
-
 uv_err_t uv_resident_set_memory(size_t* rss) {
   FILE* f;
   int itmp;

src/unix/openbsd.c

@@ -40,9 +40,6 @@
 #define NANOSEC ((uint64_t) 1e9)
 
 
-static char *process_title;
-
-
 uint64_t uv_hrtime(void) {
   struct timespec ts;
   clock_gettime(CLOCK_MONOTONIC, &ts);
@@ -137,33 +134,6 @@ uint64_t uv_get_total_memory(void) {
 }
 
 
-char** uv_setup_args(int argc, char** argv) {
-  process_title = argc ? strdup(argv[0]) : NULL;
-  return argv;
-}
-
-
-uv_err_t uv_set_process_title(const char* title) {
-  if (process_title) free(process_title);
-  process_title = strdup(title);
-  setproctitle(title);
-  return uv_ok_;
-}
-
-
-uv_err_t uv_get_process_title(char* buffer, size_t size) {
-  if (process_title) {
-    strncpy(buffer, process_title, size);
-  } else {
-    if (size > 0) {
-      buffer[0] = '\0';
-    }
-  }
-
-  return uv_ok_;
-}
-
-
 uv_err_t uv_resident_set_memory(size_t* rss) {
   kvm_t *kd = NULL;
   struct kinfo_proc *kinfo = NULL;

src/unix/proctitle.c

@@ -0,0 +1,102 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "internal.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+/* NOTE: FreeBSD is using it's own implementation of those functions */
+
+static struct {
+  char *str;
+  size_t len;
+} process_title;
+
+extern char** environ;
+
+
+char** uv_setup_args(int argc, char** argv) {
+  char **new_argv;
+  char **new_env;
+  size_t size;
+  int envc;
+  char *s;
+  int i;
+
+  for (envc = 0; environ[envc]; envc++);
+
+  s = envc ? environ[envc - 1] : argv[argc - 1];
+
+  process_title.str = argv[0];
+  process_title.len = s + strlen(s) + 1 - argv[0];
+
+  size = process_title.len;
+  size += (argc + 1) * sizeof(char **);
+  size += (envc + 1) * sizeof(char **);
+
+  if ((s = (char *) malloc(size)) == NULL) {
+    process_title.str = NULL;
+    process_title.len = 0;
+    return argv;
+  }
+
+  new_argv = (char **) s;
+  new_env = new_argv + argc + 1;
+  s = (char *) (new_env + envc + 1);
+  memcpy(s, process_title.str, process_title.len);
+
+  for (i = 0; i < argc; i++)
+    new_argv[i] = s + (argv[i] - argv[0]);
+  new_argv[argc] = NULL;
+
+  s += environ[0] - argv[0];
+
+  for (i = 0; i < envc; i++)
+    new_env[i] = s + (environ[i] - environ[0]);
+  new_env[envc] = NULL;
+
+  environ = new_env;
+  return new_argv;
+}
+
+
+uv_err_t uv_set_process_title(const char* title) {
+  /* No need to terminate, last char is always '\0'. */
+  if (process_title.len)
+    strncpy(process_title.str, title, process_title.len - 1);
+
+  return uv_ok_;
+}
+
+
+uv_err_t uv_get_process_title(char* buffer, size_t size) {
+  if (process_title.str) {
+    strncpy(buffer, process_title.str, size);
+  } else {
+    if (size > 0) {
+      buffer[0] = '\0';
+    }
+  }
+
+  return uv_ok_;
+}

src/unix/sunos.c

@@ -238,24 +238,6 @@ void uv__fs_event_close(uv_fs_event_t* handle) {
 #endif /* HAVE_PORTS_FS */
 
 
-char** uv_setup_args(int argc, char** argv) {
-  return argv;
-}
-
-
-uv_err_t uv_set_process_title(const char* title) {
-  return uv_ok_;
-}
-
-
-uv_err_t uv_get_process_title(char* buffer, size_t size) {
-  if (size > 0) {
-    buffer[0] = '\0';
-  }
-  return uv_ok_;
-}
-
-
 uv_err_t uv_resident_set_memory(size_t* rss) {
   psinfo_t psinfo;
   uv_err_t err;

uv.gyp

@@ -287,6 +287,9 @@
         [ 'OS=="mac" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd"', {
           'sources': [ 'src/unix/kqueue.c' ],
         }],
+        [ 'OS!="win" and OS!="freebsd"', {
+          'sources': [ 'src/unix/proctitle.c' ],
+        }],
       ]
     },