Mercurial > dovecot > core-2.2
view src/lib/process-title.c @ 10582:615eef3139c2 HEAD
Updated copyright notices to include year 2010.
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Mon, 25 Jan 2010 01:19:08 +0200 |
parents | 3d13ea0c687f |
children | 348eb4754085 |
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/* Copyright (c) 2002-2010 Dovecot authors, see the included COPYING file */ #include "lib.h" #include "process-title.h" #include <stdlib.h> /* NetBSD, OpenBSD */ #include <unistd.h> /* FreeBSD */ static char *process_name = NULL; #ifdef HAVE_SETPROCTITLE # undef PROCTITLE_HACK #endif #ifdef PROCTITLE_HACK #define PROCTITLE_CLEAR_CHAR 0xab static char *process_title; static size_t process_title_len, process_title_clean_pos; static void *argv_memblock, *environ_memblock; static void proctitle_hack_init(char *argv[], char *env[]) { char *last; unsigned int i; bool clear_env; /* find the last argv or environment string. it should always be the last string in environ, but don't rely on it. this is what openssh does, so hopefully it's safe enough. */ last = argv[0] + strlen(argv[0]) + 1; for (i = 1; argv[i] != NULL; i++) { if (argv[i] == last) last = argv[i] + strlen(argv[i]) + 1; } clear_env = last == env[0]; for (i = 0; env[i] != NULL; i++) { if (env[i] == last) last = env[i] + strlen(env[i]) + 1; } process_title = argv[0]; process_title_len = last - argv[0]; /* if there are problems with this approach, try to make sure we notice it */ if (clear_env) { memset(env[0], PROCTITLE_CLEAR_CHAR, last - env[0]); process_title_clean_pos = env[0] - process_title; } else { process_title_clean_pos = 0; } } static char **argv_dup(char *old_argv[], void **memblock_r) { /* @UNSAFE */ void *memblock, *memblock_end; char **new_argv; unsigned int i, count; size_t len, memblock_len = 0; for (count = 0; old_argv[count] != NULL; count++) memblock_len += strlen(old_argv[count]) + 1; memblock_len += sizeof(char *) * (count + 1); memblock = malloc(memblock_len); if (memblock == NULL) i_fatal_status(FATAL_OUTOFMEM, "malloc() failed: %m"); *memblock_r = memblock; memblock_end = PTR_OFFSET(memblock, memblock_len); new_argv = memblock; memblock = PTR_OFFSET(memblock, sizeof(char *) * (count + 1)); for (i = 0; i < count; i++) { new_argv[i] = memblock; len = strlen(old_argv[i]) + 1; memcpy(memblock, old_argv[i], len); memblock = PTR_OFFSET(memblock, len); } i_assert(memblock == memblock_end); new_argv[i] = NULL; return new_argv; } static void proctitle_hack_set(const char *title) { size_t len = strlen(title); if (len >= process_title_len) len = process_title_len - 1; memcpy(process_title, title, len); process_title[len++] = '\0'; if (len < process_title_clean_pos) { memset(process_title + len, PROCTITLE_CLEAR_CHAR, process_title_clean_pos - len); process_title_clean_pos = len; } else if (process_title_clean_pos != 0) { process_title_clean_pos = len; } } #endif void process_title_init(char **argv[]) { #ifdef PROCTITLE_HACK extern char **environ; char **orig_argv = *argv; char **orig_environ = environ; *argv = argv_dup(orig_argv, &argv_memblock); environ = argv_dup(orig_environ, &environ_memblock); proctitle_hack_init(orig_argv, orig_environ); #endif process_name = (*argv)[0]; } void process_title_set(const char *title ATTR_UNUSED) { i_assert(process_name != NULL); #ifdef HAVE_SETPROCTITLE if (title == NULL) setproctitle(NULL); else setproctitle("%s", title); #elif defined(PROCTITLE_HACK) proctitle_hack_set(t_strconcat(process_name, " ", title, NULL)); #endif } void process_title_deinit(void) { #ifdef PROCTITLE_HACK free(argv_memblock); free(environ_memblock); #endif }