--
+ Copyright © 2010 William Ahern
+
+ 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.
+
+ --
+
This code implements the MD5 message-digest algorithm.
The algorithm is due to Ron Rivest. This code was
written by Colin Plumb in 1993, no copyright is claimed.
-/*
- * Copyright © 2010 Guillem Jover <guillem@hadrons.org>
+/* ==========================================================================
+ * setproctitle.c - Linux/Darwin setproctitle.
+ * --------------------------------------------------------------------------
+ * Copyright (C) 2010 William Ahern
+ *
+ * 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:
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
*
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
- * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 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.
+ * ==========================================================================
+ */
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include <stddef.h> /* NULL size_t */
+#include <stdarg.h> /* va_list va_start va_end */
+#include <stdlib.h> /* malloc(3) setenv(3) clearenv(3) setproctitle(3) getprogname(3) */
+#include <stdio.h> /* vsnprintf(3) snprintf(3) */
+
+#include <string.h> /* strlen(3) strchr(3) strdup(3) memset(3) memcpy(3) */
+
+#include <errno.h> /* errno program_invocation_name program_invocation_short_name */
+
+
+#if !defined(HAVE_SETPROCTITLE)
+#define HAVE_SETPROCTITLE (defined __NetBSD__ || defined __FreeBSD__ || defined __OpenBSD__)
+#endif
+
+
+#if !HAVE_SETPROCTITLE
+#if (defined __linux || defined __APPLE__) && defined __GNUC__
+
+
+static struct {
+ /* original value */
+ const char *arg0;
+
+ /* title space available */
+ char *base, *end;
+
+ /* pointer to original nul character within base */
+ char *nul;
+
+ _Bool reset;
+ int error;
+} SPT;
+
+
+#ifndef SPT_MIN
+#define SPT_MIN(a, b) (((a) < (b))? (a) : (b))
+#endif
+
+static inline size_t spt_min(size_t a, size_t b) {
+ return SPT_MIN(a, b);
+} /* spt_min() */
+
+
+/*
+ * For discussion on the portability of the various methods, see
+ * http://lists.freebsd.org/pipermail/freebsd-stable/2008-June/043136.html
*/
+static int spt_clearenv(void) {
+#if __GLIBC__
+ clearenv();
+
+ return 0;
+#else
+ extern char **environ;
+ char **tmp;
+
+ if (!(tmp = malloc(sizeof *tmp)))
+ return errno;
+
+ tmp[0] = NULL;
+ environ = tmp;
+
+ return 0;
+#endif
+} /* spt_clearenv() */
+
+
+static int spt_copyenv(char *oldenv[]) {
+ extern char **environ;
+ char *eq;
+ int i, error;
+
+ if (environ != oldenv)
+ return 0;
+
+ if ((error = spt_clearenv()))
+ goto error;
+
+ for (i = 0; oldenv[i]; i++) {
+ if (!(eq = strchr(oldenv[i], '=')))
+ continue;
+
+ *eq = '\0';
+ error = (0 != setenv(oldenv[i], eq + 1, 1))? errno : 0;
+ *eq = '=';
+
+ if (error)
+ goto error;
+ }
+
+ return 0;
+error:
+ environ = oldenv;
+
+ return error;
+} /* spt_copyenv() */
+
+
+static int spt_copyargs(int argc, char *argv[]) {
+ char *tmp;
+ int i;
+
+ for (i = 1; i < argc || (i >= argc && argv[i]); i++) {
+ if (!argv[i])
+ continue;
+
+ if (!(tmp = strdup(argv[i])))
+ return errno;
+
+ argv[i] = tmp;
+ }
+
+ return 0;
+} /* spt_copyargs() */
+
+
+void spt_init(int argc, char *argv[], char *envp[]) __attribute__((constructor));
+
+void spt_init(int argc, char *argv[], char *envp[]) {
+ char *base, *end, *nul, *tmp;
+ int i, error;
+
+ if (!(base = argv[0]))
+ return;
+
+ nul = &base[strlen(base)];
+ end = nul + 1;
+
+ for (i = 0; i < argc || (i >= argc && argv[i]); i++) {
+ if (!argv[i] || argv[i] < end)
+ continue;
+
+ end = argv[i] + strlen(argv[i]) + 1;
+ }
+
+ for (i = 0; envp[i]; i++) {
+ if (envp[i] < end)
+ continue;
+
+ end = envp[i] + strlen(envp[i]) + 1;
+ }
+
+ if (!(SPT.arg0 = strdup(argv[0])))
+ goto syerr;
+
+#if __GLIBC__
+ if (!(tmp = strdup(program_invocation_name)))
+ goto syerr;
+
+ program_invocation_name = tmp;
+
+ if (!(tmp = strdup(program_invocation_short_name)))
+ goto syerr;
+
+ program_invocation_short_name = tmp;
+#elif __APPLE__
+ if (!(tmp = strdup(getprogname())))
+ goto syerr;
+
+ setprogname(tmp);
+#endif
+
+
+ if ((error = spt_copyenv(envp)))
+ goto error;
+
+ if ((error = spt_copyargs(argc, argv)))
+ goto error;
+
+ SPT.nul = nul;
+ SPT.base = base;
+ SPT.end = end;
+
+ return;
+syerr:
+ error = errno;
+error:
+ SPT.error = error;
+} /* spt_init() */
+
+
+#ifndef SPT_MAXTITLE
+#define SPT_MAXTITLE 255
+#endif
+
+void setproctitle(const char *fmt, ...) {
+ char buf[SPT_MAXTITLE + 1]; /* use buffer in case argv[0] is passed */
+ va_list ap;
+ char *nul;
+ int len, error;
+
+ if (!SPT.base)
+ return;
+
+ if (fmt) {
+ va_start(ap, fmt);
+ len = vsnprintf(buf, sizeof buf, fmt, ap);
+ va_end(ap);
+ } else {
+ len = snprintf(buf, sizeof buf, "%s", SPT.arg0);
+ }
+
+ if (len <= 0)
+ { error = errno; goto error; }
+
+ if (!SPT.reset) {
+ memset(SPT.base, 0, SPT.end - SPT.base);
+ SPT.reset = 1;
+ } else {
+ memset(SPT.base, 0, spt_min(sizeof buf, SPT.end - SPT.base));
+ }
+
+ len = spt_min(len, spt_min(sizeof buf, SPT.end - SPT.base) - 1);
+ memcpy(SPT.base, buf, len);
+ nul = &SPT.base[len];
+
+ if (nul < SPT.nul) {
+ *SPT.nul = '.';
+ } else if (nul == SPT.nul && &nul[1] < SPT.end) {
+ *SPT.nul = ' ';
+ *++nul = '\0';
+ }
+
+ return;
+error:
+ SPT.error = error;
+} /* setproctitle() */
+
-void
-setproctitle(const char *fmt, ...)
-{
- /* Stub so that we can implement it later on and programs will
- * automatically benefit from it, w/o needing to recompile. */
-}
+#endif /* __linux || __APPLE__ */
+#endif /* !HAVE_SETPROCTITLE */
projects / thirdparty / libbsd.git / commitdiff
