introduce missing/setproctitle.c

* include/ruby/missing.h: add setproctitle() declaration.
* missing/setproctitle.c: added.
* configure.in: add check for missing/setproctitle.c.

* ruby.c (ruby_process_options): add to call compat_init_setproctitle().
* ruby.c (set_arg0): remove all platform specific code. it's
  moved to missing/setproctitle.c.
* ruby.c (origarg): remove len field. It's no longer used.
* ruby.c (get_arglen): removed.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31565 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 160 insertions, 0 deletions

diff --git a/missing/setproctitle.c b/missing/setproctitle.c
new file mode 100644
index 0000000000..23b09d259b
--- /dev/null
+++ b/missing/setproctitle.c
@@ -0,0 +1,160 @@
+/* Based on setproctitle.c from openssh-5.6p1 */
+/* Based on conf.c from UCB sendmail 8.8.8 */
+
+/*
+ * Copyright 2003 Damien Miller
+ * Copyright (c) 1983, 1995-1997 Eric P. Allman
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ */
+
+#include "ruby.h"
+
+#ifndef HAVE_SETPROCTITLE
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+#ifdef HAVE_SYS_PSTAT_H
+#include <sys/pstat.h>
+#endif
+#include <string.h>
+
+#define SPT_NONE	0	/* don't use it at all */
+#define SPT_PSTAT	1	/* use pstat(PSTAT_SETCMD, ...) */
+#define SPT_REUSEARGV	2	/* cover argv with title information */
+
+#ifndef SPT_TYPE
+# define SPT_TYPE	SPT_NONE
+#endif
+
+#ifndef SPT_PADCHAR
+# define SPT_PADCHAR	'\0'
+#endif
+
+#if SPT_TYPE == SPT_REUSEARGV
+static char *argv_start = NULL;
+static size_t argv_env_len = 0;
+static size_t argv_len = 0;
+#endif
+
+#endif /* HAVE_SETPROCTITLE */
+
+void
+compat_init_setproctitle(int argc, char *argv[])
+{
+#if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV
+	extern char **environ;
+	char *lastargv = NULL;
+	char *lastenvp = NULL;
+	char **envp = environ;
+	int i;
+
+	/*
+	 * NB: This assumes that argv has already been copied out of the
+	 * way. This is true for sshd, but may not be true for other
+	 * programs. Beware.
+	 */
+
+	if (argc == 0 || argv[0] == NULL)
+		return;
+
+	/* Fail if we can't allocate room for the new environment */
+	for (i = 0; envp[i] != NULL; i++)
+		;
+	if ((environ = calloc(i + 1, sizeof(*environ))) == NULL) {
+		environ = envp;	/* put it back */
+		return;
+	}
+
+	/*
+	 * Find the last argv string or environment variable within
+	 * our process memory area.
+	 */
+	for (i = 0; i < argc; i++) {
+		if (lastargv == NULL || lastargv + 1 == argv[i])
+			lastargv = argv[i] + strlen(argv[i]);
+	}
+	lastenvp = lastargv;
+	for (i = 0; envp[i] != NULL; i++) {
+		if (lastenvp + 1 == envp[i])
+			lastenvp = envp[i] + strlen(envp[i]);
+	}
+
+	argv[1] = NULL;
+	argv_start = argv[0];
+	argv_len = lastargv - argv[0];
+	argv_env_len = lastenvp - argv[0];
+
+	/*
+	 * Copy environment
+	 * XXX - will truncate env on strdup fail
+	 */
+	for (i = 0; envp[i] != NULL; i++)
+		environ[i] = strdup(envp[i]);
+	environ[i] = NULL;
+#endif /* SPT_REUSEARGV */
+}
+
+#ifndef HAVE_SETPROCTITLE
+void
+setproctitle(const char *fmt, ...)
+{
+#if SPT_TYPE != SPT_NONE
+	va_list ap;
+	char ptitle[1024];
+	size_t len;
+	size_t argvlen;
+#if SPT_TYPE == SPT_PSTAT
+	union pstun pst;
+#endif
+
+#if SPT_TYPE == SPT_REUSEARGV
+	if (argv_env_len <= 0)
+		return;
+#endif
+
+	va_start(ap, fmt);
+	if (fmt != NULL) {
+		vsnprintf(ptitle, sizeof(ptitle) , fmt, ap);
+	}
+	va_end(ap);
+
+#if SPT_TYPE == SPT_PSTAT
+	pst.pst_command = ptitle;
+	pstat(PSTAT_SETCMD, pst, strlen(ptitle), 0, 0);
+#elif SPT_TYPE == SPT_REUSEARGV
+	len = strlcpy(argv_start, ptitle, argv_env_len);
+	argvlen = len > argv_len ? argv_env_len : argv_len;
+	for(; len < argvlen; len++)
+		argv_start[len] = SPT_PADCHAR;
+#endif
+
+#endif /* SPT_NONE */
+}
+
+#endif /* HAVE_SETPROCTITLE */