/*
- * Modified for OpenSSH by Kevin Steves
- * October 2000
+ * Based on src/backend/utils/misc/pg_status.c from
+ * PostgreSQL Database Management System
+ *
+ * Portions Copyright (c) 1996-2001, The PostgreSQL Global Development Group
+ *
+ * Portions Copyright (c) 1994, The Regents of the University of California
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose, without fee, and without a written agreement
+ * is hereby granted, provided that the above copyright notice and this
+ * paragraph and the following two paragraphs appear in all copies.
+ *
+ * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
+ * LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
+ * DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*/
-/*
- * Copyright (c) 1994, 1995 Christopher G. Demetriou
- * All rights reserved.
+/*--------------------------------------------------------------------
+ * ps_status.c
+ *
+ * Routines to support changing the ps display of PostgreSQL backends
+ * to contain some useful information. Mechanism differs wildly across
+ * platforms.
*
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Christopher G. Demetriou
- * for the NetBSD Project.
- * 4. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission
+ * $Header$
*
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
+ * Copyright 2000 by PostgreSQL Global Development Group
+ * various details abducted from various places
+ *--------------------------------------------------------------------
*/
-#if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: setproctitle.c,v 1.8 2001/11/06 19:21:40 art Exp $";
-#endif /* LIBC_SCCS and not lint */
-
#include "includes.h"
#ifndef HAVE_SETPROCTITLE
-#define SPT_NONE 0
-#define SPT_PSTAT 1
+#include <unistd.h>
+#ifdef HAVE_SYS_PSTAT_H
+#include <sys/pstat.h> /* for HP-UX */
+#endif
+#ifdef HAVE_PS_STRINGS
+#include <machine/vmparam.h> /* for old BSD */
+#include <sys/exec.h>
+#endif
+
+extern char **environ;
-#ifndef SPT_TYPE
-#define SPT_TYPE SPT_NONE
+/*------
+ * Alternative ways of updating ps display:
+ *
+ * PS_USE_PSTAT
+ * use the pstat(PSTAT_SETCMD, )
+ * (HPUX)
+ * PS_USE_PS_STRINGS
+ * assign PS_STRINGS->ps_argvstr = "string"
+ * (some BSD systems)
+ * PS_USE_CHANGE_ARGV
+ * assign argv[0] = "string"
+ * (some other BSD systems)
+ * PS_USE_CLOBBER_ARGV
+ * write over the argv and environment area
+ * (most SysV-like systems)
+ * PS_USE_NONE
+ * don't update ps display
+ * (This is the default, as it is safest.)
+ */
+#if defined(HAVE_PSTAT) && defined(PSTAT_SETCMD)
+#define PS_USE_PSTAT
+#elif defined(HAVE_PS_STRINGS)
+#define PS_USE_PS_STRINGS
+#elif defined(BSD) || defined(__bsdi__) || defined(__hurd__)
+#define PS_USE_CHANGE_ARGV
+#elif defined(__linux__) || defined(_AIX)
+#define PS_USE_CLOBBER_ARGV
+#else
+#define PS_USE_NONE
#endif
-#if SPT_TYPE == SPT_PSTAT
-#include <sys/param.h>
-#include <sys/pstat.h>
-#endif /* SPT_TYPE == SPT_PSTAT */
+/* Different systems want the buffer padded differently */
+#if defined(_AIX) || defined(__linux__) || defined(__QNX__) || defined(__svr4__)
+#define PS_PADDING '\0'
+#else
+#define PS_PADDING ' '
+#endif
-#define MAX_PROCTITLE 2048
+/*
+ * argv clobbering uses existing argv space, all other methods need a buffer
+ */
+#ifndef PS_USE_CLOBBER_ARGV
+static char ps_buffer[256];
+static const size_t ps_buffer_size = sizeof(ps_buffer);
+#else /* PS_USE_CLOBBER_ARGV */
+static char *ps_buffer; /* will point to argv area */
+static size_t ps_buffer_size; /* space determined at run time */
+#endif /* PS_USE_CLOBBER_ARGV */
+
+/* save the original argv[] location here */
+static int save_argc;
+static char **save_argv;
extern char *__progname;
/*
- * Set Process Title (SPT) defines. Modeled after sendmail's
- * SPT type definition strategy.
- *
- * SPT_TYPE:
- *
- * SPT_NONE: Don't set the process title. Default.
- * SPT_PSTAT: Use pstat(PSTAT_SETCMD). HP-UX specific.
+ * Call this to update the ps status display to a fixed prefix plus an
+ * indication of what you're currently doing passed in the argument.
*/
-
void
setproctitle(const char *fmt, ...)
{
-#if SPT_TYPE != SPT_NONE
+#ifdef PS_USE_PSTAT
+ union pstun pst;
+#endif
+#ifndef PS_USE_NONE
+ ssize_t used;
va_list ap;
-
- char buf[MAX_PROCTITLE];
- size_t used;
-#if SPT_TYPE == SPT_PSTAT
- union pstun pst;
-#endif /* SPT_TYPE == SPT_PSTAT */
+ /* no ps display if you didn't call save_ps_display_args() */
+ if (save_argv == NULL)
+ return;
+#ifdef PS_USE_CLOBBER_ARGV
+ /* If ps_buffer is a pointer, it might still be null */
+ if (ps_buffer == NULL)
+ return;
+#endif /* PS_USE_CLOBBER_ARGV */
+
+ /*
+ * Overwrite argv[] to point at appropriate space, if needed
+ */
+#ifdef PS_USE_CHANGE_ARGV
+ save_argv[0] = ps_buffer;
+ save_argv[1] = NULL;
+#endif /* PS_USE_CHANGE_ARGV */
+
+#ifdef PS_USE_CLOBBER_ARGV
+ save_argv[1] = NULL;
+#endif /* PS_USE_CLOBBER_ARGV */
+
+ /*
+ * Make fixed prefix of ps display.
+ */
va_start(ap, fmt);
- if (fmt != NULL) {
- used = snprintf(buf, MAX_PROCTITLE, "%s: ", __progname);
- if (used >= MAX_PROCTITLE)
- used = MAX_PROCTITLE - 1;
- (void)vsnprintf(buf + used, MAX_PROCTITLE - used, fmt, ap);
- } else
- (void)snprintf(buf, MAX_PROCTITLE, "%s", __progname);
+ if (fmt == NULL)
+ snprintf(ps_buffer, ps_buffer_size, "%s", __progname);
+ else {
+ used = snprintf(ps_buffer, ps_buffer_size, "%s: ", __progname);
+ if (used == -1 || used >= ps_buffer_size)
+ used = ps_buffer_size;
+ vsnprintf(ps_buffer + used, ps_buffer_size - used, fmt, ap);
+ }
va_end(ap);
- used = strlen(buf);
-#if SPT_TYPE == SPT_PSTAT
- pst.pst_command = buf;
- pstat(PSTAT_SETCMD, pst, used, 0, 0);
-#endif /* SPT_TYPE == SPT_PSTAT */
+#if 0
+ error("XXXXXXXXX %s", __progname);
+ error("XXXXXXXXX %d", ps_buffer_size);
+ error("XXXXXXXXX %s", ps_buffer);
+#endif
+
+#ifdef PS_USE_PSTAT
+ pst.pst_command = ps_buffer;
+ pstat(PSTAT_SETCMD, pst, strlen(ps_buffer), 0, 0);
+#endif /* PS_USE_PSTAT */
+
+#ifdef PS_USE_PS_STRINGS
+ PS_STRINGS->ps_nargvstr = 1;
+ PS_STRINGS->ps_argvstr = ps_buffer;
+#endif /* PS_USE_PS_STRINGS */
-#endif /* SPT_TYPE != SPT_NONE */
+#ifdef PS_USE_CLOBBER_ARGV
+ /* pad unused memory */
+ used = strlen(ps_buffer);
+ memset(ps_buffer + used, PS_PADDING, ps_buffer_size - used);
+#endif /* PS_USE_CLOBBER_ARGV */
+
+#endif /* PS_USE_NONE */
}
+
#endif /* HAVE_SETPROCTITLE */
+
+/*
+ * Call this early in startup to save the original argc/argv values.
+ *
+ * argv[] will not be overwritten by this routine, but may be overwritten
+ * during setproctitle. Also, the physical location of the environment
+ * strings may be moved, so this should be called before any code that
+ * might try to hang onto a getenv() result.
+ */
+void
+compat_init_setproctitle(int argc, char *argv[])
+{
+#ifdef PS_USE_CLOBBER_ARGV
+ char *end_of_area = NULL;
+ char **new_environ;
+ int i;
+#endif
+
+ save_argc = argc;
+ save_argv = argv;
+
+#ifdef PS_USE_CLOBBER_ARGV
+ /*
+ * If we're going to overwrite the argv area, count the available
+ * space. Also move the environment to make additional room.
+ */
+
+ /*
+ * check for contiguous argv strings
+ */
+ for (i = 0; i < argc; i++) {
+ if (i == 0 || end_of_area + 1 == argv[i])
+ end_of_area = argv[i] + strlen(argv[i]);
+ }
+
+ /* probably can't happen? */
+ if (end_of_area == NULL) {
+ ps_buffer = NULL;
+ ps_buffer_size = 0;
+ return;
+ }
+
+ /*
+ * check for contiguous environ strings following argv
+ */
+ for (i = 0; environ[i] != NULL; i++) {
+ if (end_of_area + 1 == environ[i])
+ end_of_area = environ[i] + strlen(environ[i]);
+ }
+
+ ps_buffer = argv[0];
+ ps_buffer_size = end_of_area - argv[0] - 1;
+
+ /*
+ * Duplicate and move the environment out of the way
+ */
+ new_environ = malloc(sizeof(char *) * (i + 1));
+ for (i = 0; environ[i] != NULL; i++)
+ new_environ[i] = strdup(environ[i]);
+ new_environ[i] = NULL;
+ environ = new_environ;
+#endif /* PS_USE_CLOBBER_ARGV */
+}
+
andersk / openssh.git / commitdiff
