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/* Based on conf.c from UCB sendmail 8.8.8 */
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/*
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* Copyright 2003 Damien Miller
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* Copyright (c) 1983, 1995-1997 Eric P. Allman
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef HAVE_SETPROCTITLE
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifdef HAVE_SYS_PSTAT_H
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#include <sys/pstat.h>
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#endif
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#include <string.h>
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#define SPT_NONE 0 /* don't use it at all */
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#define SPT_PSTAT 1 /* use pstat(PSTAT_SETCMD, ...) */
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#define SPT_REUSEARGV 2 /* cover argv with title information */
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#ifndef SPT_TYPE
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# define SPT_TYPE SPT_NONE
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#endif
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#ifndef SPT_PADCHAR
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# define SPT_PADCHAR '\0'
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#endif
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#if SPT_TYPE == SPT_REUSEARGV
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static char *argv_start = NULL;
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static size_t argv_env_len = 0;
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#endif
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#endif /* HAVE_SETPROCTITLE */
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void
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compat_init_setproctitle(int argc, char *argv[])
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{
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#if !defined(HAVE_SETPROCTITLE) && \
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defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV
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extern char **environ;
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char *lastargv = NULL;
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char **envp = environ;
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int i;
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/*
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* NB: This assumes that argv has already been copied out of the
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* way. This is true for sshd, but may not be true for other
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* programs. Beware.
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*/
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if (argc == 0 || argv[0] == NULL)
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return;
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/* Fail if we can't allocate room for the new environment */
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for (i = 0; envp[i] != NULL; i++)
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;
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if ((environ = calloc(i + 1, sizeof(*environ))) == NULL) {
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environ = envp; /* put it back */
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return;
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}
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/*
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* Find the last argv string or environment variable within
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* our process memory area.
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*/
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for (i = 0; i < argc; i++) {
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if (lastargv == NULL || lastargv + 1 == argv[i])
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lastargv = argv[i] + strlen(argv[i]);
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}
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for (i = 0; envp[i] != NULL; i++) {
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if (lastargv + 1 == envp[i])
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lastargv = envp[i] + strlen(envp[i]);
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}
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argv[1] = NULL;
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argv_start = argv[0];
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argv_env_len = lastargv - argv[0] - 1;
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/*
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* Copy environment
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* XXX - will truncate env on strdup fail
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*/
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for (i = 0; envp[i] != NULL; i++)
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environ[i] = strdup(envp[i]);
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environ[i] = NULL;
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#endif /* SPT_REUSEARGV */
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}
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#ifndef HAVE_SETPROCTITLE
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void
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setproctitle(const char *fmt, ...)
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{
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#if SPT_TYPE != SPT_NONE
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va_list ap;
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char buf[1024];
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size_t len;
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int r;
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extern char *__progname;
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#if SPT_TYPE == SPT_PSTAT
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union pstun pst;
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#endif
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#if SPT_TYPE == SPT_REUSEARGV
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if (argv_env_len <= 0)
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return;
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#endif
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strlcpy(buf, __progname, sizeof(buf));
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r = -1;
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va_start(ap, fmt);
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if (fmt != NULL) {
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len = strlcat(buf, ": ", sizeof(buf));
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if (len < sizeof(buf))
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r = vsnprintf(buf + len, sizeof(buf) - len , fmt, ap);
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}
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va_end(ap);
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if (r == -1 || (size_t)r >= sizeof(buf) - len)
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return;
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#if SPT_TYPE == SPT_PSTAT
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pst.pst_command = buf;
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pstat(PSTAT_SETCMD, pst, strlen(buf), 0, 0);
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#elif SPT_TYPE == SPT_REUSEARGV
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/* debug("setproctitle: copy \"%s\" into len %d",
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buf, argv_env_len); */
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len = strlcpy(argv_start, buf, argv_env_len);
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for(; len < argv_env_len; len++)
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argv_start[len] = SPT_PADCHAR;
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#endif
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#endif /* SPT_NONE */
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}
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#endif /* HAVE_SETPROCTITLE */
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