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synced 2022-11-09 12:17:21 -05:00
cb14c4a535
If fmt is NULL, ptitle is uninitialized and used. SETPROCTITLE(3bsd) says "If fmt is NULL, the process title is restored", but looks like the feature is not implemented in missing/setproctitle.c. At least the source code of ruby does not pass NULL to the function. So I assume this function requires non-NULL fmt. This issue was found by Coverity Scan.
175 lines
4.8 KiB
C
175 lines
4.8 KiB
C
/* Based on setproctitle.c from openssh-5.6p1 */
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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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#include "ruby.h"
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#include "ruby/util.h"
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#define compat_init_setproctitle ruby_init_setproctitle
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RUBY_FUNC_EXPORTED void ruby_init_setproctitle(int argc, char *argv[]);
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#ifndef HAVE_SETPROCTITLE
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#include <stdarg.h>
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#include <stdlib.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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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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#if defined(__APPLE__)
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# ifdef HAVE_CRT_EXTERNS_H
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# include <crt_externs.h>
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# undef environ
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# define environ (*_NSGetEnviron())
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# else
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# include "crt_externs.h"
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# endif
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#endif
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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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static size_t argv_len = 0;
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static char **argv1_addr = NULL;
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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(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 *lastenvp = 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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lastenvp = lastargv;
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for (i = 0; envp[i] != NULL; i++) {
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if (lastenvp + 1 == envp[i])
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lastenvp = envp[i] + strlen(envp[i]);
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}
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/* We keep argv[1], argv[2], etc. at this moment,
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because the ps command of AIX refers to them. */
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argv1_addr = &argv[1];
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argv_start = argv[0];
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argv_len = lastargv - argv[0];
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argv_env_len = lastenvp - argv[0];
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for (i = 0; envp[i] != NULL; i++)
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environ[i] = ruby_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 ptitle[1024];
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size_t len;
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size_t argvlen;
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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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/* fmt must be non-NULL */
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va_start(ap, fmt);
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vsnprintf(ptitle, sizeof(ptitle), fmt, ap);
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va_end(ap);
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#if SPT_TYPE == SPT_PSTAT
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pst.pst_command = ptitle;
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pstat(PSTAT_SETCMD, pst, strlen(ptitle), 0, 0);
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#elif SPT_TYPE == SPT_REUSEARGV
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len = strlcpy(argv_start, ptitle, argv_env_len);
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argvlen = len > argv_len ? argv_env_len : argv_len;
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for(; len < argvlen; len++)
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argv_start[len] = SPT_PADCHAR;
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/* argv[1], argv[2], etc. are no longer valid. */
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*argv1_addr = NULL;
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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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