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setproctitle.c
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setproctitle.c
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/* setproctitle -- set process title shown by ps(1)
$Id: setproctitle.c,v 1.15 2001/03/15 22:31:11 leg Exp $
* Copyright (c) 1998-2000 Carnegie Mellon University. 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. The name "Carnegie Mellon University" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For permission or any other legal
* details, please contact
* Office of Technology Transfer
* Carnegie Mellon University
* 5000 Forbes Avenue
* Pittsburgh, PA 15213-3890
* (412) 268-4387, fax: (412) 268-7395
* tech-transfer@andrew.cmu.edu
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Computing Services
* at Carnegie Mellon University (http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/*
* Copyright (c) 1983, 1995 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 <config.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "xmalloc.h"
# define VA_LOCAL_DECL va_list ap;
# define VA_START(f) va_start(ap, f)
# define VA_END va_end(ap)
# define MAXLINE 2048 /* max line length */
extern char **environ;
#ifdef USE_SETPROCTITLE
int setproctitle_enable = 1;
#else
int setproctitle_enable = 0;
#endif
static char **Argv = NULL; /* pointer to argument vector */
static char *LastArgv = NULL; /* end of argv */
/*
* Sets up a process to be able to use setproctitle()
*/
void setproctitle_init(int argc, char **argv, char **envp)
{
int i;
if (!setproctitle_enable) return;
/*
* Move the environment so setproctitle can use the space at
* the top of memory.
*/
for (i = 0; envp[i] != NULL; i++)
continue;
environ = (char **) xmalloc(sizeof (char *) * (i + 1));
for (i = 0; envp[i] != NULL; i++)
environ[i] = xstrdup(envp[i]);
environ[i] = NULL;
/*
* Save start and extent of argv for setproctitle.
*/
Argv = argv;
if (i > 0)
LastArgv = envp[i - 1] + strlen(envp[i - 1]);
else
LastArgv = argv[argc - 1] + strlen(argv[argc - 1]);
}
/*
** SETPROCTITLE -- set process title for ps
**
** Parameters:
** fmt -- a printf style format string.
** a, b, c -- possible parameters to fmt.
**
** Returns:
** none.
**
** Side Effects:
** Clobbers argv of our main procedure so ps(1) will
** display the title.
*/
#define SPT_NONE 0 /* don't use it at all */
#define SPT_REUSEARGV 1 /* cover argv with title information */
#define SPT_BUILTIN 2 /* use libc builtin */
#define SPT_PSTAT 3 /* use pstat(PSTAT_SETCMD, ...) */
#define SPT_PSSTRINGS 4 /* use PS_STRINGS->... */
#define SPT_SYSMIPS 5 /* use sysmips() supported by NEWS-OS 6 */
#define SPT_SCO 6 /* write kernel u. area */
#ifndef SPT_TYPE
# define SPT_TYPE SPT_REUSEARGV
#endif
#if SPT_TYPE != SPT_NONE && SPT_TYPE != SPT_BUILTIN
# if SPT_TYPE == SPT_PSTAT
# include <sys/pstat.h>
# endif
# if SPT_TYPE == SPT_PSSTRINGS
# include <machine/vmparam.h>
# include <sys/exec.h>
# ifndef PS_STRINGS /* hmmmm.... apparently not available after all */
# undef SPT_TYPE
# define SPT_TYPE SPT_REUSEARGV
# else
# ifndef NKPDE /* FreeBSD 2.0 */
# define NKPDE 63
typedef unsigned int *pt_entry_t;
# endif
# endif
# endif
# if SPT_TYPE == SPT_PSSTRINGS
# define SETPROC_STATIC static
# else
# define SETPROC_STATIC
# endif
# if SPT_TYPE == SPT_SYSMIPS
# include <sys/sysmips.h>
# include <sys/sysnews.h>
# endif
# if SPT_TYPE == SPT_SCO
# include <sys/immu.h>
# include <sys/dir.h>
# include <sys/user.h>
# include <sys/fs/s5param.h>
# if PSARGSZ > MAXLINE
# define SPT_BUFSIZE PSARGSZ
# endif
# endif
# ifndef SPT_PADCHAR
# define SPT_PADCHAR ' '
# endif
# ifndef SPT_BUFSIZE
# define SPT_BUFSIZE MAXLINE
# endif
#endif /* SPT_TYPE != SPT_NONE && SPT_TYPE != SPT_BUILTIN */
#if SPT_TYPE != SPT_BUILTIN
/*VARARGS1*/
void
setproctitle(const char *fmt, ...)
{
# if SPT_TYPE != SPT_NONE
register char *p;
register int i;
SETPROC_STATIC char buf[SPT_BUFSIZE];
VA_LOCAL_DECL
# if SPT_TYPE == SPT_PSTAT
union pstun pst;
# endif
# if SPT_TYPE == SPT_SCO
off_t seek_off;
static int kmem = -1;
static int kmempid = -1;
struct user u;
# endif
# if SPT_TYPE == SPT_REUSEARGV
extern char **Argv;
extern char *LastArgv;
# endif
if (!setproctitle_enable) return;
p = buf;
/* print the argument string */
VA_START(fmt);
(void) vsprintf(p, fmt, ap);
VA_END;
i = strlen(buf);
# if SPT_TYPE == SPT_PSTAT
pst.pst_command = buf;
pstat(PSTAT_SETCMD, pst, i, 0, 0);
# endif
# if SPT_TYPE == SPT_PSSTRINGS
PS_STRINGS->ps_nargvstr = 1;
PS_STRINGS->ps_argvstr = buf;
# endif
# if SPT_TYPE == SPT_SYSMIPS
sysmips(SONY_SYSNEWS, NEWS_SETPSARGS, buf);
# endif
# if SPT_TYPE == SPT_SCO
if (kmem < 0 || kmempid != getpid())
{
if (kmem >= 0)
close(kmem);
kmem = open(_PATH_KMEM, O_RDWR, 0);
if (kmem < 0)
return;
(void) fcntl(kmem, F_SETFD, 1);
kmempid = getpid();
}
buf[PSARGSZ - 1] = '\0';
seek_off = UVUBLK + (off_t) u.u_psargs - (off_t) &u;
if (lseek(kmem, (char *) seek_off, SEEK_SET) == seek_off)
(void) write(kmem, buf, PSARGSZ);
# endif
# if SPT_TYPE == SPT_REUSEARGV
if (i > LastArgv - Argv[0] - 2)
{
i = LastArgv - Argv[0] - 2;
buf[i] = '\0';
}
(void) strcpy(Argv[0], buf);
p = &Argv[0][i];
while (p < LastArgv)
*p++ = SPT_PADCHAR;
Argv[1] = NULL;
# endif
# endif /* SPT_TYPE != SPT_NONE */
}
#endif /* SPT_TYPE != SPT_BUILTIN */

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