setproctitle.cpp
/*
* Copyright (c) 1998 Sendmail, Inc. All rights reserved.
* Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved.
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
* A copy of the above mentioned LICENSE file can be found in
* LICENSE.setproctitle.
*
* Ported for use with KDE by Waldo Bastian <bastian@kde.org>
*/
#include "setproctitle.h"
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/* _GNU_SOURCE might already be defined in <config.h> */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <stdio.h>
#include <stdarg.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* _PATH_KMEM should be defined in <paths.h> */
#ifndef _PATH_KMEM
# define _PATH_KMEM "/dev/kmem"
#endif
#define SPACELEFT(buf, ptr) (sizeof buf - ((ptr) - buf))
/*
** 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 */
#define SPT_CHANGEARGV 7 /* write our own strings into argv[] */
#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>
# ifdef HAVE_SYS_EXEC_H
# include <sys/exec.h>
# endif
# 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 || SPT_TYPE == SPT_CHANGEARGV
# 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
# ifdef _AIX
# define SPT_PADCHAR '\0'
# else
# define SPT_PADCHAR ' '
# endif
# endif
#endif /* SPT_TYPE != SPT_NONE && SPT_TYPE != SPT_BUILTIN */
# ifndef SPT_BUFSIZE
# define SPT_BUFSIZE 2048
# endif
/*
** Pointers for setproctitle.
** This allows "ps" listings to give more useful information.
*/
char **Argv = NULL; /* pointer to argument vector */
char *LastArgv = NULL; /* end of argv */
void
kdeinit_initsetproctitle(int argc, char **argv, char **envp)
{
register int i, envpsize = 0;
#if !defined(HAVE_NSGETENVIRON) || !defined(HAVE_CRT_EXTERNS_H)
extern char **environ;
#endif
/*
** Move the environment so setproctitle can use the space at
** the top of memory.
*/
for (i = 0; envp[i] != NULL; i++)
envpsize += strlen(envp[i]) + 1;
environ = (char **) malloc(sizeof (char *) * (i + 1));
if (environ == NULL)
return;
for (i = 0; envp[i] != NULL; i++)
environ[i] = strdup(envp[i]);
environ[i] = NULL;
/*
** Save start and extent of argv for setproctitle.
*/
Argv = argv;
/*
** Determine how much space we can use for setproctitle.
** Use all contiguous argv and envp pointers starting at argv[0]
*/
for (i = 0; i < argc; i++)
{
if (i==0 || LastArgv + 1 == argv[i])
LastArgv = argv[i] + strlen(argv[i]);
else
continue;
}
/*
* On linux, we don't want to reuse the memory allocated for
* the environment, as there are tools that try to read our environment
* variables while we're running (ConsoleKit does that).
* There is no way to move or resize it, so just not touchint it
* seems to be the only option
*/
#ifndef __linux__
for (i=0; envp[i] != NULL; i++)
{
if (LastArgv + 1 == envp[i])
LastArgv = envp[i] + strlen(envp[i]);
else
continue;
}
#endif
}
#if SPT_TYPE != SPT_BUILTIN
/*VARARGS1*/
static void
setproctitle(const char *fmt, ...)
{
# if SPT_TYPE != SPT_NONE
register char *p;
register int i;
SETPROC_STATIC char buf[SPT_BUFSIZE];
va_list ap;
# if SPT_TYPE == SPT_PSTAT
union pstun pst;
# endif
# if SPT_TYPE == SPT_SCO
off_t seek_off;
static int kmem = -1;
#warning (rikkus) kmempid is declared as int, should be long
static int kmempid = -1;
struct user u;
# endif
p = buf;
/* print the argument string */
va_start(ap, fmt);
(void) vsnprintf(p, SPACELEFT(buf, p), fmt, ap);
va_end(ap);
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, (off_t) 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
# if SPT_TYPE == SPT_CHANGEARGV
Argv[0] = buf;
Argv[1] = 0;
# endif
# endif /* SPT_TYPE != SPT_NONE */
}
#endif /* SPT_TYPE != SPT_BUILTIN */
/*
** SM_SETPROCTITLE -- set process task and set process title for ps
**
** Possibly set process status and call setproctitle() to
** change the ps display.
**
** Parameters:
** status -- whether or not to store as process status
** fmt -- a printf style format string.
** a, b, c -- possible parameters to fmt.
**
** Returns:
** none.
*/
/*VARARGS2*/
void
kdeinit_setproctitle(const char *fmt, ...)
{
char buf[SPT_BUFSIZE];
va_list ap;
/* print the argument string */
va_start(ap, fmt);
(void) vsnprintf(buf, SPT_BUFSIZE, fmt, ap);
va_end(ap);
setproctitle("%s", buf);
}

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