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/* $Cambridge: hermes/src/prayer/lib/setproctitle.c,v 1.3 2008/09/16 09:59:57 dpc22 Exp $ */
/************************************************
* Prayer - a Webmail Interface *
************************************************/
/* Copyright (c) University of Cambridge 2000 - 2008 */
/* See the file NOTICE for conditions of use and distribution. */
/* Setproctitle is only supported on some architectures. Default: disable */
#include "lib.h"
/* Following code has been stolen from sendmail 8.9.3: src/conf.[ch] */
/*
** 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>
# 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 || 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
# define SPT_PADCHAR ' '
# endif
#endif /* SPT_TYPE != SPT_NONE && SPT_TYPE != SPT_BUILTIN */
# ifndef SPT_BUFSIZE
# define SPT_BUFSIZE MAXLINE
# endif
/*
** Pointers for setproctitle.
** This allows "ps" listings to give more useful information.
*/
static char *progname = NULL;
static char **Argv = NULL; /* pointer to argument vector */
static char *LastArgv = NULL; /* end of argv */
void initsetproctitle(const char *name, int argc, char **argv, char **envp)
{
register int i, envpsize = 0;
extern char **environ;
char *s;
if ((s = strrchr(name, '/')))
progname = strdup(s + 1);
else
progname = strdup(name);
/*
** 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));
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;
}
for (i = 0; envp[i] != NULL; i++) {
if (LastArgv + 1 == envp[i])
LastArgv = envp[i] + strlen(envp[i]);
else
continue;
}
}
#if SPT_TYPE != SPT_BUILTIN
/*VARARGS1*/
void
# ifdef __STDC__
setproctitle(const char *fmt, ...)
# else
setproctitle(fmt, va_alist)
const char *fmt;
va_dcl
# endif
{
# 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
p = buf;
/* print heading for grep */
(void) strcpy(p, progname);
p += strlen(p);
*p++ = ':';
*p++ = ' ';
/* print the argument string */
VA_START(fmt);
(void) vsnprintf(p, SPACELEFT(buf, 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, (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 */
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