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Length: 2911 (0xb5f)
Types: TextFile
Names: »ulimit.c«
└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
└─⟦this⟧ »EUUGD11/euug-87hel/sec1/sh.ulimit/ulimit.c«
#ifndef lint
static char RCSid[] = "$Header: ulimit.c,v 1.4 85/12/09 13:02:22 arnold Exp $";
#endif
/*
* $Log: ulimit.c,v $
* Revision 1.4 85/12/09 13:02:22 arnold
* changed the declaration of limit to keep lint happy
*
* Revision 1.3 85/12/03 16:18:42 arnold
* Fixed original code to use symbolic constants from the header files
* Added many more commands for use with the ksh style ulimit command,
* for the BSD limits.
*
* Revision 1.2 85/11/18 10:04:46 arnold
* Updated from bare S5R2 to my first release
*
* Revision 1.1 85/11/15 12:19:05 arnold
* Initial revision
*
*
*/
/*
ulimit -- system call emulation for Bourne shell on 4.2BSD
last edit: 22-Aug-1983 D A Gwyn
*/
#include <sys/time.h>
#include <sys/resource.h>
#include <errno.h>
extern int getrlimit(), setrlimit();
extern int errno;
#define BLOCK 512L /* all these things are done in "blocks" */
long
ulimit (cmd, newlimit)
int cmd; /* subcommand */
long newlimit; /* desired new limit */
{
struct rlimit limit; /* data being gotten/set */
switch (cmd) {
case 1: /* get file size limit */
if (getrlimit (RLIMIT_FSIZE, &limit) != 0 )
return -1L; /* errno is already set */
return limit.rlim_max / BLOCK;
case 2: /* set file size limit */
limit.rlim_cur = limit.rlim_max = newlimit * BLOCK;
return setrlimit (RLIMIT_FSIZE, &limit);
case 3: /* get maximum break value */
if (getrlimit (RLIMIT_DATA, &limit) != 0)
return -1L; /* errno is already set */
return limit.rlim_max;
case 6: /* get core file size limit */
if (getrlimit (RLIMIT_CORE, &limit) != 0)
return -1L; /* errno already set */
return limit.rlim_max / BLOCK;
case 7: /* set core file size limit */
limit.rlim_cur = limit.rlim_max = newlimit * BLOCK;
return setrlimit (RLIMIT_CORE, &limit);
case 8: /* get data segment size limit */
if (getrlimit (RLIMIT_DATA, &limit) != 0)
return -1L; /* errno already set */
return limit.rlim_max / BLOCK;
case 9: /* set data segment size limit */
limit.rlim_cur = limit.rlim_max = newlimit * BLOCK;
return setrlimit (RLIMIT_DATA, &limit);
case 10: /* get physical memory limit */
if (getrlimit (RLIMIT_RSS, &limit) != 0)
return -1L; /* errno already set */
return limit.rlim_max / BLOCK;
case 11: /* set physical memory limit */
limit.rlim_cur = newlimit * BLOCK;
return setrlimit (RLIMIT_RSS, &limit);
case 12: /* get cpu time limit */
if (getrlimit (RLIMIT_CPU, &limit) != 0)
return -1L; /* errno already set */
return limit.rlim_max / 1000L; /* system uses milliseconds */
case 13: /* set cpu time limit */
limit.rlim_cur = limit.rlim_max = newlimit * 1000L;
return setrlimit (RLIMIT_CPU, &limit);
case 4:
case 5:
/* These two are for getting and setting the pipe */
/* size under UNIX/RT -- not applicable here */
/* so fall thru and complain */
default:
errno = EINVAL;
return -1L;
}
}