286 lines
7.0 KiB
C
286 lines
7.0 KiB
C
/* $NetBSD: c_ulimit.c,v 1.10 2012/06/09 02:51:50 christos Exp $ */
|
|
|
|
/*
|
|
ulimit -- handle "ulimit" builtin
|
|
|
|
Reworked to use getrusage() and ulimit() at once (as needed on
|
|
some schizophrenic systems, eg, HP-UX 9.01), made argument parsing
|
|
conform to at&t ksh, added autoconf support. Michael Rendell, May, '94
|
|
|
|
Eric Gisin, September 1988
|
|
Adapted to PD KornShell. Removed AT&T code.
|
|
|
|
last edit: 06-Jun-1987 D A Gwyn
|
|
|
|
This started out as the BRL UNIX System V system call emulation
|
|
for 4.nBSD, and was later extended by Doug Kingston to handle
|
|
the extended 4.nBSD resource limits. It now includes the code
|
|
that was originally under case SYSULIMIT in source file "xec.c".
|
|
*/
|
|
#include <sys/cdefs.h>
|
|
|
|
#ifndef lint
|
|
__RCSID("$NetBSD: c_ulimit.c,v 1.10 2012/06/09 02:51:50 christos Exp $");
|
|
#endif
|
|
|
|
|
|
#include "sh.h"
|
|
#include "ksh_time.h"
|
|
#ifdef HAVE_SYS_RESOURCE_H
|
|
# include <sys/resource.h>
|
|
#endif /* HAVE_SYS_RESOURCE_H */
|
|
#ifdef HAVE_ULIMIT_H
|
|
# include <ulimit.h>
|
|
#else /* HAVE_ULIMIT_H */
|
|
# ifdef HAVE_ULIMIT
|
|
extern long ulimit();
|
|
# endif /* HAVE_ULIMIT */
|
|
#endif /* HAVE_ULIMIT_H */
|
|
|
|
#define SOFT 0x1
|
|
#define HARD 0x2
|
|
|
|
#ifdef RLIM_INFINITY
|
|
# define KSH_RLIM_INFINITY RLIM_INFINITY
|
|
#else
|
|
# define KSH_RLIM_INFINITY ((rlim_t) 1 << (sizeof(rlim_t) * 8 - 1) - 1)
|
|
#endif /* RLIM_INFINITY */
|
|
|
|
int
|
|
c_ulimit(wp)
|
|
char **wp;
|
|
{
|
|
static const struct limits {
|
|
const char *name;
|
|
enum { RLIMIT, ULIMIT } which;
|
|
int gcmd; /* get command */
|
|
int scmd; /* set command (or -1, if no set command) */
|
|
int factor; /* multiply by to get rlim_{cur,max} values */
|
|
char option;
|
|
} limits[] = {
|
|
/* Do not use options -H, -S or -a */
|
|
#ifdef RLIMIT_CPU
|
|
{ "time(cpu-seconds)", RLIMIT, RLIMIT_CPU, RLIMIT_CPU, 1, 't' },
|
|
#endif
|
|
#ifdef RLIMIT_FSIZE
|
|
{ "file(blocks)", RLIMIT, RLIMIT_FSIZE, RLIMIT_FSIZE, 512, 'f' },
|
|
#else /* RLIMIT_FSIZE */
|
|
# ifdef UL_GETFSIZE /* x/open */
|
|
{ "file(blocks)", ULIMIT, UL_GETFSIZE, UL_SETFSIZE, 1, 'f' },
|
|
# else /* UL_GETFSIZE */
|
|
# ifdef UL_GFILLIM /* svr4/xenix */
|
|
{ "file(blocks)", ULIMIT, UL_GFILLIM, UL_SFILLIM, 1, 'f' },
|
|
# else /* UL_GFILLIM */
|
|
{ "file(blocks)", ULIMIT, 1, 2, 1, 'f' },
|
|
# endif /* UL_GFILLIM */
|
|
# endif /* UL_GETFSIZE */
|
|
#endif /* RLIMIT_FSIZE */
|
|
#ifdef RLIMIT_CORE
|
|
{ "coredump(blocks)", RLIMIT, RLIMIT_CORE, RLIMIT_CORE, 512, 'c' },
|
|
#endif
|
|
#ifdef RLIMIT_DATA
|
|
{ "data(kbytes)", RLIMIT, RLIMIT_DATA, RLIMIT_DATA, 1024, 'd' },
|
|
#endif
|
|
#ifdef RLIMIT_STACK
|
|
{ "stack(kbytes)", RLIMIT, RLIMIT_STACK, RLIMIT_STACK, 1024, 's' },
|
|
#endif
|
|
#ifdef RLIMIT_MEMLOCK
|
|
{ "lockedmem(kbytes)", RLIMIT, RLIMIT_MEMLOCK, RLIMIT_MEMLOCK, 1024, 'l' },
|
|
#endif
|
|
#ifdef RLIMIT_RSS
|
|
{ "memory(kbytes)", RLIMIT, RLIMIT_RSS, RLIMIT_RSS, 1024, 'm' },
|
|
#endif
|
|
#ifdef RLIMIT_NOFILE
|
|
{ "nofiles(descriptors)", RLIMIT, RLIMIT_NOFILE, RLIMIT_NOFILE, 1, 'n' },
|
|
#else /* RLIMIT_NOFILE */
|
|
# ifdef UL_GDESLIM /* svr4/xenix */
|
|
{ "nofiles(descriptors)", ULIMIT, UL_GDESLIM, -1, 1, 'n' },
|
|
# endif /* UL_GDESLIM */
|
|
#endif /* RLIMIT_NOFILE */
|
|
#ifdef RLIMIT_NPROC
|
|
{ "processes", RLIMIT, RLIMIT_NPROC, RLIMIT_NPROC, 1, 'p' },
|
|
#endif
|
|
#ifdef RLIMIT_NTHR
|
|
{ "threads", RLIMIT, RLIMIT_NTHR, RLIMIT_NTHR, 1, 'r' },
|
|
#endif
|
|
#ifdef RLIMIT_VMEM
|
|
{ "vmemory(kbytes)", RLIMIT, RLIMIT_VMEM, RLIMIT_VMEM, 1024, 'v' },
|
|
#else /* RLIMIT_VMEM */
|
|
/* These are not quite right - really should subtract etext or something */
|
|
# ifdef UL_GMEMLIM /* svr4/xenix */
|
|
{ "vmemory(maxaddr)", ULIMIT, UL_GMEMLIM, -1, 1, 'v' },
|
|
# else /* UL_GMEMLIM */
|
|
# ifdef UL_GETBREAK /* osf/1 */
|
|
{ "vmemory(maxaddr)", ULIMIT, UL_GETBREAK, -1, 1, 'v' },
|
|
# else /* UL_GETBREAK */
|
|
# ifdef UL_GETMAXBRK /* hpux */
|
|
{ "vmemory(maxaddr)", ULIMIT, UL_GETMAXBRK, -1, 1, 'v' },
|
|
# endif /* UL_GETMAXBRK */
|
|
# endif /* UL_GETBREAK */
|
|
# endif /* UL_GMEMLIM */
|
|
#endif /* RLIMIT_VMEM */
|
|
#ifdef RLIMIT_SWAP
|
|
{ "swap(kbytes)", RLIMIT, RLIMIT_SWAP, RLIMIT_SWAP, 1024, 'w' },
|
|
#endif
|
|
#ifdef RLIMIT_SBSIZE
|
|
{ "sbsize(bytes)", RLIMIT, RLIMIT_SBSIZE, RLIMIT_SBSIZE, 1, 'b' },
|
|
#endif
|
|
{ .name = NULL }
|
|
};
|
|
static char options[3 + NELEM(limits)];
|
|
rlim_t UNINITIALIZED(val);
|
|
int how = SOFT | HARD;
|
|
const struct limits *l;
|
|
int set, all = 0;
|
|
int optc, what;
|
|
#ifdef HAVE_SETRLIMIT
|
|
struct rlimit limit;
|
|
#endif /* HAVE_SETRLIMIT */
|
|
|
|
if (!options[0]) {
|
|
/* build options string on first call - yuck */
|
|
char *p = options;
|
|
|
|
*p++ = 'H'; *p++ = 'S'; *p++ = 'a';
|
|
for (l = limits; l->name; l++)
|
|
*p++ = l->option;
|
|
*p = '\0';
|
|
}
|
|
what = 'f';
|
|
while ((optc = ksh_getopt(wp, &builtin_opt, options)) != EOF)
|
|
switch (optc) {
|
|
case 'H':
|
|
how = HARD;
|
|
break;
|
|
case 'S':
|
|
how = SOFT;
|
|
break;
|
|
case 'a':
|
|
all = 1;
|
|
break;
|
|
case '?':
|
|
return 1;
|
|
default:
|
|
what = optc;
|
|
}
|
|
|
|
for (l = limits; l->name && l->option != what; l++)
|
|
;
|
|
if (!l->name) {
|
|
internal_errorf(0, "ulimit: %c", what);
|
|
return 1;
|
|
}
|
|
|
|
wp += builtin_opt.optind;
|
|
set = *wp ? 1 : 0;
|
|
if (set) {
|
|
if (all || wp[1]) {
|
|
bi_errorf("too many arguments");
|
|
return 1;
|
|
}
|
|
if (strcmp(wp[0], "unlimited") == 0)
|
|
val = KSH_RLIM_INFINITY;
|
|
else {
|
|
long rval;
|
|
|
|
if (!evaluate(wp[0], &rval, KSH_RETURN_ERROR))
|
|
return 1;
|
|
/* Avoid problems caused by typos that
|
|
* evaluate misses due to evaluating unset
|
|
* parameters to 0...
|
|
* If this causes problems, will have to
|
|
* add parameter to evaluate() to control
|
|
* if unset params are 0 or an error.
|
|
*/
|
|
if (!rval && !digit(wp[0][0])) {
|
|
bi_errorf("invalid limit: %s", wp[0]);
|
|
return 1;
|
|
}
|
|
val = (u_long)rval * l->factor;
|
|
}
|
|
}
|
|
if (all) {
|
|
for (l = limits; l->name; l++) {
|
|
#ifdef HAVE_SETRLIMIT
|
|
if (l->which == RLIMIT) {
|
|
getrlimit(l->gcmd, &limit);
|
|
if (how & SOFT)
|
|
val = limit.rlim_cur;
|
|
else if (how & HARD)
|
|
val = limit.rlim_max;
|
|
} else
|
|
#endif /* HAVE_SETRLIMIT */
|
|
#ifdef HAVE_ULIMIT
|
|
{
|
|
val = ulimit(l->gcmd, (rlim_t) 0);
|
|
}
|
|
#else /* HAVE_ULIMIT */
|
|
;
|
|
#endif /* HAVE_ULIMIT */
|
|
shprintf("%-20s ", l->name);
|
|
#ifdef RLIM_INFINITY
|
|
if (val == RLIM_INFINITY)
|
|
shprintf("unlimited\n");
|
|
else
|
|
#endif /* RLIM_INFINITY */
|
|
{
|
|
val /= l->factor;
|
|
shprintf("%ld\n", (long) val);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
#ifdef HAVE_SETRLIMIT
|
|
if (l->which == RLIMIT) {
|
|
getrlimit(l->gcmd, &limit);
|
|
if (set) {
|
|
if (how & SOFT)
|
|
limit.rlim_cur = val;
|
|
if (how & HARD)
|
|
limit.rlim_max = val;
|
|
if (setrlimit(l->scmd, &limit) < 0) {
|
|
if (errno == EPERM)
|
|
bi_errorf("exceeds allowable limit");
|
|
else
|
|
bi_errorf("bad limit: %s",
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
} else {
|
|
if (how & SOFT)
|
|
val = limit.rlim_cur;
|
|
else if (how & HARD)
|
|
val = limit.rlim_max;
|
|
}
|
|
} else
|
|
#endif /* HAVE_SETRLIMIT */
|
|
#ifdef HAVE_ULIMIT
|
|
{
|
|
if (set) {
|
|
if (l->scmd == -1) {
|
|
bi_errorf("can't change limit");
|
|
return 1;
|
|
} else if (ulimit(l->scmd, val) < 0) {
|
|
bi_errorf("bad limit: %s", strerror(errno));
|
|
return 1;
|
|
}
|
|
} else
|
|
val = ulimit(l->gcmd, (rlim_t) 0);
|
|
}
|
|
#else /* HAVE_ULIMIT */
|
|
;
|
|
#endif /* HAVE_ULIMIT */
|
|
if (!set) {
|
|
#ifdef RLIM_INFINITY
|
|
if (val == RLIM_INFINITY)
|
|
shprintf("unlimited\n");
|
|
else
|
|
#endif /* RLIM_INFINITY */
|
|
{
|
|
val /= l->factor;
|
|
shprintf("%ld\n", (long) val);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|