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/* This file is part of GNU Pies.
Copyright (C) 2008-2010, 2013, 2016 Sergey Poznyakoff
GNU Pies is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Pies is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Pies. If not, see <http://www.gnu.org/licenses/>. */
#include <pies.h>
#define SET_LIMIT_AS 0x0001
#define SET_LIMIT_CPU 0x0002
#define SET_LIMIT_DATA 0x0004
#define SET_LIMIT_FSIZE 0x0008
#define SET_LIMIT_NPROC 0x0010
#define SET_LIMIT_CORE 0x0020
#define SET_LIMIT_MEMLOCK 0x0040
#define SET_LIMIT_NOFILE 0x0080
#define SET_LIMIT_RSS 0x0100
#define SET_LIMIT_STACK 0x0200
#define SET_LIMIT_LOGINS 0x0400
#define SET_LIMIT_PRIO 0x0800
struct limits_rec
{
unsigned set;
rlim_t limit_as;
rlim_t limit_cpu;
rlim_t limit_data;
rlim_t limit_fsize;
rlim_t limit_nproc;
rlim_t limit_core;
rlim_t limit_memlock;
rlim_t limit_nofile;
rlim_t limit_rss;
rlim_t limit_stack;
int limit_logins;
int limit_prio;
};
int
do_set_limit (int rlimit, rlim_t limit)
{
struct rlimit rlim;
debug (1, ("setting limit %d to %lu", rlimit, (unsigned long) limit));
rlim.rlim_cur = limit;
rlim.rlim_max = limit;
if (setrlimit(rlimit, &rlim))
{
//FIXME: arg?
logfuncall ("setrlimit", NULL, errno);
return 1;
}
return 0;
}
static int
set_prio (int prio)
{
debug (2, ("Setting priority to %d", prio));
if (setpriority (PRIO_PROCESS, 0, prio))
{
logfuncall ("setpriority", NULL, errno);
return 1;
}
return 0;
}
/* Counts the number of user logins and check against the limit */
static int
check_logins (const char *name, int limit)
{
logmsg (LOG_NOTICE, _("L limit is not implemented"));
return 0;
}
int
set_limits (const char *name, struct limits_rec *lrec)
{
int rc = 0;
if (!lrec)
return 0;
debug (2, ("setting limits for %s", name));
#if defined(RLIMIT_AS)
if (lrec->set & SET_LIMIT_AS)
rc |= do_set_limit(RLIMIT_AS, lrec->limit_as);
#endif
#if defined(RLIMIT_CPU)
if (lrec->set & SET_LIMIT_CPU)
rc |= do_set_limit(RLIMIT_CPU, lrec->limit_cpu);
#endif
#if defined(RLIMIT_DATA)
if (lrec->set & SET_LIMIT_DATA)
rc |= do_set_limit(RLIMIT_DATA, lrec->limit_data);
#endif
#if defined(RLIMIT_FSIZE)
if (lrec->set & SET_LIMIT_FSIZE)
rc |= do_set_limit(RLIMIT_FSIZE, lrec->limit_fsize);
#endif
#if defined(RLIMIT_NPROC)
if (lrec->set & SET_LIMIT_NPROC)
rc |= do_set_limit(RLIMIT_NPROC, lrec->limit_nproc);
#endif
#if defined(RLIMIT_CORE)
if (lrec->set & SET_LIMIT_CORE)
rc |= do_set_limit(RLIMIT_CORE, lrec->limit_core);
#endif
#if defined(RLIMIT_MEMLOCK)
if (lrec->set & SET_LIMIT_MEMLOCK)
rc |= do_set_limit(RLIMIT_MEMLOCK, lrec->limit_memlock);
#endif
#if defined(RLIMIT_NOFILE)
if (lrec->set & SET_LIMIT_NOFILE)
rc |= do_set_limit(RLIMIT_NOFILE, lrec->limit_nofile);
#endif
#if defined(RLIMIT_RSS)
if (lrec->set & SET_LIMIT_RSS)
rc |= do_set_limit(RLIMIT_RSS, lrec->limit_rss);
#endif
#if defined(RLIMIT_STACK)
if (lrec->set & SET_LIMIT_STACK)
rc |= do_set_limit(RLIMIT_STACK, lrec->limit_stack);
#endif
if (lrec->set & SET_LIMIT_LOGINS)
rc |= check_logins(name, lrec->limit_logins);
if (lrec->set & SET_LIMIT_PRIO)
rc |= set_prio(lrec->limit_logins);
return rc;
}
int
getlimit (char **ptr, rlim_t *rlim, int mul)
{
if (**ptr == '-')
{
*rlim = RLIM_INFINITY;
++*ptr;
}
else
{
unsigned long val;
val = strtoul (*ptr, ptr, 10);
if (val == 0)
return 1;
*rlim = val * mul;
}
return 0;
}
/* Parse limits string and fill appropriate fields in lrec.
The string consists of _commands_, optionally separated by any amount
of whitespace. A command has the following form:
[AaCcDdFfMmNnRrSsTtUuLlPp](-|[0-9]+)
i.e. a letter followed by number or a dash. The latters stands for
'unlimited'. Commands are interpreted as follows:
Command ulimit setrlimit() The limit it sets
option arg
-------------------------------------------------------------
[Aa] a RLIMIT_AS max address space (KB)
[Cc] c RLIMIT_CORE max core file size (KB)
[Dd] d RLIMIT_DATA max data size (KB)
[Ff] f RLIMIT_FSIZE Maximum filesize (KB)
[Mm] m RLIMIT_MEMLOCK max locked-in-memory address
space (KB)
[Nn] n RLIMIT_NOFILE max number of open files
[Rr] r RLIMIT_RSS max resident set size (KB)
[Ss] s RLIMIT_STACK max stack size (KB)
[Tt] t RLIMIT_CPU max CPU time (MIN)
[Uu] u RLIMIT_NPROC max number of processes
[Ll] l (none) max number of logins (N/A)
[Pp] p (none) process priority -20..20
(negative = high priority)
*/
int
parse_limits (limits_record_t *plrec, char *str, char **endp)
{
int c;
struct limits_rec *lrec = grecs_malloc (sizeof (*lrec));
*plrec = lrec;
lrec->set = 0;
while ((c = *str++))
{
if (c == ' ' || c == '\t')
continue;
switch (c)
{
case 'a':
case 'A':
/* RLIMIT_AS - max address space (KB) */
if (!getlimit (&str, &lrec->limit_as, 1024))
lrec->set |= SET_LIMIT_AS;
break;
case 't':
case 'T':
/* RLIMIT_CPU - max CPU time (MIN) */
if (!getlimit (&str, &lrec->limit_cpu, 60))
lrec->set |= SET_LIMIT_CPU;
break;
case 'd':
case 'D':
/* RLIMIT_DATA - max data size (KB) */
if (!getlimit (&str, &lrec->limit_data, 1024))
lrec->set |= SET_LIMIT_DATA;
break;
case 'f':
case 'F':
/* RLIMIT_FSIZE - Maximum filesize (KB) */
if (!getlimit (&str, &lrec->limit_fsize, 1024))
lrec->set |= SET_LIMIT_FSIZE;
break;
case 'u':
case 'U':
/* RLIMIT_NPROC - max number of processes */
if (!getlimit (&str, &lrec->limit_nproc, 1))
lrec->set |= SET_LIMIT_NPROC;
break;
case 'c':
case 'C':
/* RLIMIT_CORE - max core file size (KB) */
if (!getlimit (&str, &lrec->limit_core, 1024))
lrec->set |= SET_LIMIT_CORE;
break;
case 'm':
case 'M':
/* RLIMIT_MEMLOCK - max locked-in-memory
* address space (KB)
*/
if (!getlimit (&str, &lrec->limit_memlock, 1024))
lrec->set |= SET_LIMIT_MEMLOCK;
break;
case 'n':
case 'N':
/* RLIMIT_NOFILE - max number of open files */
if (!getlimit (&str, &lrec->limit_nofile, 1))
lrec->set |= SET_LIMIT_NOFILE;
break;
case 'r':
case 'R':
/* RLIMIT_RSS - max resident set size (KB) */
if (!getlimit (&str, &lrec->limit_rss, 1024))
lrec->set |= SET_LIMIT_RSS;
break;
case 's':
case 'S':
/* RLIMIT_STACK - max stack size (KB) */
if (!getlimit (&str, &lrec->limit_stack, 1024))
lrec->set |= SET_LIMIT_STACK;
break;
case 'l':
case 'L':
lrec->limit_logins = strtol (str, &str, 10);
if (lrec->limit_logins >= 0)
lrec->set |= SET_LIMIT_LOGINS;
break;
case 'p':
case 'P':
lrec->limit_prio = strtol (str, &str, 10);
if (lrec->limit_prio > 0)
lrec->set |= SET_LIMIT_PRIO;
break;
default:
*endp = str-1;
return 1;
}
}
return 0;
}
void
free_limits (limits_record_t rec)
{
if (rec)
free (rec);
}
int
limits_cmp (limits_record_t a, limits_record_t b)
{
if (!a)
return !!b;
else if (!b)
return 1;
return memcmp (a, b, sizeof (*a));
}
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