This file is ulimit.def, from which is created ulimit.c.
It implements the builtin "ulimit" in Bash.
-Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
+Copyright (C) 1987-2015 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
-Bash 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 1, or (at your option) any later
-version.
+Bash 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 of the License, or
+(at your option) any later version.
-Bash 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.
+Bash 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 Bash; see the file COPYING. If not, write to the Free Software
-Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+You should have received a copy of the GNU General Public License
+along with Bash. If not, see <http://www.gnu.org/licenses/>.
$PRODUCES ulimit.c
$BUILTIN ulimit
$FUNCTION ulimit_builtin
-$DEPENDS_ON !MINIX
-$SHORT_DOC ulimit [-SHacdfmstpnuv [limit]]
-Ulimit provides control over the resources available to processes
-started by the shell, on systems that allow such control. If an
-option is given, it is interpreted as follows:
-
- -S use the `soft' resource limit
- -H use the `hard' resource limit
- -a all current limits are reported
- -c the maximum size of core files created
- -d the maximum size of a process's data segment
- -m the maximum resident set size
- -s the maximum stack size
- -t the maximum amount of cpu time in seconds
- -f the maximum size of files created by the shell
- -p the pipe buffer size
- -n the maximum number of open file descriptors
- -u the maximum number of user processes
- -v the size of virtual memory
-
-If LIMIT is given, it is the new value of the specified resource.
-Otherwise, the current value of the specified resource is printed.
-If no option is given, then -f is assumed. Values are in 1k
-increments, except for -t, which is in seconds, -p, which is in
-increments of 512 bytes, and -u, which is an unscaled number of
-processes.
+$DEPENDS_ON !_MINIX
+$SHORT_DOC ulimit [-SHabcdefiklmnpqrstuvxPT] [limit]
+Modify shell resource limits.
+
+Provides control over the resources available to the shell and processes
+it creates, on systems that allow such control.
+
+Options:
+ -S use the `soft' resource limit
+ -H use the `hard' resource limit
+ -a all current limits are reported
+ -b the socket buffer size
+ -c the maximum size of core files created
+ -d the maximum size of a process's data segment
+ -e the maximum scheduling priority (`nice')
+ -f the maximum size of files written by the shell and its children
+ -i the maximum number of pending signals
+ -k the maximum number of kqueues allocated for this process
+ -l the maximum size a process may lock into memory
+ -m the maximum resident set size
+ -n the maximum number of open file descriptors
+ -p the pipe buffer size
+ -q the maximum number of bytes in POSIX message queues
+ -r the maximum real-time scheduling priority
+ -s the maximum stack size
+ -t the maximum amount of cpu time in seconds
+ -u the maximum number of user processes
+ -v the size of virtual memory
+ -x the maximum number of file locks
+ -P the maximum number of pseudoterminals
+ -T the maximum number of threads
+
+Not all options are available on all platforms.
+
+If LIMIT is given, it is the new value of the specified resource; the
+special LIMIT values `soft', `hard', and `unlimited' stand for the
+current soft limit, the current hard limit, and no limit, respectively.
+Otherwise, the current value of the specified resource is printed. If
+no option is given, then -f is assumed.
+
+Values are in 1024-byte increments, except for -t, which is in seconds,
+-p, which is in increments of 512 bytes, and -u, which is an unscaled
+number of processes.
+
+Exit Status:
+Returns success unless an invalid option is supplied or an error occurs.
$END
+#if !defined (_MINIX)
+
+#include <config.h>
+
+#include "../bashtypes.h"
+#if defined (HAVE_SYS_PARAM_H)
+# include <sys/param.h>
+#endif
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
#include <stdio.h>
-#include <sys/types.h>
-#include <sys/param.h>
#include <errno.h>
+
+#include "../bashintl.h"
+
#include "../shell.h"
+#include "common.h"
+#include "bashgetopt.h"
#include "pipesize.h"
#if !defined (errno)
extern int errno;
#endif
+/* For some reason, HPUX chose to make these definitions visible only if
+ _KERNEL is defined, so we define _KERNEL before including <sys/resource.h>
+ and #undef it afterward. */
#if defined (HAVE_RESOURCE)
# include <sys/time.h>
+# if defined (HPUX) && defined (RLIMIT_NEEDS_KERNEL)
+# define _KERNEL
+# endif
# include <sys/resource.h>
-#else
+# if defined (HPUX) && defined (RLIMIT_NEEDS_KERNEL)
+# undef _KERNEL
+# endif
+#elif defined (HAVE_SYS_TIMES_H)
# include <sys/times.h>
#endif
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
#if defined (HAVE_LIMITS_H)
# include <limits.h>
#endif
/* Check for the most basic symbols. If they aren't present, this
system's <sys/resource.h> isn't very useful to us. */
-#if !defined (RLIMIT_FSIZE) || defined (GETRLIMIT_MISSING)
+#if !defined (RLIMIT_FSIZE) || !defined (HAVE_GETRLIMIT)
# undef HAVE_RESOURCE
#endif
+#if !defined (HAVE_RESOURCE) && defined (HAVE_ULIMIT_H)
+# include <ulimit.h>
+#endif
+
#if !defined (RLIMTYPE)
# define RLIMTYPE long
-# define string_to_rlimtype string_to_long
+# define string_to_rlimtype(s) strtol(s, (char **)NULL, 10)
# define print_rlimtype(num, nl) printf ("%ld%s", num, nl ? "\n" : "")
#endif
-static void print_long ();
+/* Alternate names */
-/* **************************************************************** */
-/* */
-/* Ulimit builtin and Hacks. */
-/* */
-/* **************************************************************** */
+/* Some systems use RLIMIT_NOFILE, others use RLIMIT_OFILE */
+#if defined (HAVE_RESOURCE) && defined (RLIMIT_OFILE) && !defined (RLIMIT_NOFILE)
+# define RLIMIT_NOFILE RLIMIT_OFILE
+#endif /* HAVE_RESOURCE && RLIMIT_OFILE && !RLIMIT_NOFILE */
-/* Block size for ulimit operations. */
-#define ULIMIT_BLOCK_SIZE ((long)1024)
+#if defined (HAVE_RESOURCE) && defined (RLIMIT_POSIXLOCKS) && !defined (RLIMIT_LOCKS)
+# define RLIMIT_LOCKS RLIMIT_POSIXLOCKS
+#endif /* HAVE_RESOURCE && RLIMIT_POSIXLOCKS && !RLIMIT_LOCKS */
-#define u_FILE_SIZE 0x001
-#define u_MAX_BREAK_VAL 0x002
-#define u_PIPE_SIZE 0x004
-#define u_CORE_FILE_SIZE 0x008
-#define u_DATA_SEG_SIZE 0x010
-#define u_PHYS_MEM_SIZE 0x020
-#define u_CPU_TIME_LIMIT 0x040
-#define u_STACK_SIZE 0x080
-#define u_NUM_OPEN_FILES 0x100
-#define u_MAX_VIRTUAL_MEM 0x200
-#define u_MAX_USER_PROCS 0x400
+/* Some systems have these, some do not. */
+#ifdef RLIMIT_FSIZE
+# define RLIMIT_FILESIZE RLIMIT_FSIZE
+#else
+# define RLIMIT_FILESIZE 256
+#endif
+
+#define RLIMIT_PIPESIZE 257
+
+#ifdef RLIMIT_NOFILE
+# define RLIMIT_OPENFILES RLIMIT_NOFILE
+#else
+# define RLIMIT_OPENFILES 258
+#endif
-#define u_ALL_LIMITS 0x7ff
+#ifdef RLIMIT_VMEM
+# define RLIMIT_VIRTMEM RLIMIT_VMEM
+# define RLIMIT_VMBLKSZ 1024
+#else
+# ifdef RLIMIT_AS
+# define RLIMIT_VIRTMEM RLIMIT_AS
+# define RLIMIT_VMBLKSZ 1024
+# else
+# define RLIMIT_VIRTMEM 259
+# define RLIMIT_VMBLKSZ 1
+# endif
+#endif
+
+#ifdef RLIMIT_NPROC
+# define RLIMIT_MAXUPROC RLIMIT_NPROC
+#else
+# define RLIMIT_MAXUPROC 260
+#endif
+
+#if !defined (RLIMIT_PTHREAD) && defined (RLIMIT_NTHR)
+# define RLIMIT_PTHREAD RLIMIT_NTHR
+#endif
#if !defined (RLIM_INFINITY)
-# define RLIM_INFINITY 0x7fffffff
+# define RLIM_INFINITY 0x7fffffff
#endif
-/* Some systems use RLIMIT_NOFILE, others use RLIMIT_OFILE */
-#if defined (HAVE_RESOURCE) && defined (RLIMIT_OFILE) && !defined (RLIMIT_NOFILE)
-# define RLIMIT_NOFILE RLIMIT_OFILE
-#endif /* HAVE_RESOURCE && RLIMIT_OFILE && !RLIMIT_NOFILE */
+#if !defined (RLIM_SAVED_CUR)
+# define RLIM_SAVED_CUR RLIM_INFINITY
+#endif
+
+#if !defined (RLIM_SAVED_MAX)
+# define RLIM_SAVED_MAX RLIM_INFINITY
+#endif
#define LIMIT_HARD 0x01
#define LIMIT_SOFT 0x02
-static RLIMTYPE shell_ulimit ();
-static RLIMTYPE pipesize ();
-static RLIMTYPE open_files ();
+/* "Blocks" are defined as 512 bytes when in Posix mode and 1024 bytes
+ otherwise. */
+#define POSIXBLK -2
+
+#define BLOCKSIZE(x) (((x) == POSIXBLK) ? (posixly_correct ? 512 : 1024) : (x))
+
+extern int posixly_correct;
+
+static int _findlim __P((int));
+
+static int ulimit_internal __P((int, char *, int, int));
+
+static int get_limit __P((int, RLIMTYPE *, RLIMTYPE *));
+static int set_limit __P((int, RLIMTYPE, int));
+
+static void printone __P((int, RLIMTYPE, int));
+static void print_all_limits __P((int));
+
+static int set_all_limits __P((int, RLIMTYPE));
+
+static int filesize __P((RLIMTYPE *));
+static int pipesize __P((RLIMTYPE *));
+static int getmaxuprc __P((RLIMTYPE *));
+static int getmaxvm __P((RLIMTYPE *, RLIMTYPE *));
+
+typedef struct {
+ int option; /* The ulimit option for this limit. */
+ int parameter; /* Parameter to pass to get_limit (). */
+ int block_factor; /* Blocking factor for specific limit. */
+ const char * const description; /* Descriptive string to output. */
+ const char * const units; /* scale */
+} RESOURCE_LIMITS;
+static RESOURCE_LIMITS limits[] = {
+#ifdef RLIMIT_NPTS
+ { 'P', RLIMIT_NPTS, 1, "number of pseudoterminals", (char *)NULL },
+#endif
+#ifdef RLIMIT_PTHREAD
+ { 'T', RLIMIT_PTHREAD, 1, "number of threads", (char *)NULL },
+#endif
+#ifdef RLIMIT_SBSIZE
+ { 'b', RLIMIT_SBSIZE, 1, "socket buffer size", "bytes" },
+#endif
+#ifdef RLIMIT_CORE
+ { 'c', RLIMIT_CORE, POSIXBLK, "core file size", "blocks" },
+#endif
+#ifdef RLIMIT_DATA
+ { 'd', RLIMIT_DATA, 1024, "data seg size", "kbytes" },
+#endif
+#ifdef RLIMIT_NICE
+ { 'e', RLIMIT_NICE, 1, "scheduling priority", (char *)NULL },
+#endif
+ { 'f', RLIMIT_FILESIZE, POSIXBLK, "file size", "blocks" },
+#ifdef RLIMIT_SIGPENDING
+ { 'i', RLIMIT_SIGPENDING, 1, "pending signals", (char *)NULL },
+#endif
+#ifdef RLIMIT_KQUEUES
+ { 'k', RLIMIT_KQUEUES, 1, "max kqueues", (char *)NULL },
+#endif
+#ifdef RLIMIT_MEMLOCK
+ { 'l', RLIMIT_MEMLOCK, 1024, "max locked memory", "kbytes" },
+#endif
+#ifdef RLIMIT_RSS
+ { 'm', RLIMIT_RSS, 1024, "max memory size", "kbytes" },
+#endif /* RLIMIT_RSS */
+ { 'n', RLIMIT_OPENFILES, 1, "open files", (char *)NULL},
+ { 'p', RLIMIT_PIPESIZE, 512, "pipe size", "512 bytes" },
+#ifdef RLIMIT_MSGQUEUE
+ { 'q', RLIMIT_MSGQUEUE, 1, "POSIX message queues", "bytes" },
+#endif
+#ifdef RLIMIT_RTPRIO
+ { 'r', RLIMIT_RTPRIO, 1, "real-time priority", (char *)NULL },
+#endif
+#ifdef RLIMIT_STACK
+ { 's', RLIMIT_STACK, 1024, "stack size", "kbytes" },
+#endif
+#ifdef RLIMIT_CPU
+ { 't', RLIMIT_CPU, 1, "cpu time", "seconds" },
+#endif /* RLIMIT_CPU */
+ { 'u', RLIMIT_MAXUPROC, 1, "max user processes", (char *)NULL },
#if defined (HAVE_RESOURCE)
-static RLIMTYPE getmaxvm ();
-#endif /* HAVE_RESOURCE */
+ { 'v', RLIMIT_VIRTMEM, RLIMIT_VMBLKSZ, "virtual memory", "kbytes" },
+#endif
+#ifdef RLIMIT_SWAP
+ { 'w', RLIMIT_SWAP, 1024, "swap size", "kbytes" },
+#endif
+#ifdef RLIMIT_LOCKS
+ { 'x', RLIMIT_LOCKS, 1, "file locks", (char *)NULL },
+#endif
+ { -1, -1, -1, (char *)NULL, (char *)NULL }
+};
+#define NCMDS (sizeof(limits) / sizeof(limits[0]))
-static void print_specific_limits ();
-static void print_all_limits ();
+typedef struct _cmd {
+ int cmd;
+ char *arg;
+} ULCMD;
-static char t[2];
+static ULCMD *cmdlist;
+static int ncmd;
+static int cmdlistsz;
-/* Return 1 if the limit associated with CMD can be raised from CURRENT
- to NEW. This is for USG systems without HAVE_RESOURCE, most of which
- do not allow any user other than root to raise limits. There are,
- however, exceptions. */
-#if !defined (HAVE_RESOURCE)
-static int
-canraise (cmd, current, new)
+#if !defined (HAVE_RESOURCE) && !defined (HAVE_ULIMIT)
+long
+ulimit (cmd, newlim)
int cmd;
- RLIMTYPE current, new;
+ long newlim;
+{
+ errno = EINVAL;
+ return -1;
+}
+#endif /* !HAVE_RESOURCE && !HAVE_ULIMIT */
+
+static int
+_findlim (opt)
+ int opt;
{
-# if defined (HAVE_SETDTABLESIZE)
- if (cmd == u_NUM_OPEN_FILES)
- return (1);
-# endif /* HAVE_SETDTABLSIZE */
+ register int i;
- return ((current > new) || (current_user.uid == 0));
+ for (i = 0; limits[i].option > 0; i++)
+ if (limits[i].option == opt)
+ return i;
+ return -1;
}
-#endif /* !HAVE_RESOURCE */
-/* Report or set limits associated with certain per-process resources.
- See the help documentation in builtins.c for a full description.
+static char optstring[4 + 2 * NCMDS];
- Rewritten by Chet Ramey 6/30/91. */
+/* Report or set limits associated with certain per-process resources.
+ See the help documentation in builtins.c for a full description. */
int
ulimit_builtin (list)
register WORD_LIST *list;
{
register char *s;
- int c, setting, cmd, mode, verbose_print, opt_eof;
- int all_limits, specific_limits;
- long block_factor;
- RLIMTYPE current_limit, real_limit, limit;
+ int c, limind, mode, opt, all_limits;
- c = mode = verbose_print = opt_eof = 0;
- limit = (RLIMTYPE)-1;
+ mode = 0;
- do
- {
- cmd = setting = all_limits = specific_limits = 0;
- block_factor = ULIMIT_BLOCK_SIZE;
+ all_limits = 0;
- /* read_options: */
- if (list && !opt_eof && *list->word->word == '-')
+ /* Idea stolen from pdksh -- build option string the first time called. */
+ if (optstring[0] == 0)
+ {
+ s = optstring;
+ *s++ = 'a'; *s++ = 'S'; *s++ = 'H';
+ for (c = 0; limits[c].option > 0; c++)
{
- s = &(list->word->word[1]);
- list = list->next;
-
- while (*s && (c = *s++))
- {
- switch (c)
- {
-#define ADD_CMD(x) { if (cmd) specific_limits++; cmd |= (x); }
-
- case '-': /* ulimit -- */
- opt_eof++;
- break;
-
- case 'a':
- all_limits++;
- break;
-
- case 'f':
- ADD_CMD (u_FILE_SIZE);
- break;
-
-#if defined (HAVE_RESOURCE)
- /* -S and -H are modifiers, not real options. */
- case 'S':
- mode |= LIMIT_SOFT;
- break;
-
- case 'H':
- mode |= LIMIT_HARD;
- break;
-
- case 'c':
- ADD_CMD (u_CORE_FILE_SIZE);
- break;
-
- case 'd':
- ADD_CMD (u_DATA_SEG_SIZE);
- break;
-
-#if !defined (USGr4)
- case 'm':
- ADD_CMD (u_PHYS_MEM_SIZE);
- break;
-#endif /* USGr4 */
-
- case 't':
- ADD_CMD (u_CPU_TIME_LIMIT);
- block_factor = 1; /* seconds */
- break;
-
- case 's':
- ADD_CMD (u_STACK_SIZE);
- break;
-
- case 'v':
- ADD_CMD (u_MAX_VIRTUAL_MEM);
- block_factor = 1;
- break;
-
- case 'u':
- ADD_CMD (u_MAX_USER_PROCS);
- block_factor = 1;
- break;
-
-#endif /* HAVE_RESOURCE */
-
- case 'p':
- ADD_CMD (u_PIPE_SIZE);
- block_factor = 512;
- break;
-
- case 'n':
- ADD_CMD (u_NUM_OPEN_FILES);
- block_factor = 1;
- break;
-
- default: /* error_case: */
- t[0] = c;
- t[1] = '\0';
- bad_option (t);
-#if !defined (HAVE_RESOURCE)
- builtin_error("usage: ulimit [-afnp] [new limit]");
-#else
- builtin_error("usage: ulimit [-SHacmdstfnpuv] [new limit]");
-#endif
- return (EX_USAGE);
- }
- }
+ *s++ = limits[c].option;
+ *s++ = ';';
}
+ *s = '\0';
+ }
- if (all_limits)
- {
- print_all_limits (mode);
- return (EXECUTION_SUCCESS);
- }
-
- if (specific_limits)
- {
- print_specific_limits (cmd, mode);
- if (list)
- verbose_print++;
- continue;
- }
-
- if (cmd == 0)
- cmd = u_FILE_SIZE;
-
- /* If an argument was supplied for the command, then we want to
- set the limit. Note that `ulimit something' means a command
- of -f with argument `something'. */
- if (list)
- {
- if (opt_eof || (*list->word->word != '-'))
- {
- s = list->word->word;
- list = list->next;
-
- if (STREQ (s, "unlimited"))
- limit = RLIM_INFINITY;
- else if (all_digits (s))
- limit = string_to_rlimtype (s);
- else
- {
- builtin_error ("bad non-numeric arg `%s'", s);
- return (EXECUTION_FAILURE);
- }
- setting++;
- }
- else if (!opt_eof)
- verbose_print++;
- }
-
- if (limit == RLIM_INFINITY)
- block_factor = 1;
-
- real_limit = limit * block_factor;
+ /* Initialize the command list. */
+ if (cmdlistsz == 0)
+ cmdlist = (ULCMD *)xmalloc ((cmdlistsz = 16) * sizeof (ULCMD));
+ ncmd = 0;
- /* If more than one option is given, list each in a verbose format,
- the same that is used for -a. */
- if (!setting && verbose_print)
+ reset_internal_getopt ();
+ while ((opt = internal_getopt (list, optstring)) != -1)
+ {
+ switch (opt)
{
- print_specific_limits (cmd, mode);
- continue;
+ case 'a':
+ all_limits++;
+ break;
+
+ /* -S and -H are modifiers, not real options. */
+ case 'S':
+ mode |= LIMIT_SOFT;
+ break;
+
+ case 'H':
+ mode |= LIMIT_HARD;
+ break;
+
+ CASE_HELPOPT;
+ case '?':
+ builtin_usage ();
+ return (EX_USAGE);
+
+ default:
+ if (ncmd >= cmdlistsz)
+ cmdlist = (ULCMD *)xrealloc (cmdlist, (cmdlistsz *= 2) * sizeof (ULCMD));
+ cmdlist[ncmd].cmd = opt;
+ cmdlist[ncmd++].arg = list_optarg;
+ break;
}
+ }
+ list = loptend;
- current_limit = shell_ulimit (cmd, real_limit, 0, mode);
+ if (all_limits)
+ {
+#ifdef NOTYET
+ if (list) /* setting */
+ {
+ if (STREQ (list->word->word, "unlimited") == 0)
+ {
+ builtin_error (_("%s: invalid limit argument"), list->word->word);
+ return (EXECUTION_FAILURE);
+ }
+ return (set_all_limits (mode == 0 ? LIMIT_SOFT|LIMIT_HARD : mode, RLIM_INFINITY));
+ }
+#endif
+ print_all_limits (mode == 0 ? LIMIT_SOFT : mode);
+ return (sh_chkwrite (EXECUTION_SUCCESS));
+ }
- if (setting)
- {
-#if !defined (HAVE_RESOURCE)
- /* Most USG systems do not most allow limits to be raised by any
- user other than root. There are, however, exceptions. */
- if (canraise (cmd, current_limit, real_limit) == 0)
- {
- builtin_error ("cannot raise limit: %s", strerror (EPERM));
- return (EXECUTION_FAILURE);
- }
-#endif /* !HAVE_RESOURCE */
-
- if (shell_ulimit (cmd, real_limit, 1, mode) == (RLIMTYPE)-1)
- {
- builtin_error ("cannot raise limit: %s", strerror (errno));
- return (EXECUTION_FAILURE);
- }
-
- continue;
- }
- else
+ /* default is `ulimit -f' */
+ if (ncmd == 0)
+ {
+ cmdlist[ncmd].cmd = 'f';
+ /* `ulimit something' is same as `ulimit -f something' */
+ cmdlist[ncmd++].arg = list ? list->word->word : (char *)NULL;
+ if (list)
+ list = list->next;
+ }
+
+ /* verify each command in the list. */
+ for (c = 0; c < ncmd; c++)
+ {
+ limind = _findlim (cmdlist[c].cmd);
+ if (limind == -1)
{
- if (current_limit < 0)
- builtin_error ("cannot get limit: %s", strerror (errno));
- else if (current_limit != RLIM_INFINITY)
- print_rlimtype ((current_limit / block_factor), 1);
- else
- printf ("unlimited\n");
+ builtin_error (_("`%c': bad command"), cmdlist[c].cmd);
+ return (EX_USAGE);
}
}
- while (list);
+
+ for (c = 0; c < ncmd; c++)
+ if (ulimit_internal (cmdlist[c].cmd, cmdlist[c].arg, mode, ncmd > 1) == EXECUTION_FAILURE)
+ return (EXECUTION_FAILURE);
return (EXECUTION_SUCCESS);
}
-/* The ulimit that we call from within Bash.
-
- WHICH says which limit to twiddle; SETTING is non-zero if NEWLIM
- contains the desired new limit. Otherwise, the existing limit is
- returned. If mode & LIMIT_HARD, the hard limit is used; if
- mode & LIMIT_SOFT, the soft limit. Both may be set by specifying
- -H and -S; if both are specified, or if neither is specified, the
- soft limit will be returned.
-
- Systems without BSD resource limits can specify only u_FILE_SIZE.
- This includes most USG systems.
-
- Chet Ramey supplied the BSD resource limit code. */
-static RLIMTYPE
-shell_ulimit (which, newlim, setting, mode)
- int which, setting, mode;
- RLIMTYPE newlim;
+static int
+ulimit_internal (cmd, cmdarg, mode, multiple)
+ int cmd;
+ char *cmdarg;
+ int mode, multiple;
{
-#if defined (HAVE_RESOURCE)
- struct rlimit limit;
- int cmd;
+ int opt, limind, setting;
+ int block_factor;
+ RLIMTYPE soft_limit, hard_limit, real_limit, limit;
+ setting = cmdarg != 0;
+ limind = _findlim (cmd);
if (mode == 0)
- mode |= LIMIT_SOFT;
-#endif
-
- switch (which)
+ mode = setting ? (LIMIT_HARD|LIMIT_SOFT) : LIMIT_SOFT;
+ opt = get_limit (limind, &soft_limit, &hard_limit);
+ if (opt < 0)
{
-#if !defined (HAVE_RESOURCE)
-
- case u_FILE_SIZE:
- if (!setting)
- {
- /* ulimit () returns a number that is in 512 byte blocks, thus we
- must multiply it by 512 to get back to bytes. This is false
- only under HP/UX 6.x. */
- RLIMTYPE result;
-
- result = ulimit (1, 0L);
-
-# if defined (hpux) && !defined (_POSIX_VERSION)
- return (result);
-# else
- return (result * 512);
-# endif /* hpux 6.x */
- }
- else
- return (ulimit (2, newlim / 512L));
-
- break;
-
-#else /* defined (HAVE_RESOURCE) */
-
- case u_FILE_SIZE:
- cmd = RLIMIT_FSIZE;
- goto do_ulimit;
-
- case u_CORE_FILE_SIZE:
- cmd = RLIMIT_CORE;
- goto do_ulimit;
-
- case u_DATA_SEG_SIZE:
- cmd = RLIMIT_DATA;
- goto do_ulimit;
-
-#if !defined (USGr4)
- case u_PHYS_MEM_SIZE:
-# if defined (RLIMIT_RSS)
- cmd = RLIMIT_RSS;
-# else /* !RLIMIT_RSS */
- errno = EINVAL;
- return ((RLIMTYPE)-1);
-# endif /* !RLIMIT_RSS */
-
- goto do_ulimit;
-#endif /* USGr4 */
-
- case u_CPU_TIME_LIMIT:
-#if defined (RLIMIT_CPU)
- cmd = RLIMIT_CPU;
- goto do_ulimit;
-#else
- errno = EINVAL;
- return ((RLIMTYPE)-1);
-# endif /* !RLIMIT_CPU */
-
-
- case u_STACK_SIZE:
- cmd = RLIMIT_STACK;
-
- do_ulimit:
+ builtin_error (_("%s: cannot get limit: %s"), limits[limind].description,
+ strerror (errno));
+ return (EXECUTION_FAILURE);
+ }
- if (getrlimit (cmd, &limit) != 0)
- return ((RLIMTYPE)-1);
+ if (setting == 0) /* print the value of the specified limit */
+ {
+ printone (limind, (mode & LIMIT_SOFT) ? soft_limit : hard_limit, multiple);
+ return (EXECUTION_SUCCESS);
+ }
+
+ /* Setting the limit. */
+ if (STREQ (cmdarg, "hard"))
+ real_limit = hard_limit;
+ else if (STREQ (cmdarg, "soft"))
+ real_limit = soft_limit;
+ else if (STREQ (cmdarg, "unlimited"))
+ real_limit = RLIM_INFINITY;
+ else if (all_digits (cmdarg))
+ {
+ limit = string_to_rlimtype (cmdarg);
+ block_factor = BLOCKSIZE(limits[limind].block_factor);
+ real_limit = limit * block_factor;
- if (!setting)
- {
- if (mode & LIMIT_SOFT)
- return (limit.rlim_cur);
- else
- return (limit.rlim_max);
- }
- else
+ if ((real_limit / block_factor) != limit)
{
- if (mode & LIMIT_SOFT)
- {
- /* Non-root users are only allowed to raise a limit up to the
- hard limit, not to infinity. */
- if (current_user.euid != 0 && newlim == RLIM_INFINITY)
- limit.rlim_cur = limit.rlim_max;
- else
- limit.rlim_cur = newlim;
- }
- if (mode & LIMIT_HARD)
- limit.rlim_max = newlim;
-
- return (setrlimit (cmd, &limit));
+ sh_erange (cmdarg, _("limit"));
+ return (EXECUTION_FAILURE);
}
+ }
+ else
+ {
+ sh_invalidnum (cmdarg);
+ return (EXECUTION_FAILURE);
+ }
- break;
+ if (set_limit (limind, real_limit, mode) < 0)
+ {
+ builtin_error (_("%s: cannot modify limit: %s"), limits[limind].description,
+ strerror (errno));
+ return (EXECUTION_FAILURE);
+ }
-#endif /* HAVE_RESOURCE */
+ return (EXECUTION_SUCCESS);
+}
- /* You can't get or set the pipe size with getrlimit, so we have to
- cheat. */
- case u_PIPE_SIZE:
- if (setting)
- {
- errno = EINVAL;
- return ((RLIMTYPE)-1);
- }
- return (pipesize ());
+static int
+get_limit (ind, softlim, hardlim)
+ int ind;
+ RLIMTYPE *softlim, *hardlim;
+{
+ RLIMTYPE value;
+#if defined (HAVE_RESOURCE)
+ struct rlimit limit;
+#endif
- case u_NUM_OPEN_FILES:
- if (setting)
+ if (limits[ind].parameter >= 256)
+ {
+ switch (limits[ind].parameter)
{
-#if defined (HAVE_RESOURCE) && defined (RLIMIT_NOFILE)
- cmd = RLIMIT_NOFILE;
- goto do_ulimit;
-#else
-# if defined (HAVE_SETDTABLESIZE)
- return (setdtablesize (newlim));
-# else
+ case RLIMIT_FILESIZE:
+ if (filesize (&value) < 0)
+ return -1;
+ break;
+ case RLIMIT_PIPESIZE:
+ if (pipesize (&value) < 0)
+ return -1;
+ break;
+ case RLIMIT_OPENFILES:
+ value = (RLIMTYPE)getdtablesize ();
+ break;
+ case RLIMIT_VIRTMEM:
+ return (getmaxvm (softlim, hardlim));
+ case RLIMIT_MAXUPROC:
+ if (getmaxuprc (&value) < 0)
+ return -1;
+ break;
+ default:
errno = EINVAL;
- return ((RLIMTYPE)-1);
-# endif /* HAVE_SETDTABLESIZE */
-#endif /* !HAVE_RESOURCE || !RLIMIT_NOFILE */
+ return -1;
}
- else
- return (open_files (mode));
-
- case u_MAX_VIRTUAL_MEM:
- if (setting)
+ *softlim = *hardlim = value;
+ return (0);
+ }
+ else
+ {
+#if defined (HAVE_RESOURCE)
+ if (getrlimit (limits[ind].parameter, &limit) < 0)
+ return -1;
+ *softlim = limit.rlim_cur;
+ *hardlim = limit.rlim_max;
+# if defined (HPUX9)
+ if (limits[ind].parameter == RLIMIT_FILESIZE)
{
- errno = EINVAL;
- return ((RLIMTYPE)-1);
+ *softlim *= 512;
+ *hardlim *= 512; /* Ugh. */
}
else
- {
-#if defined (HAVE_RESOURCE)
- return (getmaxvm (mode));
-#else /* !HAVE_RESOURCE */
- errno = EINVAL;
- return ((RLIMTYPE)-1);
-#endif /* !HAVE_RESOURCE */
- }
-
- case u_MAX_USER_PROCS:
-#if defined (HAVE_RESOURCE) && defined (RLIMIT_NPROC)
- cmd = RLIMIT_NPROC;
- goto do_ulimit;
-#else /* !HAVE_RESOURCE || !RLIMIT_NPROC */
- errno = EINVAL;
- return ((RLIMTYPE)-1);
-#endif /* !HAVE_RESOURCE || !RLIMIT_NPROC */
-
- default:
+# endif /* HPUX9 */
+ return 0;
+#else
errno = EINVAL;
- return ((RLIMTYPE)-1);
+ return -1;
+#endif
}
}
-#if defined (HAVE_RESOURCE)
-static RLIMTYPE
-getmaxvm (mode)
+static int
+set_limit (ind, newlim, mode)
+ int ind;
+ RLIMTYPE newlim;
int mode;
{
- struct rlimit rl;
+#if defined (HAVE_RESOURCE)
+ struct rlimit limit;
+ RLIMTYPE val;
+#endif
-#if defined (RLIMIT_VMEM)
- if (getrlimit (RLIMIT_VMEM, &rl) < 0)
- return ((RLIMTYPE)-1);
- else
- return (((mode & LIMIT_SOFT) ? rl.rlim_cur : rl.rlim_max) / 1024L);
-#else /* !RLIMIT_VMEM */
- RLIMTYPE maxdata, maxstack;
+ if (limits[ind].parameter >= 256)
+ switch (limits[ind].parameter)
+ {
+ case RLIMIT_FILESIZE:
+#if !defined (HAVE_RESOURCE)
+ return (ulimit (2, newlim / 512L));
+#else
+ errno = EINVAL;
+ return -1;
+#endif
- if (getrlimit (RLIMIT_DATA, &rl) < 0)
- return ((RLIMTYPE)-1);
+ case RLIMIT_OPENFILES:
+#if defined (HAVE_SETDTABLESIZE)
+# if defined (__CYGWIN__)
+ /* Grrr... Cygwin declares setdtablesize as void. */
+ setdtablesize (newlim);
+ return 0;
+# else
+ return (setdtablesize (newlim));
+# endif
+#endif
+ case RLIMIT_PIPESIZE:
+ case RLIMIT_VIRTMEM:
+ case RLIMIT_MAXUPROC:
+ default:
+ errno = EINVAL;
+ return -1;
+ }
else
- maxdata = (mode & LIMIT_SOFT) ? rl.rlim_cur : rl.rlim_max;
+ {
+#if defined (HAVE_RESOURCE)
+ if (getrlimit (limits[ind].parameter, &limit) < 0)
+ return -1;
+# if defined (HPUX9)
+ if (limits[ind].parameter == RLIMIT_FILESIZE)
+ newlim /= 512; /* Ugh. */
+# endif /* HPUX9 */
+ val = (current_user.euid != 0 && newlim == RLIM_INFINITY &&
+ (mode & LIMIT_HARD) == 0 && /* XXX -- test */
+ (limit.rlim_cur <= limit.rlim_max))
+ ? limit.rlim_max : newlim;
+ if (mode & LIMIT_SOFT)
+ limit.rlim_cur = val;
+ if (mode & LIMIT_HARD)
+ limit.rlim_max = val;
+
+ return (setrlimit (limits[ind].parameter, &limit));
+#else
+ errno = EINVAL;
+ return -1;
+#endif
+ }
+}
- if (getrlimit (RLIMIT_STACK, &rl) < 0)
- return ((RLIMTYPE)-1);
- else
- maxstack = (mode & LIMIT_SOFT) ? rl.rlim_cur : rl.rlim_max;
+static int
+getmaxvm (softlim, hardlim)
+ RLIMTYPE *softlim, *hardlim;
+{
+#if defined (HAVE_RESOURCE)
+ struct rlimit datalim, stacklim;
+
+ if (getrlimit (RLIMIT_DATA, &datalim) < 0)
+ return -1;
+
+ if (getrlimit (RLIMIT_STACK, &stacklim) < 0)
+ return -1;
/* Protect against overflow. */
- return ((maxdata / 1024L) + (maxstack / 1024L));
-#endif /* !RLIMIT_VMEM */
-}
+ *softlim = (datalim.rlim_cur / 1024L) + (stacklim.rlim_cur / 1024L);
+ *hardlim = (datalim.rlim_max / 1024L) + (stacklim.rlim_max / 1024L);
+ return 0;
+#else
+ errno = EINVAL;
+ return -1;
#endif /* HAVE_RESOURCE */
+}
-static RLIMTYPE
-open_files (mode)
- int mode;
+static int
+filesize(valuep)
+ RLIMTYPE *valuep;
{
-#if !defined (RLIMIT_NOFILE)
- return ((RLIMTYPE)getdtablesize ());
-#else
- struct rlimit rl;
-
- getrlimit (RLIMIT_NOFILE, &rl);
- if (mode & LIMIT_SOFT)
- return (rl.rlim_cur);
+#if !defined (HAVE_RESOURCE)
+ long result;
+ if ((result = ulimit (1, 0L)) < 0)
+ return -1;
else
- return (rl.rlim_max);
+ *valuep = (RLIMTYPE) result * 512;
+ return 0;
+#else
+ errno = EINVAL;
+ return -1;
#endif
}
-static RLIMTYPE
-pipesize ()
+static int
+pipesize (valuep)
+ RLIMTYPE *valuep;
{
#if defined (PIPE_BUF)
/* This is defined on Posix systems. */
- return ((RLIMTYPE) PIPE_BUF);
+ *valuep = (RLIMTYPE) PIPE_BUF;
+ return 0;
#else
-# if defined (PIPESIZE)
- /* This is defined by running a program from the Makefile. */
- return ((RLIMTYPE) PIPESIZE);
+# if defined (_POSIX_PIPE_BUF)
+ *valuep = (RLIMTYPE) _POSIX_PIPE_BUF;
+ return 0;
# else
+# if defined (PIPESIZE)
+ /* This is defined by running a program from the Makefile. */
+ *valuep = (RLIMTYPE) PIPESIZE;
+ return 0;
+# else
errno = EINVAL;
- return ((RLIMTYPE)-1);
-# endif /* PIPESIZE */
+ return -1;
+# endif /* PIPESIZE */
+# endif /* _POSIX_PIPE_BUF */
#endif /* PIPE_BUF */
}
-/* ulimit(2) returns information about file size limits in terms of 512-byte
- blocks. This is the factor by which to divide to turn it into information
- in terms of 1024-byte blocks. Except for hpux 6.x, which returns it in
- terms of bytes. */
-#if !defined (hpux) || defined (_POSIX_VERSION)
-# define ULIMIT_DIVISOR 2
-#else
-# define ULIMIT_DIVISOR 1024
-#endif
-
-#if defined (HAVE_RESOURCE)
-
-typedef struct {
- int option_cmd; /* The ulimit command for this limit. */
- int parameter; /* Parameter to pass to getrlimit (). */
- int block_factor; /* Blocking factor for specific limit. */
- char *description; /* Descriptive string to output. */
-} BSD_RESOURCE_LIMITS;
-
-static BSD_RESOURCE_LIMITS limits[] = {
- { u_CORE_FILE_SIZE, RLIMIT_CORE, 1024, "core file size (blocks)" },
- { u_DATA_SEG_SIZE, RLIMIT_DATA, 1024, "data seg size (kbytes)" },
- { u_FILE_SIZE, RLIMIT_FSIZE, 1024, "file size (blocks)" },
-#if !defined (USGr4) && defined (RLIMIT_RSS)
- { u_PHYS_MEM_SIZE, RLIMIT_RSS, 1024, "max memory size (kbytes)" },
-#endif /* USGr4 && RLIMIT_RSS */
- { u_STACK_SIZE, RLIMIT_STACK, 1024, "stack size (kbytes)" },
-#if defined (RLIMIT_CPU)
- { u_CPU_TIME_LIMIT, RLIMIT_CPU, 1, "cpu time (seconds)" },
-#endif /* RLIMIT_CPU */
-#if defined (RLIMIT_NPROC)
- { u_MAX_USER_PROCS, RLIMIT_NPROC, 1, "max user processes" },
-#endif /* RLIMIT_NPROC */
- { 0, 0, 0, (char *)NULL }
-};
-
-static void
-print_bsd_limit (i, mode)
- int i, mode;
+static int
+getmaxuprc (valuep)
+ RLIMTYPE *valuep;
{
- struct rlimit rl;
- RLIMTYPE limit;
+ long maxchild;
- getrlimit (limits[i].parameter, &rl);
- if (mode & LIMIT_HARD)
- limit = rl.rlim_max;
- else
- limit = rl.rlim_cur;
- printf ("%-25s", limits[i].description);
- if (limit == RLIM_INFINITY)
- printf ("unlimited\n");
+ maxchild = getmaxchild ();
+ if (maxchild < 0)
+ {
+ errno = EINVAL;
+ return -1;
+ }
else
- print_rlimtype ((limit / limits[i].block_factor), 1);
+ {
+ *valuep = (RLIMTYPE) maxchild;
+ return 0;
+ }
}
static void
-print_specific_bsd_limits (cmd, mode)
- int cmd, mode;
+print_all_limits (mode)
+ int mode;
{
register int i;
+ RLIMTYPE softlim, hardlim;
- for (i = 0; limits[i].option_cmd; i++)
- if (cmd & limits[i].option_cmd)
- print_bsd_limit (i, mode);
-}
-#endif /* HAVE_RESOURCE */
-
-/* Print the limits corresponding to a specific set of resources. This is
- called when an option string contains more than one character (e.g. -at),
- because limits may not be specified with that kind of argument. */
-static void
-print_specific_limits (cmd, mode)
- int cmd, mode;
-{
if (mode == 0)
- mode = LIMIT_SOFT;
+ mode |= LIMIT_SOFT;
-#if defined (HAVE_RESOURCE)
- print_specific_bsd_limits (cmd, mode);
-#else /* !HAVE_RESOURCE */
- if (cmd & u_FILE_SIZE)
+ for (i = 0; limits[i].option > 0; i++)
{
- printf ("%-25s", "file size (blocks)");
- print_rlimtype ((ulimit (1, 0L) / ULIMIT_DIVISOR), 1);
+ if (get_limit (i, &softlim, &hardlim) == 0)
+ printone (i, (mode & LIMIT_SOFT) ? softlim : hardlim, 1);
+ else if (errno != EINVAL)
+ builtin_error ("%s: cannot get limit: %s", limits[i].description,
+ strerror (errno));
}
-#endif /* !HAVE_RESOURCE */
+}
- if (cmd & u_PIPE_SIZE)
- {
- printf ("%-25s", "pipe size (512 bytes)");
- print_rlimtype ((pipesize () / 512), 1);
- }
+static void
+printone (limind, curlim, pdesc)
+ int limind;
+ RLIMTYPE curlim;
+ int pdesc;
+{
+ char unitstr[64];
+ int factor;
- if (cmd & u_NUM_OPEN_FILES)
+ factor = BLOCKSIZE(limits[limind].block_factor);
+ if (pdesc)
{
- printf ("%-25s", "open files");
- print_rlimtype (open_files (mode), 1);
- }
+ if (limits[limind].units)
+ sprintf (unitstr, "(%s, -%c) ", limits[limind].units, limits[limind].option);
+ else
+ sprintf (unitstr, "(-%c) ", limits[limind].option);
-#if defined (HAVE_RESOURCE)
- if (cmd & u_MAX_VIRTUAL_MEM)
- {
- printf ("%-25s", "virtual memory (kbytes)");
- print_rlimtype (getmaxvm (mode), 1);
+ printf ("%-20s %16s", limits[limind].description, unitstr);
}
-#endif /* HAVE_RESOURCE */
+ if (curlim == RLIM_INFINITY)
+ puts ("unlimited");
+ else if (curlim == RLIM_SAVED_MAX)
+ puts ("hard");
+ else if (curlim == RLIM_SAVED_CUR)
+ puts ("soft");
+ else
+ print_rlimtype ((curlim / factor), 1);
}
-static void
-print_all_limits (mode)
+/* Set all limits to NEWLIM. NEWLIM currently must be RLIM_INFINITY, which
+ causes all limits to be set as high as possible depending on mode (like
+ csh `unlimit'). Returns -1 if NEWLIM is invalid, 0 if all limits
+ were set successfully, and 1 if at least one limit could not be set.
+
+ To raise all soft limits to their corresponding hard limits, use
+ ulimit -S -a unlimited
+ To attempt to raise all hard limits to infinity (superuser-only), use
+ ulimit -H -a unlimited
+ To attempt to raise all soft and hard limits to infinity, use
+ ulimit -a unlimited
+*/
+
+static int
+set_all_limits (mode, newlim)
int mode;
+ RLIMTYPE newlim;
{
- if (mode == 0)
- mode |= LIMIT_SOFT;
+ register int i;
+ int retval = 0;
- print_specific_limits (u_ALL_LIMITS, mode);
+ if (newlim != RLIM_INFINITY)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (mode == 0)
+ mode = LIMIT_SOFT|LIMIT_HARD;
+
+ for (retval = i = 0; limits[i].option > 0; i++)
+ if (set_limit (i, newlim, mode) < 0)
+ {
+ builtin_error (_("%s: cannot modify limit: %s"), limits[i].description,
+ strerror (errno));
+ retval = 1;
+ }
+ return retval;
}
+
+#endif /* !_MINIX */
projects / thirdparty / bash.git / blobdiff