per-process limits are resources, not sysctl(3) variables

[unix-history] / usr / src / lib / libc / gen / sysctl.c

/*-
* Copyright (c) 1993 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)sysctl.c    5.2 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/param.h>
#include <sys/sysctl.h>

#include <errno.h>
#include <limits.h>
#include <paths.h>
#include <stdio.h>
#include <unistd.h>

int
sysctl(name, namelen, oldp, oldlenp, newp, newlen)
       int *name;
       u_int namelen;
       void *oldp, *newp;
       size_t *oldlenp, newlen;
{
       if (name[0] != CTL_USER)
               return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen));

       if (newp != NULL) {
               errno = EPERM;
               return (-1);
       }
       if (namelen != 2) {
               errno = EINVAL;
               return (-1);
       }

       switch (name[1]) {
       case USER_CS_PATH:
               if (oldp && *oldlenp < sizeof(_PATH_STDPATH))
                       return (ENOMEM);
               *oldlenp = sizeof(_PATH_STDPATH);
               if (oldp != NULL)
                       memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
               return (0);
       }

       if (oldp && *oldlenp < sizeof(int))
               return (ENOMEM);
       *oldlenp = sizeof(int);
       if (oldp == NULL)
               return (0);

       switch (name[1]) {
       case USER_BC_BASE_MAX:
               *(int *)oldp = BC_BASE_MAX;
               return (0);
       case USER_BC_DIM_MAX:
               *(int *)oldp = BC_DIM_MAX;
               return (0);
       case USER_BC_SCALE_MAX:
               *(int *)oldp = BC_SCALE_MAX;
               return (0);
       case USER_BC_STRING_MAX:
               *(int *)oldp = BC_STRING_MAX;
               return (0);
       case USER_COLL_WEIGHTS_MAX:
               *(int *)oldp = COLL_WEIGHTS_MAX;
               return (0);
       case USER_EXPR_NEST_MAX:
               *(int *)oldp = EXPR_NEST_MAX;
               return (0);
       case USER_LINE_MAX:
               *(int *)oldp = LINE_MAX;
               return (0);
       case USER_RE_DUP_MAX:
               *(int *)oldp = RE_DUP_MAX;
               return (0);
       case USER_POSIX2_VERSION:
               *(int *)oldp = _POSIX2_VERSION;
               return (0);
       case USER_POSIX2_C_BIND:
#ifdef POSIX2_C_BIND
               *(int *)oldp = 1;
#else
               *(int *)oldp = 0;
#endif
               return (0);
       case USER_POSIX2_C_DEV:
#ifdef  POSIX2_C_DEV
               *(int *)oldp = 1;
#else
               *(int *)oldp = 0;
#endif
               return (0);
       case USER_POSIX2_CHAR_TERM:
#ifdef  POSIX2_CHAR_TERM
               *(int *)oldp = 1;
#else
               *(int *)oldp = 0;
#endif
               return (0);
       case USER_POSIX2_FORT_DEV:
#ifdef  POSIX2_FORT_DEV
               *(int *)oldp = 1;
#else
               *(int *)oldp = 0;
#endif
               return (0);
       case USER_POSIX2_FORT_RUN:
#ifdef  POSIX2_FORT_RUN
               *(int *)oldp = 1;
#else
               *(int *)oldp = 0;
#endif
               return (0);
       case USER_POSIX2_LOCALEDEF:
#ifdef  POSIX2_LOCALEDEF
               *(int *)oldp = 1;
#else
               *(int *)oldp = 0;
#endif
               return (0);
       case USER_POSIX2_SW_DEV:
#ifdef  POSIX2_SW_DEV
               *(int *)oldp = 1;
#else
               *(int *)oldp = 0;
#endif
               return (0);
       case USER_POSIX2_UPE:
#ifdef  POSIX2_UPE
               *(int *)oldp = 1;
#else
               *(int *)oldp = 0;
#endif
               return (0);
       case USER_STREAM_MAX:
               *(int *)oldp = FOPEN_MAX;
               return (0);
       case USER_TZNAME_MAX:
               *(int *)oldp = 1024;
               return (0);
       default:
               errno = EINVAL;
               return (-1);
       }
       /* NOTREACHED */
}