text: /*
   * ORIGINAL COPYRIGHT STATEMENT:
   *
   * Copyright (c) 1994 Winning Strategies, Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *      This product includes software developed by Winning Strategies, Inc.
   * 4. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  /*
   * POSIX.2 getconf utility
   *
   * Originally Written by:
   *	J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
   *
   * Heavily modified for inclusion in bash by
   *	Chet Ramey <chet@po.cwru.edu>
   */
  
  #include <stdio.h>
  #include <limits.h>
  #include <locale.h>
  #include <unistd.h>
  #include <errno.h>
  #include "bashansi.h"
  #include "shell.h"
  #include "builtins.h"
  #include "stdc.h"
  #include "common.h"
  #include "bashgetopt.h"
  
  struct conf_variable
  {
    const char *name;
    enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type;
    long value;
  };
  
  /* Some systems do not define these; use POSIX.2 minimum recommended values. */
  #ifndef _POSIX2_COLL_WEIGHTS_MAX
  #  define _POSIX2_COLL_WEIGHTS_MAX 2
  #endif
  
  static const struct conf_variable conf_table[] =
  {
    /* POSIX.2 Configurable Variable Values */
    { "PATH",			CONFSTR,	_CS_PATH		},
    { "CS_PATH",			CONFSTR,	_CS_PATH		},
  
    /* POSIX.1 Configurable Variable Values (only Solaris?) */
  #if defined (_CS_LFS_CFLAGS)
    { "LFS_CFLAGS",		CONFSTR,	_CS_LFS_CFLAGS		},
    { "LFS_LDFLAGS",		CONFSTR,	_CS_LFS_LDFLAGS		},
    { "LFS_LIBS",			CONFSTR,	_CS_LFS_LIBS		},
    { "LFS_LINTFLAGS",		CONFSTR,	_CS_LFS_LINTFLAGS	},
  #endif
  #if defined (_CS_LFS64_CFLAGS)
    { "LFS64_CFLAGS",		CONFSTR,	_CS_LFS64_CFLAGS	},
    { "LFS64_LDFLAGS",		CONFSTR,	_CS_LFS64_LDFLAGS	},
    { "LFS64_LIBS",		CONFSTR,	_CS_LFS64_LIBS		},
    { "LFS64_LINTFLAGS",		CONFSTR,	_CS_LFS64_LINTFLAGS	},
  #endif
  
    /* Single UNIX Specification version 2 Configurable Variable Values */
  #if defined (_CS_XBS5_ILP32_OFF32_CFLAGS)
    { "XBS5_ILP32_OFF32_CFLAGS",  	CONFSTR,	_CS_XBS5_ILP32_OFF32_CFLAGS },
    { "XBS5_ILP32_OFF32_LDFLAGS",		CONFSTR,	_CS_XBS5_ILP32_OFF32_LDFLAGS },
    { "XBS5_ILP32_OFF32_LIBS",    	CONFSTR,	_CS_XBS5_ILP32_OFF32_LIBS },
    { "XBS5_ILP32_OFF32_LINTFLAGS",       CONFSTR,	_CS_XBS5_ILP32_OFF32_LINTFLAGS },
    { "XBS5_ILP32_OFFBIG_CFLAGS", 	CONFSTR,	_CS_XBS5_ILP32_OFFBIG_CFLAGS },
    { "XBS5_ILP32_OFFBIG_LDFLAGS",	CONFSTR,	_CS_XBS5_ILP32_OFFBIG_LDFLAGS },
    { "XBS5_ILP32_OFFBIG_LIBS",   	CONFSTR,	_CS_XBS5_ILP32_OFFBIG_LIBS },
    { "XBS5_ILP32_OFFBIG_LINTFLAGS",      CONFSTR,	_CS_XBS5_ILP32_OFFBIG_LINTFLAGS },
    { "XBS5_LP64_OFF64_CFLAGS",   	CONFSTR,	_CS_XBS5_LP64_OFF64_CFLAGS },
    { "XBS5_LP64_OFF64_LDFLAGS",  	CONFSTR,	_CS_XBS5_LP64_OFF64_LDFLAGS },
    { "XBS5_LP64_OFF64_LIBS",     	CONFSTR,	_CS_XBS5_LP64_OFF64_LIBS },
    { "XBS5_LP64_OFF64_LINTFLAGS",	CONFSTR,	_CS_XBS5_LP64_OFF64_LINTFLAGS },
    { "XBS5_LPBIG_OFFBIG_CFLAGS", 	CONFSTR,	_CS_XBS5_LPBIG_OFFBIG_CFLAGS },
    { "XBS5_LPBIG_OFFBIG_LDFLAGS",	CONFSTR,	_CS_XBS5_LPBIG_OFFBIG_LDFLAGS },
    { "XBS5_LPBIG_OFFBIG_LIBS",   	CONFSTR,	_CS_XBS5_LPBIG_OFFBIG_LIBS },
    { "XBS5_LPBIG_OFFBIG_LINTFLAGS",      CONFSTR,	_CS_XBS5_LPBIG_OFFBIG_LINTFLAGS },
  #endif /* _CS_XBS5_ILP32_OFF32_CFLAGS */
  
    /* POSIX.2 Utility Limit Minimum Values */
    { "POSIX2_BC_BASE_MAX",	CONSTANT,	_POSIX2_BC_BASE_MAX	},
    { "POSIX2_BC_DIM_MAX",	CONSTANT,	_POSIX2_BC_DIM_MAX	},
    { "POSIX2_BC_SCALE_MAX",	CONSTANT,	_POSIX2_BC_SCALE_MAX	},
    { "POSIX2_BC_STRING_MAX",	CONSTANT,	_POSIX2_BC_STRING_MAX	},
    { "POSIX2_COLL_WEIGHTS_MAX",	CONSTANT,	_POSIX2_COLL_WEIGHTS_MAX },
  #if defined (_POSIX2_EQUIV_CLASS_MAX)
    { "POSIX2_EQUIV_CLASS_MAX",	CONSTANT,	_POSIX2_EQUIV_CLASS_MAX	},
  #endif
    { "POSIX2_EXPR_NEST_MAX",	CONSTANT,	_POSIX2_EXPR_NEST_MAX	},
    { "POSIX2_LINE_MAX",		CONSTANT,	_POSIX2_LINE_MAX	},
    { "POSIX2_RE_DUP_MAX",	CONSTANT,	_POSIX2_RE_DUP_MAX	},
  #if defined (_POSIX2_VERSION)
    { "POSIX2_VERSION",		CONSTANT,	_POSIX2_VERSION		},
  #endif
  
    /* POSIX.1 Minimum Values */
    { "_POSIX_ARG_MAX",		CONSTANT,	_POSIX_ARG_MAX		},
    { "_POSIX_CHILD_MAX",		CONSTANT,	_POSIX_CHILD_MAX	},
    { "_POSIX_LINK_MAX",		CONSTANT,	_POSIX_LINK_MAX		},
    { "_POSIX_MAX_CANON",		CONSTANT,	_POSIX_MAX_CANON	},
    { "_POSIX_MAX_INPUT",		CONSTANT,	_POSIX_MAX_INPUT	},
    { "_POSIX_NAME_MAX",		CONSTANT,	_POSIX_NAME_MAX		},
    { "_POSIX_NGROUPS_MAX",	CONSTANT,	_POSIX_NGROUPS_MAX	},
    { "_POSIX_OPEN_MAX",		CONSTANT,	_POSIX_OPEN_MAX		},
    { "_POSIX_PATH_MAX",		CONSTANT,	_POSIX_PIPE_BUF		},
    { "_POSIX_PIPE_BUF",		CONSTANT,	_POSIX_PIPE_BUF		},
    { "_POSIX_SSIZE_MAX",		CONSTANT,	_POSIX_SSIZE_MAX	},
    { "_POSIX_STREAM_MAX",	CONSTANT,	_POSIX_STREAM_MAX	},
    { "_POSIX_TZNAME_MAX",	CONSTANT,	_POSIX_TZNAME_MAX	},
  
    /* POSIX.2 Symbolic Utility Limits */
    { "BC_BASE_MAX",		SYSCONF,	_SC_BC_BASE_MAX		},
    { "BC_DIM_MAX",		SYSCONF,	_SC_BC_DIM_MAX		},
    { "BC_SCALE_MAX",		SYSCONF,	_SC_BC_SCALE_MAX	},
    { "BC_STRING_MAX",		SYSCONF,	_SC_BC_STRING_MAX	},
    { "COLL_WEIGHTS_MAX",		SYSCONF,	_SC_COLL_WEIGHTS_MAX	},
    { "EXPR_NEST_MAX",		SYSCONF,	_SC_EXPR_NEST_MAX	},
    { "LINE_MAX",			SYSCONF,	_SC_LINE_MAX		},
    { "RE_DUP_MAX",		SYSCONF,	_SC_RE_DUP_MAX		},
  
    /* POSIX.2 Optional Facility Configuration Values */
    { "POSIX2_C_BIND",		SYSCONF,	_SC_2_C_BIND		},
    { "POSIX2_C_DEV",		SYSCONF,	_SC_2_C_DEV		},
  #if defined (_SC_2_C_VERSION)
    { "POSIX2_C_VERSION",		SYSCONF,	_SC_2_C_VERSION		},
  #endif
  #if defined (_SC_2_CHAR_TERM)
    { "POSIX2_CHAR_TERM",		SYSCONF,	_SC_2_CHAR_TERM		},
  #endif
    { "POSIX2_FORT_DEV",		SYSCONF,	_SC_2_FORT_DEV		},
    { "POSIX2_FORT_RUN",		SYSCONF,	_SC_2_FORT_RUN		},
    { "POSIX2_LOCALEDEF",		SYSCONF,	_SC_2_LOCALEDEF		},
    { "POSIX2_SW_DEV",		SYSCONF,	_SC_2_SW_DEV		},
  #if defined (_SC2_UPE)
    { "POSIX2_UPE",		SYSCONF,	_SC_2_UPE		},
  #endif
  #if !defined (_POSIX2_VERSION) && defined (_SC_2_VERSION)
    { "POSIX2_VERSION"		SYSCONF,	_SC_2_VERSION		},
  #endif
  
    /* POSIX.1 Configurable System Variables */
    { "ARG_MAX",			SYSCONF,	_SC_ARG_MAX 		},
    { "CHILD_MAX",		SYSCONF,	_SC_CHILD_MAX		},
    { "CLK_TCK",			SYSCONF,	_SC_CLK_TCK		},
    { "NGROUPS_MAX",		SYSCONF,	_SC_NGROUPS_MAX		},
    { "OPEN_MAX",			SYSCONF,	_SC_OPEN_MAX		},
    { "STREAM_MAX",		SYSCONF,	_SC_STREAM_MAX		},
    { "TZNAME_MAX",		SYSCONF,	_SC_TZNAME_MAX		},
    { "_POSIX_JOB_CONTROL",	SYSCONF,	_SC_JOB_CONTROL 	},
    { "_POSIX_SAVED_IDS",		SYSCONF,	_SC_SAVED_IDS		},
    { "_POSIX_VERSION",		SYSCONF,	_SC_VERSION		},
  
    /* POSIX.1 Optional Facility Configuration Values */
  #if defined (_SC_ASYNCHRONOUS_IO)
    { "_POSIX_ASYNCHRONOUS_IO",	SYSCONF,	_SC_ASYNCHRONOUS_IO	},
  #endif
  #if defined (_SC_FSYNC)
    { "_POSIX_FSYNC",		SYSCONF,	_SC_FSYNC		},
  #endif
  #if defined (_SC_MAPPED_FILES)
    { "_POSIX_MAPPED_FILES",	SYSCONF,	_SC_MAPPED_FILES	},
  #endif
  #if defined (_SC_MEMLOCK)
    { "_POSIX_MEMLOCK",		SYSCONF,	_SC_MEMLOCK		},
  #endif
  #if defined (_SC_MEMLOCK_RANGE)
    { "_POSIX_MEMLOCK_RANGE",	SYSCONF,	_SC_MEMLOCK_RANGE	},
  #endif
  #if defined (_SC_MEMORY_PROTECTION)
    { "_POSIX_MEMORY_PROTECTION",	SYSCONF,	_SC_MEMORY_PROTECTION	},
  #endif
  #if defined (_SC_MESSAGE_PASSING)
    { "_POSIX_MESSAGE_PASSING",	SYSCONF,	_SC_MESSAGE_PASSING	},
  #endif
  #if defined (SC_PRIORITIZED_IO)
    { "_POSIX_PRIORITIZED_IO",	SYSCONF,	_SC_PRIORITIZED_IO	},
  #endif
  #if defined (_SC_PRIORITY_SCHEDULING)
    { "_POSIX_PRIORITY_SCHEDULING", SYSCONF,	_SC_PRIORITY_SCHEDULING	},
  #endif
  #if defined (_SC_REALTIME_SIGNALS)
    { "_POSIX_REALTIME_SIGNALS",	SYSCONF,	_SC_REALTIME_SIGNALS	},
  #endif
  #if defined (_SC_SEMAPHORES)
    { "_POSIX_SEMAPHORES",	SYSCONF,	_SC_SEMAPHORES		},
  #endif
  #if defined (_SC_SHARED_MEMORY_OBJECTS)
    { "_POSIX_SHARED_MEMORY_OBJECTS", SYSCONF,	_SC_SHARED_MEMORY_OBJECTS },
  #endif
  #if defined (_SC_SYNCHRONIZED_IO)
    { "_POSIX_SYNCHRONIZED_IO",	SYSCONF,	_SC_SYNCHRONIZED_IO	},
  #endif
  #if defined (_SC_TIMERS)
    { "_POSIX_TIMERS",		SYSCONF,	_SC_TIMERS		},
  #endif
  #if defined (_SC_THREADS)
    { "_POSIX_THREADS",		SYSCONF,	_SC_THREADS		},
    { "_POSIX_THREAD_ATTR_STACKADDR", SYSCONF,	_SC_THREAD_ATTR_STACKADDR },
    { "_POSIX_THREAD_ATTR_STACKSIZE", SYSCONF,	_SC_THREAD_ATTR_STACKSIZE },
    { "_POSIX_THREAD_PRIORITY_SCHEDULING", SYSCONF, _SC_THREAD_PRIORITY_SCHEDULING },
    { "_POSIX_THREAD_PRIO_INHERIT", SYSCONF,	_SC_THREAD_PRIO_INHERIT	},
    { "_POSIX_THREAD_PRIO_PROTECT", SYSCONF,	_SC_THREAD_PRIO_PROTECT	},
    { "_POSIX_THREAD_PROCESS_SHARED", SYSCONF,	_SC_THREAD_PROCESS_SHARED },
  #  if defined (_SC_THREAD_SAFE_FUNCTIONS)
    { "_POSIX_THREAD_SAFE_FUNCTIONS", SYSCONF,	_SC_THREAD_SAFE_FUNCTIONS },
  #  endif
  #endif /* _SC_THREADS */
  
    /* XPG 4.2 Configurable System Variables. */
  #if defined (_SC_ATEXIT_MAX)
    { "ATEXIT_MAX",		SYSCONF,	_SC_ATEXIT_MAX		},
  #endif
  #if defined (_SC_IOV_MAX)
    { "IOV_MAX",			SYSCONF,	_SC_IOV_MAX		},
  #endif
  #if defined (_SC_PAGESIZE)
    { "PAGESIZE",			SYSCONF,	_SC_PAGESIZE		},
  #endif
  #if defined (_SC_PAGE_SIZE)
    { "PAGE_SIZE",		SYSCONF,	_SC_PAGE_SIZE		},
  #endif
  
  #if defined (_SC_AIO_LISTIO_MAX)
    { "AIO_LISTIO_MAX",		SYSCONF,	_SC_AIO_LISTIO_MAX	},
    { "AIO_MAX",			SYSCONF,	_SC_AIO_MAX		},
    { "AIO_PRIO_DELTA_MAX",	SYSCONF,	_SC_AIO_PRIO_DELTA_MAX	},
    { "DELAYTIMER_MAX",		SYSCONF,	_SC_DELAYTIMER_MAX	},
  #if defined (_SC_GETGR_R_SIZE_MAX)
    { "GETGR_R_SIZE_MAX",		SYSCONF,	_SC_GETGR_R_SIZE_MAX	},
  #endif
  #if defined (_SC_GETPW_R_SIZE_MAX)
    { "GETPW_R_SIZE_MAX",		SYSCONF,	_SC_GETPW_R_SIZE_MAX	},
  #endif
    { "MQ_OPEN_MAX",		SYSCONF,	_SC_MQ_OPEN_MAX		},
    { "MQ_PRIO_MAX",		SYSCONF,	_SC_MQ_PRIO_MAX		},
    { "RTSIG_MAX",		SYSCONF,	_SC_RTSIG_MAX		},
    { "SEM_NSEMS_MAX",		SYSCONF,	_SC_SEM_NSEMS_MAX	},
    { "SEM_VALUE_MAX",		SYSCONF,	_SC_SEM_VALUE_MAX	},
    { "SIGQUEUE_MAX",		SYSCONF,	_SC_SIGQUEUE_MAX	},
    { "TIMER_MAX",		SYSCONF,	_SC_TIMER_MAX		},
  #endif /* _SC_AIO_LISTIO_MAX */
  #if defined (_SC_LOGIN_NAME_MAX)
    { "LOGIN_NAME_MAX",		SYSCONF,	_SC_LOGIN_NAME_MAX	},
  #endif
  #if defined (_SC_LOGNAME_MAX)
    { "LOGNAME_MAX",		SYSCONF,	_SC_LOGNAME_MAX		},
  #endif
  #if defined (_SC_TTY_NAME_MAX)
    { "TTY_NAME_MAX",		SYSCONF,	_SC_TTY_NAME_MAX	},
  #endif
  
  #if defined (_SC_PTHREAD_DESTRUCTOR_ITERATIONS)
    { "PTHREAD_DESTRUCTOR_ITERATIONS", SYSCONF,	_SC_THREAD_DESTRUCTOR_ITERATIONS },
    { "PTHREAD_KEYS_MAX",		SYSCONF,	_SC_THREAD_KEYS_MAX },
    { "PTHREAD_STACK_MIN",	SYSCONF,	_SC_THREAD_STACK_MIN },
    { "PTHREAD_THREADS_MAX",	SYSCONF,	_SC_THREAD_THREADS_MAX },
  #endif /* _SC_PTHREAD_DESTRUCTOR_ITERATIONS */
  
    /* XPG 4.2 Optional Facility Configuration Values */
  #if defined (_SC_XOPEN_UNIX)
    { "_XOPEN_UNIX",		SYSCONF,	_SC_XOPEN_UNIX		},
    { "_XOPEN_CRYPT",		SYSCONF,	_SC_XOPEN_CRYPT		},
    { "_XOPEN_ENH_I18N",		SYSCONF,	_SC_XOPEN_ENH_I18N	},
    { "_XOPEN_SHM",		SYSCONF,	_SC_XOPEN_SHM		},
    { "_XOPEN_VERSION",		SYSCONF,	_SC_XOPEN_VERSION	},
  #  if defined (_SC_XOPEN_XCU_VERSION)
    { "_XOPEN_XCU_VERSION",	SYSCONF,	_SC_XOPEN_XCU_VERSION	},
  #  endif
  #endif
  #if defined (_SC_XOPEN_REALTIME)
    { "_XOPEN_REALTIME",		SYSCONF,	_SC_XOPEN_REALTIME	},
    { "_XOPEN_REALTIME_THREADS",	SYSCONF,	_SC_XOPEN_REALTIME_THREADS },
  #endif
  #if defined (_SC_XOPEN_LEGACY)
    { "_XOPEN_LEGACY",		SYSCONF,	_SC_XOPEN_LEGACY	},
  #endif /* _SC_XOPEN_LEGACY */
  
    /* Single UNIX Specification version 2 Optional Facility Configuration Values */
  #if defined (_SC_XBS5_ILP32_OFF32)
    { "_XBS5_ILP32_OFF32",	SYSCONF,	_SC_XBS5_ILP32_OFF32	},
    { "_XBS5_ILP32_OFFBIG",	SYSCONF,	_SC_XBS5_ILP32_OFFBIG	},
    { "_XBS5_LP64_OFF64",		SYSCONF,	_SC_XBS5_LP64_OFF64	},
    { "_XBS5_LPBIG_OFFBIG",	SYSCONF,	_SC_XBS5_LPBIG_OFFBIG	},
  #endif /* _SC_XBS5_ILP32_OFF32 */
  
    /* POSIX.1 Configurable Pathname Values */
    { "LINK_MAX",			PATHCONF,	_PC_LINK_MAX		},
    { "MAX_CANON",		PATHCONF,	_PC_MAX_CANON		},
    { "MAX_INPUT",		PATHCONF,	_PC_MAX_INPUT		},
    { "NAME_MAX",			PATHCONF,	_PC_NAME_MAX		},
    { "PATH_MAX",			PATHCONF,	_PC_PATH_MAX		},
    { "PIPE_BUF",			PATHCONF,	_PC_PIPE_BUF		},
    { "_POSIX_CHOWN_RESTRICTED",	PATHCONF,	_PC_CHOWN_RESTRICTED	},
    { "_POSIX_NO_TRUNC",		PATHCONF,	_PC_NO_TRUNC		},
    { "_POSIX_VDISABLE",		PATHCONF,	_PC_VDISABLE		},
  
    /* XPG 4.2 Configurable Pathname Values */
  #if defined (_PC_FILESIZEBITS)
    { "FILESIZEBITS",		PATHCONF,	_PC_FILESIZEBITS },
  #endif
  #if defined (_PC_ASYNC_IO)
    { "_POSIX_ASYNC_IO",		PATHCONF,	_PC_ASYNC_IO },
  #endif
  #if defined (_PC_PRIO_IO)
    { "_POSIX_PRIO_IO",		PATHCONF,	_PC_PRIO_IO },
  #endif
  #if defined (_PC_SYNC_IO)
    { "_POSIX_SYNC_IO",		PATHCONF,	_PC_SYNC_IO },
  #endif
  
    { NULL }
  };
  
  static int num_getconf_variables = sizeof(conf_table) / sizeof(struct conf_variable) - 1;
  
  extern char *this_command_name;
  extern char *xmalloc ();
  extern char **make_builtin_argv ();
  
  static void getconf_help ();
  static int getconf_print ();
  static int getconf_one ();
  static int getconf_all ();
  
  int
  getconf_builtin (list)
       WORD_LIST *list;
  {
    int c, r, opt, aflag;
    char **v;
  
    aflag = 0;
    reset_internal_getopt();
    while ((opt = internal_getopt (list, "ah")) != -1) {
    	switch (opt) {
    	case 'a':
    		aflag = 1;
    		break;
    	case 'h':
    		getconf_help();
    		return(EXECUTION_SUCCESS);
    	default:
    		builtin_usage();
    		return(EX_USAGE);
    	}
    }
   
    list = loptend;
    if ((aflag == 0 && list == 0) || (aflag && list) || list_length(list) > 2) {
    	builtin_usage();
    	return(EX_USAGE);
    }
  
    r = aflag ? getconf_all() : getconf_one(list);
  
    return r;
  }
  
  static void
  getconf_help()
  {
  	const struct conf_variable *cp;
  	register int i, column;
  
  	builtin_usage();
  	printf("Acceptable variable names are:\n");
  	for (cp = conf_table; cp->name != NULL; cp++) {
  		if (cp->type == PATHCONF)
  			printf("%s pathname\n", cp->name);
  		else
  			printf("%s\n", cp->name);
  	}
  }
  
  static int
  getconf_print(cp, vpath, all)
  struct conf_variable *cp;
  char *vpath;
  int all;
  {
  	long val;
  	char *sval;
  	size_t slen;
  
  	switch (cp->type) {
  	case CONSTANT:
  		printf("%ld\n", cp->value);
  		break;
  
  	case CONFSTR:
  		errno = 0;
  		slen = confstr (cp->value, (char *) 0, (size_t) 0);
  		if (slen == 0) {
  			if (errno != 0) {
  				if (all)
  					printf ("getconf: %s\n", strerror(errno));
  				else
  					builtin_error ("%s", strerror(errno));
  			} else
  				printf ("undefined\n");
  			return (EXECUTION_FAILURE);
  		}
  		sval = xmalloc(slen);
  
  		confstr(cp->value, sval, slen);
  		printf("%s\n", sval);
  		free(sval);
  		break;
  
  	case SYSCONF:
  		errno = 0;
  		if ((val = sysconf(cp->value)) == -1) {
  			if (errno != 0) {
  				if (all)
  					printf("getconf: %s\n", strerror (errno));
  				else
  					builtin_error ("%s", strerror (errno));
  				return (EXECUTION_FAILURE);
  			}
  
  			printf ("undefined\n");
  		} else {
  			printf("%ld\n", val);
  		}
  		break;
  
  	case PATHCONF:
  		errno = 0;
  		if ((val = pathconf(vpath, cp->value)) == -1) {
  			if (errno != 0) {
  				if (all)
  					printf("getconf: %s: %s\n", vpath, strerror (errno));
  				else
  					builtin_error ("%s: %s", vpath, strerror (errno));
  				return (EXECUTION_FAILURE);
  			}
  
  			printf ("undefined\n");
  		} else {
  			printf ("%ld\n", val);
  		}
  		break;
  	}
  
  	return (ferror(stdout) ? EXECUTION_FAILURE : EXECUTION_SUCCESS);
  }
  
  static int
  getconf_all()
  {
  	const struct conf_variable *cp;
  	int ret;
  
  	ret = EXECUTION_SUCCESS;
  	for (cp = conf_table; cp->name != NULL; cp++) {
  		printf("%-35s", cp->name);
  		if (getconf_print(cp, ".", 1) == EXECUTION_FAILURE)
  			ret = EXECUTION_FAILURE;
  	}
  	return ret;
  }
  
  static int
  getconf_one(list)
  	WORD_LIST *list;
  {
  	const struct conf_variable *cp;
  	char *vname, *vpath;
  
  	vname = list->word->word;
  	vpath = (list->next && list->next->word) ? list->next->word->word
  						 : (char *)NULL;
  
  	for (cp = conf_table; cp->name != NULL; cp++) {
  		if (strcmp(vname, cp->name) == 0)
  			break;
  	}
  	if (cp->name == NULL) {
  		builtin_error ("%s: unknown variable", vname);
  		return (EXECUTION_FAILURE);
  	}
  
  	if (cp->type == PATHCONF) {
  		if (list->next == 0) {
  			builtin_usage();
  			return(EX_USAGE);
  		}
  	} else {
  		if (list->next) {
  			builtin_usage();
  			return(EX_USAGE);
  		}
  	}
  
  	return (getconf_print(cp, vpath, 0));
  }
  
  static char *getconf_doc[] = {
  	"getconf writes the current value of a configurable system limit or",
  	"option variable to the standard output.",
  	(char *)NULL
  };
  
  struct builtin getconf_struct = {
  	"getconf",
  	getconf_builtin,
  	BUILTIN_ENABLED,
  	getconf_doc,
  	"getconf -a or getconf -h or getconf sysvar or getconf pathvar pathname",
  	0
  };
  