diff options
Diffstat (limited to 'posix/getconf.c')
| -rw-r--r-- | posix/getconf.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/posix/getconf.c b/posix/getconf.c new file mode 100644 index 0000000000..e42b909ed9 --- /dev/null +++ b/posix/getconf.c @@ -0,0 +1,134 @@ +/* Copyright (C) 1991, 1992 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <stdlib.h> +#include <stdio.h> + +struct conf + { + CONST char *name; + CONST int call_name; + CONST enum { SYSCONF, CONFSTR, PATHCONF } call; + }; + +static struct conf vars[] = + { + { "LINK_MAX", _PC_LINK_MAX, PATHCONF }, + { "MAX_CANON", _PC_MAX_CANON, PATHCONF }, + { "MAX_INPUT", _PC_MAX_INPUT, PATHCONF }, + { "NAME_MAX", _PC_NAME_MAX, PATHCONF }, + { "PATH_MAX", _PC_PATH_MAX, PATHCONF }, + { "PIPE_BUF", _PC_PIPE_BUF, PATHCONF }, + { "_POSIX_CHOWN_RESTRICTED", _PC_CHOWN_RESTRICTED, PATHCONF }, + { "_POSIX_NO_TRUNC", _PC_NO_TRUNC, PATHCONF }, + { "_POSIX_VDISABLE", _PC_VDISABLE, PATHCONF }, + + { "ARG_MAX", _SC_ARG_MAX, SYSCONF }, + { "CHILD_MAX", _SC_CHILD_MAX, SYSCONF }, + { "CLK_TCK", _SC_CLK_TCK, SYSCONF }, + { "NGROUPS_MAX", _SC_NGROUPS_MAX, SYSCONF }, + { "OPEN_MAX", _SC_OPEN_MAX, SYSCONF }, + { "_POSIX_JOB_CONTROL", _SC_JOB_CONTROL, SYSCONF }, + { "_POSIX_SAVED_IDS", _SC_SAVED_IDS, SYSCONF }, + { "_POSIX_VERSION", _SC_VERSION, SYSCONF }, + + { "PATH", _CS_PATH, CONFSTR }, + + { NULL, 0, SYSCONF } + }; + +static CONST char *program; + +static void +DEFUN_VOID(usage) +{ + fprintf (stderr, "Usage: %s variable_name [pathname]\n", program); + exit (2); +} + +int +DEFUN(main, (argc, argv), int argc AND char **argv) +{ + register CONST struct conf *c; + + program = strrchr (argv[0], '/'); + if (program == NULL) + program = argv[0]; + else + ++program; + + if (argc < 2 || argc > 3) + usage (); + + for (c = vars; c->name != NULL; ++c) + if (!strcmp (c->name, argv[1])) + { + long int value; + size_t clen; + char *cvalue; + switch (c->call) + { + case PATHCONF: + if (argc < 3) + usage (); + value = pathconf (argv[2], c->call_name); + if (value == -1) + { + fprintf (stderr, "%s: pathconf: %s: %s\n", + program, argv[2], strerror (errno)); + exit (3); + } + printf ("%ld\n", value); + exit (0); + + case SYSCONF: + if (argc > 2) + usage (); + value = sysconf (c->call_name); + printf ("%ld\n", value); + exit (0); + + case CONFSTR: + if (argc > 2) + usage (); + clen = confstr (c->call_name, (char *) NULL, 0); + cvalue = (char *) malloc (clen); + if (cvalue == NULL) + { + fprintf (stderr, "%s: malloc: %s\n", + program, strerror (errno)); + exit (3); + } + if (confstr (c->call_name, cvalue, clen) != clen) + { + fprintf (stderr, "%s: confstr: %s\n", + program, strerror (errno)); + exit (3); + } + printf ("%.*s\n", (int) clen, cvalue); + exit (0); + } + } + + fprintf (stderr, "%s: Unrecognized variable `%s'\n", program, argv[1]); + exit (2); +} |