Initial revision
authorroland <roland>
Wed, 12 Jun 1991 17:26:31 +0000 (17:26 +0000)
committerroland <roland>
Wed, 12 Jun 1991 17:26:31 +0000 (17:26 +0000)
posix/getconf.c [new file with mode: 0644]

diff --git a/posix/getconf.c b/posix/getconf.c
new file mode 100644 (file)
index 0000000..ea6cf71
--- /dev/null
@@ -0,0 +1,134 @@
+/* Copyright (C) 1991 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", clen, cvalue);
+           exit(0);
+         }
+      }
+
+  fprintf(stderr, "%s: Unrecognized variable `%s'", program, argv[1]);
+  exit(2);
+}