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authorMiles Bader <miles@gnu.org>1996-04-11 00:08:02 +0000
committerMiles Bader <miles@gnu.org>1996-04-11 00:08:02 +0000
commite42165177d89340a106de023bd4c9d5cf918f9ce (patch)
treea86b5b4cfa2e374f92f586557dde49118bb3ac87
parent4fbc3d2ee286970b171f64020f38b2a5befa2628 (diff)
Initial revision
-rw-r--r--utils/devprobe.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/utils/devprobe.c b/utils/devprobe.c
new file mode 100644
index 00000000..558ed717
--- /dev/null
+++ b/utils/devprobe.c
@@ -0,0 +1,104 @@
+/* Check the existence of mach devices
+
+ Copyright (C) 1996 Free Software Foundation, Inc.
+
+ Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+ This program 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 2, or (at
+ your option) any later version.
+
+ This program 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 this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <stdio.h>
+#include <argp.h>
+#include <error.h>
+
+#include <hurd.h>
+#include <mach.h>
+#include <device/device.h>
+
+static const struct argp_option options[] = {
+ {"silent", 's', 0, 0, "Don't print devices found"},
+ {"quiet", 0, 0, OPTION_ALIAS},
+ {"first", 'f', 0, 0, "Stop after the first device found"},
+ {0}
+};
+static const char *args_doc = "DEVNAME...";
+static const char *doc = "The exit status is 0 if any devices were found.";
+
+int
+main (int argc, char **argv)
+{
+ error_t err;
+ mach_port_t device_master;
+ /* Print devices found? (otherwise only exit status matters) */
+ int print = 1;
+ /* If printing, print all devices on the command line that are found.
+ Otherwise, just the first one found is printed. */
+ int all = 1;
+ int found_one = 0;
+
+ /* Parse our options... */
+ error_t parse_opt (int key, char *arg, struct argp_state *state)
+ {
+ switch (key)
+ {
+ error_t err;
+ device_t device;
+
+ case 's': case 'q':
+ /* Don't print any output. Since our exit status only reflects
+ whether any one of the devices exists, there's no point in
+ probing past the first one. */
+ print = all = 0; break;
+
+ case 'f':
+ all = 0; break;
+
+ case ARGP_KEY_ARG:
+ err = device_open (device_master, 0, arg, &device);
+ if (err == 0)
+ /* Got it. */
+ {
+ /* Free the device port we got. */
+ mach_port_deallocate (mach_task_self (), device);
+
+ if (print)
+ puts (arg);
+
+ if (! all)
+ /* Only care about the first device found, so declare success
+ and... */
+ exit (0);
+
+ found_one = 1;
+ }
+ else if (err != ED_NO_SUCH_DEVICE)
+ /* Complain about unexpected errors. */
+ error (0, err, "%s", arg);
+ break;
+
+ default: return EINVAL;
+ }
+ return 0;
+ }
+ const struct argp argp = { options, parse_opt, args_doc, doc };
+
+ err = get_privileged_ports (0, &device_master);
+ if (err)
+ error (3, err, "Can't get device master port");
+
+ /* Parse our arguments. */
+ argp_parse (&argp, argc, argv, 0, 0, 0);
+
+ exit (found_one ? 0 : 1);
+}