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| -rw-r--r-- | utils/devprobe.c | 104 |
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); +} |