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Diffstat (limited to 'utils/settrans.c')
| -rw-r--r-- | utils/settrans.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/utils/settrans.c b/utils/settrans.c new file mode 100644 index 00000000..e5f79847 --- /dev/null +++ b/utils/settrans.c @@ -0,0 +1,180 @@ +/* Set a file's translator. + + Copyright (C) 1995 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 <hurd.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <fcntl.h> +#include <unistd.h> + +#include <error.h> +#include <argz.h> +#include <start-trans.h> + +/* ---------------------------------------------------------------- */ + +#define USAGE "Usage: %s [OPTION...] FILE [TRANSLATOR...]\n" + +static void +usage(status) + int status; +{ + if (status != 0) + fprintf(stderr, "Try `%s --help' for more information.\n", + program_invocation_name); + else + { + printf(USAGE, program_invocation_name); + printf("\ +\n\ + -a, --active Set FILE's active translator\n\ + -p, --passive Set FILE's passive translator\n\ + -c, --create Create FILE if it doesn't exist\n\ + -f, --force Set the translator even if one already exists\n\ + -k, --keep-active Keep any currently running active translator\n\ + when setting the passive translator\n\ + -L, --dereference If a translator exists, put the new one on top\n\ + -t, --list Show FILE's passive translator\n\ + --help Give this help list\n\ +"); + } + + exit(status); +} + +#define SHORT_OPTIONS "apcfkLt?" + +static struct option options[] = +{ + {"active", no_argument, 0, 'a'}, + {"passive", no_argument, 0, 'p'}, + {"keep-active", no_argument, 0, 'k'}, + {"create", no_argument, 0, 'c'}, + {"force", no_argument, 0, 'f'}, + {"dereference", no_argument, 0, 'L'}, + {"list", no_argument, 0, 't'}, + {"help", no_argument, 0, '?'}, + {0, 0, 0, 0} +}; + +/* ---------------------------------------------------------------- */ + +void +main(int argc, char *argv[]) +{ + int opt; + error_t err; + + /* The filesystem node we're putting a translator on. */ + char *node_name; + file_t node; + + /* The translator's arg vector, in '\0' separated format. */ + char *argz = 0; + int argz_len = 0; + + /* The control port for any active translator we start up. */ + fsys_t active_control = MACH_PORT_NULL; + + /* Flags to pass to file_set_translator. By default we only set a + translator if there's no existing one. */ + int flags = FS_TRANS_SET | FS_TRANS_EXCL; + + /* Various option flags. */ + int passive = 0, active = 0, create = 0, force = 0, deref = 0, list = 0; + int keep_active = 0; + + /* Parse our options... */ + while ((opt = getopt_long(argc, argv, "+" SHORT_OPTIONS, options, 0)) != EOF) + switch (opt) + { + case 'a': active = 1; break; + case 'p': passive = 1; break; + case 'f': force = 1; break; + case 'k': keep_active = 1; break; + case 'c': create = 1; break; + case 'L': deref = 1; break; + case 't': list = 1; break; + case '?': usage(0); + default: usage(1); + } + + if (optind == argc) + { + fprintf(stderr, + "%s: Missing filename argument\n", program_invocation_name); + usage(1); + } + + node_name = argv[optind++]; + + if (!active && !passive) + passive = 1; + + node = + file_name_lookup(node_name, + (deref ? 0 : O_NOTRANS) | (create ? O_CREAT : 0), + 0666); + if (node == MACH_PORT_NULL) + error(1, errno, "%s", node_name); + + if (list) + /* Print out NODE's translator instead of setting it. */ + { + char buf[1024], *trans = buf; + int len = sizeof(buf); + + err = file_get_translator(node, &trans, &len); + if (err) + error(2, err, "%s", node_name); + + argz_stringify(trans, len); + printf("%s\n", trans); + } + else + { + err = argz_create(argv + optind, &argz, &argz_len); + if (err) + error(3, err, "Can't create argz vector"); + + if (active && argz_len > 0) + err = start_translator(node, argz, argz_len, 60000, &active_control); + if (err) + error(4, err, "%s", argz); + + if (force) + /* Kill any existing translators. */ + flags &= ~FS_TRANS_EXCL; + + err = + file_set_translator(node, + passive ? flags : 0, + (active || !keep_active) ? flags : 0, + 0, + argz, argz_len, + active_control, MACH_MSG_TYPE_MOVE_SEND); + if (err) + error(5, err, "%s", node_name); + } + + exit(0); +} |