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- Committer: Bazaar Package Importer
- Author(s): Rob Browning
- Date: 2001-07-17 12:38:34 UTC
- Revision ID: james.westby@ubuntu.com-20010717123834-brt4d52ox8xhx81e
Tags: 0.1.9
* Add command tool names to manpages. (closes: #88510)
* Update my email address.
* Update my email address.
- files added:
- .bzr-builddeb
- debian
added
removed
lockfile-progs.c
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/* lockfile-progs.c
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Copyright 1998 Rob Browning <rlb@defaultvalue.org>
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This code is covered under the terms of the Gnu Public License.
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See the accompanying COPYING file for details.
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To do:
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It might be useful at some point to support a --user option to
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mail-lock that can only be used by the superuser (of course, they
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could just use lockfile-create with an appropriate path...
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*/
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#define _GNU_SOURCE
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#include <lockfile.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <signal.h>
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#include <string.h>
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#include <getopt.h>
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#include <pwd.h>
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#include <sys/types.h>
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static const char *action = NULL;
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static char *target_file = NULL;
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static int retry_count = 9; /* This will be a maximum of 3 minutes */
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static int touchlock_oneshot = 0;
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/* not used yet, so not documented... */
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static int lockfile_verbose = 0;
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static int result = 0;
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static void
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usage(const char *command_name, FILE *file) {
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char *usage_str = NULL;
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if(strcmp(command_name, "mail-lock") == 0) {
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usage_str = "usage: mail-lock [ --retry retry-count ]\n";
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} else if(strcmp(command_name, "mail-unlock") == 0) {
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usage_str = "usage: mail-unlock\n";
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} else if(strcmp(command_name, "mail-touchlock") == 0) {
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usage_str = "usage: mail-touchlock [ --oneshot ]\n";
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} else if(strcmp(command_name, "lockfile-create") == 0) {
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usage_str = "usage: lockfile-create [ --retry retry-count ] file\n";
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} else if(strcmp(command_name, "lockfile-remove") == 0) {
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usage_str = "usage: lockfile-remove file\n";
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} else if(strcmp(command_name, "lockfile-touch") == 0) {
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usage_str = "usage: lockfile-touch [ --oneshot ] file\n";
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} else {
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fprintf(stderr, "lockfile: big problem unknown command name: %s\n",
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command_name);
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exit(1);
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}
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fprintf(file, usage_str);
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}
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static void
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parse_arguments(const int argc, char *argv[]) {
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int opt_result;
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struct option opt_specs[] = {
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{ "retry", required_argument, NULL, 'r' },
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{ "oneshot", no_argument, NULL, 'o' },
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//{ "verbose", no_argument, NULL, 'v' },
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{ NULL, 0, NULL, 0 }
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};
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char *cmd_name = rindex(argv[0], '/');
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int mail_cmd_p = 0;
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if(cmd_name != NULL) {
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/* Skip the '/' */
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cmd_name++;
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} else {
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cmd_name = argv[0];
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}
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while((opt_result = getopt_long(argc, argv, "", opt_specs, NULL)) != -1) {
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switch(opt_result) {
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case 'o':
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touchlock_oneshot = 1;
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break;
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case 'v':
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lockfile_verbose = 1;
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break;
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case 'r':
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{
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char *rest_of_string;
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long tmp_value = strtol(optarg, &rest_of_string, 10);
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if((tmp_value == 0) && (rest_of_string == optarg)) {
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/* Bad value */
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fprintf(stderr, "%s: bad retry-count value\n", cmd_name);
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usage(cmd_name, stderr);
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exit(1);
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} else {
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retry_count = tmp_value;
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}
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}
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break;
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default:
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fprintf(stderr, "%s: getopt returned impossible value 0%o.\n",
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cmd_name, opt_result);
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exit(1);
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break;
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}
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}
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if(strcmp(cmd_name, "mail-lock") == 0) {
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action = "lock";
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mail_cmd_p = 1;
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}
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else if(strcmp(cmd_name, "mail-unlock") == 0) {
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action = "unlock";
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mail_cmd_p = 1;
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}
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else if(strcmp(cmd_name, "mail-touchlock") == 0) {
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action = "touch";
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mail_cmd_p = 1;
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}
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else if(strcmp(cmd_name, "lockfile-create") == 0) {
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action = "lock";
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}
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else if(strcmp(cmd_name, "lockfile-remove") == 0) {
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action = "unlock";
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}
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else if(strcmp(cmd_name, "lockfile-touch") == 0) {
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action = "touch";
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} else {
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usage(cmd_name, stderr);
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exit(1);
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}
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if(mail_cmd_p) {
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if(optind == argc) {
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uid_t user_id = geteuid();
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struct passwd *user_info = getpwuid(user_id);
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if(user_info == NULL) {
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fprintf(stderr, "%s: fatal error, can't find info for user id %ud\n",
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cmd_name, user_id);
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exit(1);
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}
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if(asprintf(&target_file, "/var/spool/mail/%s",
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user_info->pw_name) == -1) {
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fprintf(stderr, "asprintf failed: line %d\n", __LINE__);
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exit(1);
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}
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} else {
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usage(cmd_name, stderr);
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exit(1);
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}
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} else {
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if((argc - optind) != 1) {
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usage(cmd_name, stderr);
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exit(1);
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}
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target_file = argv[optind];
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}
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}
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static void
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handle_touchdeath(int sig) {
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exit(result);
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}
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int
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main(int argc, char *argv[]) {
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char * lockfilename = NULL;
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parse_arguments(argc, argv);
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if(asprintf(&lockfilename, "%s.lock", target_file) == -1) {
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fprintf(stderr, "asprintf failed: line %d\n", __LINE__);
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exit(1);
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}
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if(strcmp(action, "unlock") == 0) {
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result = lockfile_remove(lockfilename);
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} else if(strcmp(action, "lock") == 0) {
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if(lockfile_create(lockfilename, retry_count, 0) == L_SUCCESS) {
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result = 0;
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} else {
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fprintf(stderr, "lockfile creation failed\n");
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result = 1;
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}
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} else if(strcmp(action, "touch") == 0) {
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signal(SIGTERM, handle_touchdeath);
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if(touchlock_oneshot) {
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result = lockfile_touch(lockfilename);
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} else {
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while(1 && (result == 0)) {
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result = lockfile_touch(lockfilename);
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sleep(60);
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}
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}
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}
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if(lockfilename) free(lockfilename);
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return(result);
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}
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