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Annotation of freem/src/fma_locks.c, revision 1.4

1.1       snw         1: /*
1.4     ! snw         2:  *   $Id$
1.1       snw         3:  *    fmadm - locks
                      4:  *
                      5:  *  
1.3       snw         6:  *   Author: Serena Willis <snw@coherent-logic.com>
1.1       snw         7:  *    Copyright (C) 1998 MUG Deutschland
1.4     ! snw         8:  *    Copyright (C) 2020, 2025 Coherent Logic Development LLC
1.1       snw         9:  *
                     10:  *
                     11:  *   This file is part of FreeM.
                     12:  *
                     13:  *   FreeM is free software: you can redistribute it and/or modify
                     14:  *   it under the terms of the GNU Affero Public License as published by
                     15:  *   the Free Software Foundation, either version 3 of the License, or
                     16:  *   (at your option) any later version.
                     17:  *
                     18:  *   FreeM is distributed in the hope that it will be useful,
                     19:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
                     20:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     21:  *   GNU Affero Public License for more details.
                     22:  *
                     23:  *   You should have received a copy of the GNU Affero Public License
                     24:  *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
                     25:  *
1.4     ! snw        26:  *   $Log$
        !            27:  *
        !            28:  * SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
        !            29:  * SPDX-License-Identifier: AGPL-3.0-or-later 
1.1       snw        30:  **/
                     31: 
                     32: #include <stdlib.h>
                     33: #include "config.h"
                     34: 
                     35: #if defined(HAVE_GETOPT_H)
                     36: # include <getopt.h>
                     37: #endif
                     38: 
                     39: #include "fmadm.h"
                     40: 
                     41: #include <stdio.h>
                     42: #include <sys/types.h>
                     43: #include <unistd.h>
                     44: #include <ctype.h>
                     45: #include <sys/stat.h>
                     46: #include <fcntl.h>
                     47: #include "locktab.h"
                     48: 
                     49: int unlock (char *locktab, long pid);
                     50: long int tell (int fd);
                     51: 
                     52: int fma_locks_list (int optc, char **opts)
                     53: {
                     54: 
                     55:     printf ("\nFreeM Lock Table\n");
                     56:     printf ("----------------\n\n");
                     57: 
                     58:     locktab_dump ();
                     59:     
                     60:     return 0;
                     61: } /* fma_locks_list() */
                     62: 
                     63: int fma_locks_remove (int optc, char **opts)
                     64: {
                     65: 
                     66:     int ct;
                     67:     int c;
                     68:     int option_index = 0;
                     69:     pid_t t_pid = 0;
                     70: 
                     71: #if defined(HAVE_GETOPT_LONG)
                     72: 
                     73:     struct option long_options[] = {        
                     74:         {"pid", required_argument, 0, 'p'},
                     75:         {0, 0, 0, 0}
                     76:     };
                     77: 
                     78: #endif
                     79: 
                     80: #if defined(HAVE_GETOPT_LONG)
                     81: 
                     82:     while(1) {
                     83:         
                     84:         c = getopt_long (optc, opts, "p:", long_options, &option_index);
                     85: 
                     86:         if (c == -1) break;
                     87: 
                     88:         switch (c) {
                     89: 
                     90:             case 'p':
                     91:                 t_pid = atol (optarg);
                     92:                 break;
                     93: 
                     94:         }
                     95:     }
                     96: 
                     97: 
                     98: 
                     99: 
                    100: #else
                    101: 
                    102: #endif
                    103: 
                    104:     if (t_pid == 0) {
                    105:         fprintf (stderr, "fmadm:  must supply -p or --pid argument\n");
                    106:         return 1;
                    107:     }
                    108: 
1.2       snw       109:     printf ("\nRemoving all LOCKs for PID %ld:\t", (long) t_pid);
1.1       snw       110: 
                    111:     ct = unlock (fma_locktab, t_pid);
                    112: 
                    113:     if (ct >= 0) {
                    114:         printf ("[%d MATCHES]\n\n", ct);
                    115:     }
                    116:     else {
                    117:         printf ("[ERROR]\n\n");
                    118:     }
                    119: 
                    120:     return ct >= 0 ? 0 : 1;
                    121: 
                    122: } /* fma_locks_remove() */
                    123: 
                    124: /* unLOCK all entries of pid */
                    125: int unlock (char *locktab, long n_pid)           
                    126: {
                    127:     pid_t old_pid = pid;
                    128:     pid = n_pid;
                    129:     
                    130: 
                    131:     if (locktab_get_sem () == TRUE) {
                    132: 
                    133:         locktab_unlock_all ();
                    134: 
                    135:         pid = old_pid;
                    136:         locktab_release_sem ();
                    137: 
                    138:         return 1;
                    139:     }
                    140:     else {
                    141:         fprintf (stderr, "fmadm:  could not acquire LOCK table semaphore\n");
                    142:         pid = old_pid;
                    143:         return 0;
                    144:     }
                    145: 
                    146:     pid = old_pid;
                    147:     return 0;
                    148: 
                    149: } /* lock() */