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Annotation of freem/src/fma_locks.c, revision 1.3

1.1       snw         1: /*
                      2:  *                            *
                      3:  *                           * *
                      4:  *                          *   *
                      5:  *                     ***************
                      6:  *                      * *       * *
                      7:  *                       *  MUMPS  *
                      8:  *                      * *       * *
                      9:  *                     ***************
                     10:  *                          *   *
                     11:  *                           * *
                     12:  *                            *
                     13:  *
                     14:  *   fma_locks.c
                     15:  *    fmadm - locks
                     16:  *
                     17:  *  
1.3     ! snw        18:  *   Author: Serena Willis <snw@coherent-logic.com>
1.1       snw        19:  *    Copyright (C) 1998 MUG Deutschland
                     20:  *    Copyright (C) 2020 Coherent Logic Development LLC
                     21:  *
                     22:  *
                     23:  *   This file is part of FreeM.
                     24:  *
                     25:  *   FreeM is free software: you can redistribute it and/or modify
                     26:  *   it under the terms of the GNU Affero Public License as published by
                     27:  *   the Free Software Foundation, either version 3 of the License, or
                     28:  *   (at your option) any later version.
                     29:  *
                     30:  *   FreeM is distributed in the hope that it will be useful,
                     31:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
                     32:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     33:  *   GNU Affero Public License for more details.
                     34:  *
                     35:  *   You should have received a copy of the GNU Affero Public License
                     36:  *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
                     37:  *
                     38:  **/
                     39: 
                     40: #include <stdlib.h>
                     41: #include "config.h"
                     42: 
                     43: #if defined(HAVE_GETOPT_H)
                     44: # include <getopt.h>
                     45: #endif
                     46: 
                     47: #include "fmadm.h"
                     48: 
                     49: #include <stdio.h>
                     50: #include <sys/types.h>
                     51: #include <unistd.h>
                     52: #include <ctype.h>
                     53: #include <sys/stat.h>
                     54: #include <fcntl.h>
                     55: #include "locktab.h"
                     56: 
                     57: int unlock (char *locktab, long pid);
                     58: long int tell (int fd);
                     59: 
                     60: int fma_locks_list (int optc, char **opts)
                     61: {
                     62: 
                     63:     printf ("\nFreeM Lock Table\n");
                     64:     printf ("----------------\n\n");
                     65: 
                     66:     locktab_dump ();
                     67:     
                     68:     return 0;
                     69: } /* fma_locks_list() */
                     70: 
                     71: int fma_locks_remove (int optc, char **opts)
                     72: {
                     73: 
                     74:     int ct;
                     75:     int c;
                     76:     int option_index = 0;
                     77:     pid_t t_pid = 0;
                     78: 
                     79: #if defined(HAVE_GETOPT_LONG)
                     80: 
                     81:     struct option long_options[] = {        
                     82:         {"pid", required_argument, 0, 'p'},
                     83:         {0, 0, 0, 0}
                     84:     };
                     85: 
                     86: #endif
                     87: 
                     88: #if defined(HAVE_GETOPT_LONG)
                     89: 
                     90:     while(1) {
                     91:         
                     92:         c = getopt_long (optc, opts, "p:", long_options, &option_index);
                     93: 
                     94:         if (c == -1) break;
                     95: 
                     96:         switch (c) {
                     97: 
                     98:             case 'p':
                     99:                 t_pid = atol (optarg);
                    100:                 break;
                    101: 
                    102:         }
                    103:     }
                    104: 
                    105: 
                    106: 
                    107: 
                    108: #else
                    109: 
                    110: #endif
                    111: 
                    112:     if (t_pid == 0) {
                    113:         fprintf (stderr, "fmadm:  must supply -p or --pid argument\n");
                    114:         return 1;
                    115:     }
                    116: 
1.2       snw       117:     printf ("\nRemoving all LOCKs for PID %ld:\t", (long) t_pid);
1.1       snw       118: 
                    119:     ct = unlock (fma_locktab, t_pid);
                    120: 
                    121:     if (ct >= 0) {
                    122:         printf ("[%d MATCHES]\n\n", ct);
                    123:     }
                    124:     else {
                    125:         printf ("[ERROR]\n\n");
                    126:     }
                    127: 
                    128:     return ct >= 0 ? 0 : 1;
                    129: 
                    130: } /* fma_locks_remove() */
                    131: 
                    132: /* unLOCK all entries of pid */
                    133: int unlock (char *locktab, long n_pid)           
                    134: {
                    135:     pid_t old_pid = pid;
                    136:     pid = n_pid;
                    137:     
                    138: 
                    139:     if (locktab_get_sem () == TRUE) {
                    140: 
                    141:         locktab_unlock_all ();
                    142: 
                    143:         pid = old_pid;
                    144:         locktab_release_sem ();
                    145: 
                    146:         return 1;
                    147:     }
                    148:     else {
                    149:         fprintf (stderr, "fmadm:  could not acquire LOCK table semaphore\n");
                    150:         pid = old_pid;
                    151:         return 0;
                    152:     }
                    153: 
                    154:     pid = old_pid;
                    155:     return 0;
                    156: 
                    157: } /* lock() */