4.3BSD - /usr/src/new/rcs/src/snoop.c

   1: /*
   2:  *                     Logging of RCS commands co and ci
   3:  */
   4:  static char rcsid[]=
   5:  "$Header: /usr/wft/RCS/SRC/RCS/snoop.c,v 3.2 82/12/04 17:14:31 wft Exp $ Purdue CS";
   6: /*******************************************************************
   7:  * This program appends argv[1] to the file SNOOPFILE.
   8:  * To avoid overlaps, it creates a lockfile with name lock in the same
   9:  * directory as SNOOPFILE. SNOOPFILE must be defined in the cc command.
  10:  * Prints an error message if lockfile doesn't get deleted after
  11:  * MAXTRIES tries.
  12:  *******************************************************************
  13:  *
  14:  * Copyright (C) 1982 by Walter F. Tichy
  15:  *                       Purdue University
  16:  *                       Computer Science Department
  17:  *                       West Lafayette, IN 47907
  18:  *
  19:  * All rights reserved. No part of this software may be sold or distributed
  20:  * in any form or by any means without the prior written permission of the
  21:  * author.
  22:  * Report problems and direct all inquiries to Tichy@purdue (ARPA net).
  23:  */
  24: 
  25: 
  26: /* $Log:	snoop.c,v $
  27:  * Revision 3.2  82/12/04  17:14:31  wft
  28:  * Added rcsbase.h, changed SNOOPDIR to SNOOPFILE, reintroduced
  29:  * error message in case of permanent locking.
  30:  *
  31:  * Revision 3.1  82/10/18  21:22:03  wft
  32:  * Number of polls now 20, no error message if critical section can't
  33:  * be entered.
  34:  *
  35:  * Revision 2.3  82/07/01  23:49:28  wft
  36:  * changed copyright notice only.
  37:  *
  38:  * Revision 2.2  82/06/03  20:00:10  wft
  39:  * changed name from rcslog to snoop, replaced LOGDIR with SNOOPDIR.
  40:  *
  41:  * Revision 2.1  82/05/06  17:55:54  wft
  42:  * Initial revision
  43:  *
  44:  */
  45: 
  46: 
  47: #include "rcsbase.h"
  48: #define fflsbuf _flsbuf
  49: /* undo redefinition of putc in rcsbase.h */
  50: 
  51: char  lockfname[NCPPN];
  52: FILE * logfile;
  53: int lockfile;
  54: 
  55: #define MAXTRIES 20
  56: 
  57: main(argc,argv)
  58: int argc; char * argv[];
  59: /* writes argv[1] to SNOOPFILE and appends a newline. Invoked as follows:
  60:  * rcslog logmessage
  61:  */
  62: {       int tries;
  63:         register char * lastslash, *sp;
  64: 
  65:         strcpy(lockfname,SNOOPFILE);
  66:         lastslash = sp = lockfname;
  67:         while (*sp) if (*sp++ =='/') lastslash=sp; /* points beyond / */
  68:         strcpy(lastslash,",lockfile");
  69:         tries=0;
  70:         while (((lockfile=creat(lockfname, 000)) == -1) && (tries<=MAXTRIES)) {
  71:                 tries++;
  72:                 sleep(5);
  73:         }
  74:         if (tries<=MAXTRIES) {
  75:                 close(lockfile);
  76:                 if ((logfile=fopen(SNOOPFILE,"a")) ==NULL) {
  77:                         fprintf(stderr,"Can't open logfile %s\n",SNOOPFILE);
  78:                 } else {
  79:                         fputs(argv[1],logfile);
  80:                         putc('\n',logfile);
  81:                         fclose(logfile);
  82:                 }
  83:                 unlink(lockfname);
  84:         } else {
  85:                 fprintf(stderr,"RCS logfile %s seems permanently locked.\n",SNOOPFILE);
  86:                 fprintf(stderr,"Please alert system administrator\n");
  87:         }
  88: }

Defined functions

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Defined macros