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znol.c

/* This file is part of the Project Athena Zephyr Notification System.
 * It contains code for the "znol" command.
 *
 *    Created by: Robert French
 *
 *    $Id: znol.c,v 1.17 2000/05/08 15:59:05 ghudson Exp $
 *
 *    Copyright (c) 1987 by the Massachusetts Institute of Technology.
 *    For copying and distribution information, see the file
 *    "mit-copyright.h". 
 */

#include <sysdep.h>
#include <zephyr/zephyr.h>

#include <pwd.h>

#ifndef lint
static const char rcsid_znol_c[] = "$Id: znol.c,v 1.17 2000/05/08 15:59:05 ghudson Exp $";
#endif 

#define SUBSATONCE 7
#define ON 1
#define OFF 0

main(argc,argv)
      int argc;
      register char *argv[];
{
      register char *cp;
      ZSubscription_t subs[SUBSATONCE];
      ZLocations_t locations;
      FILE *fp;
      struct passwd *pwd;
      char anyonename[BUFSIZ],name[BUFSIZ],cleanname[BUFSIZ],*envptr;
      char *comment_ptr;
      int onoff = ON,quiet = 0,justlist = 0,useronly = 0, filenamed = 0;
      int retval,arg,ind,one,numlocs,i;
      int wgport;

      if ((retval = ZInitialize()) != ZERR_NONE) {
            com_err(argv[0],retval,"initializing");
            exit (1);
      }

      for (arg=1;arg<argc;arg++) {
            if (!strcmp(argv[arg],"on")) {
                  onoff = ON;
                  continue;
            }
            if (!strcmp(argv[arg],"off")) {
                  onoff = OFF;
                  continue;
            } 
            if (argv[arg][0] == '-') {
                  char opt = argv[arg][1];
                  if (opt == 0 || argv[arg][2] != 0)
                        goto usage;
                  switch (argv[arg][1]) {
                  case 'q':
                        quiet = 1;
                        break;
                  case 'l':
                        justlist = 1;
                        break;
                  case 'f':
                        if (arg == argc-1) {
                              fprintf(stderr,"No file name specified\n");
                              goto usage;
                        }
                        (void) strcpy(anyonename,argv[++arg]);
                        filenamed = 1;
                        break;
                  case 'u':
                        if (arg == argc-1) {
                              fprintf(stderr,"No username specified\n");
                              goto usage;
                        }
                        (void) strcpy(cleanname,argv[++arg]);
                        useronly = 1;
                        break;
                  default:
                        goto usage;
                  }
                  continue;
            }
          usage:
            fprintf(stderr,"Usage: %s [on|off] [-q | -l] [-f file | -u username]\n", argv[0]);
            exit (1);
      }

      if (quiet && justlist) {
            fprintf(stderr,"-q and -l cannot both be used\n");
            goto usage;
      } 
      if (useronly && filenamed) {
            fprintf(stderr,"-u and -f cannot both be used\n");
            goto usage;
      } 
      if (!justlist)
            if ((wgport = ZGetWGPort()) == -1) {
                  com_err(argv[0],errno,"while getting WindowGram port");
                  exit(1);
            }
      
      if (!useronly) {
            /* If no filename specified, get the default */
            if (!filenamed) {
                  envptr = getenv("HOME");
                  if (envptr)
                      (void) strcpy(anyonename,envptr);
                  else {
                        if (!(pwd = getpwuid((int) getuid()))) {
                              fprintf(stderr,"You are not listed in the password file.\n");
                              exit (1);
                        }
                        (void) strcpy(anyonename,pwd->pw_dir);
                  }
                  (void) strcat(anyonename,"/.anyone");
            }

            /* if the filename is "-", read stdin */
            if (strcmp(anyonename,"-") == 0) {
                  fp = stdin;
            } else if (!(fp = fopen(anyonename,"r"))) {
                  fprintf(stderr,"Can't open %s for input\n",anyonename);
                  exit (1);
            }
      }

      ind = 0;
      
      for (;;) {
            if (!useronly) {
                if (!fgets(cleanname,sizeof cleanname,fp))
                  break;
                if (cleanname[0] == '#' || cleanname[0] == '\0' ||
                  cleanname[0] == '\n')
                  continue;   /* ignore comment and empty lines */
                if (comment_ptr = strchr(cleanname, '#'))
                  *comment_ptr = '\0'; /* Ignore from # onwards */
                /* Get rid of old-style nol entries, just in case */
                cp = cleanname + strlen(cleanname) - 1;
                *cp = '\0';
                while(*--cp == ' ')
                  *cp = '\0';
                if (*cleanname == '@' || !*cleanname)
                  continue;
            } else if (ind)
                break;        /* only do the one name */

            subs[ind].zsub_class = LOGIN_CLASS;
            (void) strcpy(name,cleanname);
            if (!strchr(name,'@')) {
                  cp = name + strlen(name);
                  *cp++ = '@';
                  (void) strcpy(cp,ZGetRealm());
            }
            if ((subs[ind].zsub_classinst = malloc((unsigned)(strlen(name)+1))) == NULL) {
                  fprintf (stderr, "znol: out of memory");
                  exit (1);
            }
            (void) strcpy(subs[ind].zsub_classinst, name);
            subs[ind++].zsub_recipient = "";

            if (!quiet && onoff == ON) {
                  if ((retval = ZLocateUser(name,&numlocs,ZAUTH))
                      != ZERR_NONE) {
                        com_err(argv[0],retval,"locating user");
                        exit(1);
                  }
                  one = 1;
                  if (numlocs) {
                        for (i=0;i<numlocs;i++) {
                              if ((retval =
                                   ZGetLocations(&locations,&one))
                                  != ZERR_NONE) {
                                    com_err(argv[0],retval,
                                          "getting location");
                                    continue;
                              }
                              if (one != 1) {
                                    printf("%s: internal failure while getting location\n",argv[0]);
                                    exit(1);
                              }
                              printf("%s: %s\t%s\t%s\n",cleanname,
                                     locations.host,
                                     locations.tty,
                                     locations.time);
                        }
                  }
            }
            
            if (ind == SUBSATONCE) {
                  if (!justlist)
                        if ((retval = (onoff==ON)?
                             ZSubscribeToSansDefaults(subs,ind,
                                                (u_short)wgport):
                             ZUnsubscribeTo(subs,ind,(u_short)wgport)) !=
                            ZERR_NONE) {
                              com_err(argv[0],retval,(onoff==ON)?
                                    "subscribing":
                                    "unsubscribing");
                              exit(1);
                        } 
                  for (ind=0;ind<SUBSATONCE;ind++)
                        free(subs[ind].zsub_classinst);
                  ind = 0;
            }
      }

      if (ind && !justlist)
            if ((retval = (onoff==ON)?
                 ZSubscribeToSansDefaults(subs,ind,(u_short)wgport):
                 ZUnsubscribeTo(subs,ind,(u_short)wgport)) !=
                ZERR_NONE) {
                  com_err(argv[0],retval,(onoff==ON)?
                        "subscribing":
                        "unsubscribing");
                  exit(1);
            } 

      if (!useronly)
          (void) fclose(fp);        /* file is open read-only,
                                 ignore errs */
      exit(0);
}

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