axcalluser.c

/* axcalluser.c - determine username corresponding to callsign */
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <errno.h>
#include "config.h"
#include "axcalluser.h"

int axcalluserid(char *call)
{
  char callsign[10];
  char username[80];
  int id;
  int userid = -1;
  FILE *f = fopen(PROC_AX25_CALLS_FILE,"r");
  if (f) {                                     /* VE3TOK, 18Nov2014, return value usage */
    if (fgets(username,79,f) == NULL) {
       syslog(LOG_DEBUG, "Can't get username: %s", strerror(errno));
       return 1;
    }
    while (fscanf(f," %d %9s",&id,callsign) != EOF) {
      char *a,*b;
      for (a=call,b=callsign;
	   *a && *b && toupper(*a)==toupper(*b) && *b!='-';
	   a++,b++) ;
      if (!isalnum(*a) && !isalnum(*b)) {
	userid = id;
      }
    }

  }
  fclose(f);
  return userid;
}
char *getusername(int userid)
{
  int colons;
  int c,i;
  char token[80];
  static char name[80];
  char *retval = NULL;
  FILE *f;
  f = fopen("/etc/passwd","r");
  if (f) {
    i = 0;
    colons = 0;
    while ((c = getc(f)) != EOF) {
      switch (c) {
      case ':':
	token[i] = '\0';
	colons++;
	if (colons == 3) {
	  if (userid == atoi(token)) {
	    retval = name;
	    goto endloop;
	  }
	} else if (colons == 1) {
	  strcpy(name,token);
	}
	i = 0;
	break;
      case '\n':
	colons = 0;
	i = 0;
	break;
      default:
	token[i++] = c;
	break;
      }
    }
  endloop:
    fclose(f);
  }
  return retval;
}