test/src/mtpscript.c

   1 /* A little hacked up program that allows a script to play the part of a remote
   2 SMTP/LMTP server on stdin/stdout for testing purposes. Hacked from the more
   3 complicated version that does it over a socket. */
   4
   5
   6 /* ANSI C standard includes */
   7
   8 #include <ctype.h>
   9 #include <signal.h>
  10 #include <stdarg.h>
  11 #include <stddef.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <time.h>
  16
  17 /* Unix includes */
  18
  19 #include <errno.h>
  20 #include <unistd.h>
  21
  22 #ifndef CS
  23 # define CS (char *)
  24 #endif
  25
  26
  27 static FILE *log;
  28
  29
  30 /*************************************************
  31 *            SIGALRM handler - crash out         *
  32 *************************************************/
  33
  34 static void
  35 sigalrm_handler(int sig)
  36 {
  37 sig = sig;    /* Keep picky compilers happy */
  38 fprintf(log, "Server timed out\n");
  39 exit(99);
  40 }
  41
  42
  43
  44 /*************************************************
  45 *                 Main Program                   *
  46 *************************************************/
  47
  48 int main(int argc, char **argv)
  49 {
  50 char *logfile;
  51 char *logmode = "w";
  52 FILE *script;
  53 unsigned char sbuffer[1024];
  54 unsigned char ibuffer[1024];
  55
  56 if (argc < 3)
  57   {
  58   fprintf(stdout, "500 Script and log file required\n");
  59   exit(1);
  60   }
  61
  62 /* Get the script and log open */
  63
  64 script = fopen(argv[1], "r");
  65 if (script == NULL)
  66   {
  67   fprintf(stdout, "500 Failed to open script %s: %s\r\n", argv[1],
  68     strerror(errno));
  69   exit(1);
  70   }
  71
  72 logfile = argv[2];
  73 if (logfile[0] == '+')
  74   {
  75   logfile++;
  76   logmode = "a";
  77   }
  78
  79 log = fopen(logfile, logmode);
  80 if (log == NULL)
  81   {
  82   fprintf(stdout, "500 Failed to open log %s: %s\r\n", logfile,
  83     strerror(errno));
  84   exit(1);
  85   }
  86
  87 /* SIGALRM handler crashes out */
  88
  89 signal(SIGALRM, sigalrm_handler);
  90
  91 /* Read the script, and do what it says. */
  92
  93 while (fgets(CS sbuffer, sizeof(sbuffer), script) != NULL)
  94   {
  95   int n = (int)strlen(CS sbuffer);
  96   while (n > 0 && isspace(sbuffer[n-1])) n--;
  97   sbuffer[n] = 0;
  98
  99   /* If the script line starts with a digit, it is a response line which
 100   we are to send. */
 101
 102   if (isdigit(sbuffer[0]))
 103     {
 104     fprintf(log, "%s\n", sbuffer);
 105     fflush(log);
 106     fprintf(stdout, "%s\r\n", sbuffer);
 107     fflush(stdout);
 108     }
 109
 110   /* If the script line starts with "*sleep" we just sleep for a while
 111   before continuing. Do not write this to the log, as it may not get
 112   written at the right place in a log that's being shared. */
 113
 114   else if (strncmp(CS sbuffer, "*sleep ", 7) == 0)
 115     {
 116     sleep(atoi(CS sbuffer+7));
 117     }
 118
 119   /* Otherwise the script line is the start of an input line we are expecting
 120   from the client, or "*eof" indicating we expect the client to close the
 121   connection. Read command line or data lines; the latter are indicated
 122   by the expected line being just ".". */
 123
 124   else
 125     {
 126     int data = strcmp(CS sbuffer, ".") == 0;
 127
 128     fprintf(log, "%s\n", sbuffer);
 129     fflush(log);
 130
 131     /* Loop for multiple data lines */
 132
 133     for (;;)
 134       {
 135       int n;
 136       alarm(5);
 137       if (fgets(CS ibuffer, sizeof(ibuffer), stdin) == NULL)
 138         {
 139         fprintf(log, "%sxpected EOF read from client\n",
 140           (strncmp(CS sbuffer, "*eof", 4) == 0)? "E" : "Une");
 141         goto END_OFF;
 142         }
 143       alarm(0);
 144       n = (int)strlen(CS ibuffer);
 145       while (n > 0 && isspace(ibuffer[n-1])) n--;
 146       ibuffer[n] = 0;
 147       fprintf(log, "<<< %s\n", ibuffer);
 148       if (!data || strcmp(CS ibuffer, ".") == 0) break;
 149       }
 150
 151     /* Check received what was expected */
 152
 153     if (strncmp(CS sbuffer, CS ibuffer, (int)strlen(CS sbuffer)) != 0)
 154       {
 155       fprintf(log, "Comparison failed - bailing out\n");
 156       goto END_OFF;
 157       }
 158     }
 159   }
 160
 161 /* This could appear in the wrong place in a shared log, so forgo it. */
 162 /* fprintf(log, "End of script\n"); */
 163
 164 END_OFF:
 165 fclose(script);
 166 fclose(log);
 167
 168 exit(0);
 169 }
 170
 171 /* End of mtpscript.c */