git.scottworley.com Git - tl-append/blob - tl-append-test.c

   1 #define _POSIX_C_SOURCE 2
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 static void die(const char *message) {
   7   fputs(message, stderr);
   8   fputc('\n', stderr);
   9   exit(1);
  10 }
  11
  12 static void die_err(const char *message) {
  13   perror(message);
  14   exit(1);
  15 }
  16
  17 static void write_to_tl_append(const char *content) {
  18   FILE *p = popen("./tl-append", "w");
  19   if (p == NULL)
  20     die_err("Couldn't run tl-append");
  21   if (fputs(content, p) == EOF)
  22     die("Couldn't write to pipe");
  23   int status = pclose(p);
  24   if (status < 0)
  25     die_err("Error closing pipe");
  26   if (status != 0)
  27     die("tl-append exited abnormally");
  28 }
  29
  30 static void verify_log_contents(const char *contents) {
  31   char buf[10];
  32
  33   FILE *f = fopen("tl.log", "r");
  34   if (f == NULL)
  35     die_err("Error opening log file");
  36   if (fgets(buf, sizeof(buf), f) == NULL)
  37     die("Error reading log file");
  38   if (strncmp(contents, buf, sizeof(buf)) != 0)
  39     die("Wrong contents in log file");
  40   if (fclose(f) != 0)
  41     die_err("Error closing log file");
  42 }
  43
  44 static void write_and_read_line() {
  45   write_to_tl_append("foo\n");
  46   verify_log_contents("foo\n");
  47 }
  48
  49 int main() { write_and_read_line(); }