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

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 #include "common.h"
   5
   6 const size_t BUF_SIZE = 1024;
   7
   8 static void read_line(char *buf) {
   9   if (fgets(buf, BUF_SIZE, stdin) == NULL) {
  10     if (ferror(stdin))
  11       die("I/O error reading line");
  12     if (feof(stdin)) {
  13       buf[0] = '\0'; /* Unclear if fgets does this already */
  14       return;
  15     }
  16     die("Unexpected error reading line");
  17   }
  18 }
  19
  20 static void write_line(const char *line) {
  21   const char *now = encode_time(time(NULL));
  22   FILE *f = fopen(FILENAME, "a");
  23   if (f == NULL)
  24     die_err("Error opening output file");
  25   if (fputs(now, f) == EOF)
  26     die("Error writing to output file");
  27   if (fputc(' ', f) == EOF)
  28     die("Error writing to output file");
  29   if (fputs(line, f) == EOF)
  30     die("Error writing to output file");
  31   if (fclose(f) != 0)
  32     die_err("Error closing output file");
  33 }
  34
  35 int main() {
  36   char buf[BUF_SIZE];
  37   for (read_line(buf); buf[0]; read_line(buf)) {
  38     write_line(buf);
  39   }
  40   return 0;
  41 }