tools/tesh2/examples/background.tesh

   1
   2 $ rm -rf temp_testdir
   3 $ mkdir temp_testdir
   4 $ cd temp_testdir
   5
   6 < #include <unistd.h>
   7 < #include <stdlib.h>
   8 < #include <stdio.h>
   9 < #include <sys/types.h>
  10 < #include <sys/stat.h>
  11 < #include <fcntl.h>
  12 <
  13 < #ifdef __MINGW32__
  14 < #define sleep _sleep
  15 < #endif
  16 <
  17 < int main() {
  18 <       char buff[2048];
  19 <       char* p;
  20 <       int got;
  21 <       int in;
  22 <       int w;
  23 <       int tgot = 0;
  24 <
  25 <       sleep(1);
  26 <
  27 <       if((in = open("tmp_fich",O_RDONLY|O_CREAT)) == -1){
  28 <               perror("Cannot open tmp_fich");
  29 <               exit(1);
  30 <       }
  31 <
  32 <       while (1) {
  33 <               if((got = read(in,&buff,2048)) == -1)
  34 <                       perror("Error while reading");
  35 <               else if(got == 0 && tgot != 0)
  36 <                       break; /* EOF */
  37 <
  38 <               if(!got)
  39 <                       continue;
  40 <
  41 <               p = buff;
  42 <
  43 <               tgot += got;
  44 <
  45 <               while(got) {
  46 <                       if((w = write(1, p , got)) < 0) {
  47 <                               perror("Error while writing");
  48 <                               exit(1);
  49 <                       }
  50 <
  51 <                       p += w;
  52 <                       got -= w;
  53 <               }
  54 <       }
  55 <
  56 <       return 0;
  57 < }
  58 $ cat > delayed_cat.c
  59
  60 $ gcc -Wall -o delayed_cat delayed_cat.c
  61
  62 & ./delayed_cat
  63 > TOTO
  64
  65 < TOTO
  66 $ cat > tmp_fich
  67
  68 $ sleep 2
  69 $ cd ..
  70 $ rm -rf temp_testdir
  71