src/minish-read.c

   1 #define _POSIX_C_SOURCE 200809L
   2 #include <errno.h> // errno
   3 #include <locale.h> // LC_ALL,setlocale
   4 #include <stdio.h> /*
   5 * EOF,NULL,ferror,fprintf,getchar,perror,putchar,stderr,stdin
   6 */
   7
   8 int main(int argc, char** argv) {
   9         char const* const name = argv[0] ? argv[0] : "minish-read";
  10         char const* const file = argc ? argv[1] : NULL;
  11         setlocale(LC_ALL, "");
  12         for (;;) {
  13                 int const c = getchar();
  14                 switch (c) {
  15                 case EOF:
  16                         if (ferror(stdin)) {
  17                                 int const tmp = errno;
  18                                 fprintf(stderr, "%s: ", name);
  19                                 errno = tmp;
  20                                 perror(file);
  21                                 return 1;
  22                         }
  23                         return 2;
  24                 case '\n': return 0;
  25                 }
  26                 putchar(c);
  27         }
  28 }