diplodocus.org Git - nmh/blob - sbr/read_line.c

   1 /* read_line.c -- read a possibly incomplete line from stdin.
   2  *
   3  * This code is Copyright (c) 2017, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include <h/mh.h>
   9 #include <h/utils.h>
  10 #include "read_line.h"
  11
  12 /*
  13  * Flush standard output, read a line from standard input into a static buffer,
  14  * zero out the newline, and return a pointer to the buffer.
  15  * On error, return NULL.
  16  */
  17 const char *
  18 read_line(void)
  19 {
  20     static char line[BUFSIZ];
  21
  22     fflush(stdout);
  23     if (fgets(line, sizeof(line), stdin) == NULL)
  24             return NULL;
  25     trim_suffix_c(line, '\n');
  26
  27     return line; /* May not be a complete line. */
  28 }