src/err.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <stdarg.h>
   4 #include <limits.h>
   5
   6 #define err(eval, fmt, ...)     print_string(eval, 1, fmt, ## __VA_ARGS__)
   7 #define errx(eval, fmt, ...)    print_string(eval, 0, fmt, ## __VA_ARGS__)
   8 #define warn(fmt, ...)          print_string(-1, 0, fmt, ## __VA_ARGS__)
   9 #define warnx(fmt, ...)         print_string(-1, 1, fmt, ## __VA_ARGS__)
  10
  11 void print_string(int eval, int prog, const char *fmt, ...)
  12 {
  13     va_list ap;
  14     char line[LINE_MAX];
  15
  16 #ifndef HAVE___PROGNAME
  17     char *__progname = "ui";
  18 #else
  19     extern char *__progname;
  20 #endif
  21
  22     va_start(ap, fmt);
  23     vsnprintf(line, sizeof(line), fmt, ap);
  24     va_end(ap);
  25
  26     fprintf(stderr, "%s%s%s\n", (prog) ? __progname : "", (prog) ? ": " : "",
  27             line);
  28
  29     if (eval > -1)
  30         exit(eval);
  31
  32     return;
  33 }