Opened 10 years ago

Closed 8 years ago

#3028 closed bug (fixed)

fseeko broken on stdin?

Reported by: kaliber Owned by: axeld
Priority: normal Milestone: R1
Component: System/ Version: R1/pre-alpha1
Keywords: Cc: haiku@…
Blocked By: Blocking:
Has a Patch: no Platform: All


Here is a test from findutils 4.4.0

/* Test of fseeko() function.
   Copyright (C) 2007 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <>.  */

/* Written by Bruno Haible <>, 2007.  */

#include <config.h>

#include <stdio.h>

/* Get off_t.  */
#include <sys/types.h>

main (int argc, char **argv)
  /* Assume stdin is non-empty and seekable iff argc > 1.  */
  int expected = argc > 1 ? 0 : -1;
  /* Exit with success only if fseek/fseeko agree.  */
  int r1 = fseeko (stdin, (off_t)0, SEEK_CUR);
  int r2 = fseek (stdin, (long)0, SEEK_CUR);
  if (r1 != r2 || r1 != expected)
    return 1;
  if (argc > 1)
      /* Test that fseek discards ungetc data.  */
      int ch = fgetc (stdin);
      if (ch == EOF)
        return 1;
      if (ungetc (ch ^ 0xff, stdin) != (ch ^ 0xff))
        return 1;
      if (fseeko (stdin, (off_t) 0, SEEK_END))
        return 1;
      if (fgetc (stdin) != EOF)
        return 1;
      /* Test that fseek resets end-of-file marker.  */
      if (!feof (stdin))
        return 1;
      if (fseeko (stdin, (off_t) 0, SEEK_END))
        return 1;
      if (feof (stdin))
        return 1;
  return 0;


fseeko (stdin, (off_t) 0, SEEK_END)

fgetc (stdin) returns 10 instead of EOF (-1)

Change History (3)

comment:1 Changed 10 years ago by scottmc

Cc: haiku@… added

comment:2 Changed 10 years ago by scottmc

maybe related to #3145?

comment:3 Changed 8 years ago by zooey

Resolution: fixed
Status: newclosed

Indeed this is related to hrev3145, since it seems to have been fixed along with that one, too.

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