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fread() returns 0 on eof or error, not EOF. This fixes the following

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bug:

  "head -c <n>" never exit and loops forever (until it is killed),
  if the input stream has fewer bytes than specified (n).

PR:		bin/8225
Submitted-by:	FUJIMOTO Kensaku <fujimoto@oscar.elec.waseda.ac.jp>
This commit is contained in:
Dag-Erling Smørgrav 1998-10-09 10:33:46 +00:00
parent 1daa104c05
commit 710668cad4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=40114
1 changed files with 2 additions and 2 deletions
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4
usr.bin/head/head.c
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@ -42,7 +42,7 @@ static const char copyright[] =
static char sccsid[] = "@(#)head.c 8.2 (Berkeley) 5/4/95";
#endif
static const char rcsid[] =
"$Id: head.c,v 1.7 1997/07/10 06:46:13 charnier Exp $";
"$Id: head.c,v 1.8 1997/07/11 06:13:18 charnier Exp $";
#endif /* not lint */
#include <sys/types.h>
@ -157,7 +157,7 @@ head_bytes(fp, cnt)
else
readlen = sizeof(buf);
readlen = fread(buf, sizeof(char), readlen, fp);
if (readlen == EOF)
if (readlen == 0)
break;
if (fwrite(buf, sizeof(char), readlen, stdout) != readlen)
err(1, "stdout");