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io.c: refine error message

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* io.c (do_io_advise): more precise error message, with arguments.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46766 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-07-09 07:19:43 +00:00
parent 209314c274
commit 92a04a4915
1 changed files with 13 additions and 1 deletions
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14
io.c
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@ -65,6 +65,13 @@
#if !HAVE_OFF_T && !defined(off_t)
# define off_t long
#endif
#if SIZEOF_OFF_T > SIZEOF_LONG && defined(HAVE_LONG_LONG)
# define PRI_OFF_T_PREFIX "ll"
#elif SIZEOF_OFF_T == SIZEOF_LONG
# define PRI_OFF_T_PREFIX "l"
#else
# define PRI_OFF_T_PREFIX ""
#endif
#include <sys/stat.h>
@ -8507,7 +8514,12 @@ do_io_advise(rb_io_t *fptr, VALUE advice, off_t offset, off_t len)
if (rv) {
/* posix_fadvise(2) doesn't set errno. On success it returns 0; otherwise
it returns the error code. */
rb_syserr_fail_str(rv, fptr->pathv);
VALUE message = rb_sprintf("%"PRIsVALUE" "
"(%"PRI_OFF_T_PREFIX"d, "
"%"PRI_OFF_T_PREFIX"d, "
"%"PRIsVALUE")",
fptr->pathv, offset, len, advice);
rb_syserr_fail_str(rv, message);
}
return Qnil;