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* io.c (io_reopen): avoid dup2() equal handles not to close itself and

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to get rid of a msvcrt bug.  [ruby-dev:20919]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4177 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2003-07-26 18:10:47 +00:00
parent 2dfe646bae
commit f01fe1351e
2 changed files with 34 additions and 24 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Sun Jul 27 03:10:43 2003 Nobuyoshi Nakada <nobu.nokada@softhome.net>
* io.c (io_reopen): avoid dup2() equal handles not to close itself and
to get rid of a msvcrt bug. [ruby-dev:20919]
Sun Jul 27 00:37:16 2003 WATANABE Hirofumi <eban@ruby-lang.org>
* lib/tmpdir.rb: use GetWindowsDirectory, not GetSystemDirectory.

53
io.c
View File

@ -2351,7 +2351,7 @@ io_reopen(io, nfile)
{
OpenFile *fptr, *orig;
char *mode;
int fd;
int fd, fd2;
off_t pos = 0;
nfile = rb_io_get_io(nfile);
@ -2386,36 +2386,41 @@ io_reopen(io, nfile)
mode = rb_io_mode_string(fptr);
fd = fileno(fptr->f);
if (fptr->f == stdin || fptr->f == stdout || fptr->f == stderr) {
clearerr(fptr->f);
/* need to keep stdio objects */
if (dup2(fileno(orig->f), fd) < 0)
rb_sys_fail(orig->path);
}
else {
fclose(fptr->f);
if (dup2(fileno(orig->f), fd) < 0)
rb_sys_fail(orig->path);
fptr->f = rb_fdopen(fd, mode);
}
rb_thread_fd_close(fd);
if ((orig->mode & FMODE_READABLE) && pos >= 0) {
io_seek(fptr, pos, SEEK_SET);
io_seek(orig, pos, SEEK_SET);
fd2 = fileno(orig->f);
if (fd != fd2) {
if (fptr->f == stdin || fptr->f == stdout || fptr->f == stderr) {
clearerr(fptr->f);
/* need to keep stdio objects */
if (dup2(fd2, fd) < 0)
rb_sys_fail(orig->path);
}
else {
fclose(fptr->f);
if (dup2(fd2, fd) < 0)
rb_sys_fail(orig->path);
fptr->f = rb_fdopen(fd, mode);
}
rb_thread_fd_close(fd);
if ((orig->mode & FMODE_READABLE) && pos >= 0) {
io_seek(fptr, pos, SEEK_SET);
io_seek(orig, pos, SEEK_SET);
}
}
if (fptr->f2 && fd != fileno(fptr->f2)) {
fd = fileno(fptr->f2);
fclose(fptr->f2);
rb_thread_fd_close(fd);
if (orig->f2) {
if (dup2(fileno(orig->f2), fd) < 0)
if (!orig->f2) {
fclose(fptr->f2);
rb_thread_fd_close(fd);
fptr->f2 = 0;
}
else if (fd != (fd2 = fileno(orig->f2))) {
fclose(fptr->f2);
rb_thread_fd_close(fd);
if (dup2(fd2, fd) < 0)
rb_sys_fail(orig->path);
fptr->f2 = rb_fdopen(fd, "w");
}
else {
fptr->f2 = 0;
}
}
if (fptr->mode & FMODE_BINMODE) {