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* io.c (rb_io_close_on_exec_p): new method IO#close_on_exec?.

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(rb_io_set_close_on_exec): new method IO#close_on_exec=.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13983 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2007-11-20 08:12:34 +00:00
parent 60d0ddc942
commit d481323b92
2 changed files with 101 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Tue Nov 20 17:10:11 2007 Tanaka Akira <akr@fsij.org>
* io.c (rb_io_close_on_exec_p): new method IO#close_on_exec?.
(rb_io_set_close_on_exec): new method IO#close_on_exec=.
Tue Nov 20 16:24:31 2007 Tanaka Akira <akr@fsij.org>
* gc.c (gc_mark_children): obj->as.file.fptr may be 0 for T_FILE.

96
io.c
View file

@ -2295,6 +2295,99 @@ rb_io_isatty(VALUE io)
return Qtrue;
}
/*
* call-seq:
* ios.close_on_exec? => true or false
*
* Returns <code>true</code> if <em>ios</em> will be closed on exec.
*
* f = open("/dev/null")
* f.close_on_exec? #=> false
* f.close_on_exec = true
* f.close_on_exec? #=> true
* f.close_on_exec = false
* f.close_on_exec? #=> false
*/
static VALUE
rb_io_close_on_exec_p(VALUE io)
{
#if defined(HAVE_FCNTL) && defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
rb_io_t *fptr;
VALUE write_io;
int fd, ret;
write_io = GetWriteIO(io);
if (io != write_io) {
GetOpenFile(write_io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fd, F_GETFD)) == -1) rb_sys_fail(fptr->path);
if (!(ret & FD_CLOEXEC)) return Qfalse;
}
}
GetOpenFile(io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fd, F_GETFD)) == -1) rb_sys_fail(fptr->path);
if (!(ret & FD_CLOEXEC)) return Qfalse;
}
return Qtrue;
#else
rb_notimplement();
return Qnil; /* not reached */
#endif
}
/*
* call-seq:
* ios.close_on_exec = bool => true or false
*
* Sets a close-on-exec flag.
*
* f = open("/dev/null")
* f.close_on_exec = true
* system("cat", "/proc/self/fd/#{f.fileno}") # cat: /proc/self/fd/3: No such file or directory
* f.closed? #=> false
*/
static VALUE
rb_io_set_close_on_exec(VALUE io, VALUE arg)
{
#if defined(HAVE_FCNTL) && defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
int flag = RTEST(arg) ? FD_CLOEXEC : 0;
rb_io_t *fptr;
VALUE write_io;
int fd, ret;
write_io = GetWriteIO(io);
if (io != write_io) {
GetOpenFile(write_io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fptr->fd, F_GETFD)) == -1) rb_sys_fail(fptr->path);
if ((ret & FD_CLOEXEC) != flag) {
ret = (ret & ~FD_CLOEXEC) | flag;
ret = fcntl(fd, F_SETFD, ret);
if (ret == -1) rb_sys_fail(fptr->path);
}
}
}
GetOpenFile(io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fd, F_GETFD)) == -1) rb_sys_fail(fptr->path);
if ((ret & FD_CLOEXEC) != flag) {
ret = (ret & ~FD_CLOEXEC) | flag;
ret = fcntl(fd, F_SETFD, ret);
if (ret == -1) rb_sys_fail(fptr->path);
}
}
#else
rb_notimplement();
#endif
return Qnil;
}
#define FMODE_PREP (1<<16)
#define IS_PREP_STDIO(f) ((f)->mode & FMODE_PREP)
#define PREP_STDIO_NAME(f) ((f)->path)
@ -6021,6 +6114,9 @@ Init_IO(void)
rb_define_method(rb_cIO, "eof", rb_io_eof, 0);
rb_define_method(rb_cIO, "eof?", rb_io_eof, 0);
rb_define_method(rb_cIO, "close_on_exec?", rb_io_close_on_exec_p, 0);
rb_define_method(rb_cIO, "close_on_exec=", rb_io_set_close_on_exec, 1);
rb_define_method(rb_cIO, "close", rb_io_close_m, 0);
rb_define_method(rb_cIO, "closed?", rb_io_closed, 0);
rb_define_method(rb_cIO, "close_read", rb_io_close_read, 0);