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Our close-on-exec flag handling was broken: it's supposed to be specified per slot, not

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per file descriptor (a descriptor can be shared among several slots). There is now a
second table in the io_context structure that contains that information in a bitmap.
There are now two new (private) functions to control the close-on-exec flag, fd_close_on_exec(),
and fd_set_close_on_exec().
F_DUPFD, dup(), and dup2() are supposed to clear the close-on-exec flag on the duplicated
slot - this fixes bug #57 (no output after a redirect of a shell builtin).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14313 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2005-10-06 09:02:59 +00:00
parent e90c3fec10
commit 681779f1c8
4 changed files with 62 additions and 13 deletions
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headers/private/kernel/fs/fd.h
+3
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@@ -74,6 +74,9 @@ extern status_t select_fd(int fd, uint8 event, uint32 ref, struct select_sync *s
extern status_t deselect_fd(int fd, uint8 event, struct select_sync *sync, bool kernel);
extern bool fd_is_valid(int fd, bool kernel);
extern bool fd_close_on_exec(struct io_context *context, int fd);
extern void fd_set_close_on_exec(struct io_context *context, int fd, bool closeFD);
static struct io_context *get_current_io_context(bool kernel);
/* The prototypes of the (sys|user)_ functions are currently defined in vfs.h */