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POSIX: F_DUPFD_CLOEXEC support (POSIX.1-2008).

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* fix #12187.
This commit is contained in:
Jérôme Duval
2017-08-24 17:54:50 +02:00
parent a74f88cf8f
commit 26740b2889
2 changed files with 3 additions and 1 deletions
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headers/posix/fcntl.h
+1
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@@ -20,6 +20,7 @@
#define F_GETLK 0x0020 /* get locking information */ #define F_GETLK 0x0020 /* get locking information */
#define F_SETLK 0x0080 /* set locking information */ #define F_SETLK 0x0080 /* set locking information */
#define F_SETLKW 0x0100 /* as above, but waits if blocked */ #define F_SETLKW 0x0100 /* as above, but waits if blocked */
#define F_DUPFD_CLOEXEC 0x0200 /* duplicate fd with close on exec set */
/* advisory locking types */ /* advisory locking types */
#define F_RDLCK 0x0040 /* read or shared lock */ #define F_RDLCK 0x0040 /* read or shared lock */
src/system/kernel/fs/vfs.cpp
+2 -1
View File
@@ -6147,13 +6147,14 @@ common_fcntl(int fd, int op, size_t argument, bool kernel)
break; break;
case F_DUPFD: case F_DUPFD:
case F_DUPFD_CLOEXEC:
{ {
struct io_context* context = get_current_io_context(kernel); struct io_context* context = get_current_io_context(kernel);
status = new_fd_etc(context, descriptor, (int)argument); status = new_fd_etc(context, descriptor, (int)argument);
if (status >= 0) { if (status >= 0) {
mutex_lock(&context->io_mutex); mutex_lock(&context->io_mutex);
fd_set_close_on_exec(context, fd, false); fd_set_close_on_exec(context, fd, op == F_DUPFD_CLOEXEC);
mutex_unlock(&context->io_mutex); mutex_unlock(&context->io_mutex);
atomic_add(&descriptor->ref_count, 1); atomic_add(&descriptor->ref_count, 1);