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/* $OpenBSD: uthread_closefrom.c,v 1.1 2004/01/15 22:22:11 marc Exp $ */
/* PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <unistd.h>
#include "pthread_private.h"
/*
* Reset the non-blocking flag if necessary. Remove the fd table entry
* for the given fd.
*/
static void
_close_flags(int fd)
{
struct stat sb;
int flags;
if (_FD_LOCK(fd, FD_RDWR, NULL) == 0) {
if ((_thread_sys_fstat(fd, &sb) == 0) &&
((S_ISREG(sb.st_mode) || S_ISCHR(sb.st_mode)) &&
(_thread_fd_table[fd]->flags & O_NONBLOCK) == 0)) {
/* Get the current flags: */
flags = _thread_sys_fcntl(fd, F_GETFL, NULL);
/* Clear the nonblocking file descriptor flag: */
_thread_sys_fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
}
_thread_fd_table_remove(fd);
}
}
int
closefrom(int fd)
{
int ret;
int safe_fd;
int lock_fd;
_thread_enter_cancellation_point();
if (fd < 0 || fd >= _thread_dtablesize) {
errno = EBADF;
ret = -1;
} else {
safe_fd = _thread_kern_pipe[0] > _thread_kern_pipe[1] ?
_thread_kern_pipe[0] : _thread_kern_pipe[1];
/*
* close individual files until we get past the pipe
* fds. Attempting to close a pipe fd is a no-op.
*/
for (safe_fd++; fd < safe_fd; fd++)
close(fd);
/* Reset flags and clean up the fd table for fds to close */
for (lock_fd = fd; lock_fd < _thread_dtablesize; lock_fd++)
if (_thread_fd_table[lock_fd] != NULL)
_close_flags(lock_fd);
/* Now let the system do its thing */
ret = _thread_sys_closefrom(fd);
}
_thread_leave_cancellation_point();
return ret;
}
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