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authorJeff Dike <jdike@addtoit.com>2007-05-06 14:51:35 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-07 12:13:03 -0700
commita61f334fd2864b9b040f7e882726426ed7e8a317 (patch)
tree51874236a1f324a2664118f54aadd9ba3beb95ca /arch/um/os-Linux/sigio.c
parentef0470c053274c343b2be8737e0146d65e17f9be (diff)
uml: convert libc layer to call read and write
This patch converts calls in the os layer to os_{read,write}_file to calls directly to libc read() and write() where it is clear that the I/O buffer is in the kernel. We can do that here instead of calling os_{read,write}_file_k since we are in libc code and can call libc directly. With the change in the calls, error handling needs to be changed to refer to errno directly rather than the return value of the call. CATCH_EINTR wrappers were also added where needed. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/os-Linux/sigio.c')
-rw-r--r--arch/um/os-Linux/sigio.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c
index 8ccf6a36f1c6..8d4e0c6b8c92 100644
--- a/arch/um/os-Linux/sigio.c
+++ b/arch/um/os-Linux/sigio.c
@@ -69,11 +69,12 @@ static int write_sigio_thread(void *unused)
p = &fds->poll[i];
if(p->revents == 0) continue;
if(p->fd == sigio_private[1]){
- n = os_read_file(sigio_private[1], &c, sizeof(c));
+ CATCH_EINTR(n = read(sigio_private[1], &c,
+ sizeof(c)));
if(n != sizeof(c))
printk("write_sigio_thread : "
"read on socket failed, "
- "err = %d\n", -n);
+ "err = %d\n", errno);
tmp = current_poll;
current_poll = next_poll;
next_poll = tmp;
@@ -86,10 +87,10 @@ static int write_sigio_thread(void *unused)
(fds->used - i) * sizeof(*fds->poll));
}
- n = os_write_file(respond_fd, &c, sizeof(c));
+ CATCH_EINTR(n = write(respond_fd, &c, sizeof(c)));
if(n != sizeof(c))
printk("write_sigio_thread : write on socket "
- "failed, err = %d\n", -n);
+ "failed, err = %d\n", errno);
}
}
@@ -127,15 +128,15 @@ static void update_thread(void)
char c;
flags = set_signals(0);
- n = os_write_file(sigio_private[0], &c, sizeof(c));
+ n = write(sigio_private[0], &c, sizeof(c));
if(n != sizeof(c)){
- printk("update_thread : write failed, err = %d\n", -n);
+ printk("update_thread : write failed, err = %d\n", errno);
goto fail;
}
- n = os_read_file(sigio_private[0], &c, sizeof(c));
+ CATCH_EINTR(n = read(sigio_private[0], &c, sizeof(c)));
if(n != sizeof(c)){
- printk("update_thread : read failed, err = %d\n", -n);
+ printk("update_thread : read failed, err = %d\n", errno);
goto fail;
}
@@ -459,10 +460,10 @@ static void tty_output(int master, int slave)
memset(buf, 0, sizeof(buf));
- while(os_write_file(master, buf, sizeof(buf)) > 0) ;
+ while(write(master, buf, sizeof(buf)) > 0) ;
if(errno != EAGAIN)
panic("tty_output : write failed, errno = %d\n", errno);
- while(((n = os_read_file(slave, buf, sizeof(buf))) > 0) && !got_sigio) ;
+ while(((n = read(slave, buf, sizeof(buf))) > 0) && !got_sigio) ;
if(got_sigio){
printk("Yes\n");