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Added test code for testing of directory listing.

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Added system call prototypes and posix glue for reading a directory.

TODO:
FS0 should implement the L4_IPC_TAG_READDIR ipc call.
This commit is contained in:
Bahadir Balban
2008-02-12 19:09:46 +00:00
parent 86dfd6a753
commit 193430d226
5 changed files with 210 additions and 12 deletions
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75
tasks/libposix/read.c
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@@ -1,5 +1,5 @@
/*
* l4/posix glue for read()
* l4/posix glue for read() / sys_readdir()
*
* Copyright (C) 2007 Bahadir Balban
*/
@@ -10,35 +10,86 @@
#include <l4lib/arch/syscalls.h>
#include <l4lib/arch/syslib.h>
#include <l4lib/ipcdefs.h>
#include <l4lib/os/posix/readdir.h>
static inline int l4_read(int fd, void *buf, size_t count)
static inline int l4_readdir(int fd, void *buf, size_t count)
{
size_t rcnt;
size_t cnt;
write_mr(L4SYS_ARG0, fd);
write_mr(L4SYS_ARG1, (unsigned long)buf);
write_mr(L4SYS_ARG2, count);
/* Call pager with shmget() request. Check ipc error. */
if ((errno = l4_sendrecv(VFS_TID, VFS_TID, L4_IPC_TAG_READ)) < 0) {
printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, errno);
return -1;
if ((cnt = l4_sendrecv(VFS_TID, VFS_TID, L4_IPC_TAG_READDIR)) < 0) {
printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, cnt);
return cnt;
}
/* Check if syscall itself was successful */
if ((rcnt = l4_get_retval()) < 0) {
printf("%s: READ Error: %d.\n", __FUNCTION__, (int)rcnt);
errno = (int)rcnt;
return -1;
if ((cnt = l4_get_retval()) < 0) {
printf("%s: READ Error: %d.\n", __FUNCTION__, (int)cnt);
return cnt;
}
return rcnt;
return cnt;
}
static inline int l4_read(int fd, void *buf, size_t count)
{
size_t cnt;
write_mr(L4SYS_ARG0, fd);
write_mr(L4SYS_ARG1, (unsigned long)buf);
write_mr(L4SYS_ARG2, count);
/* Call pager with shmget() request. Check ipc error. */
if ((cnt = l4_sendrecv(VFS_TID, VFS_TID, L4_IPC_TAG_READ)) < 0) {
printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, cnt);
return cnt;
}
/* Check if syscall itself was successful */
if ((cnt = l4_get_retval()) < 0) {
printf("%s: READ Error: %d.\n", __FUNCTION__, (int)cnt);
return cnt;
}
return cnt;
}
ssize_t read(int fd, void *buf, size_t count)
{
int ret;
if (!count)
return 0;
return l4_read(fd, buf, count);
ret = l4_read(fd, buf, count);
/* If error, return positive error code */
if (ret < 0) {
errno = -ret;
return -1;
}
/* else return value */
return ret;
}
ssize_t os_readdir(int fd, void *buf, size_t count)
{
int ret;
if (!count)
return 0;
ret = l4_readdir(fd, buf, count);
/* If error, return positive error code */
if (ret < 0) {
errno = -ret;
return -1;
}
/* else return value */
return ret;
}