mirror of
https://github.com/drasko/codezero.git
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cb561ab262
Added UTCB functions for full ipc that copy buffer or string payloads in secondary message registers. Some posix syscalls now use these utcb functions to copy pathnames.
69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
/*
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* l4/posix glue for open()
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <sys/shm.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <l4lib/arch/syscalls.h>
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#include <l4lib/arch/syslib.h>
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#include <l4lib/ipcdefs.h>
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#include <l4lib/utcb.h>
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#include <fcntl.h>
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#include <l4/macros.h>
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#include INC_GLUE(memory.h)
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#include <shpage.h>
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#include <libposix.h>
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static inline int l4_open(const char *pathname, int flags, mode_t mode)
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{
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int fd;
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utcb_full_strcpy_from(pathname);
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write_mr(L4SYS_ARG0, flags);
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write_mr(L4SYS_ARG1, (u32)mode);
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/* Call pager with open() request. Check ipc error. */
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if ((fd = l4_sendrecv_full(PAGER_TID, PAGER_TID, L4_IPC_TAG_OPEN)) < 0) {
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print_err("%s: L4 IPC Error: %d.\n", __FUNCTION__, fd);
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return fd;
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}
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/* Check if syscall itself was successful */
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if ((fd = l4_get_retval()) < 0) {
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print_err("%s: OPEN Error: %d, for path %s\n",
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__FUNCTION__, fd, pathname);
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return fd;
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}
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return fd;
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}
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int open(const char *pathname, int oflag, ...)
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{
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int ret;
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mode_t mode = 0;
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if (oflag & O_CREAT) {
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va_list arg;
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va_start(arg, oflag);
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mode = va_arg(arg, mode_t);
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va_end(arg);
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}
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ret = l4_open(pathname, oflag, mode);
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/* If error, return positive error code */
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if (ret < 0) {
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errno = -ret;
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return -1;
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}
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/* else return value */
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return ret;
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}
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