minix/lib/libc/sys-minix/open.c
David van Moolenbroek 24ec0d73b5 Clean up interface to PM and VFS
- introduce new call numbers, names, and field aliases;
- initialize request messages to zero for all ABI calls;
- format callnr.h in the same way as com.h;
- redo call tables in both servers;
- remove param.h namespace pollution in the servers;
- make brk(2) go to VM directly, rather than through PM;
- remove obsolete BRK, UTIME, and WAIT calls;
- clean up path copying routine in VFS;
- move remaining system calls from libminlib to libc;
- correct some errno-related mistakes in libc routines.

Change-Id: I2d8ec5d061cd7e0b30c51ffd77aa72ebf84e2565
2014-03-01 09:05:01 +01:00

37 lines
792 B
C

#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#ifdef __weak_alias
__weak_alias(open, _open)
#endif
int open(const char *name, int flags, ...)
{
va_list argp;
message m;
int call;
memset(&m, 0, sizeof(m));
va_start(argp, flags);
/* Depending on whether O_CREAT is set, a different message layout is used,
* and therefore a different call number as well.
*/
if (flags & O_CREAT) {
m.VFS_CREAT_LEN = strlen(name) + 1;
m.VFS_CREAT_FLAGS = flags;
m.VFS_CREAT_MODE = va_arg(argp, int);
m.VFS_CREAT_NAME = (char *) __UNCONST(name);
call = VFS_CREAT;
} else {
_loadname(name, &m);
m.VFS_PATH_FLAGS = flags;
call = VFS_OPEN;
}
va_end(argp);
return (_syscall(VFS_PROC_NR, call, &m));
}