minix/lib/libc/sys-minix/fcntl.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

45 lines
902 B
C

#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <string.h>
#include <fcntl.h>
#include <stdarg.h>
#ifdef __weak_alias
__weak_alias(fcntl, _fcntl)
#endif
int fcntl(int fd, int cmd, ...)
{
va_list argp;
message m;
va_start(argp, cmd);
/* Set up for the sensible case where there is no variable parameter. This
* covers F_GETFD, F_GETFL and invalid commands.
*/
memset(&m, 0, sizeof(m));
/* Adjust for the stupid cases. */
switch(cmd) {
case F_DUPFD:
case F_SETFD:
case F_SETFL:
m.VFS_FCNTL_ARG_INT = va_arg(argp, int);
break;
case F_GETLK:
case F_SETLK:
case F_SETLKW:
case F_FREESP:
m.VFS_FCNTL_ARG_PTR = (char *) va_arg(argp, struct flock *);
break;
}
/* Clean up and make the system call. */
va_end(argp);
m.VFS_FCNTL_FD = fd;
m.VFS_FCNTL_CMD = cmd;
return(_syscall(VFS_PROC_NR, VFS_FCNTL, &m));
}