minix/lib/libc/posix/_fcntl.c

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#include <lib.h>
#define fcntl _fcntl
#include <fcntl.h>
#include <stdarg.h>
#if _ANSI
PUBLIC int fcntl(int fd, int cmd, ...)
#else
PUBLIC int fcntl(fd, cmd)
int fd;
int cmd;
#endif
{
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.
*/
m.m1_i3 = 0;
m.m1_p1 = NULL;
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/* Adjust for the stupid cases. */
switch(cmd) {
case F_DUPFD:
case F_SETFD:
case F_SETFL:
m.m1_i3 = va_arg(argp, int);
break;
case F_GETLK:
case F_SETLK:
case F_SETLKW:
case F_FREESP:
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m.m1_p1 = (char *) va_arg(argp, struct flock *);
break;
}
/* Clean up and make the system call. */
va_end(argp);
m.m1_i1 = fd;
m.m1_i2 = cmd;
return(_syscall(FS, FCNTL, &m));
}