minix/lib/libc/sys/open.c

   1 #include <sys/cdefs.h>
   2 #include "namespace.h"
   3 #include <lib.h>
   4
   5 #include <fcntl.h>
   6 #include <stdarg.h>
   7 #include <string.h>
   8
   9 int open(const char *name, int flags, ...)
  10 {
  11   va_list argp;
  12   message m;
  13   int call;
  14
  15   memset(&m, 0, sizeof(m));
  16   va_start(argp, flags);
  17   /* Depending on whether O_CREAT is set, a different message layout is used,
  18    * and therefore a different call number as well.
  19    */
  20   if (flags & O_CREAT) {
  21         m.m_lc_vfs_creat.len = strlen(name) + 1;
  22         m.m_lc_vfs_creat.flags = flags;
  23         m.m_lc_vfs_creat.mode = va_arg(argp, mode_t);
  24         m.m_lc_vfs_creat.name = (vir_bytes)name;
  25         call = VFS_CREAT;
  26   } else {
  27         _loadname(name, &m);
  28         m.m_lc_vfs_path.flags = flags;
  29         call = VFS_OPEN;
  30   }
  31   va_end(argp);
  32   return (_syscall(VFS_PROC_NR, call, &m));
  33 }