sys/src/cmd/6c/sys.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include "/sys/src/libc/9syscall/sys.h"
   4
   5 vlong   _sysargs[6*4];
   6 vlong _callsys(void);
   7
   8 /*
   9  * syscalls
  10  */
  11
  12 int
  13 getpid(void)
  14 {
  15         _sysargs[0] = -1;
  16         return _callsys();
  17 }
  18
  19 long
  20 pread(int fd, void *a, long n, vlong)
  21 {
  22         _sysargs[0] = PREAD;
  23         _sysargs[1] = fd;
  24         _sysargs[2] = (vlong)a;
  25         _sysargs[3] = n;
  26         return _callsys();
  27 }
  28
  29 long
  30 pwrite(int fd, void *a, long n, vlong)
  31 {
  32         _sysargs[0] = PWRITE;
  33         _sysargs[1] = fd;
  34         _sysargs[2] = (vlong)a;
  35         _sysargs[3] = n;
  36         return _callsys();
  37 }
  38
  39 int
  40 close(int fd)
  41 {
  42         _sysargs[0] = CLOSE;
  43         _sysargs[1] = fd;
  44         return _callsys();
  45 }
  46
  47 int
  48 open(char *name, int mode)
  49 {
  50         _sysargs[0] = OPEN;
  51         _sysargs[1] = (vlong)name;
  52         _sysargs[2] = mode;
  53         return _callsys();
  54 }
  55
  56 int
  57 create(char *f, int mode, ulong perm)
  58 {
  59         _sysargs[0] = CREATE;
  60         _sysargs[1] = (vlong)f;
  61         _sysargs[2] = mode;
  62         _sysargs[3] = perm;
  63         return _callsys();
  64 }
  65
  66 void
  67 _exits(char *s)
  68 {
  69         _sysargs[0] = EXITS;
  70         _sysargs[1] = s!=nil? strlen(s): 0;
  71         _callsys();
  72 }
  73
  74 int
  75 dup(int f, int t)
  76 {
  77         _sysargs[0] = DUP;
  78         _sysargs[1] = f;
  79         _sysargs[2] = t;
  80         return _callsys();
  81 }
  82
  83 int
  84 errstr(char *buf, uint n)
  85 {
  86         _sysargs[0] = ERRSTR;
  87         _sysargs[1] = (vlong)buf;
  88         _sysargs[2] = n;
  89         return _callsys();
  90 }
  91
  92 int
  93 brk_(void *a)
  94 {
  95         _sysargs[0] = BRK_;
  96         _sysargs[1] = (vlong)a;
  97         return _callsys();
  98 }
  99
 100 void*
 101 sbrk(ulong n)
 102 {
 103         _sysargs[0] = -2;
 104         _sysargs[1] = n;
 105         return (void*)_callsys();
 106 }