lib/libpuffs/utility.c

   1 /* Created (MFS based):
   2  *   February 2010 (Evgeniy Ivanov)
   3  */
   4
   5 #include "fs.h"
   6
   7 #include <assert.h>
   8 #include <stdarg.h>
   9
  10 #include "puffs.h"
  11 #include "puffs_priv.h"
  12
  13
  14 /*===========================================================================*
  15  *                              no_sys                                       *
  16  *===========================================================================*/
  17 int no_sys()
  18 {
  19 /* Somebody has used an illegal system call number */
  20   lpuffs_debug("no_sys: invalid call %d\n", req_nr);
  21   return(EINVAL);
  22 }
  23
  24
  25 /*===========================================================================*
  26  *                              mfs_nul                                      *
  27  *===========================================================================*/
  28 void mfs_nul_f(const char *file, int line, char *str, unsigned int len,
  29                       unsigned int maxlen)
  30 {
  31   if (len < maxlen && str[len-1] != '\0') {
  32         lpuffs_debug("%s:%d string (length %d,maxlen %d) not null-terminated\n",
  33                 file, line, len, maxlen);
  34   }
  35 }
  36
  37
  38 /*===========================================================================*
  39  *                              clock_timespec                               *
  40  *===========================================================================*/
  41 struct timespec clock_timespec()
  42 {
  43 /* This routine returns the time in seconds since 1.1.1970.  MINIX is an
  44  * astrophysically naive system that assumes the earth rotates at a constant
  45  * rate and that such things as leap seconds do not exist.
  46  */
  47   static long system_hz = 0;
  48
  49   register int k;
  50   struct timespec tv;
  51   clock_t uptime;
  52   clock_t realtime;
  53   time_t boottime;
  54
  55   if (system_hz == 0) system_hz = sys_hz();
  56   if ((k=getuptime(&uptime, &realtime, &boottime)) != OK)
  57         panic("clock_timespec: getuptime failed: %d", k);
  58
  59   tv.tv_sec = (time_t) (boottime + (realtime/system_hz));
  60   /* We do not want to overflow, and system_hz can be as high as 50kHz */
  61   assert(system_hz < LONG_MAX/40000);
  62   tv.tv_nsec = (realtime%system_hz) * 40000 / system_hz * 25000;
  63   return tv;
  64 }
  65
  66
  67 /*===========================================================================*
  68  *                              update_timens                                *
  69  *===========================================================================*/
  70 int update_timens(struct puffs_node *pn, int flags, struct timespec *t)
  71 {
  72   int r;
  73   struct vattr va;
  74   struct timespec new_time;
  75   PUFFS_MAKECRED(pcr, &global_kcred);
  76
  77   if (!flags)
  78         return 0;
  79
  80   if (global_pu->pu_ops.puffs_node_setattr == NULL)
  81         return EINVAL;
  82
  83   new_time = t != NULL ? *t : clock_timespec();
  84
  85   puffs_vattr_null(&va);
  86   /* librefuse modifies atime and mtime together,
  87    * so set old values to avoid setting either one
  88    * to PUFFS_VNOVAL (set by puffs_vattr_null).
  89    */
  90   va.va_atime = pn->pn_va.va_atime;
  91   va.va_mtime = pn->pn_va.va_mtime;
  92
  93   if (flags & ATIME)
  94         va.va_atime = new_time;
  95   if (flags & MTIME)
  96         va.va_mtime = new_time;
  97   if (flags & CTIME)
  98         va.va_ctime = new_time;
  99
 100   r = global_pu->pu_ops.puffs_node_setattr(global_pu, pn, &va, pcr);
 101
 102   return(r);
 103 }
 104
 105
 106 /*===========================================================================*
 107  *                              lpuffs_debug                                 *
 108  *===========================================================================*/
 109 void lpuffs_debug(const char *format, ...)
 110 {
 111   char buffer[256];
 112   va_list args;
 113   va_start (args, format);
 114   vsprintf (buffer,format, args);
 115   printf("%s: %s", fs_name, buffer);
 116   va_end (args);
 117 }