minix/lib/libpuffs/utility.c

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/* Created (MFS based):
* February 2010 (Evgeniy Ivanov)
*/
#include "fs.h"
#include <assert.h>
#include <stdarg.h>
#include "puffs.h"
#include "puffs_priv.h"
/*===========================================================================*
* no_sys *
*===========================================================================*/
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int no_sys()
{
/* Somebody has used an illegal system call number */
lpuffs_debug("no_sys: invalid call %d\n", req_nr);
return(EINVAL);
}
/*===========================================================================*
* mfs_nul *
*===========================================================================*/
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void mfs_nul_f(const char *file, int line, char *str, unsigned int len,
unsigned int maxlen)
{
if (len < maxlen && str[len-1] != '\0') {
lpuffs_debug("%s:%d string (length %d,maxlen %d) not null-terminated\n",
file, line, len, maxlen);
}
}
/*===========================================================================*
* clock_timespec *
*===========================================================================*/
struct timespec clock_timespec()
{
/* This routine returns the time in seconds since 1.1.1970. MINIX is an
* astrophysically naive system that assumes the earth rotates at a constant
* rate and that such things as leap seconds do not exist.
*/
static long system_hz = 0;
register int k;
struct timespec tv;
clock_t uptime;
clock_t realtime;
time_t boottime;
if (system_hz == 0) system_hz = sys_hz();
if ((k=getuptime(&uptime, &realtime, &boottime)) != OK)
panic("clock_timespec: getuptime failed: %d", k);
tv.tv_sec = (time_t) (boottime + (realtime/system_hz));
/* We do not want to overflow, and system_hz can be as high as 50kHz */
assert(system_hz < LONG_MAX/40000);
tv.tv_nsec = (realtime%system_hz) * 40000 / system_hz * 25000;
return tv;
}
/*===========================================================================*
* update_timens *
*===========================================================================*/
int update_timens(struct puffs_node *pn, int flags, struct timespec *t)
{
int r;
struct vattr va;
struct timespec new_time;
PUFFS_MAKECRED(pcr, &global_kcred);
if (!flags)
return 0;
if (global_pu->pu_ops.puffs_node_setattr == NULL)
return EINVAL;
new_time = t != NULL ? *t : clock_timespec();
puffs_vattr_null(&va);
/* librefuse modifies atime and mtime together,
* so set old values to avoid setting either one
* to PUFFS_VNOVAL (set by puffs_vattr_null).
*/
va.va_atime = pn->pn_va.va_atime;
va.va_mtime = pn->pn_va.va_mtime;
if (flags & ATIME)
va.va_atime = new_time;
if (flags & MTIME)
va.va_mtime = new_time;
if (flags & CTIME)
va.va_ctime = new_time;
r = global_pu->pu_ops.puffs_node_setattr(global_pu, pn, &va, pcr);
return(r);
}
/*===========================================================================*
* lpuffs_debug *
*===========================================================================*/
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void lpuffs_debug(const char *format, ...)
{
char buffer[256];
va_list args;
va_start (args, format);
vsprintf (buffer,format, args);
printf("%s: %s", fs_name, buffer);
va_end (args);
}