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If pread/pwrite are not supported by the OS, set the device pread()/pwrite() 

pointers to NULL so we automatically use seek() + read()/write() from now on.
edge.strict_endians
aia21 2006-12-10 19:38:02 +00:00
parent f73d77d568
commit 43b61b82e7
1 changed files with 7 additions and 2 deletions
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9
libntfs/device.c
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@ -223,10 +223,12 @@ seek:
return total;
/*
* If pread is not supported by the OS, fall back to emulating
* it by seek() + read().
* it by seek() + read() and set the device pread() pointer to
* NULL so we automatically use seek() + read() from now on.
*/
if (errno == ENOSYS && _pread != fake_pread) {
_pread = fake_pread;
dops->pread = NULL;
goto seek;
}
/* Nothing read and error, return error status. */
@ -318,10 +320,13 @@ seek:
break;
/*
* If pwrite is not supported by the OS, fall back to emulating
* it by seek() + write().
* it by seek() + write() and set the device pwrite() pointer
* to NULL so we automatically use seek() + write() from now
* on.
*/
if (errno == ENOSYS && _pwrite != fake_pwrite) {
_pwrite = fake_pwrite;
dops->pwrite = NULL;
goto seek;
}
/* Nothing written and error, return error status. */