stat_convert_form()

Updated: May 06, 2022

Convert a stat structure from one form to another

Synopsis:

#include <sys/stat.h>

int stat_convert_form( int src_form,
                       const void *src_stat,
                       int dst_form,
                       void *dst_stat,
                       unsigned max_dst );

Arguments:

src_form
The form of the source stat structure; one of:
  • _STAT_FORM_UNSET — unknown; this is assumed to be the same as _STAT_FORM_T32_2001
  • _STAT_FORM_T32_2001 — 32-bit fields, POSIX 2001
  • _STAT_FORM_T32_2008 — 32-bit fields, POSIX 2008
  • _STAT_FORM_T64_2008 — 64-bit fields, POSIX 2008
  • _STAT_FORM_SYS_2008_STAT_FORM_T32_2008 in programs compiled for a 32-bit architecture, or _STAT_FORM_T64_2008 in programs compiled for a 64-bit architecture.
  • _STAT_FORM_PREFERRED — the preferred form: _STAT_FORM_T32_2001 in programs compiled for a 32-bit architecture, or _STAT_FORM_T64_2008 in programs compiled for a 64-bit architecture.
src_stat
A pointer to the stat structure that you want to convert.
dst_form
The form of stat structure that you want. This must be one of the _STAT_FORM_* types listed above, except that you can't specify it to be _STAT_FORM_UNSET.
dst_stat
A pointer to a stat structure where the function can store the information.
max_dst
The size of the area that dst_stat points to.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The stat_convert_form() function converts a given struct stat structure into another form. The forms depend on the architecture (32- or 64-bit) and on the version of POSIX (2001 or 2008). The POSIX 2008 forms include st_mtim, st_atim, and st_ctim fields, of type struct timespec, that support nanosecond-resolution timestamps.

Returns:

The size of the converted structure, or a negative error code:

-EINVAL
The source or destination form is invalid.
-EOPNOTSUP
The conversion from src_form to dst_form isn't supported.
-EOVERFLOW
The converted structure is larger than max_dst, or the tv_sec member of the st_mtim, st_atim, or st_ctim field is greater than will fit in the 32-bit version of struct timespec.

Classification:

QNX Neutrino

Safety:  
Cancellation point No
Interrupt handler Yes
Signal handler Yes
Thread Yes