diff options
Diffstat (limited to 'cpukit/libcsupport/src/fchown.c')
-rw-r--r-- | cpukit/libcsupport/src/fchown.c | 52 |
1 files changed, 39 insertions, 13 deletions
diff --git a/cpukit/libcsupport/src/fchown.c b/cpukit/libcsupport/src/fchown.c index ec84fe4f47..2e741592da 100644 --- a/cpukit/libcsupport/src/fchown.c +++ b/cpukit/libcsupport/src/fchown.c @@ -22,30 +22,56 @@ #include <rtems/libio_.h> +int rtems_filesystem_chown( + const rtems_filesystem_location_info_t *loc, + uid_t owner, + gid_t group +) +{ + const rtems_filesystem_mount_table_entry_t *mt_entry = loc->mt_entry; + int rv; + + if ( mt_entry->writeable || rtems_filesystem_location_is_null( loc ) ) { + struct stat st; + + memset( &st, 0, sizeof(st) ); + + rv = (*loc->handlers->fstat_h)( loc, &st ); + if ( rv == 0 ) { + uid_t uid = geteuid(); + + if ( uid == 0 || st.st_uid == uid ) { + rv = (*mt_entry->ops->chown_h)( loc, owner, group ); + } else { + errno = EPERM; + rv = -1; + } + } + } else { + errno = EROFS; + rv = -1; + } + + return rv; +} + /** * POSIX 1003.1b 5.6.5 - Change Owner and Group of a File */ int fchown( int fd, uid_t owner, gid_t group ) { - int rv = 0; + int rv; rtems_libio_t *iop; rtems_libio_check_fd( fd ); iop = rtems_libio_iop( fd ); rtems_libio_check_is_open(iop); - if (iop->pathinfo.mt_entry->writeable) { - rtems_filesystem_instance_lock( &iop->pathinfo ); - rv = (*iop->pathinfo.mt_entry->ops->chown_h)( - &iop->pathinfo, - owner, - group - ); - rtems_filesystem_instance_unlock( &iop->pathinfo ); - } else { - errno = EROFS; - rv = -1; - } + rtems_filesystem_instance_lock( &iop->pathinfo ); + + rv = rtems_filesystem_chown( &iop->pathinfo, owner, group ); + + rtems_filesystem_instance_unlock( &iop->pathinfo ); return rv; } |