diff options
author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-09-11 10:34:02 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-09-12 15:31:12 +0200 |
commit | b6657c395747eedba02409388780ad5f05581322 (patch) | |
tree | 103bebd674a55b80248959552b3d40272cc14346 /cpukit/libcsupport/src/fchmod.c | |
parent | dosfs: Correct handling of iconv() return value (diff) | |
download | rtems-b6657c395747eedba02409388780ad5f05581322.tar.bz2 |
Filesystem: Add and use rtems_filesystem_chmod()
Implement POSIX requirements in the high-level file system layer.
Diffstat (limited to 'cpukit/libcsupport/src/fchmod.c')
-rw-r--r-- | cpukit/libcsupport/src/fchmod.c | 49 |
1 files changed, 41 insertions, 8 deletions
diff --git a/cpukit/libcsupport/src/fchmod.c b/cpukit/libcsupport/src/fchmod.c index 94e82647fc..b8f4d333fb 100644 --- a/cpukit/libcsupport/src/fchmod.c +++ b/cpukit/libcsupport/src/fchmod.c @@ -22,6 +22,42 @@ #include <rtems/libio_.h> +int rtems_filesystem_chmod( + const rtems_filesystem_location_info_t *loc, + mode_t mode +) +{ + 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 ) { + mode_t mask = S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX; + + mode = (st.st_mode & ~mask) | (mode & mask); + + rv = (*mt_entry->ops->fchmod_h)( loc, mode ); + } else { + errno = EPERM; + rv = -1; + } + } + } else { + errno = EROFS; + rv = -1; + } + + return rv; +} + /** * POSIX 1003.1b 5.6.4 - Change File Modes */ @@ -34,14 +70,11 @@ int fchmod( int fd, mode_t mode ) 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->fchmod_h)( &iop->pathinfo, mode ); - rtems_filesystem_instance_unlock( &iop->pathinfo ); - } else { - errno = EROFS; - rv = -1; - } + rtems_filesystem_instance_lock( &iop->pathinfo ); + + rv = rtems_filesystem_chmod( &iop->pathinfo, mode ); + + rtems_filesystem_instance_unlock( &iop->pathinfo ); return rv; } |