diff options
Diffstat (limited to 'cpukit/libfs/src/imfs/imfs_fchmod.c')
| -rw-r--r-- | cpukit/libfs/src/imfs/imfs_fchmod.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/cpukit/libfs/src/imfs/imfs_fchmod.c b/cpukit/libfs/src/imfs/imfs_fchmod.c index 02ac934854..d360a1543a 100644 --- a/cpukit/libfs/src/imfs/imfs_fchmod.c +++ b/cpukit/libfs/src/imfs/imfs_fchmod.c @@ -44,6 +44,25 @@ int IMFS_fchmod( if ( mode & (~ (S_IRWXU | S_IRWXG | S_IRWXO ) ) ) set_errno_and_return_minus_one( EPERM ); + /* + * If we make a linear-file writeable, construct a block file + * from it first. + */ + if ( (jnode->type == IMFS_LINEAR_FILE) && + (mode & (S_IWUSR | S_IWGRP | S_IWOTH)) ) + { + unsigned32 count = jnode->info.linearfile.size; + const unsigned char *buffer = jnode->info.linearfile.direct; + + jnode->type = IMFS_MEMORY_FILE; + jnode->info.file.size = 0; + jnode->info.file.indirect = 0; + jnode->info.file.doubly_indirect = 0; + jnode->info.file.triply_indirect = 0; + if (IMFS_memfile_write(jnode, 0, buffer, count) == -1) + return(-1); + } + jnode->st_mode &= ~(S_IRWXU | S_IRWXG | S_IRWXO); jnode->st_mode |= mode; |