/*
* Open a file specified by a parsed file name (which may be only a
* device).
*/
int
zopen_file(i_ctx_t *i_ctx_p, const gs_parsed_file_name_t *pfn,
const char *file_access, stream **ps, gs_memory_t *mem)
{
gx_io_device *const iodev = pfn->iodev;
if (pfn->fname == NULL) /* just a device */
return iodev->procs.open_device(iodev, file_access, ps, mem);
else { /* file */
iodev_proc_open_file((*open_file)) = iodev->procs.open_file;
if (open_file == 0)
open_file = iodev_os_open_file;
/* Check OS files to make sure we allow the type of access */
if (open_file == iodev_os_open_file) {
int code = check_file_permissions(i_ctx_p, pfn->fname, pfn->len,
file_access[0] == 'r' ? "PermitFileReading" : "PermitFileWriting");
if (code < 0 && !file_is_tempfile(i_ctx_p,
(const uchar *)pfn->fname, pfn->len))
return code;
}
return open_file(iodev, pfn->fname, pfn->len, file_access, ps, mem);
}
}
/* <string1> <string2> renamefile - */
static int
zrenamefile(i_ctx_t *i_ctx_p)
{
int code;
os_ptr op = osp;
gs_parsed_file_name_t pname1, pname2;
code = parse_real_file_name(op, &pname2, imemory, "renamefile(to)");
if (code < 0)
return code;
pname1.fname = 0;
code = parse_real_file_name(op - 1, &pname1, imemory, "renamefile(from)");
if (code >= 0) {
gx_io_device *iodev_dflt = iodev_default(imemory);
if (pname1.iodev != pname2.iodev ) {
if (pname1.iodev == iodev_dflt)
pname1.iodev = pname2.iodev;
if (pname2.iodev == iodev_dflt)
pname2.iodev = pname1.iodev;
}
if (pname1.iodev != pname2.iodev ||
(pname1.iodev == iodev_dflt &&
/*
* We require FileControl permissions on the source path
* unless it is a temporary file. Also, we require FileControl
* and FileWriting permissions to the destination file/path.
*/
((check_file_permissions(i_ctx_p, pname1.fname, pname1.len,
"PermitFileControl") < 0 &&
!file_is_tempfile(i_ctx_p, op[-1].value.bytes, r_size(op - 1))) ||
(check_file_permissions(i_ctx_p, pname2.fname, pname2.len,
"PermitFileControl") < 0 ||
check_file_permissions(i_ctx_p, pname2.fname, pname2.len,
"PermitFileWriting") < 0 )))) {
code = gs_note_error(e_invalidfileaccess);
} else {
code = (*pname1.iodev->procs.rename_file)(pname1.iodev,
pname1.fname, pname2.fname);
}
}
gs_free_file_name(&pname2, "renamefile(to)");
gs_free_file_name(&pname1, "renamefile(from)");
if (code < 0)
return code;
pop(2);
return 0;
}
/* <string> deletefile - */
static int
zdeletefile(i_ctx_t *i_ctx_p)
{
os_ptr op = osp;
gs_parsed_file_name_t pname;
int code = parse_real_file_name(op, &pname, imemory, "deletefile");
if (code < 0)
return code;
if (pname.iodev == iodev_default) {
if ((code = check_file_permissions(i_ctx_p, pname.fname, pname.len,
"PermitFileControl")) < 0 &&
!file_is_tempfile(i_ctx_p, op->value.bytes, r_size(op))) {
return code;
}
}
code = (*pname.iodev->procs.delete_file)(pname.iodev, pname.fname);
gs_free_file_name(&pname, "deletefile");
if (code < 0)
return code;
pop(1);
return 0;
}
