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| author | Brian Fox <bfox@gnu.org> | 1993-10-25 04:42:12 +0000 |
|---|---|---|
| committer | Brian Fox <bfox@gnu.org> | 1993-10-25 04:42:12 +0000 |
| commit | f73b0adae74fa2470bb5a4cb238af38a4fdef985 (patch) | |
| tree | d2a10e68e24b0469a23d007fca0fc5b61e5b407d /src | |
| parent | 84d91fda2ee57bb9f5ba844f3d8cfa0ceda2ce5f (diff) | |
| download | emacs-f73b0adae74fa2470bb5a4cb238af38a4fdef985.tar.gz | |
(Fcopy_file): Don't allow the copying of anything other than regular
files or symlink files.
Diffstat (limited to 'src')
| -rw-r--r-- | src/fileio.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/src/fileio.c b/src/fileio.c index 02d4e635a51..129438fa07a 100644 --- a/src/fileio.c +++ b/src/fileio.c @@ -22,6 +22,14 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <sys/types.h> #include <sys/stat.h> +#if !defined (S_ISLNK) && defined (S_IFLNK) +# define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) +#endif + +#if !defined (S_ISREG) && defined (S_IFREG) +# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) +#endif + #ifdef VMS #include "vms-pwd.h" #else @@ -1586,6 +1594,7 @@ A prefix arg makes KEEP-TIME non-nil.") struct gcpro gcpro1, gcpro2; int count = specpdl_ptr - specpdl; Lisp_Object args[6]; + int input_file_statable_p; GCPRO2 (filename, newname); CHECK_STRING (filename, 0); @@ -1614,6 +1623,24 @@ A prefix arg makes KEEP-TIME non-nil.") record_unwind_protect (close_file_unwind, make_number (ifd)); + /* We can only copy regular files and symbolic links. Other files are not + copyable by us. */ + input_file_statable_p = (fstat (ifd, &st) >= 0); + +#if defined (S_ISREG) && defined (S_ISLNK) + if (input_file_statable_p) + { + if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) + { +#if defined (EISDIR) + /* Get a better looking error message. */ + errno = EISDIR; +#endif /* EISDIR */ + report_file_error ("Non-regular file", Fcons (filename, Qnil)); + } + } +#endif /* S_ISREG && S_ISLNK */ + #ifdef VMS /* Create the copy file with the same record format as the input file */ ofd = sys_creat (XSTRING (newname)->data, 0666, ifd); @@ -1632,7 +1659,7 @@ A prefix arg makes KEEP-TIME non-nil.") report_file_error ("I/O error", Fcons (newname, Qnil)); immediate_quit = 0; - if (fstat (ifd, &st) >= 0) + if (input_file_statable_p) { if (!NILP (keep_date)) { |