backupfile, chdir-long, fts, savedir: make safer

[gnulib.git] / ChangeLog

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 2009-09-02  Eric Blake  <ebb9@byu.net>
 
+       backupfile, chdir-long, fts, savedir: make safer
+       * lib/backupfile.c (includes): Use "dirent--.h", since
+       numbered_backup can write to stderr during readdir.
+       * lib/savedir.c (includes): Likewise.
+       * lib/chdir-long.c (includes): Use "fcntl--.h", since openat
+       emulation can write to stderr on failure.
+       * lib/fts.c (includes) [!_LIBC]: Likewise for opendir and openat.
+       * lib/getcwd.c: Document why opendir_safer is unused.
+       * lib/glob.c: Likewise.
+       * lib/scandir.c: Likewise.
+       * lib/openat-proc.c: Likewise, for open_safer.
+       * modules/backupfile (Depends-on): Add dirent-safer.
+       * modules/savedir (Depends-on): Likewise.
+       * modules/fts (Depends-on): Add dirent-safer and openat-safer.
+       * modules/chdir-long (Depends-on): Add openat-safer.
+
+       openat-safer: new module
+       * modules/openat-safer: New file.
+       * lib/openat-safer.c: Likewise.
+       * m4/fcntl-safer.m4 (gl_OPENAT_SAFER): New macro.
+       * lib/fcntl-safer.h (openat_safer): Declare.
+       * lib/fcntl--.h (openat): Override.
+       * MODULES.html.sh (File descriptor based I/O): Mention it.
+       * lib/openat.h: Add double-inclusion guards.
+       * lib/openat.c (includes): Only include "fcntl-safer.h", not
+       "fcntl--.h", so we can implement openat.
+       * modules/openat-safer-tests: New test.
+       * tests/test-openat-safer.c: New file.
+
+       dirent-safer: new module
+       * modules/dirent-safer: New file.
+       * lib/dirent--.h: Likewise.
+       * lib/dirent-safer.h: Likewise.
+       * lib/opendir-safer.c: Likewise.
+       * m4/dirent-safer.m4: Likewise.
+       * MODULES.html.sh (Enhancements for POSIX:2008): Mention it.
+       * modules/dirent-safer-tests: New test.
+       * tests/test-dirent-safer.c: New file.
+       * lib/fdopendir.c (includes): Ensure fdopendir is also safe.
+
+       fdopendir: optimize on mingw
+       * lib/unistd.in.h (_gl_directory_name): New prototype.
+       * lib/fchdir.c (_gl_directory_name): Implement it.
+       (fchdir): Use it to simplify implementation.
+       * lib/fdopendir.c (fdopendir) [REPLACE_FCHDIR]: Use metadata from
+       fchdir, when available, to avoid calling [f]chdir().
+
        fdopendir: split into its own module
        * lib/openat.c (fdopendir): Move...
        * lib/fdopendir.c: ...into new file.