rsm@math.arizona.edu (Robert S. Maier) (10/15/89)
The following is a slight enhancement to the GNU `mv', written by Mike Parker. Like the BSD mv (the only one I'm familiar with) the GNU mv asks the user ``Override mode xxx for filename?'' if access(2) reports no write access to the target file. But write access can be denied for reasons other than bad permission flags. In particular it can be denied if the target is on a read-only filesystem, or if the target is a busy executable. The following diff uses perror(3) to report such problems. I have already found it useful... -- Robert S. Maier | Internet: rsm@math.arizona.edu [128.196.128.99] Dept. of Math. | UUCP: ..{allegra,cmcl2,hao!noao}!arizona!amethyst!rsm Univ. of Arizona | Bitnet: maier@arizrvax Tucson, AZ 85721 | FAX: +1 602 621 8322 U.S.A. | Voice: +1 602 621 6893 / +1 602 621 2617 ---------------------------------------------------------------------- 224,226c224,226 < if ((access (to, W_OK) < 0 || < (stb.st_mode & ((S_IWRITE>>6)*0111)) == 0) < && !force ) --- > if ( (access (to, W_OK) < 0 || > (stb.st_mode & ((S_IWRITE>>6)*0111)) == 0) > && !force ) 228,230c228,240 < printf ("Override mode %04o for `%s'? ", stb.st_mode & 0777 ,to); < if (! yes ()) < return; --- > if (errno == EACCES || (stb.st_mode & ((S_IWRITE>>6)*0111)) == 0) > { > printf ("Override mode %04o for `%s'? ", stb.st_mode & 0777 ,to); > if (! yes ()) > return; > } > else /* RO filesystem, text busy etc. */ > { > fprintf (stderr, "%s: no write access to `%s': ", > pgm, to); > perror (0); > return; > }