diff options
author | des <des@FreeBSD.org> | 2000-08-31 15:56:15 +0000 |
---|---|---|
committer | des <des@FreeBSD.org> | 2000-08-31 15:56:15 +0000 |
commit | 355bb561f315d2a018c85c311e1442e16456a4e5 (patch) | |
tree | 6c4b19860d119c77a6c3fa7d0fadfcab141cbcf1 /lib/libc/gen/dirname.c | |
parent | 97d4af5bf107202b943686c90718b7c16e5ffe86 (diff) | |
download | FreeBSD-src-355bb561f315d2a018c85c311e1442e16456a4e5.zip FreeBSD-src-355bb561f315d2a018c85c311e1442e16456a4e5.tar.gz |
Import XPG4-compliant basename(3) and dirname(3) from OpenBSD.
The man pages need some adjustments.
PR: 12960, 12962
Submitted by: James Howard <howardjp@wam.umd.edu>
Obtained from: OpenBSD
Diffstat (limited to 'lib/libc/gen/dirname.c')
-rw-r--r-- | lib/libc/gen/dirname.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/lib/libc/gen/dirname.c b/lib/libc/gen/dirname.c new file mode 100644 index 0000000..5f6019e --- /dev/null +++ b/lib/libc/gen/dirname.c @@ -0,0 +1,79 @@ +/* $OpenBSD: dirname.c,v 1.4 1999/05/30 17:10:30 espie Exp $ */ +/* $FreeBSD$ */ + +/* + * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef lint +static char rcsid[] = "$OpenBSD: dirname.c,v 1.4 1999/05/30 17:10:30 espie Exp $"; +#endif /* not lint */ + +#include <errno.h> +#include <libgen.h> +#include <string.h> +#include <sys/param.h> + +char * +dirname(path) + const char *path; +{ + static char bname[MAXPATHLEN]; + register const char *endp; + + /* Empty or NULL string gets treated as "." */ + if (path == NULL || *path == '\0') { + (void)strcpy(bname, "."); + return(bname); + } + + /* Strip trailing slashes */ + endp = path + strlen(path) - 1; + while (endp > path && *endp == '/') + endp--; + + /* Find the start of the dir */ + while (endp > path && *endp != '/') + endp--; + + /* Either the dir is "/" or there are no slashes */ + if (endp == path) { + (void)strcpy(bname, *endp == '/' ? "/" : "."); + return(bname); + } else { + do { + endp--; + } while (endp > path && *endp == '/'); + } + + if (endp - path + 1 > sizeof(bname)) { + errno = ENAMETOOLONG; + return(NULL); + } + (void)strncpy(bname, path, endp - path + 1); + bname[endp - path + 1] = '\0'; + return(bname); +} |