/* $OpenBSD: basename.c,v 1.6 2003/06/10 22:20:44 deraadt Exp $ */ /* $NetBSD: basename.c,v 1.9 1995/09/02 05:29:46 jtc Exp $ */ /*- * Copyright (c) 1991, 1993, 1994 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 copyright[] = "@(#) Copyright (c) 1991, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)basename.c 8.4 (Berkeley) 5/4/95"; #endif static char rcsid[] = "$OpenBSD: basename.c,v 1.6 2003/06/10 22:20:44 deraadt Exp $"; #endif /* not lint */ #include #include #include #include #include void usage(void); int main(int argc, char *argv[]) { char *p; setlocale(LC_ALL, ""); if (argc != 2 && argc != 3) usage(); argc--; argv++; /* * (1) If string is // it is implementation defined whether steps (2) * through (5) are skipped or processed. * * (2) If string consists entirely of slash characters, string shall * be set to a single slash character. In this case, skip steps * (3) through (5). */ for (p = *argv;; ++p) { if (!*p) { if (p > *argv) (void)putchar('/'); (void)putchar('\n'); exit(0); } if (*p != '/') break; } /* * (3) If there are any trailing slash characters in string, they * shall be removed. */ for (; *p; ++p) continue; while (*--p == '/') continue; *++p = '\0'; /* * (4) If there are any slash characters remaining in string, the * prefix of string up to an including the last slash character * in string shall be removed. */ while (--p >= *argv) if (*p == '/') break; ++p; /* * (5) If the suffix operand is present, is not identical to the * characters remaining in string, and is identical to a suffix * of the characters remaining in string, the suffix suffix * shall be removed from string. */ if (*++argv) { int suffixlen, stringlen, off; suffixlen = strlen(*argv); stringlen = strlen(p); if (suffixlen < stringlen) { off = stringlen - suffixlen; if (!strcmp(p + off, *argv)) p[off] = '\0'; } } (void)puts(p); exit(0); } void usage(void) { (void)fprintf(stderr, "usage: basename string [suffix]\n"); exit(1); }