diff options
Diffstat (limited to 'usr.bin/basename/basename.c')
| -rw-r--r-- | usr.bin/basename/basename.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/usr.bin/basename/basename.c b/usr.bin/basename/basename.c new file mode 100644 index 0000000..b369190 --- /dev/null +++ b/usr.bin/basename/basename.c @@ -0,0 +1,138 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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 +static char sccsid[] = "@(#)basename.c 8.3 (Berkeley) 4/2/94"; +#endif /* not lint */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +void usage __P((void)); + +int +main(argc, argv) + int argc; + char **argv; +{ + char *p; + int ch; + + while ((ch = getopt(argc, argv, "")) != EOF) + switch(ch) { + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (argc != 1 && argc != 2) + usage(); + + /* + * (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)printf("/\n"); + else + (void)printf("\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)printf("%s\n", p); + exit(0); +} + +void +usage() +{ + + (void)fprintf(stderr, "usage: basename string [suffix]\n"); + exit(1); +} |
