usr/src/cmd/basename/basename.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
  24  *
  25  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28
  29 #include <locale.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33
  34 int
  35 main(int argc, char **argv)
  36 {
  37         char    *p;
  38         char    *string;
  39         char    *suffix;
  40
  41         /*
  42          * For better performance, defer the setlocale()/textdomain()
  43          * calls until they get really required.
  44          */
  45 #if !defined(TEXT_DOMAIN)
  46 #define TEXT_DOMAIN "SYS_TEST"
  47 #endif
  48         if (argc == 1) {
  49                 (void) puts(".");
  50                 return (0);
  51         }
  52
  53         if (strcmp(argv[1], "--") == 0) {
  54                 argv++;
  55                 argc--;
  56                 if (argc == 1) {
  57                         (void) puts(".");
  58                         return (0);
  59                 }
  60         }
  61
  62         if (argc > 3) {
  63                 (void) setlocale(LC_ALL, "");
  64                 (void) textdomain(TEXT_DOMAIN);
  65                 (void) fputs(gettext("Usage: basename string [ suffix ]\n"),
  66                     stderr);
  67                 return (1);
  68         }
  69
  70         string = argv[1];
  71         suffix = (argc == 2) ? NULL : argv[2];
  72
  73         if (*string == '\0') {
  74                 (void) puts(".");
  75                 return (0);
  76         }
  77
  78         /* remove trailing slashes */
  79         p = string + strlen(string) - 1;
  80         while (p >= string && *p == '/')
  81                 *p-- = '\0';
  82
  83         if (*string == '\0') {
  84                 (void) puts("/");
  85                 return (0);
  86         }
  87
  88         /* skip to one past last slash */
  89         if ((p = strrchr(string, '/')) != NULL)
  90                 string = p + 1;
  91
  92         if (suffix == NULL) {
  93                 (void) puts(string);
  94                 return (0);
  95         }
  96
  97         /*
  98          * if a suffix is present and is not the same as the remaining
  99          * string and is identical to the last characters in the remaining
 100          * string, remove those characters from the string.
 101          */
 102         if (strcmp(string, suffix) != 0) {
 103                 p = string + strlen(string) - strlen(suffix);
 104                 if (strcmp(p, suffix) == 0)
 105                         *p = '\0';
 106         }
 107         (void) puts(string);
 108         return (0);
 109 }