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 (c) 1996, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 /* 28 * MKS Library -- basename -- produce base name of a file name 29 * NOTE: not standard SVID routine. 30 * 31 * Copyright 1985, 1995 by Mortice Kern Systems Inc. All rights reserved. 32 * 33 * james Partanen, June '95 34 * 35 */ 36 #ifdef M_RCSID 37 #ifndef lint 38 static char rcsID[] = "$Header: /rd/src/libc/gen/rcs/base.c 1.26 1995/08/02 17:32:36 rodney Exp $"; 39 #endif 40 #endif 41 42 #include <string.h> 43 44 #define DIRNAME 0 45 #define BASENAME 1 46 47 #define M_FSDELIM(c) ((c)=='/') 48 #define M_DRDELIM(c) (0) 49 50 static char curdir[] = "."; 51 52 /*f 53 * Since the goal is essentially common: find the last occurring 54 * M_FSDELIM, and since most of the degenerate cases end up with the 55 * same result, let's do most of the work in one function. 56 * - check degenerate arg forms 57 * - deal with a possible drive specifier 58 * - deal with degenerate paths 59 * - find last non-trailing M_FSDELIM 60 * - deal with degenerate dirname 61 * - deal with general case, returning prefix or suffix based on type 62 */ 63 static char * 64 basedir(char *arg, int type) 65 { 66 register char *cp, *path; 67 68 if (arg==(char *)0 || *arg=='\0' || 69 (*arg=='.' && (arg[1]=='\0' || 70 (type==DIRNAME && arg[1]=='.' && arg[2]=='\0')))) 71 72 return curdir; /* arg NULL, empty, ".", or ".." in DIRNAME */ 73 74 if (M_DRDELIM(arg[1])) /* drive-specified pathnames */ 75 path = arg+2; 76 else 77 path = arg; 78 79 if (path[1]=='\0'&&M_FSDELIM(*path)) /* "/", or drive analog */ 80 return arg; 81 82 cp = strchr(path, '\0'); 83 cp--; 84 85 while (cp != path && M_FSDELIM(*cp)) 86 *(cp--) = '\0'; 87 88 for (;cp>path && !M_FSDELIM(*cp); cp--) 89 ; 90 91 if (!M_FSDELIM(*cp)) 92 if (type==DIRNAME && path!=arg) { 93 *path = '\0'; 94 return arg; /* curdir on the specified drive */ 95 } else 96 return (type==DIRNAME)?curdir:path; 97 else if (cp == path && type == DIRNAME) { 98 cp[1] = '\0'; 99 return arg; /* root directory involved */ 100 } else if (cp == path && cp[1] == '\0') 101 return(arg); 102 else if (type == BASENAME) 103 return ++cp; 104 *cp = '\0'; 105 return arg; 106 } 107 108 /*f 109 * Finds the dirname of the given file. Spec1170 conformant. 110 */ 111 char * 112 dirname(char *arg) 113 { 114 return(basedir(arg, DIRNAME)); 115 } 116 117 /*f 118 * Finds the basename of the given file. Spec1170 conformant. 119 */ 120 char * 121 basename(char *arg) 122 { 123 return(basedir(arg, BASENAME)); 124 } 125 126 #ifdef TEST_MAIN_BASE_C 127 #include <stdio.h> 128 129 int main(int argc, char **argv) 130 { 131 int cnt; 132 char arg[128]; 133 char *tmp; 134 135 if (argc>1) { 136 for (cnt=argc--;argc;argc--) { 137 tmp = strdup(argv[cnt-argc]); 138 printf("%s\t%s\n", 139 dirname(argv[cnt-argc]), 140 basename(tmp)); 141 free(tmp); 142 } 143 return 0; 144 } 145 146 printf("enter pathnames less than 128 chars. enter 'q' to quit.\n"); 147 148 while(gets(arg)) 149 if (!strcmp(arg, "q")) 150 break; 151 else { 152 tmp = strdup(arg); 153 printf("%s\t%s\n", dirname(arg), basename(tmp)); 154 free(tmp); 155 } 156 157 return 0; 158 } 159 #endif /* TEST_MAIN_BASE_C */ 160