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 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 /* 41 * groups - show group memberships 42 */ 43 /* LINTLIBRARY PROTOLIB1 */ 44 45 #include <grp.h> 46 #include <pwd.h> 47 #include <stdio.h> 48 #include <unistd.h> 49 #include <stdlib.h> 50 51 extern struct group *getgrgid(); 52 extern struct passwd *getpwnam(); 53 extern int _getgroupsbymember(const char *, gid_t[], int, int); 54 55 static void showgroups(); 56 57 static int ngroups_max; 58 59 int 60 main(int argc, char *argv[]) 61 { 62 int xval = 0; 63 struct passwd *pw; 64 65 ngroups_max = sysconf(_SC_NGROUPS_MAX); 66 67 if (ngroups_max < 0) { 68 (void) fprintf(stderr, 69 "groups: could not get configuration info\n"); 70 exit(1); 71 } 72 73 if (ngroups_max == 0) 74 exit(0); 75 76 if (argc == 1) { 77 78 if ((pw = getpwuid(getuid())) == NULL) { 79 (void) fprintf(stderr, "groups: No passwd entry\n"); 80 xval = 1; 81 } else 82 showgroups(pw); 83 84 } else while (*++argv) { 85 86 if ((pw = getpwnam(*argv)) == NULL) { 87 (void) fprintf(stderr, 88 "groups: %s : No such user\n", *argv); 89 xval = 1; 90 } else { 91 if (argc > 2) 92 (void) printf("%s : ", *argv); 93 showgroups(pw); 94 } 95 } 96 97 return (xval); 98 99 } 100 101 static void 102 showgroups(struct passwd *pw) 103 { 104 struct group *gr; 105 static gid_t *groups = NULL; 106 int ngroups; 107 int i; 108 109 if (groups == NULL) { 110 if ((groups = (gid_t *)calloc((uint_t)ngroups_max, 111 sizeof (gid_t))) == 0) { 112 (void) fprintf(stderr, 113 "allocation of %d bytes failed\n", 114 ngroups_max * sizeof (gid_t)); 115 exit(1); 116 } 117 } 118 groups[0] = pw->pw_gid; 119 120 ngroups = _getgroupsbymember(pw->pw_name, groups, ngroups_max, 1); 121 122 if (gr = getgrgid(groups[0])) 123 (void) printf("%s", gr->gr_name); 124 else 125 (void) printf("%d", (int)pw->pw_gid); 126 127 for (i = 1; i < ngroups; i++) { 128 if ((gr = getgrgid(groups[i]))) 129 (void) printf(" %s", gr->gr_name); 130 else 131 (void) printf(" %d", (int)groups[i]); 132 } 133 134 (void) printf("\n"); 135 } 136