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 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 /* 43 * groups - show group memberships 44 */ 45 /* LINTLIBRARY PROTOLIB1 */ 46 47 #include <grp.h> 48 #include <pwd.h> 49 #include <stdio.h> 50 #include <unistd.h> 51 #include <stdlib.h> 52 53 extern struct group *getgrgid(); 54 extern struct passwd *getpwnam(); 55 extern int _getgroupsbymember(const char *, gid_t[], int, int); 56 57 static void showgroups(); 58 59 static int ngroups_max; 60 61 int 62 main(int argc, char *argv[]) 63 { 64 int xval = 0; 65 struct passwd *pw; 66 67 ngroups_max = sysconf(_SC_NGROUPS_MAX); 68 69 if (ngroups_max < 0) { 70 (void) fprintf(stderr, 71 "groups: could not get configuration info\n"); 72 exit(1); 73 } 74 75 if (ngroups_max == 0) 76 exit(0); 77 78 if (argc == 1) { 79 80 if ((pw = getpwuid(getuid())) == NULL) { 81 (void) fprintf(stderr, "groups: No passwd entry\n"); 82 xval = 1; 83 } else 84 showgroups(pw); 85 86 } else while (*++argv) { 87 88 if ((pw = getpwnam(*argv)) == NULL) { 89 (void) fprintf(stderr, 90 "groups: %s : No such user\n", *argv); 91 xval = 1; 92 } else { 93 if (argc > 2) 94 (void) printf("%s : ", *argv); 95 showgroups(pw); 96 } 97 } 98 99 return (xval); 100 101 } 102 103 static void 104 showgroups(struct passwd *pw) 105 { 106 struct group *gr; 107 static gid_t *groups = NULL; 108 int ngroups; 109 int i; 110 111 if (groups == NULL) { 112 if ((groups = (gid_t *)calloc((uint_t)ngroups_max, 113 sizeof (gid_t))) == 0) { 114 (void) fprintf(stderr, 115 "allocation of %d bytes failed\n", 116 ngroups_max * sizeof (gid_t)); 117 exit(1); 118 } 119 } 120 groups[0] = pw->pw_gid; 121 122 ngroups = _getgroupsbymember(pw->pw_name, groups, ngroups_max, 1); 123 124 if (gr = getgrgid(groups[0])) 125 (void) printf("%s", gr->gr_name); 126 else 127 (void) printf("%d", (int)pw->pw_gid); 128 129 for (i = 1; i < ngroups; i++) { 130 if ((gr = getgrgid(groups[i]))) 131 (void) printf(" %s", gr->gr_name); 132 else 133 (void) printf(" %d", (int)groups[i]); 134 } 135 136 (void) printf("\n"); 137 } 138