1 /* 2 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 7 /* All Rights Reserved */ 8 9 10 /* 11 * Copyright (c) 1980 Regents of the University of California. 12 * All rights reserved. The Berkeley software License Agreement 13 * specifies the terms and conditions for redistribution. 14 */ 15 16 #pragma ident "%Z%%M% %I% %E% SMI" 17 18 /* 19 * groups 20 */ 21 22 #include <sys/param.h> 23 #include <grp.h> 24 #include <pwd.h> 25 #include <stdio.h> 26 27 static void showgroups(char *); 28 29 int groups[NGROUPS_UMAX]; 30 31 int 32 main(int argc, char *argv[]) 33 { 34 int ngroups, i, j; 35 char *sep = ""; 36 struct group *gr; 37 struct passwd *pw; 38 39 if (argc > 1) { 40 for (i=1; i < argc ; i++) 41 showgroups(argv[i]); 42 exit(0) ; 43 } 44 45 ngroups = getgroups(NGROUPS_UMAX, groups); 46 if ((pw = getpwuid(getuid())) == NULL) { 47 fprintf(stderr, "groups: could not find passwd entry\n"); 48 exit(1); 49 } 50 51 for (i = 0; i < ngroups; i++) { 52 gr = getgrgid(groups[i]); 53 if (gr == NULL) { 54 printf("%s%d", sep, groups[i]); 55 sep = " "; 56 continue; 57 } 58 printf("%s%s", sep, gr->gr_name); 59 sep = " "; 60 } 61 printf("\n"); 62 return (0); 63 } 64 65 void 66 showgroups(char *user) 67 { 68 struct group *gr; 69 struct passwd *pw; 70 char **cp; 71 char *sep = ""; 72 int pwgid_printed = 0 ; 73 74 if ((pw = getpwnam(user)) == NULL) { 75 fprintf(stderr, "groups: %s : No such user\n", user); 76 return; 77 } 78 setgrent() ; 79 printf("%s : ", user) ; 80 while (gr = getgrent()) { 81 if (pw->pw_gid == gr->gr_gid) { 82 /* 83 * To avoid duplicate group entries 84 */ 85 if (pwgid_printed==0) { 86 printf("%s%s", sep, gr->gr_name); 87 sep = " "; 88 pwgid_printed = 1 ; 89 } 90 continue ; 91 } 92 for (cp = gr->gr_mem; cp && *cp; cp++) 93 if (strcmp(*cp, user) == 0) { 94 printf("%s%s", sep, gr->gr_name); 95 sep = " "; 96 break; 97 } 98 } 99 printf("\n"); 100 endgrent() ; 101 } 102