1 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 2 /* All Rights Reserved */ 3 4 5 /* 6 * Copyright (c) 1980 Regents of the University of California. 7 * All rights reserved. The Berkeley software License Agreement 8 * specifies the terms and conditions for redistribution. 9 */ 10 11 /* 12 * Copyright (c) 1983, 1984 1985, 1986, 1987, 1988, Sun Microsystems, Inc. 13 * All Rights Reserved. 14 */ 15 16 #ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.1 */ 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 int groups[NGROUPS_UMAX]; 28 29 main(argc, argv) 30 int argc; 31 char *argv[]; 32 { 33 int ngroups, i, j; 34 char *sep = ""; 35 register struct group *gr; 36 struct passwd *pw; 37 38 if (argc > 1) { 39 for (i=1; i < argc ; i++) 40 showgroups(argv[i]); 41 exit(0) ; 42 } 43 44 ngroups = getgroups(NGROUPS_UMAX, groups); 45 if ((pw = getpwuid(getuid())) == NULL) { 46 fprintf(stderr, "groups: could not find passwd entry\n"); 47 exit(1); 48 } 49 50 for (i = 0; i < ngroups; i++) { 51 gr = getgrgid(groups[i]); 52 if (gr == NULL) { 53 printf("%s%d", sep, groups[i]); 54 sep = " "; 55 continue; 56 } 57 printf("%s%s", sep, gr->gr_name); 58 sep = " "; 59 } 60 printf("\n"); 61 exit(0); 62 /* NOTREACHED */ 63 } 64 65 showgroups(user) 66 register char *user; 67 { 68 register struct group *gr; 69 register struct passwd *pw; 70 register 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