Init

ucb/groups.c

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 1980 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1980 Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif not lint
+
+#ifndef lint
+static	char sccsid[] = "@(#)groups.c 1.1 94/10/31 SMI"; /* from UCB 5.1 5/31/85 */
+#endif
+
+/*
+ * groups
+ */
+
+#include <sys/param.h>
+#include <grp.h>
+#include <pwd.h>
+#include <stdio.h>
+
+int	groups[NGROUPS];
+
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	int ngroups, i, j;
+	char *sep = "";
+	register struct group *gr;
+	struct passwd *pw;
+
+	if (argc > 1) {
+		for (i=1; i < argc ; i++)
+        		showgroups(argv[i]);
+		exit(0) ;
+	}
+
+	ngroups = getgroups(NGROUPS, groups);
+	if ((pw = getpwuid(getuid())) == NULL) {
+		fprintf(stderr, "groups: could not find passwd entry\n");
+		exit(1);
+	}
+
+	for (i = 0; i < ngroups; i++) {
+		gr = getgrgid(groups[i]);
+		if (gr == NULL) {
+			printf("%s%d", sep, groups[i]);
+			sep = " ";
+			continue;
+		}
+		printf("%s%s", sep, gr->gr_name);
+		sep = " ";
+	}
+	printf("\n");
+	exit(0);
+	/* NOTREACHED */
+}
+
+showgroups(user)
+	register char *user;
+{
+	register struct group *gr;
+	register struct passwd *pw;
+	register char **cp;
+	char *sep = "";
+	int pwgid_printed = 0 ;
+
+	if ((pw = getpwnam(user)) == NULL) {
+		fprintf(stderr, "groups: %s : No such user\n", user);
+		return;
+	}
+	setgrent() ;
+	printf("%s : ", user) ;
+	while (gr = getgrent()) {
+		if (pw->pw_gid == gr->gr_gid) {
+			/* 
+			 * To avoid duplicate group entries 
+			 */
+			if (pwgid_printed==0) {
+			    printf("%s%s", sep, gr->gr_name);
+			    sep = " ";
+			    pwgid_printed = 1 ;
+			}
+			continue ;
+		}	
+		for (cp = gr->gr_mem; cp && *cp; cp++)
+			if (strcmp(*cp, user) == 0) {
+				printf("%s%s", sep, gr->gr_name);
+				sep = " ";
+				break;
+			}
+	}
+	printf("\n");
+	endgrent() ;
+}