2 * id - POSIX.2 user identity
4 * (INCOMPLETE -- supplementary groups for other users not yet done)
6 * usage: id [-Ggu] [-nr] [user]
8 * The default output format looks something like:
9 * uid=xxx(chet) gid=xx groups=aa(aname), bb(bname), cc(cname)
14 #include "bashtypes.h"
22 # include <sys/param.h>
25 #if !defined (HAVE_GETPW_DECLS)
26 extern struct passwd *getpwuid ();
28 extern struct group *getgrgid ();
34 #include "bashgetopt.h"
36 #define ID_ALLGROUPS 0x001 /* -G */
37 #define ID_GIDONLY 0x002 /* -g */
38 #define ID_USENAME 0x004 /* -n */
39 #define ID_USEREAL 0x008 /* -r */
40 #define ID_USERONLY 0x010 /* -u */
42 #define ID_FLAGSET(s) ((id_flags & (s)) != 0)
46 static uid_t ruid, euid;
47 static gid_t rgid, egid;
51 static int inituser ();
53 static int id_pruser ();
54 static int id_prgrp ();
55 static int id_prgroups ();
56 static int id_prall ();
66 reset_internal_getopt ();
67 while ((opt = internal_getopt (list, "Ggnru")) != -1)
71 case 'G': id_flags |= ID_ALLGROUPS; break;
72 case 'g': id_flags |= ID_GIDONLY; break;
73 case 'n': id_flags |= ID_USENAME; break;
74 case 'r': id_flags |= ID_USEREAL; break;
75 case 'u': id_flags |= ID_USERONLY; break;
83 user = list ? list->word->word : (char *)NULL;
85 /* Check for some invalid option combinations */
86 opt = ID_FLAGSET (ID_ALLGROUPS) + ID_FLAGSET (ID_GIDONLY) + ID_FLAGSET (ID_USERONLY);
87 if (opt > 1 || (opt == 0 && ((id_flags & (ID_USEREAL|ID_USENAME)) != 0)))
93 if (list && list->next)
99 if (inituser (user) < 0)
100 return (EXECUTION_FAILURE);
103 if (id_flags & ID_USERONLY)
104 opt += id_pruser ((id_flags & ID_USEREAL) ? ruid : euid);
105 else if (id_flags & ID_GIDONLY)
106 opt += id_prgrp ((id_flags & ID_USEREAL) ? rgid : egid);
107 else if (id_flags & ID_ALLGROUPS)
108 opt += id_prgroups (user);
110 opt += id_prall (user);
114 return (opt == 0 ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
125 pwd = getpwnam (uname);
128 builtin_error ("%s: no such user", uname);
131 ruid = euid = pwd->pw_uid;
132 rgid = egid = pwd->pw_gid;
136 ruid = current_user.uid;
137 euid = current_user.euid;
138 rgid = current_user.gid;
139 egid = current_user.egid;
144 /* Print the name or value of user ID UID. */
149 struct passwd *pwd = NULL;
153 if (id_flags & ID_USENAME)
155 pwd = getpwuid (uid);
160 printf ("%s", pwd->pw_name);
162 printf ("%u", (unsigned) uid);
167 /* Print the name or value of group ID GID. */
173 struct group *grp = NULL;
177 if (id_flags & ID_USENAME)
179 grp = getgrgid (gid);
185 printf ("%s", grp->gr_name);
187 printf ("%u", (unsigned) gid);
196 int *glist, ng, i, r;
208 builtin_error ("supplementary groups for other users not yet implemented");
214 glist = get_group_array (&ng);
216 for (i = 0; i < ng; i++)
217 if (glist[i] != rgid && glist[i] != egid)
230 int r, i, ng, *glist;
235 printf ("uid=%u", (unsigned) ruid);
236 pwd = getpwuid (ruid);
240 printf ("(%s)", pwd->pw_name);
242 printf (" gid=%u", (unsigned) rgid);
243 grp = getgrgid (rgid);
247 printf ("(%s)", grp->gr_name);
251 printf (" euid=%u", (unsigned) euid);
252 pwd = getpwuid (euid);
256 printf ("(%s)", pwd->pw_name);
261 printf (" egid=%u", (unsigned) egid);
262 grp = getgrgid (egid);
266 printf ("(%s)", grp->gr_name);
271 builtin_error ("supplementary groups for other users not yet implemented");
277 glist = get_group_array (&ng);
281 for (i = 0; i < ng; i++)
285 printf ("%u", (unsigned) glist[i]);
286 grp = getgrgid (glist[i]);
290 printf ("(%s)", grp->gr_name);
297 "return information about user identity",
301 struct builtin id_struct = {
306 "id [user]\n\tid -G [-n] [user]\n\tid -g [-nr] [user]\n\tid -u [-nr] [user]",