/* If nonzero, output only the SELinux context. */
static bool just_context = 0;
-
-static void print_user (uid_t uid);
-static void print_full_info (const char *username);
-
+/* If true, delimit entries with NUL characters, not whitespace */
+static bool opt_zero = false;
+/* If true, output the list of all group IDs. -G */
+static bool just_group_list = false;
+/* If true, output only the group ID(s). -g */
+static bool just_group = false;
+/* If true, output real UID/GID instead of default effective UID/GID. -r */
+static bool use_real = false;
+/* If true, output only the user ID(s). -u */
+static bool just_user = false;
+/* True unless errors have been encountered. */
+static bool ok = true;
+/* If true, we are using multiple users. Terminate -G with double NUL. */
+static bool multiple_users = false;
/* If true, output user/group name instead of ID number. -n */
static bool use_name = false;
static uid_t ruid, euid;
static gid_t rgid, egid;
-/* True unless errors have been encountered. */
-static bool ok = true;
-
/* The SELinux context. Start with a known invalid value so print_full_info
knows when 'context' has not been set to a meaningful value. */
static char *context = NULL;
+static void print_user (uid_t uid);
+static void print_full_info (const char *username);
+static void print_stuff (const char *pw_name);
+
static struct option const longopts[] =
{
{"context", no_argument, NULL, 'Z'},
emit_try_help ();
else
{
- printf (_("Usage: %s [OPTION]... [USER]\n"), program_name);
+ printf (_("Usage: %s [OPTION]... [USER]...\n"), program_name);
fputs (_("\
-Print user and group information for the specified USER,\n\
+Print user and group information for each specified USER,\n\
or (when USER omitted) for the current user.\n\
\n"),
stdout);
int optc;
int selinux_enabled = (is_selinux_enabled () > 0);
bool smack_enabled = is_smack_enabled ();
- bool opt_zero = false;
char *pw_name = NULL;
- /* If true, output the list of all group IDs. -G */
- bool just_group_list = false;
- /* If true, output only the group ID(s). -g */
- bool just_group = false;
- /* If true, output real UID/GID instead of default effective UID/GID. -r */
- bool use_real = false;
- /* If true, output only the user ID(s). -u */
- bool just_user = false;
-
initialize_main (&argc, &argv);
set_program_name (argv[0]);
setlocale (LC_ALL, "");
}
size_t n_ids = argc - optind;
- if (1 < n_ids)
- {
- error (0, 0, _("extra operand %s"), quote (argv[optind + 1]));
- usage (EXIT_FAILURE);
- }
if (n_ids && just_context)
die (EXIT_FAILURE, 0,
die (EXIT_FAILURE, 0, _("can't get process context"));
}
- if (n_ids == 1)
+ if (n_ids >= 1)
{
- struct passwd *pwd = NULL;
- const char *spec = argv[optind];
- /* Disallow an empty spec here as parse_user_spec() doesn't
- give an error for that as it seems it's a valid way to
- specify a noop or "reset special bits" depending on the system. */
- if (*spec)
+ multiple_users = n_ids > 1 ? true : false;
+ /* Changing the value of n_ids to the last index in the array where we
+ have the last possible user id. This helps us because we don't have
+ to declare a different variable to keep a track of where the
+ last username lies in argv[]. */
+ n_ids += optind;
+ /* For each username/userid to get its pw_name field */
+ for (; optind < n_ids; optind++)
{
- if (parse_user_spec (spec, &euid, NULL, NULL, NULL) == NULL)
+ struct passwd *pwd = NULL;
+ const char *spec = argv[optind];
+ /* Disallow an empty spec here as parse_user_spec() doesn't
+ give an error for that as it seems it's a valid way to
+ specify a noop or "reset special bits" depending on the system. */
+ if (*spec)
+ {
+ if (parse_user_spec (spec, &euid, NULL, NULL, NULL) == NULL)
+ {
+ /* parse_user_spec will only extract a numeric spec,
+ so we lookup that here to verify and also retrieve
+ the PW_NAME used subsequently in group lookup. */
+ pwd = getpwuid (euid);
+ }
+ }
+ if (pwd == NULL)
{
- /* parse_user_spec will only extract a numeric spec,
- so we lookup that here to verify and also retrieve
- the PW_NAME used subsequently in group lookup. */
- pwd = getpwuid (euid);
+ error (0, errno, _("%s: no such user"), quote (argv[optind]));
+ ok &= false;
+ continue;
}
+ pw_name = xstrdup (pwd->pw_name);
+ ruid = euid = pwd->pw_uid;
+ rgid = egid = pwd->pw_gid;
+ print_stuff (pw_name);
+ free (pw_name);
}
- if (pwd == NULL)
- die (EXIT_FAILURE, 0, _("%s: no such user"), quote (spec));
- pw_name = xstrdup (pwd->pw_name);
- ruid = euid = pwd->pw_uid;
- rgid = egid = pwd->pw_gid;
}
else
{
if (rgid == NO_GID && errno)
die (EXIT_FAILURE, errno, _("cannot get real GID"));
}
+ print_stuff (pw_name);
}
- if (just_user)
- {
- print_user (use_real ? ruid : euid);
- }
- else if (just_group)
- {
- if (!print_group (use_real ? rgid : egid, use_name))
- ok = false;
- }
- else if (just_group_list)
- {
- if (!print_group_list (pw_name, ruid, rgid, egid, use_name,
- opt_zero ? '\0' : ' '))
- ok = false;
- }
- else if (just_context)
- {
- fputs (context, stdout);
- }
- else
- {
- print_full_info (pw_name);
- }
- putchar (opt_zero ? '\0' : '\n');
-
- IF_LINT (free (pw_name));
return ok ? EXIT_SUCCESS : EXIT_FAILURE;
}
{
error (0, 0, _("cannot find name for user ID %s"),
uidtostr (uid));
- ok = false;
+ ok &= false;
}
}
quote (username));
else
error (0, errno, _("failed to get groups for the current process"));
- ok = false;
+ ok &= false;
return;
}
if (context)
printf (_(" context=%s"), context);
}
+
+/* Print information about the user based on the arguments passed. */
+
+static void
+print_stuff (const char *pw_name)
+{
+ if (just_user)
+ print_user (use_real ? ruid : euid);
+
+ /* print_group and print_group_lists functions return true on successful
+ execution but false if something goes wrong. We then AND this value with
+ the current value of 'ok' because we want to know if one of the previous
+ users faced a problem in these functions. This value of 'ok' is later used
+ to understand what status program should exit with. */
+ else if (just_group)
+ ok &= print_group (use_real ? rgid : egid, use_name);
+ else if (just_group_list)
+ ok &= print_group_list (pw_name, ruid, rgid, egid,
+ use_name, opt_zero ? '\0' : ' ');
+ else if (just_context)
+ fputs (context, stdout);
+ else
+ print_full_info (pw_name);
+
+ /* When printing records for more than 1 user, at the end of groups
+ of each user terminate the record with two consequent NUL characters
+ to make parsing and distinguishing between two records possible. */
+ if (opt_zero && just_group_list && multiple_users)
+ {
+ putchar ('\0');
+ putchar ('\0');
+ }
+ else
+ {
+ putchar (opt_zero ? '\0' : '\n');
+ }
+}
projects / thirdparty / coreutils.git / commitdiff
