* http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2002 AYR Networks, Inc.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ *
*----------------------------------------------------------------------
*/
+/* BB_AUDIT SUSv3 _NOT_ compliant -- missing options -b, -d, -l, -m, -p, -q, -r, -s, -t, -T, -u; Missing argument 'file'. */
-#include <stdio.h>
-#include <stdlib.h>
-#include <utmp.h>
-#include <sys/stat.h>
-#include <time.h>
-#include "busybox.h"
+//usage:#define who_trivial_usage
+//usage: "[-a]"
+//usage:#define who_full_usage "\n\n"
+//usage: "Show who is logged on\n"
+//usage: "\nOptions:"
+//usage: "\n -a Show all"
-static const char * idle_string (time_t t)
+#include "libbb.h"
+
+static void idle_string(char *str6, time_t t)
{
- static char str[6];
-
- time_t s = time(NULL) - t;
+ t = time(NULL) - t;
- if (s < 60)
- return ".";
- if (s < (24 * 60 * 60)) {
- sprintf (str, "%02d:%02d",
- (int) (s / (60 * 60)),
- (int) ((s % (60 * 60)) / 60));
- return (const char *) str;
+ /*if (t < 60) {
+ str6[0] = '.';
+ str6[1] = '\0';
+ return;
+ }*/
+ if (t >= 0 && t < (24 * 60 * 60)) {
+ sprintf(str6, "%02d:%02d",
+ (int) (t / (60 * 60)),
+ (int) ((t % (60 * 60)) / 60));
+ return;
}
- return "old";
+ strcpy(str6, "old");
}
-int who_main(int argc, char **argv)
+int who_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int who_main(int argc UNUSED_PARAM, char **argv)
{
struct utmp *ut;
- struct stat st;
- char *name;
-
- if (argc > 1) {
- bb_show_usage();
- }
-
+ unsigned opt;
+
+ opt_complementary = "=0";
+ opt = getopt32(argv, "aH");
+ if (opt & 2) // -H
+ printf("USER\t\tTTY\t\tIDLE\tTIME\t\t HOST\n");
+
setutent();
- printf("USER TTY IDLE TIME HOST\n");
while ((ut = getutent()) != NULL) {
- if (ut->ut_user[0] && ut->ut_type == USER_PROCESS) {
- /* ut->ut_line is device name of tty - "/dev/" */
- name = concat_path_file("/dev", ut->ut_line);
- printf("%-10s %-8s %-8s %-12.12s %s\n", ut->ut_user, ut->ut_line,
- (stat(name, &st)) ? "?" : idle_string(st.st_atime),
- ctime((time_t*)&(ut->ut_tv.tv_sec)) + 4, ut->ut_host);
- free(name);
+ if (ut->ut_user[0]
+ && ((opt & 1) || ut->ut_type == USER_PROCESS)
+ ) {
+ char str6[6];
+ char name[sizeof("/dev/") + sizeof(ut->ut_line) + 1];
+ struct stat st;
+ time_t seconds;
+
+ str6[0] = '?';
+ str6[1] = '\0';
+ strcpy(name, "/dev/");
+ safe_strncpy(ut->ut_line[0] == '/' ? name : name + sizeof("/dev/")-1,
+ ut->ut_line,
+ sizeof(ut->ut_line)+1
+ );
+ if (stat(name, &st) == 0)
+ idle_string(str6, st.st_atime);
+ /* manpages say ut_tv.tv_sec *is* time_t,
+ * but some systems have it wrong */
+ seconds = ut->ut_tv.tv_sec;
+ /* How wide time field can be?
+ * "Nov 10 19:33:20": 15 chars
+ * "2010-11-10 19:33": 16 chars
+ */
+ printf("%-15.*s %-15.*s %-7s %-16.16s %.*s\n",
+ (int)sizeof(ut->ut_user), ut->ut_user,
+ (int)sizeof(ut->ut_line), ut->ut_line,
+ str6,
+ ctime(&seconds) + 4,
+ (int)sizeof(ut->ut_host), ut->ut_host
+ );
}
}
- endutent();
- return 0;
+ if (ENABLE_FEATURE_CLEAN_UP)
+ endutent();
+ return EXIT_SUCCESS;
}