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-rw-r--r--coreutils/who.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/coreutils/who.c b/coreutils/who.c
new file mode 100644
index 000000000..3da7ed1c7
--- /dev/null
+++ b/coreutils/who.c
@@ -0,0 +1,85 @@
+/* vi: set sw=4 ts=4: */
+/*----------------------------------------------------------------------
+ * Mini who is used to display user name, login time,
+ * idle time and host name.
+ *
+ * Author: Da Chen <dchen@ayrnetworks.com>
+ *
+ * This is a free document; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation:
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * Copyright (c) 2002 AYR Networks, Inc.
+ *----------------------------------------------------------------------
+ */
+
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <utmp.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <busybox.h>
+
+extern int who_main(int argc, char **argv)
+{
+ struct utmp *ut;
+ struct stat st;
+ int devlen, len;
+ time_t now, idle;
+
+ if (argc > 1)
+ show_usage();
+
+ setutent();
+ devlen = sizeof("/dev/") - 1;
+ printf("USER TTY IDLE FROM HOST\n");
+
+ while ((ut = getutent()) != NULL) {
+ char name[40];
+
+ if (ut->ut_user[0] && ut->ut_type == USER_PROCESS) {
+ len = strlen(ut->ut_line);
+ if (ut->ut_line[0] == '/') {
+ strncpy(name, ut->ut_line, len);
+ name[len] = '\0';
+ strcpy(ut->ut_line, ut->ut_line + devlen);
+ } else {
+ strcpy(name, "/dev/");
+ strncpy(name+devlen, ut->ut_line, len);
+ name[devlen+len] = '\0';
+ }
+
+ printf("%-10s %-8s ", ut->ut_user, ut->ut_line);
+
+ if (stat(name, &st) == 0) {
+ now = time(NULL);
+ idle = now - st.st_atime;
+
+ if (idle < 60)
+ printf("00:00m ");
+ else if (idle < (60 * 60))
+ printf("00:%02dm ", (int)(idle / 60));
+ else if (idle < (24 * 60 * 60))
+ printf("%02d:%02dm ", (int)(idle / (60 * 60)),
+ (int)(idle % (60 * 60)) / 60);
+ else if (idle < (24 * 60 * 60 * 365))
+ printf("%03ddays ", (int)(idle / (24 * 60 * 60)));
+ else
+ printf("%02dyears ", (int) (idle / (24 * 60 * 60 * 365)));
+ } else
+ printf("%-8s ", "?");
+
+ printf("%-12.12s %s\n", ctime(&(ut->ut_tv.tv_sec)) + 4, ut->ut_host);
+ }
+ }
+ endutent();
+
+ return 0;
+}
+
+