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869d3d318

Denis Vlasenko

2008-05-22

FAILED Duration: 26s

Subject

last: optional alternative sysv-like implementation (by Patricia Muscalu )

Binary

No binary (build failed)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

—

Build Log

(log yok)

Commit Diff GitHub →

include/usage.h +8 -2 miscutils/Config.in +8 -0 miscutils/last.c +8 -0 miscutils/last_fancy.c +283 -0

include/usage.h+8 -2

@@ -3504,9 +3504,15 @@
	"lash is deprecated, please use hush"

	#define last_trivial_usage \
-	""
+	""USE_FEATURE_LAST_FANCY("[-HW] [-f file]")
	#define last_full_usage "\n\n" \
-	"Show listing of the last users that logged into the system"
+	"Show listing of the last users that logged into the system" \
+	USE_FEATURE_LAST_FANCY( "\n" \
+	"\nOptions:" \
+	"\n -H Show header line" \
+	"\n -W Display with no host column truncation" \
+	"\n -f file Read from file instead of /var/log/wtmp" \
+	)

	#define sha1sum_trivial_usage \
	"[OPTION] [FILEs...]" \

miscutils/Config.in+8 -0

@@ -229,6 +229,14 @@ config LAST
	help
	'last' displays a list of the last users that logged into the system.

+	config FEATURE_LAST_FANCY
+	bool "Fancy output"
+	default n
+	depends on LAST
+	help
+	'last' displays detailed information about the last users that
+	logged into the system (mimics sysvinit last). +900 bytes.
+
	config LESS
	bool "less"
	default n

miscutils/last.c+8 -0

@@ -26,6 +26,12 @@
	#error struct utmp member char[] size(s) have changed!
	#endif

+	#if ENABLE_FEATURE_LAST_FANCY
+
+	#include "last_fancy.c"
+
+	#else
+
	int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
	int last_main(int argc, char **argv ATTRIBUTE_UNUSED)
	{
@@ -92,3 +98,5 @@ int last_main(int argc, char **argv ATTRIBUTE_UNUSED)

	fflush_stdout_and_exit(EXIT_SUCCESS);
	}
+
+	#endif

miscutils/last_fancy.c+283 -0

@@ -0,0 +1,283 @@
+	/* vi: set sw=4 ts=4: */
+	/*
+	* (sysvinit like) last implementation
+	*
+	* Copyright (C) 2008 by Patricia Muscalu <[email protected]>
+	*
+	* Licensed under the GPLv2 or later, see the file LICENSE in this tarball.
+	*/
+
+	#define HEADER_FORMAT "%-8.8s %-12.12s %-.s %-16.16s %-7.7s %-12.12s\n"
+	#define HEADER_LINE "USER", "TTY", \
+	INET_ADDRSTRLEN, INET_ADDRSTRLEN, "HOST", "LOGIN", " TIME", ""
+	#define HEADER_LINE_WIDE "USER", "TTY", \
+	INET6_ADDRSTRLEN, INET6_ADDRSTRLEN, "HOST", "LOGIN", " TIME", ""
+
+	enum {
+	NORMAL,
+	LOGGED,
+	DOWN,
+	REBOOT,
+	CRASH,
+	GONE
+	};
+
+	enum {
+	LAST_OPT_W = (1 << 0), /* -W wide */
+	LAST_OPT_f = (1 << 1), /* -f input file */
+	LAST_OPT_H = (1 << 2), /* -H header */
+	};
+
+	#define show_wide (option_mask32 & LAST_OPT_W)
+
+	static void show_entry(struct utmp *ut, int state, time_t dur_secs)
+	{
+	unsigned days, hours, mins;
+	char duration[32];
+	char login_time[17];
+	char logout_time[8];
+	const char *logout_str;
+	const char *duration_str;
+
+	safe_strncpy(login_time, ctime(&(ut->ut_time)), 17);
+	snprintf(logout_time, 8, "- %s", ctime(&dur_secs) + 11);
+
+	dur_secs = MAX(dur_secs - (time_t)ut->ut_tv.tv_sec, (time_t)0);
+	/* unsigned int is easier to divide than time_t (which may be signed long) */
+	mins = dur_secs / 60;
+	days = mins / (24*60);
+	mins = mins % (24*60);
+	hours = mins / 60;
+	mins = mins % 60;
+
+	if (days) {
+	sprintf(duration, "(%u+%02u:%02u)", days, hours, mins);
+	} else {
+	sprintf(duration, " (%02u:%02u)", hours, mins);
+	}
+
+	logout_str = logout_time;
+	duration_str = duration;
+	switch (state) {
+	case NORMAL:
+	break;
+	case LOGGED:
+	logout_str = " still";
+	duration_str = "logged in";
+	break;
+	case DOWN:
+	logout_str = "- down ";
+	break;
+	case REBOOT:
+	break;
+	case CRASH:
+	logout_str = "- crash";
+	break;
+	case GONE:
+	logout_str = " gone";
+	duration_str = "- no logout";
+	break;
+	}
+
+	printf(HEADER_FORMAT,
+	ut->ut_name,
+	ut->ut_line,
+	show_wide ? INET6_ADDRSTRLEN : INET_ADDRSTRLEN,
+	show_wide ? INET6_ADDRSTRLEN : INET_ADDRSTRLEN,
+	ut->ut_host,
+	login_time,
+	logout_str,
+	duration_str);
+	}
+
+	static int get_ut_type(struct utmp *ut)
+	{
+	if (ut->ut_line[0] == '~') {
+	if (strncmp(ut->ut_user, "shutdown", sizeof("shutdown")-1) == 0) {
+	return SHUTDOWN_TIME;
+	}
+	if (strncmp(ut->ut_user, "reboot", sizeof("reboot")-1) == 0) {
+	return BOOT_TIME;
+	}
+	if (strncmp(ut->ut_user, "runlevel", sizeof("runlevel")-1) == 0) {
+	return RUN_LVL;
+	}
+	return ut->ut_type;
+	}
+
+	if (ut->ut_name[0] == 0) {
+	return DEAD_PROCESS;
+	}
+
+	if ((ut->ut_type != DEAD_PROCESS)
+	&& (strcmp(ut->ut_name, "LOGIN") != 0)
+	&& ut->ut_name[0]
+	&& ut->ut_line[0]
+	) {
+	ut->ut_type = USER_PROCESS;
+	}
+
+	if (strcmp(ut->ut_name, "date") == 0) {
+	if (ut->ut_line[0] == '\|') {
+	return OLD_TIME;
+	}
+	if (ut->ut_line[0] == '{') {
+	return NEW_TIME;
+	}
+	}
+	return ut->ut_type;
+	}
+
+	static int is_runlevel_shutdown(struct utmp *ut)
+	{
+	if (((ut->ut_pid & 255) == '0') \|\| ((ut->ut_pid & 255) == '6')) {
+	return 1;
+	}
+
+	return 0;
+	}
+
+	int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+	int last_main(int argc ATTRIBUTE_UNUSED, char **argv)
+	{
+	struct utmp ut;
+	const char *filename = _PATH_WTMP;
+	llist_t *zlist;
+	off_t pos;
+	time_t start_time;
+	time_t boot_time;
+	time_t down_time;
+	int file;
+	unsigned opt;
+	smallint going_down;
+	smallint boot_down;
+
+	opt = getopt32(argv, "Wf:" /* "H" */, &filename);
+	#ifdef BUT_UTIL_LINUX_LAST_HAS_NO_SUCH_OPT
+	if (opt & LAST_OPT_H) {
+	/* Print header line */
+	if (opt & LAST_OPT_W) {
+	printf(HEADER_FORMAT, HEADER_LINE_WIDE);
+	} else {
+	printf(HEADER_FORMAT, HEADER_LINE);
+	}
+	}
+	#endif
+
+	file = xopen(filename, O_RDONLY);
+	if (full_read(file, &ut, sizeof(ut)) != sizeof(ut)) {
+	struct stat st;
+	fstat(file, &st);
+	start_time = st.st_ctime;
+	goto exit;
+	}
+	start_time = ut.ut_time;
+
+	time(&down_time);
+	going_down = 0;
+	boot_down = NORMAL; /* 0 */
+	zlist = NULL;
+	boot_time = 0;
+	pos = 0;
+	for (;;) {
+	pos -= (off_t)sizeof(ut);
+	/* Bug? What if file changes size?
+	* What if size is not a multiple of sizeof(ut)? */
+	if (lseek(file, pos, SEEK_END) < 0) {
+	/* Beyond the beginning of the file boundary =>
+	* the whole file has been read. */
+	break;
+	}
+	if (full_read(file, &ut, sizeof(ut)) != sizeof(ut))
+	break;
+
+	switch (get_ut_type(&ut)) {
+	case SHUTDOWN_TIME:
+	down_time = ut.ut_time;
+	boot_down = DOWN;
+	going_down = 1;
+	break;
+	case RUN_LVL:
+	if (is_runlevel_shutdown(&ut)) {
+	down_time = ut.ut_time;
+	going_down = 1;
+	boot_down = DOWN;
+	}
+	break;
+	case BOOT_TIME:
+	strcpy(ut.ut_line, "system boot");
+	show_entry(&ut, REBOOT, down_time);
+	boot_down = CRASH;
+	going_down = 1;
+	break;
+	case DEAD_PROCESS:
+	if (!ut.ut_line[0]) {
+	break;
+	}
+	/* add_entry */
+	llist_add_to(&zlist, memcpy(xmalloc(sizeof(ut)), &ut, sizeof(ut)));
+	break;
+	case USER_PROCESS: {
+	int show;
+
+	if (!ut.ut_line[0]) {
+	break;
+	}
+	/* find_entry */
+	show = 1;
+	{
+	llist_t el, next;
+	for (el = zlist; el; el = next) {
+	struct utmp up = (struct utmp )el->data;
+	next = el->link;
+	if (strncmp(up->ut_line, ut.ut_line, UT_LINESIZE) == 0) {
+	if (show) {
+	show_entry(&ut, NORMAL, up->ut_time);
+	show = 0;
+	}
+	llist_unlink(&zlist, el);
+	free(el->data);
+	free(el);
+	}
+	}
+	}
+
+	if (show) {
+	int state = boot_down;
+
+	if (boot_time == 0) {
+	state = LOGGED;
+	/* Check if the process is alive */
+	if ((ut.ut_pid > 0)
+	&& (kill(ut.ut_pid, 0) != 0)
+	&& (errno == ESRCH)) {
+	state = GONE;
+	}
+	}
+	show_entry(&ut, state, boot_time);
+	}
+	/* add_entry */
+	llist_add_to(&zlist, memcpy(xmalloc(sizeof(ut)), &ut, sizeof(ut)));
+	break;
+	}
+	}
+
+	if (going_down) {
+	boot_time = ut.ut_time;
+	llist_free(zlist, free);
+	zlist = NULL;
+	going_down = 0;
+	}
+	}
+
+	if (ENABLE_FEATURE_CLEAN_UP) {
+	llist_free(zlist, free);
+	}
+
+	exit:
+	printf("\nwtmp begins %s", ctime(&start_time));
+
+	if (ENABLE_FEATURE_CLEAN_UP)
+	close(file);
+	fflush_stdout_and_exit(EXIT_SUCCESS);
+	}