*: Switch to POSIX utmpx API

UTMP is SVID legacy, UTMPX is mandated by POSIX.

Glibc and uClibc have identical layout of UTMP and UTMPX, both of these
libc treat _PATH_UTMPX as _PATH_UTMP so from a user-perspective nothing
changes except the names of the API entrypoints.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

4 files changed, 24 insertions, 20 deletions

diff --git a/miscutils/last.c b/miscutils/last.c
index a144c7e..6d8b584 100644
--- a/miscutils/last.c
+++ b/miscutils/last.c
@@ -32,21 +32,21 @@
 
 #if defined UT_LINESIZE \
 	&& ((UT_LINESIZE != 32) || (UT_NAMESIZE != 32) || (UT_HOSTSIZE != 256))
-#error struct utmp member char[] size(s) have changed!
+#error struct utmpx member char[] size(s) have changed!
 #elif defined __UT_LINESIZE \
 	&& ((__UT_LINESIZE != 32) || (__UT_NAMESIZE != 64) || (__UT_HOSTSIZE != 256))
-#error struct utmp member char[] size(s) have changed!
+#error struct utmpx member char[] size(s) have changed!
 #endif
 
 #if EMPTY != 0 || RUN_LVL != 1 || BOOT_TIME != 2 || NEW_TIME != 3 || \
 	OLD_TIME != 4
-#error Values for the ut_type field of struct utmp changed
+#error Values for the ut_type field of struct utmpx changed
 #endif
 
 int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int last_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 {
-	struct utmp ut;
+	struct utmpx ut;
 	int n, file = STDIN_FILENO;
 	time_t t_tmp;
 	off_t pos;
diff --git a/miscutils/last_fancy.c b/miscutils/last_fancy.c
index 16ed9e9..8194e31 100644
--- a/miscutils/last_fancy.c
+++ b/miscutils/last_fancy.c
@@ -22,6 +22,10 @@
 #define HEADER_LINE_WIDE  "USER", "TTY", \
 	INET6_ADDRSTRLEN, INET6_ADDRSTRLEN, "HOST", "LOGIN", "  TIME", ""
 
+#if !defined __UT_LINESIZE && defined UT_LINESIZE
+# define __UT_LINESIZE UT_LINESIZE
+#endif
+
 enum {
 	NORMAL,
 	LOGGED,
@@ -39,7 +43,7 @@ enum {
 
 #define show_wide (option_mask32 & LAST_OPT_W)
 
-static void show_entry(struct utmp *ut, int state, time_t dur_secs)
+static void show_entry(struct utmpx *ut, int state, time_t dur_secs)
 {
 	unsigned days, hours, mins;
 	char duration[sizeof("(%u+02:02)") + sizeof(int)*3];
@@ -104,7 +108,7 @@ static void show_entry(struct utmp *ut, int state, time_t dur_secs)
 		duration_str);
 }
 
-static int get_ut_type(struct utmp *ut)
+static int get_ut_type(struct utmpx *ut)
 {
 	if (ut->ut_line[0] == '~') {
 		if (strcmp(ut->ut_user, "shutdown") == 0) {
@@ -142,7 +146,7 @@ static int get_ut_type(struct utmp *ut)
 	return ut->ut_type;
 }
 
-static int is_runlevel_shutdown(struct utmp *ut)
+static int is_runlevel_shutdown(struct utmpx *ut)
 {
 	if (((ut->ut_pid & 255) == '0') || ((ut->ut_pid & 255) == '6')) {
 		return 1;
@@ -154,7 +158,7 @@ static int is_runlevel_shutdown(struct utmp *ut)
 int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int last_main(int argc UNUSED_PARAM, char **argv)
 {
-	struct utmp ut;
+	struct utmpx ut;
 	const char *filename = _PATH_WTMP;
 	llist_t *zlist;
 	off_t pos;
@@ -242,9 +246,9 @@ int last_main(int argc UNUSED_PARAM, char **argv)
 			{
 				llist_t *el, *next;
 				for (el = zlist; el; el = next) {
-					struct utmp *up = (struct utmp *)el->data;
+					struct utmpx *up = (struct utmpx *)el->data;
 					next = el->link;
-					if (strncmp(up->ut_line, ut.ut_line, UT_LINESIZE) == 0) {
+					if (strncmp(up->ut_line, ut.ut_line, __UT_LINESIZE) == 0) {
 						if (show) {
 							show_entry(&ut, NORMAL, up->ut_tv.tv_sec);
 							show = 0;
diff --git a/miscutils/runlevel.c b/miscutils/runlevel.c
index 76231df..8558db8 100644
--- a/miscutils/runlevel.c
+++ b/miscutils/runlevel.c
@@ -29,19 +29,19 @@
 int runlevel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int runlevel_main(int argc UNUSED_PARAM, char **argv)
 {
-	struct utmp *ut;
+	struct utmpx *ut;
 	char prev;
 
-	if (argv[1]) utmpname(argv[1]);
+	if (argv[1]) utmpxname(argv[1]);
 
-	setutent();
-	while ((ut = getutent()) != NULL) {
+	setutxent();
+	while ((ut = getutxent()) != NULL) {
 		if (ut->ut_type == RUN_LVL) {
 			prev = ut->ut_pid / 256;
 			if (prev == 0) prev = 'N';
 			printf("%c %c\n", prev, ut->ut_pid % 256);
 			if (ENABLE_FEATURE_CLEAN_UP)
-				endutent();
+				endutxent();
 			return 0;
 		}
 	}
@@ -49,6 +49,6 @@ int runlevel_main(int argc UNUSED_PARAM, char **argv)
 	puts("unknown");
 
 	if (ENABLE_FEATURE_CLEAN_UP)
-		endutent();
+		endutxent();
 	return 1;
 }
diff --git a/miscutils/wall.c b/miscutils/wall.c
index bb709ee..50658f4 100644
--- a/miscutils/wall.c
+++ b/miscutils/wall.c
@@ -32,7 +32,7 @@
 int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int wall_main(int argc UNUSED_PARAM, char **argv)
 {
-	struct utmp *ut;
+	struct utmpx *ut;
 	char *msg;
 	int fd;
 
@@ -46,8 +46,8 @@ int wall_main(int argc UNUSED_PARAM, char **argv)
 	msg = xmalloc_read(fd, NULL);
 	if (ENABLE_FEATURE_CLEAN_UP && argv[1])
 		close(fd);
-	setutent();
-	while ((ut = getutent()) != NULL) {
+	setutxent();
+	while ((ut = getutxent()) != NULL) {
 		char *line;
 		if (ut->ut_type != USER_PROCESS)
 			continue;
@@ -56,7 +56,7 @@ int wall_main(int argc UNUSED_PARAM, char **argv)
 		free(line);
 	}
 	if (ENABLE_FEATURE_CLEAN_UP) {
-		endutent();
+		endutxent();
 		free(msg);
 	}
 	return EXIT_SUCCESS;