ps: add support for -l for !DESKTOP

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

procps/Config.src

@@ -90,12 +90,20 @@ config PS
 config FEATURE_PS_WIDE
 	bool "Enable wide output option (-w)"
 	default y
-	depends on PS
+	depends on PS && !DESKTOP
 	help
 	  Support argument 'w' for wide output.
 	  If given once, 132 chars are printed, and if given more
 	  than once, the length is unlimited.
 
+config FEATURE_PS_LONG
+	bool "Enable long output option (-l)"
+	default y
+	depends on PS && !DESKTOP
+	help
+	  Support argument 'l' for long output.
+	  Adds fields PPID, RSS, START, TIME & TTY
+
 config FEATURE_PS_TIME
 	bool "Enable time and elapsed time output"
 	default y

procps/ps.c

@@ -39,6 +39,12 @@
 //usage:	IF_FEATURE_PS_WIDE(
 //usage:     "\n	w	Wide output"
 //usage:	)
+//usage:	IF_FEATURE_PS_LONG(
+//usage:     "\n	l	Long output"
+//usage:	)
+//usage:	IF_FEATURE_SHOW_THREADS(
+//usage:     "\n	T	Show threads"
+//usage:	)
 //usage:
 //usage:#endif /* ENABLE_DESKTOP */
 //usage:
@@ -56,15 +62,15 @@
 //usage:       " 2990 andersen andersen R ps\n"
 
 #include "libbb.h"
+#ifdef __linux__
+# include <sys/sysinfo.h>
+#endif
 
 /* Absolute maximum on output line length */
 enum { MAX_WIDTH = 2*1024 };
 
 #if ENABLE_DESKTOP
 
-#ifdef __linux__
-# include <sys/sysinfo.h>
-#endif
 #include <sys/times.h> /* for times() */
 #ifndef AT_CLKTCK
 # define AT_CLKTCK 17
@@ -625,15 +631,21 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 	enum {
 		OPT_Z = (1 << 0) * ENABLE_SELINUX,
 		OPT_T = (1 << ENABLE_SELINUX) * ENABLE_FEATURE_SHOW_THREADS,
+		OPT_l = (1 << ENABLE_SELINUX) * (1 << ENABLE_FEATURE_SHOW_THREADS) * ENABLE_FEATURE_PS_LONG,
 	};
+#if ENABLE_FEATURE_PS_LONG
+	time_t now = now;
+	struct sysinfo info;
+#endif
 	int opts = 0;
 	/* If we support any options, parse argv */
-#if ENABLE_SELINUX || ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_PS_WIDE
+#if ENABLE_SELINUX || ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_PS_WIDE || ENABLE_FEATURE_PS_LONG
 # if ENABLE_FEATURE_PS_WIDE
 	/* -w is a bit complicated */
 	int w_count = 0;
 	opt_complementary = "-:ww";
-	opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T")"w", &w_count);
+	opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T")IF_FEATURE_PS_LONG("l")
+					"w", &w_count);
 	/* if w is given once, GNU ps sets the width to 132,
 	 * if w is given more than once, it is "unlimited"
 	 */
@@ -648,23 +660,47 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 # else
 	/* -w is not supported, only -Z and/or -T */
 	opt_complementary = "-";
-	opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T"));
+	opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T")IF_FEATURE_PS_LONG("l"));
 # endif
-#endif
 
-#if ENABLE_SELINUX
+# if ENABLE_SELINUX
 	if ((opts & OPT_Z) && is_selinux_enabled()) {
 		psscan_flags = PSSCAN_PID | PSSCAN_CONTEXT
 				| PSSCAN_STATE | PSSCAN_COMM;
 		puts("  PID CONTEXT                          STAT COMMAND");
 	} else
-#endif
+# endif
-	{
+	if (opts & OPT_l) {
+		psscan_flags = PSSCAN_STATE | PSSCAN_UIDGID | PSSCAN_PID | PSSCAN_PPID
+			| PSSCAN_TTY | PSSCAN_STIME | PSSCAN_UTIME | PSSCAN_COMM
+			| PSSCAN_VSZ | PSSCAN_RSS;
+/* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html
+ * mandates for -l:
+ * -F     Flags associated with the process (?)
+ * S      The state of the process
+ * UID,PID,PPID
+ * -C     Processor utilization for scheduling
+ * -PRI   The priority of the process; higher numbers mean lower priority
+ * -NI    Nice value; used in priority computation
+ * -ADDR  The address of the process
+ * SZ     The size in blocks of the core image of the process
+ * -WCHAN The event for which the process is waiting or sleeping
+ * TTY
+ * TIME   The cumulative execution time for the process
+ * CMD
+ * We don't show fileds marked with '-'. We show VSZ and RSS instead of SZ
+ */
+		puts("S   UID   PID  PPID   VSZ   RSS TTY   TIME     CMD");
+		now = time(NULL);
+		sysinfo(&info);
+	}
+	else {
 		puts("  PID USER       VSZ STAT COMMAND");
 	}
 	if (opts & OPT_T) {
 		psscan_flags |= PSSCAN_TASKS;
 	}
+#endif
 
 	p = NULL;
 	while ((p = procps_scan(p, psscan_flags)) != NULL) {
@@ -678,15 +714,46 @@ int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 		} else
 #endif
 		{
-			const char *user = get_cached_username(p->uid);
+			char buf6[6];
-			//if (p->vsz == 0)
+			smart_ulltoa5(p->vsz, buf6, " mgtpezy");
-			//	len = printf("%5u %-8.8s        %s ",
+			buf6[5] = '\0';
-			//		p->pid, user, p->state);
+#if ENABLE_FEATURE_PS_LONG
-			//else
+			if (opts & OPT_l) {
+				char bufr[6], strt[6];
+				char tty[2 * sizeof(int)*3 + 2];
+				char *endp;
+				unsigned sut = (p->stime + p->utime) / 100;
+				unsigned elapsed = info.uptime - (p->start_time / 100);
+				time_t start = now - elapsed;
+				struct tm *tm = localtime(&start);
+
+				smart_ulltoa5(p->rss, bufr, " mgtpezy");
+				bufr[5] = '\0';
+
+				if (p->tty_major == 136)
+					endp = stpcpy(tty, "pts/");
+				else
+				if (p->tty_major == 4) {
+					endp = stpcpy(tty, "tty");
+					if (p->tty_minor >= 64) {
+						p->tty_minor -= 64;
+						*endp++ = 'S';
+					}
+				}
+				else
+					endp = tty + sprintf(tty, "%d:", p->tty_major);
+				strcpy(endp, utoa(p->tty_minor));
+
+				strftime(strt, 6, (elapsed >= (24 * 60 * 60)) ? "%b%d" : "%H:%M", tm);
+				strt[5] = '\0';
+				//            S  UID PID PPID VSZ RSS TTY TIME           CMD
+				len = printf("%c %5u %5u %5u %5s %5s %-5s %02u:%02u:%02u ",
+					p->state[0], p->uid, p->pid, p->ppid, buf6, bufr, tty,
+					sut / 3600, (sut % 3600) / 60, sut % 60);
+			} else
+#endif
 			{
-				char buf6[6];
+				const char *user = get_cached_username(p->uid);
-				smart_ulltoa5(p->vsz, buf6, " mgtpezy");
-				buf6[5] = '\0';
 				len = printf("%5u %-8.8s %s %s  ",
 					p->pid, user, buf6, p->state);
 			}