[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit

Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/procps/top.c b/ap/app/busybox/src/procps/top.c
new file mode 100644
index 0000000..2908bd3
--- /dev/null
+++ b/ap/app/busybox/src/procps/top.c
@@ -0,0 +1,1291 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * A tiny 'top' utility.
+ *
+ * This is written specifically for the linux /proc/<PID>/stat(m)
+ * files format.
+ *
+ * This reads the PIDs of all processes and their status and shows
+ * the status of processes (first ones that fit to screen) at given
+ * intervals.
+ *
+ * NOTES:
+ * - At startup this changes to /proc, all the reads are then
+ *   relative to that.
+ *
+ * (C) Eero Tamminen <oak at welho dot com>
+ *
+ * Rewritten by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru>
+ *
+ * Sept 2008: Vineet Gupta <vineet.gupta@arc.com>
+ * Added Support for reporting SMP Information
+ * - CPU where process was last seen running
+ *   (to see effect of sched_setaffinity() etc)
+ * - CPU time split (idle/IO/wait etc) per CPU
+ *
+ * Copyright (c) 1992 Branko Lankester
+ * Copyright (c) 1992 Roger Binns
+ * Copyright (C) 1994-1996 Charles L. Blake.
+ * Copyright (C) 1992-1998 Michael K. Johnson
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+/* How to snapshot /proc for debugging top problems:
+ * for f in /proc/[0-9]*""/stat; do
+ *         n=${f#/proc/}
+ *         n=${n%/stat}_stat
+ *         cp $f $n
+ * done
+ * cp /proc/stat /proc/meminfo /proc/loadavg .
+ * top -bn1 >top.out
+ *
+ * ...and how to run top on it on another machine:
+ * rm -rf proc; mkdir proc
+ * for f in [0-9]*_stat; do
+ *         p=${f%_stat}
+ *         mkdir -p proc/$p
+ *         cp $f proc/$p/stat
+ * done
+ * cp stat meminfo loadavg proc
+ * chroot . ./top -bn1 >top1.out
+ */
+
+//config:config TOP
+//config:	bool "top"
+//config:	default y
+//config:	help
+//config:	  The top program provides a dynamic real-time view of a running
+//config:	  system.
+//config:
+//config:config FEATURE_TOP_CPU_USAGE_PERCENTAGE
+//config:	bool "Show CPU per-process usage percentage"
+//config:	default y
+//config:	depends on TOP
+//config:	help
+//config:	  Make top display CPU usage for each process.
+//config:	  This adds about 2k.
+//config:
+//config:config FEATURE_TOP_CPU_GLOBAL_PERCENTS
+//config:	bool "Show CPU global usage percentage"
+//config:	default y
+//config:	depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
+//config:	help
+//config:	  Makes top display "CPU: NN% usr NN% sys..." line.
+//config:	  This adds about 0.5k.
+//config:
+//config:config FEATURE_TOP_SMP_CPU
+//config:	bool "SMP CPU usage display ('c' key)"
+//config:	default y
+//config:	depends on FEATURE_TOP_CPU_GLOBAL_PERCENTS
+//config:	help
+//config:	  Allow 'c' key to switch between individual/cumulative CPU stats
+//config:	  This adds about 0.5k.
+//config:
+//config:config FEATURE_TOP_DECIMALS
+//config:	bool "Show 1/10th of a percent in CPU/mem statistics"
+//config:	default y
+//config:	depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
+//config:	help
+//config:	  Show 1/10th of a percent in CPU/mem statistics.
+//config:	  This adds about 0.3k.
+//config:
+//config:config FEATURE_TOP_SMP_PROCESS
+//config:	bool "Show CPU process runs on ('j' field)"
+//config:	default y
+//config:	depends on TOP
+//config:	help
+//config:	  Show CPU where process was last found running on.
+//config:	  This is the 'j' field.
+//config:
+//config:config FEATURE_TOPMEM
+//config:	bool "Topmem command ('s' key)"
+//config:	default y
+//config:	depends on TOP
+//config:	help
+//config:	  Enable 's' in top (gives lots of memory info).
+
+#include "libbb.h"
+
+
+typedef struct top_status_t {
+	unsigned long vsz;
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+	unsigned long ticks;
+	unsigned pcpu; /* delta of ticks */
+#endif
+	unsigned pid, ppid;
+	unsigned uid;
+	char state[4];
+	char comm[COMM_LEN];
+#if ENABLE_FEATURE_TOP_SMP_PROCESS
+	int last_seen_on_cpu;
+#endif
+} top_status_t;
+
+typedef struct jiffy_counts_t {
+	/* Linux 2.4.x has only first four */
+	unsigned long long usr, nic, sys, idle;
+	unsigned long long iowait, irq, softirq, steal;
+	unsigned long long total;
+	unsigned long long busy;
+} jiffy_counts_t;
+
+/* This structure stores some critical information from one frame to
+   the next. Used for finding deltas. */
+typedef struct save_hist {
+	unsigned long ticks;
+	pid_t pid;
+} save_hist;
+
+typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
+
+
+enum { SORT_DEPTH = 3 };
+
+
+struct globals {
+	top_status_t *top;
+	int ntop;
+	smallint inverted;
+#if ENABLE_FEATURE_TOPMEM
+	smallint sort_field;
+#endif
+#if ENABLE_FEATURE_TOP_SMP_CPU
+	smallint smp_cpu_info; /* one/many cpu info lines? */
+#endif
+	unsigned lines;  /* screen height */
+#if ENABLE_FEATURE_USE_TERMIOS
+	struct termios initial_settings;
+	int scroll_ofs;
+#define G_scroll_ofs G.scroll_ofs
+#else
+#define G_scroll_ofs 0
+#endif
+#if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+	cmp_funcp sort_function[1];
+#else
+	cmp_funcp sort_function[SORT_DEPTH];
+	struct save_hist *prev_hist;
+	int prev_hist_count;
+	jiffy_counts_t cur_jif, prev_jif;
+	/* int hist_iterations; */
+	unsigned total_pcpu;
+	/* unsigned long total_vsz; */
+#endif
+#if ENABLE_FEATURE_TOP_SMP_CPU
+	/* Per CPU samples: current and last */
+	jiffy_counts_t *cpu_jif, *cpu_prev_jif;
+	int num_cpus;
+#endif
+#if ENABLE_FEATURE_USE_TERMIOS
+	char kbd_input[KEYCODE_BUFFER_SIZE];
+#endif
+	char line_buf[80];
+}; //FIX_ALIASING; - large code growth
+enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
+#define G (*(struct globals*)&bb_common_bufsiz1)
+struct BUG_bad_size {
+	char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
+	char BUG_line_buf_too_small[LINE_BUF_SIZE > 80 ? 1 : -1];
+};
+#define top              (G.top               )
+#define ntop             (G.ntop              )
+#define sort_field       (G.sort_field        )
+#define inverted         (G.inverted          )
+#define smp_cpu_info     (G.smp_cpu_info      )
+#define initial_settings (G.initial_settings  )
+#define sort_function    (G.sort_function     )
+#define prev_hist        (G.prev_hist         )
+#define prev_hist_count  (G.prev_hist_count   )
+#define cur_jif          (G.cur_jif           )
+#define prev_jif         (G.prev_jif          )
+#define cpu_jif          (G.cpu_jif           )
+#define cpu_prev_jif     (G.cpu_prev_jif      )
+#define num_cpus         (G.num_cpus          )
+#define total_pcpu       (G.total_pcpu        )
+#define line_buf         (G.line_buf          )
+#define INIT_G() do { } while (0)
+
+enum {
+	OPT_d = (1 << 0),
+	OPT_n = (1 << 1),
+	OPT_b = (1 << 2),
+	OPT_m = (1 << 3),
+	OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
+};
+#define OPT_BATCH_MODE (option_mask32 & OPT_b)
+
+
+#if ENABLE_FEATURE_USE_TERMIOS
+static int pid_sort(top_status_t *P, top_status_t *Q)
+{
+	/* Buggy wrt pids with high bit set */
+	/* (linux pids are in [1..2^15-1]) */
+	return (Q->pid - P->pid);
+}
+#endif
+
+static int mem_sort(top_status_t *P, top_status_t *Q)
+{
+	/* We want to avoid unsigned->signed and truncation errors */
+	if (Q->vsz < P->vsz) return -1;
+	return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
+}
+
+
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+
+static int pcpu_sort(top_status_t *P, top_status_t *Q)
+{
+	/* Buggy wrt ticks with high bit set */
+	/* Affects only processes for which ticks overflow */
+	return (int)Q->pcpu - (int)P->pcpu;
+}
+
+static int time_sort(top_status_t *P, top_status_t *Q)
+{
+	/* We want to avoid unsigned->signed and truncation errors */
+	if (Q->ticks < P->ticks) return -1;
+	return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
+}
+
+static int mult_lvl_cmp(void* a, void* b)
+{
+	int i, cmp_val;
+
+	for (i = 0; i < SORT_DEPTH; i++) {
+		cmp_val = (*sort_function[i])(a, b);
+		if (cmp_val != 0)
+			break;
+	}
+	return inverted ? -cmp_val : cmp_val;
+}
+
+static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
+{
+#if !ENABLE_FEATURE_TOP_SMP_CPU
+	static const char fmt[] = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
+#else
+	static const char fmt[] = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
+#endif
+	int ret;
+
+	if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
+		return 0;
+	ret = sscanf(line_buf, fmt,
+			&p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
+			&p_jif->iowait, &p_jif->irq, &p_jif->softirq,
+			&p_jif->steal);
+	if (ret >= 4) {
+		p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
+			+ p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
+		/* procps 2.x does not count iowait as busy time */
+		p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
+	}
+
+	return ret;
+}
+
+static void get_jiffy_counts(void)
+{
+	FILE* fp = xfopen_for_read("stat");
+
+	/* We need to parse cumulative counts even if SMP CPU display is on,
+	 * they are used to calculate per process CPU% */
+	prev_jif = cur_jif;
+	if (read_cpu_jiffy(fp, &cur_jif) < 4)
+		bb_error_msg_and_die("can't read /proc/stat");
+
+#if !ENABLE_FEATURE_TOP_SMP_CPU
+	fclose(fp);
+	return;
+#else
+	if (!smp_cpu_info) {
+		fclose(fp);
+		return;
+	}
+
+	if (!num_cpus) {
+		/* First time here. How many CPUs?
+		 * There will be at least 1 /proc/stat line with cpu%d
+		 */
+		while (1) {
+			cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
+			if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
+				break;
+			num_cpus++;
+		}
+		if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
+			smp_cpu_info = 0;
+
+		cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
+
+		/* Otherwise the first per cpu display shows all 100% idles */
+		usleep(50000);
+	} else { /* Non first time invocation */
+		jiffy_counts_t *tmp;
+		int i;
+
+		/* First switch the sample pointers: no need to copy */
+		tmp = cpu_prev_jif;
+		cpu_prev_jif = cpu_jif;
+		cpu_jif = tmp;
+
+		/* Get the new samples */
+		for (i = 0; i < num_cpus; i++)
+			read_cpu_jiffy(fp, &cpu_jif[i]);
+	}
+#endif
+	fclose(fp);
+}
+
+static void do_stats(void)
+{
+	top_status_t *cur;
+	pid_t pid;
+	int i, last_i, n;
+	struct save_hist *new_hist;
+
+	get_jiffy_counts();
+	total_pcpu = 0;
+	/* total_vsz = 0; */
+	new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
+	/*
+	 * Make a pass through the data to get stats.
+	 */
+	/* hist_iterations = 0; */
+	i = 0;
+	for (n = 0; n < ntop; n++) {
+		cur = top + n;
+
+		/*
+		 * Calculate time in cur process.  Time is sum of user time
+		 * and system time
+		 */
+		pid = cur->pid;
+		new_hist[n].ticks = cur->ticks;
+		new_hist[n].pid = pid;
+
+		/* find matching entry from previous pass */
+		cur->pcpu = 0;
+		/* do not start at index 0, continue at last used one
+		 * (brought hist_iterations from ~14000 down to 172) */
+		last_i = i;
+		if (prev_hist_count) do {
+			if (prev_hist[i].pid == pid) {
+				cur->pcpu = cur->ticks - prev_hist[i].ticks;
+				total_pcpu += cur->pcpu;
+				break;
+			}
+			i = (i+1) % prev_hist_count;
+			/* hist_iterations++; */
+		} while (i != last_i);
+		/* total_vsz += cur->vsz; */
+	}
+
+	/*
+	 * Save cur frame's information.
+	 */
+	free(prev_hist);
+	prev_hist = new_hist;
+	prev_hist_count = ntop;
+}
+
+#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
+
+#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
+/* formats 7 char string (8 with terminating NUL) */
+static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
+{
+	unsigned t;
+	if (value >= total) { /* 100% ? */
+		strcpy(pbuf, "  100% ");
+		return pbuf;
+	}
+	/* else generate " [N/space]N.N% " string */
+	value = 1000 * value / total;
+	t = value / 100;
+	value = value % 100;
+	pbuf[0] = ' ';
+	pbuf[1] = t ? t + '0' : ' ';
+	pbuf[2] = '0' + (value / 10);
+	pbuf[3] = '.';
+	pbuf[4] = '0' + (value % 10);
+	pbuf[5] = '%';
+	pbuf[6] = ' ';
+	pbuf[7] = '\0';
+	return pbuf;
+}
+#endif
+
+#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
+static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
+{
+	/*
+	 * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
+	 */
+	unsigned total_diff;
+	jiffy_counts_t *p_jif, *p_prev_jif;
+	int i;
+# if ENABLE_FEATURE_TOP_SMP_CPU
+	int n_cpu_lines;
+# endif
+
+	/* using (unsigned) casts to make operations cheaper */
+# define  CALC_TOTAL_DIFF do { \
+	total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
+	if (total_diff == 0) total_diff = 1; \
+} while (0)
+
+# if ENABLE_FEATURE_TOP_DECIMALS
+#  define CALC_STAT(xxx) char xxx[8]
+#  define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
+#  define FMT "%s"
+# else
+#  define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
+#  define SHOW_STAT(xxx) xxx
+#  define FMT "%4u%% "
+# endif
+
+# if !ENABLE_FEATURE_TOP_SMP_CPU
+	{
+		i = 1;
+		p_jif = &cur_jif;
+		p_prev_jif = &prev_jif;
+# else
+	/* Loop thru CPU(s) */
+	n_cpu_lines = smp_cpu_info ? num_cpus : 1;
+	if (n_cpu_lines > *lines_rem_p)
+		n_cpu_lines = *lines_rem_p;
+
+	for (i = 0; i < n_cpu_lines; i++) {
+		p_jif = &cpu_jif[i];
+		p_prev_jif = &cpu_prev_jif[i];
+# endif
+		CALC_TOTAL_DIFF;
+
+		{ /* Need a block: CALC_STAT are declarations */
+			CALC_STAT(usr);
+			CALC_STAT(sys);
+			CALC_STAT(nic);
+			CALC_STAT(idle);
+			CALC_STAT(iowait);
+			CALC_STAT(irq);
+			CALC_STAT(softirq);
+			/*CALC_STAT(steal);*/
+
+			snprintf(scrbuf, scr_width,
+				/* Barely fits in 79 chars when in "decimals" mode. */
+# if ENABLE_FEATURE_TOP_SMP_CPU
+				"CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
+				(smp_cpu_info ? utoa(i) : ""),
+# else
+				"CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
+# endif
+				SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
+				SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
+				/*, SHOW_STAT(steal) - what is this 'steal' thing? */
+				/* I doubt anyone wants to know it */
+			);
+			puts(scrbuf);
+		}
+	}
+# undef SHOW_STAT
+# undef CALC_STAT
+# undef FMT
+	*lines_rem_p -= i;
+}
+#else  /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
+# define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
+#endif
+
+static unsigned long display_header(int scr_width, int *lines_rem_p)
+{
+	FILE *fp;
+	char buf[80];
+	char scrbuf[80];
+	unsigned long total, used, mfree, shared, buffers, cached;
+
+	/* read memory info */
+	fp = xfopen_for_read("meminfo");
+
+	/*
+	 * Old kernels (such as 2.4.x) had a nice summary of memory info that
+	 * we could parse, however this is gone entirely in 2.6. Try parsing
+	 * the old way first, and if that fails, parse each field manually.
+	 *
+	 * First, we read in the first line. Old kernels will have bogus
+	 * strings we don't care about, whereas new kernels will start right
+	 * out with MemTotal:
+	 *                              -- PFM.
+	 */
+	if (fscanf(fp, "MemTotal: %lu %s\n", &total, buf) != 2) {
+		fgets(buf, sizeof(buf), fp);    /* skip first line */
+
+		fscanf(fp, "Mem: %lu %lu %lu %lu %lu %lu",
+			&total, &used, &mfree, &shared, &buffers, &cached);
+		/* convert to kilobytes */
+		used /= 1024;
+		mfree /= 1024;
+		shared /= 1024;
+		buffers /= 1024;
+		cached /= 1024;
+		total /= 1024;
+	} else {
+		/*
+		 * Revert to manual parsing, which incidentally already has the
+		 * sizes in kilobytes. This should be safe for both 2.4 and
+		 * 2.6.
+		 */
+		fscanf(fp, "MemFree: %lu %s\n", &mfree, buf);
+
+		/*
+		 * MemShared: is no longer present in 2.6. Report this as 0,
+		 * to maintain consistent behavior with normal procps.
+		 */
+		if (fscanf(fp, "MemShared: %lu %s\n", &shared, buf) != 2)
+			shared = 0;
+
+		fscanf(fp, "Buffers: %lu %s\n", &buffers, buf);
+		fscanf(fp, "Cached: %lu %s\n", &cached, buf);
+
+		used = total - mfree;
+	}
+	fclose(fp);
+
+	/* output memory info */
+	if (scr_width > (int)sizeof(scrbuf))
+		scr_width = sizeof(scrbuf);
+	snprintf(scrbuf, scr_width,
+		"Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
+		used, mfree, shared, buffers, cached);
+	/* go to top & clear to the end of screen */
+	printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
+	(*lines_rem_p)--;
+
+	/* Display CPU time split as percentage of total time
+	 * This displays either a cumulative line or one line per CPU
+	 */
+	display_cpus(scr_width, scrbuf, lines_rem_p);
+
+	/* read load average as a string */
+	buf[0] = '\0';
+	open_read_close("loadavg", buf, sizeof(buf) - 1);
+	buf[sizeof(buf) - 1] = '\n';
+	*strchr(buf, '\n') = '\0';
+	snprintf(scrbuf, scr_width, "Load average: %s", buf);
+	puts(scrbuf);
+	(*lines_rem_p)--;
+
+	return total;
+}
+
+static NOINLINE void display_process_list(int lines_rem, int scr_width)
+{
+	enum {
+		BITS_PER_INT = sizeof(int) * 8
+	};
+
+	top_status_t *s;
+	char vsz_str_buf[8];
+	unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
+	/* xxx_shift and xxx_scale variables allow us to replace
+	 * expensive divides with multiply and shift */
+	unsigned pmem_shift, pmem_scale, pmem_half;
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+	unsigned tmp_unsigned;
+	unsigned pcpu_shift, pcpu_scale, pcpu_half;
+	unsigned busy_jifs;
+#endif
+
+	/* what info of the processes is shown */
+	printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
+		"  PID  PPID USER     STAT   VSZ %VSZ"
+		IF_FEATURE_TOP_SMP_PROCESS(" CPU")
+		IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
+		" COMMAND");
+	lines_rem--;
+
+#if ENABLE_FEATURE_TOP_DECIMALS
+# define UPSCALE 1000
+# define CALC_STAT(name, val) div_t name = div((val), 10)
+# define SHOW_STAT(name) name.quot, '0'+name.rem
+# define FMT "%3u.%c"
+#else
+# define UPSCALE 100
+# define CALC_STAT(name, val) unsigned name = (val)
+# define SHOW_STAT(name) name
+# define FMT "%4u%%"
+#endif
+	/*
+	 * %VSZ = s->vsz/MemTotal
+	 */
+	pmem_shift = BITS_PER_INT-11;
+	pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
+	/* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
+	while (pmem_scale >= 512) {
+		pmem_scale /= 4;
+		pmem_shift -= 2;
+	}
+	pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+	busy_jifs = cur_jif.busy - prev_jif.busy;
+	/* This happens if there were lots of short-lived processes
+	 * between two top updates (e.g. compilation) */
+	if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
+
+	/*
+	 * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
+	 * (pcpu is delta of sys+user time between samples)
+	 */
+	/* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
+	 * in 0..~64000 range (HZ*update_interval).
+	 * we assume that unsigned is at least 32-bit.
+	 */
+	pcpu_shift = 6;
+	pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs;
+	if (pcpu_scale == 0)
+		pcpu_scale = 1;
+	while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
+		pcpu_scale *= 4;
+		pcpu_shift += 2;
+	}
+	tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
+	if (tmp_unsigned != 0)
+		pcpu_scale /= tmp_unsigned;
+	/* we want (s->pcpu * pcpu_scale) to never overflow */
+	while (pcpu_scale >= 1024) {
+		pcpu_scale /= 4;
+		pcpu_shift -= 2;
+	}
+	pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
+	/* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
+#endif
+
+	/* Ok, all preliminary data is ready, go through the list */
+	scr_width += 2; /* account for leading '\n' and trailing NUL */
+	if (lines_rem > ntop - G_scroll_ofs)
+		lines_rem = ntop - G_scroll_ofs;
+	s = top + G_scroll_ofs;
+	while (--lines_rem >= 0) {
+		unsigned col;
+		CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+		CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
+#endif
+
+		if (s->vsz >= 100000)
+			sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
+		else
+			sprintf(vsz_str_buf, "%7ld", s->vsz);
+		/* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */
+		col = snprintf(line_buf, scr_width,
+				"\n" "%5u%6u %-8.8s %s%s" FMT
+				IF_FEATURE_TOP_SMP_PROCESS(" %3d")
+				IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT)
+				" ",
+				s->pid, s->ppid, get_cached_username(s->uid),
+				s->state, vsz_str_buf,
+				SHOW_STAT(pmem)
+				IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
+				IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
+		);
+		if ((int)(col + 1) < scr_width)
+			read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm);
+		fputs(line_buf, stdout);
+		/* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
+			cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
+		s++;
+	}
+	/* printf(" %d", hist_iterations); */
+	bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
+	fflush_all();
+}
+#undef UPSCALE
+#undef SHOW_STAT
+#undef CALC_STAT
+#undef FMT
+
+static void clearmems(void)
+{
+	clear_username_cache();
+	free(top);
+	top = NULL;
+}
+
+#if ENABLE_FEATURE_USE_TERMIOS
+
+static void reset_term(void)
+{
+	if (!OPT_BATCH_MODE)
+		tcsetattr_stdin_TCSANOW(&initial_settings);
+	if (ENABLE_FEATURE_CLEAN_UP) {
+		clearmems();
+# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+		free(prev_hist);
+# endif
+	}
+}
+
+static void sig_catcher(int sig)
+{
+	reset_term();
+	kill_myself_with_sig(sig);
+}
+
+#endif /* FEATURE_USE_TERMIOS */
+
+/*
+ * TOPMEM support
+ */
+
+typedef unsigned long mem_t;
+
+typedef struct topmem_status_t {
+	unsigned pid;
+	char comm[COMM_LEN];
+	/* vsz doesn't count /dev/xxx mappings except /dev/zero */
+	mem_t vsz     ;
+	mem_t vszrw   ;
+	mem_t rss     ;
+	mem_t rss_sh  ;
+	mem_t dirty   ;
+	mem_t dirty_sh;
+	mem_t stack   ;
+} topmem_status_t;
+
+enum { NUM_SORT_FIELD = 7 };
+
+#define topmem ((topmem_status_t*)top)
+
+#if ENABLE_FEATURE_TOPMEM
+
+static int topmem_sort(char *a, char *b)
+{
+	int n;
+	mem_t l, r;
+
+	n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
+	l = *(mem_t*)(a + n);
+	r = *(mem_t*)(b + n);
+	if (l == r) {
+		l = ((topmem_status_t*)a)->dirty;
+		r = ((topmem_status_t*)b)->dirty;
+	}
+	/* We want to avoid unsigned->signed and truncation errors */
+	/* l>r: -1, l=r: 0, l<r: 1 */
+	n = (l > r) ? -1 : (l != r);
+	return inverted ? -n : n;
+}
+
+/* display header info (meminfo / loadavg) */
+static void display_topmem_header(int scr_width, int *lines_rem_p)
+{
+	enum {
+		TOTAL = 0, MFREE, BUF, CACHE,
+		SWAPTOTAL, SWAPFREE, DIRTY,
+		MWRITE, ANON, MAP, SLAB,
+		NUM_FIELDS
+	};
+	static const char match[NUM_FIELDS][12] = {
+		"\x09" "MemTotal:",  // TOTAL
+		"\x08" "MemFree:",   // MFREE
+		"\x08" "Buffers:",   // BUF
+		"\x07" "Cached:",    // CACHE
+		"\x0a" "SwapTotal:", // SWAPTOTAL
+		"\x09" "SwapFree:",  // SWAPFREE
+		"\x06" "Dirty:",     // DIRTY
+		"\x0a" "Writeback:", // MWRITE
+		"\x0a" "AnonPages:", // ANON
+		"\x07" "Mapped:",    // MAP
+		"\x05" "Slab:",      // SLAB
+	};
+	char meminfo_buf[4 * 1024];
+	const char *Z[NUM_FIELDS];
+	unsigned i;
+	int sz;
+
+	for (i = 0; i < NUM_FIELDS; i++)
+		Z[i] = "?";
+
+	/* read memory info */
+	sz = open_read_close("meminfo", meminfo_buf, sizeof(meminfo_buf) - 1);
+	if (sz >= 0) {
+		char *p = meminfo_buf;
+		meminfo_buf[sz] = '\0';
+		/* Note that fields always appear in the match[] order */
+		for (i = 0; i < NUM_FIELDS; i++) {
+			char *found = strstr(p, match[i] + 1);
+			if (found) {
+				/* Cut "NNNN" out of "    NNNN kb" */
+				char *s = skip_whitespace(found + match[i][0]);
+				p = skip_non_whitespace(s);
+				*p++ = '\0';
+				Z[i] = s;
+			}
+		}
+	}
+
+	snprintf(line_buf, LINE_BUF_SIZE,
+		"Mem total:%s anon:%s map:%s free:%s",
+		Z[TOTAL], Z[ANON], Z[MAP], Z[MFREE]);
+	printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf);
+
+	snprintf(line_buf, LINE_BUF_SIZE,
+		" slab:%s buf:%s cache:%s dirty:%s write:%s",
+		Z[SLAB], Z[BUF], Z[CACHE], Z[DIRTY], Z[MWRITE]);
+	printf("%.*s\n", scr_width, line_buf);
+
+	snprintf(line_buf, LINE_BUF_SIZE,
+		"Swap total:%s free:%s", // TODO: % used?
+		Z[SWAPTOTAL], Z[SWAPFREE]);
+	printf("%.*s\n", scr_width, line_buf);
+
+	(*lines_rem_p) -= 3;
+}
+
+static void ulltoa6_and_space(unsigned long long ul, char buf[6])
+{
+	/* see http://en.wikipedia.org/wiki/Tera */
+	smart_ulltoa5(ul, buf, " mgtpezy");
+	buf[5] = ' ';
+}
+
+static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
+{
+#define HDR_STR "  PID   VSZ VSZRW   RSS (SHR) DIRTY (SHR) STACK"
+#define MIN_WIDTH sizeof(HDR_STR)
+	const topmem_status_t *s = topmem + G_scroll_ofs;
+
+	display_topmem_header(scr_width, &lines_rem);
+	strcpy(line_buf, HDR_STR " COMMAND");
+	line_buf[11 + sort_field * 6] = "^_"[inverted];
+	printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
+	lines_rem--;
+
+	if (lines_rem > ntop - G_scroll_ofs)
+		lines_rem = ntop - G_scroll_ofs;
+	while (--lines_rem >= 0) {
+		/* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
+		ulltoa6_and_space(s->pid     , &line_buf[0*6]);
+		ulltoa6_and_space(s->vsz     , &line_buf[1*6]);
+		ulltoa6_and_space(s->vszrw   , &line_buf[2*6]);
+		ulltoa6_and_space(s->rss     , &line_buf[3*6]);
+		ulltoa6_and_space(s->rss_sh  , &line_buf[4*6]);
+		ulltoa6_and_space(s->dirty   , &line_buf[5*6]);
+		ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
+		ulltoa6_and_space(s->stack   , &line_buf[7*6]);
+		line_buf[8*6] = '\0';
+		if (scr_width > (int)MIN_WIDTH) {
+			read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
+		}
+		printf("\n""%.*s", scr_width, line_buf);
+		s++;
+	}
+	bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
+	fflush_all();
+#undef HDR_STR
+#undef MIN_WIDTH
+}
+
+#else
+void display_topmem_process_list(int lines_rem, int scr_width);
+int topmem_sort(char *a, char *b);
+#endif /* TOPMEM */
+
+/*
+ * end TOPMEM support
+ */
+
+enum {
+	TOP_MASK = 0
+		| PSSCAN_PID
+		| PSSCAN_PPID
+		| PSSCAN_VSZ
+		| PSSCAN_STIME
+		| PSSCAN_UTIME
+		| PSSCAN_STATE
+		| PSSCAN_COMM
+		| PSSCAN_CPU
+		| PSSCAN_UIDGID,
+	TOPMEM_MASK = 0
+		| PSSCAN_PID
+		| PSSCAN_SMAPS
+		| PSSCAN_COMM,
+	EXIT_MASK = (unsigned)-1,
+};
+
+#if ENABLE_FEATURE_USE_TERMIOS
+static unsigned handle_input(unsigned scan_mask, unsigned interval)
+{
+	struct pollfd pfd[1];
+
+	if (option_mask32 & OPT_EOF) {
+		/* EOF on stdin ("top </dev/null") */
+		sleep(interval);
+		return scan_mask;
+	}
+
+	pfd[0].fd = 0;
+	pfd[0].events = POLLIN;
+
+	while (1) {
+		int32_t c;
+
+		c = read_key(STDIN_FILENO, G.kbd_input, interval * 1000);
+		if (c == -1 && errno != EAGAIN) {
+			/* error/EOF */
+			option_mask32 |= OPT_EOF;
+			break;
+		}
+		interval = 0;
+
+		if (c == initial_settings.c_cc[VINTR])
+			return EXIT_MASK;
+		if (c == initial_settings.c_cc[VEOF])
+			return EXIT_MASK;
+
+		if (c == KEYCODE_UP) {
+			G_scroll_ofs--;
+			goto normalize_ofs;
+		}
+		if (c == KEYCODE_DOWN) {
+			G_scroll_ofs++;
+			goto normalize_ofs;
+		}
+		if (c == KEYCODE_HOME) {
+			G_scroll_ofs = 0;
+			break;
+		}
+		if (c == KEYCODE_END) {
+			G_scroll_ofs = ntop - G.lines / 2;
+			goto normalize_ofs;
+		}
+		if (c == KEYCODE_PAGEUP) {
+			G_scroll_ofs -= G.lines / 2;
+			goto normalize_ofs;
+		}
+		if (c == KEYCODE_PAGEDOWN) {
+			G_scroll_ofs += G.lines / 2;
+ normalize_ofs:
+			if (G_scroll_ofs >= ntop)
+				G_scroll_ofs = ntop - 1;
+			if (G_scroll_ofs < 0)
+				G_scroll_ofs = 0;
+			break;
+		}
+
+		c |= 0x20; /* lowercase */
+		if (c == 'q')
+			return EXIT_MASK;
+
+		if (c == 'n') {
+			IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
+			sort_function[0] = pid_sort;
+			continue;
+		}
+		if (c == 'm') {
+			IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
+			sort_function[0] = mem_sort;
+# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+			sort_function[1] = pcpu_sort;
+			sort_function[2] = time_sort;
+# endif
+			continue;
+		}
+# if ENABLE_FEATURE_SHOW_THREADS
+		if (c == 'h'
+		IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
+		) {
+			scan_mask ^= PSSCAN_TASKS;
+			continue;
+		}
+# endif
+# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+		if (c == 'p') {
+			IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
+			sort_function[0] = pcpu_sort;
+			sort_function[1] = mem_sort;
+			sort_function[2] = time_sort;
+			continue;
+		}
+		if (c == 't') {
+			IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
+			sort_function[0] = time_sort;
+			sort_function[1] = mem_sort;
+			sort_function[2] = pcpu_sort;
+			continue;
+		}
+#  if ENABLE_FEATURE_TOPMEM
+		if (c == 's') {
+			scan_mask = TOPMEM_MASK;
+			free(prev_hist);
+			prev_hist = NULL;
+			prev_hist_count = 0;
+			sort_field = (sort_field + 1) % NUM_SORT_FIELD;
+			continue;
+		}
+#  endif
+		if (c == 'r') {
+			inverted ^= 1;
+			continue;
+		}
+#  if ENABLE_FEATURE_TOP_SMP_CPU
+		/* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
+		if (c == 'c' || c == '1') {
+			/* User wants to toggle per cpu <> aggregate */
+			if (smp_cpu_info) {
+				free(cpu_prev_jif);
+				free(cpu_jif);
+				cpu_jif = &cur_jif;
+				cpu_prev_jif = &prev_jif;
+			} else {
+				/* Prepare for xrealloc() */
+				cpu_jif = cpu_prev_jif = NULL;
+			}
+			num_cpus = 0;
+			smp_cpu_info = !smp_cpu_info;
+			get_jiffy_counts();
+			continue;
+		}
+#  endif
+# endif
+		break; /* unknown key -> force refresh */
+	}
+
+	return scan_mask;
+}
+#endif
+
+//usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU
+//usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__
+//usage:#else
+//usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...)
+//usage:#endif
+//usage:#define top_trivial_usage
+//usage:       "[-b] [-nCOUNT] [-dSECONDS]" IF_FEATURE_TOPMEM(" [-m]")
+//usage:#define top_full_usage "\n\n"
+//usage:       "Provide a view of process activity in real time."
+//usage:   "\n""Read the status of all processes from /proc each SECONDS"
+//usage:   "\n""and display a screenful of them."
+//usage:   "\n""Keys:"
+//usage:   "\n""	N/M"
+//usage:                IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/P")
+//usage:                IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/T")
+//usage:           ": " IF_FEATURE_TOPMEM("show CPU usage, ") "sort by pid/mem"
+//usage:                IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu")
+//usage:                IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time")
+//usage:	IF_FEATURE_TOPMEM(
+//usage:   "\n""	S: show memory"
+//usage:	)
+//usage:   "\n""	R: reverse sort"
+//usage:	IF_SHOW_THREADS_OR_TOP_SMP(
+//usage:   "\n""	"
+//usage:                IF_FEATURE_SHOW_THREADS("H: toggle threads")
+//usage:                IF_FEATURE_SHOW_THREADS(IF_FEATURE_TOP_SMP_CPU(", "))
+//usage:                IF_FEATURE_TOP_SMP_CPU("1: toggle SMP")
+//usage:	)
+//usage:   "\n""	Q,^C: exit"
+//usage:   "\n"
+//usage:   "\n""Options:"
+//usage:   "\n""	-b	Batch mode"
+//usage:   "\n""	-n N	Exit after N iterations"
+//usage:   "\n""	-d N	Delay between updates"
+//usage:	IF_FEATURE_TOPMEM(
+//usage:   "\n""	-m	Same as 's' key"
+//usage:	)
+
+/* Interactive testing:
+ * echo sss | ./busybox top
+ * - shows memory screen
+ * echo sss | ./busybox top -bn1 >mem
+ * - saves memory screen - the *whole* list, not first NROWS processes!
+ * echo .m.s.s.s.s.s.s.q | ./busybox top -b >z
+ * - saves several different screens, and exits
+ *
+ * TODO: -i STRING param as a better alternative?
+ */
+
+int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int top_main(int argc UNUSED_PARAM, char **argv)
+{
+	int iterations;
+	unsigned col;
+	unsigned interval;
+	char *str_interval, *str_iterations;
+	unsigned scan_mask = TOP_MASK;
+#if ENABLE_FEATURE_USE_TERMIOS
+	struct termios new_settings;
+#endif
+
+	INIT_G();
+
+	interval = 5; /* default update interval is 5 seconds */
+	iterations = 0; /* infinite */
+#if ENABLE_FEATURE_TOP_SMP_CPU
+	/*num_cpus = 0;*/
+	/*smp_cpu_info = 0;*/  /* to start with show aggregate */
+	cpu_jif = &cur_jif;
+	cpu_prev_jif = &prev_jif;
+#endif
+
+	/* all args are options; -n NUM */
+	opt_complementary = "-"; /* options can be specified w/o dash */
+	col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations);
+#if ENABLE_FEATURE_TOPMEM
+	if (col & OPT_m) /* -m (busybox specific) */
+		scan_mask = TOPMEM_MASK;
+#endif
+	if (col & OPT_d) {
+		/* work around for "-d 1" -> "-d -1" done by getopt32
+		 * (opt_complementary == "-" does this) */
+		if (str_interval[0] == '-')
+			str_interval++;
+		/* Need to limit it to not overflow poll timeout */
+		interval = xatou16(str_interval);
+	}
+	if (col & OPT_n) {
+		if (str_iterations[0] == '-')
+			str_iterations++;
+		iterations = xatou(str_iterations);
+	}
+
+	/* change to /proc */
+	xchdir("/proc");
+
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+	sort_function[0] = pcpu_sort;
+	sort_function[1] = mem_sort;
+	sort_function[2] = time_sort;
+#else
+	sort_function[0] = mem_sort;
+#endif
+
+	if (OPT_BATCH_MODE) {
+		option_mask32 |= OPT_EOF;
+	}
+#if ENABLE_FEATURE_USE_TERMIOS
+	else {
+		tcgetattr(0, (void *) &initial_settings);
+		memcpy(&new_settings, &initial_settings, sizeof(new_settings));
+		/* unbuffered input, turn off echo */
+		new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
+		tcsetattr_stdin_TCSANOW(&new_settings);
+	}
+
+	bb_signals(BB_FATAL_SIGS, sig_catcher);
+
+	/* Eat initial input, if any */
+	scan_mask = handle_input(scan_mask, 0);
+#endif
+
+	while (scan_mask != EXIT_MASK) {
+		procps_status_t *p = NULL;
+
+		if (OPT_BATCH_MODE) {
+			G.lines = INT_MAX;
+			col = LINE_BUF_SIZE - 2; /* +2 bytes for '\n', NUL */
+		} else {
+			G.lines = 24; /* default */
+			col = 79;
+#if ENABLE_FEATURE_USE_TERMIOS
+			/* We output to stdout, we need size of stdout (not stdin)! */
+			get_terminal_width_height(STDOUT_FILENO, &col, &G.lines);
+			if (G.lines < 5 || col < 10) {
+				sleep(interval);
+				continue;
+			}
+#endif
+			if (col > LINE_BUF_SIZE - 2)
+				col = LINE_BUF_SIZE - 2;
+		}
+
+		/* read process IDs & status for all the processes */
+		ntop = 0;
+		while ((p = procps_scan(p, scan_mask)) != NULL) {
+			int n;
+#if ENABLE_FEATURE_TOPMEM
+			if (scan_mask != TOPMEM_MASK)
+#endif
+			{
+				n = ntop;
+				top = xrealloc_vector(top, 6, ntop++);
+				top[n].pid = p->pid;
+				top[n].ppid = p->ppid;
+				top[n].vsz = p->vsz;
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+				top[n].ticks = p->stime + p->utime;
+#endif
+				top[n].uid = p->uid;
+				strcpy(top[n].state, p->state);
+				strcpy(top[n].comm, p->comm);
+#if ENABLE_FEATURE_TOP_SMP_PROCESS
+				top[n].last_seen_on_cpu = p->last_seen_on_cpu;
+#endif
+			}
+#if ENABLE_FEATURE_TOPMEM
+			else { /* TOPMEM */
+				if (!(p->smaps.mapped_ro | p->smaps.mapped_rw))
+					continue; /* kernel threads are ignored */
+				n = ntop;
+				/* No bug here - top and topmem are the same */
+				top = xrealloc_vector(topmem, 6, ntop++);
+				strcpy(topmem[n].comm, p->comm);
+				topmem[n].pid      = p->pid;
+				topmem[n].vsz      = p->smaps.mapped_rw + p->smaps.mapped_ro;
+				topmem[n].vszrw    = p->smaps.mapped_rw;
+				topmem[n].rss_sh   = p->smaps.shared_clean + p->smaps.shared_dirty;
+				topmem[n].rss      = p->smaps.private_clean + p->smaps.private_dirty + topmem[n].rss_sh;
+				topmem[n].dirty    = p->smaps.private_dirty + p->smaps.shared_dirty;
+				topmem[n].dirty_sh = p->smaps.shared_dirty;
+				topmem[n].stack    = p->smaps.stack;
+			}
+#endif
+		} /* end of "while we read /proc" */
+		if (ntop == 0) {
+			bb_error_msg("no process info in /proc");
+			break;
+		}
+
+		if (scan_mask != TOPMEM_MASK) {
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+			if (!prev_hist_count) {
+				do_stats();
+				usleep(100000);
+				clearmems();
+				continue;
+			}
+			do_stats();
+			/* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
+			qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
+#else
+			qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
+#endif
+		}
+#if ENABLE_FEATURE_TOPMEM
+		else { /* TOPMEM */
+			qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
+		}
+#endif
+		if (scan_mask != TOPMEM_MASK)
+			display_process_list(G.lines, col);
+#if ENABLE_FEATURE_TOPMEM
+		else
+			display_topmem_process_list(G.lines, col);
+#endif
+		clearmems();
+		if (iterations >= 0 && !--iterations)
+			break;
+#if !ENABLE_FEATURE_USE_TERMIOS
+		sleep(interval);
+#else
+		scan_mask = handle_input(scan_mask, interval);
+#endif /* FEATURE_USE_TERMIOS */
+	} /* end of "while (not Q)" */
+
+	bb_putchar('\n');
+#if ENABLE_FEATURE_USE_TERMIOS
+	reset_term();
+#endif
+	return EXIT_SUCCESS;
+}