blob: 4f37878de356c7d6bac866d4d09dea55197a9390 [file] [log] [blame]
Bernhard Reutner-Fischerd9cf7ac2006-04-12 18:39:58 +00001/* vi: set sw=4 ts=4: */
Eric Andersen420b2082002-09-17 22:14:58 +00002/*
3 * A tiny 'top' utility.
4 *
Eric Andersen08a72202002-09-30 20:52:10 +00005 * This is written specifically for the linux /proc/<PID>/stat(m)
6 * files format.
Denis Vlasenkodb12d1d2008-12-07 00:52:58 +00007 *
Eric Andersen08a72202002-09-30 20:52:10 +00008 * This reads the PIDs of all processes and their status and shows
9 * the status of processes (first ones that fit to screen) at given
10 * intervals.
Eric Andersenc7bda1c2004-03-15 08:29:22 +000011 *
Eric Andersen420b2082002-09-17 22:14:58 +000012 * NOTES:
13 * - At startup this changes to /proc, all the reads are then
14 * relative to that.
Eric Andersenc7bda1c2004-03-15 08:29:22 +000015 *
Eric Andersen420b2082002-09-17 22:14:58 +000016 * (C) Eero Tamminen <oak at welho dot com>
Eric Andersen08a72202002-09-30 20:52:10 +000017 *
Eric Andersenaff114c2004-04-14 17:51:38 +000018 * Rewritten by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru>
Denis Vlasenko17e7f042008-09-25 10:48:06 +000019 *
20 * Sept 2008: Vineet Gupta <vineet.gupta@arc.com>
21 * Added Support for reporting SMP Information
22 * - CPU where Process was last seen running
23 * (to see effect of sched_setaffinity() etc)
24 * - CPU Time Split (idle/IO/wait etc) PER CPU
Denis Vlasenkodb12d1d2008-12-07 00:52:58 +000025 *
Eric Andersen08a72202002-09-30 20:52:10 +000026 * Copyright (c) 1992 Branko Lankester
27 * Copyright (c) 1992 Roger Binns
28 * Copyright (C) 1994-1996 Charles L. Blake.
29 * Copyright (C) 1992-1998 Michael K. Johnson
Denis Vlasenkodb12d1d2008-12-07 00:52:58 +000030 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +020031 * Licensed under GPLv2, see file LICENSE in this source tree.
Eric Andersen08a72202002-09-30 20:52:10 +000032 */
33
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000034#include "libbb.h"
Eric Andersen420b2082002-09-17 22:14:58 +000035
Eric Andersen08a72202002-09-30 20:52:10 +000036
Denis Vlasenko85818632007-04-19 14:47:11 +000037typedef struct top_status_t {
Mike Frysinger0aa6ba52007-02-08 08:21:58 +000038 unsigned long vsz;
Denis Vlasenko459e4d62006-11-05 00:43:51 +000039#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
40 unsigned long ticks;
41 unsigned pcpu; /* delta of ticks */
42#endif
43 unsigned pid, ppid;
44 unsigned uid;
45 char state[4];
Denis Vlasenko98ebab82007-06-30 14:47:41 +000046 char comm[COMM_LEN];
Denis Vlasenko17e7f042008-09-25 10:48:06 +000047#if ENABLE_FEATURE_TOP_SMP_PROCESS
48 int last_seen_on_cpu;
49#endif
Denis Vlasenko459e4d62006-11-05 00:43:51 +000050} top_status_t;
Denis Vlasenko85818632007-04-19 14:47:11 +000051
Denis Vlasenko98ebab82007-06-30 14:47:41 +000052typedef struct jiffy_counts_t {
Denis Vlasenko78862752009-03-03 11:55:31 +000053 /* Linux 2.4.x has only first four */
54 unsigned long long usr, nic, sys, idle;
55 unsigned long long iowait, irq, softirq, steal;
Denis Vlasenko85818632007-04-19 14:47:11 +000056 unsigned long long total;
57 unsigned long long busy;
58} jiffy_counts_t;
59
Denis Vlasenko459e4d62006-11-05 00:43:51 +000060/* This structure stores some critical information from one frame to
61 the next. Used for finding deltas. */
Denis Vlasenko85818632007-04-19 14:47:11 +000062typedef struct save_hist {
Denis Vlasenko459e4d62006-11-05 00:43:51 +000063 unsigned long ticks;
Denis Vlasenko6b06cb82008-05-15 21:30:45 +000064 pid_t pid;
Denis Vlasenko85818632007-04-19 14:47:11 +000065} save_hist;
66
67typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
68
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +000069
Denis Vlasenko85818632007-04-19 14:47:11 +000070enum { SORT_DEPTH = 3 };
71
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +000072
Denis Vlasenko85818632007-04-19 14:47:11 +000073struct globals {
74 top_status_t *top;
75 int ntop;
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +000076#if ENABLE_FEATURE_TOPMEM
77 smallint sort_field;
78 smallint inverted;
79#endif
Denis Vlasenko17e7f042008-09-25 10:48:06 +000080#if ENABLE_FEATURE_TOP_SMP_CPU
81 smallint smp_cpu_info; /* one/many cpu info lines? */
82#endif
Denis Vlasenko85818632007-04-19 14:47:11 +000083#if ENABLE_FEATURE_USE_TERMIOS
84 struct termios initial_settings;
85#endif
86#if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Denis Vlasenko8bdba4d2007-08-29 18:18:08 +000087 cmp_funcp sort_function[1];
Denis Vlasenko85818632007-04-19 14:47:11 +000088#else
89 cmp_funcp sort_function[SORT_DEPTH];
90 struct save_hist *prev_hist;
91 int prev_hist_count;
Denis Vlasenko35840ab2008-09-25 11:11:37 +000092 jiffy_counts_t cur_jif, prev_jif;
Denis Vlasenko85818632007-04-19 14:47:11 +000093 /* int hist_iterations; */
94 unsigned total_pcpu;
95 /* unsigned long total_vsz; */
96#endif
Denis Vlasenko17e7f042008-09-25 10:48:06 +000097#if ENABLE_FEATURE_TOP_SMP_CPU
98 /* Per CPU samples: current and last */
99 jiffy_counts_t *cpu_jif, *cpu_prev_jif;
100 int num_cpus;
101#endif
Denis Vlasenko55761362007-10-16 22:53:05 +0000102 char line_buf[80];
Denys Vlasenko98a4c7c2010-02-04 15:00:15 +0100103}; //FIX_ALIASING; - large code growth
Denis Vlasenko4c1d88d2007-09-08 17:34:05 +0000104enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
Denis Vlasenko85818632007-04-19 14:47:11 +0000105#define G (*(struct globals*)&bb_common_bufsiz1)
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200106struct BUG_bad_size {
107 char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
108 char BUG_line_buf_too_small[LINE_BUF_SIZE > 80 ? 1 : -1];
109};
110#define INIT_G() do { } while (0)
Denis Vlasenko85818632007-04-19 14:47:11 +0000111#define top (G.top )
112#define ntop (G.ntop )
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000113#define sort_field (G.sort_field )
114#define inverted (G.inverted )
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000115#define smp_cpu_info (G.smp_cpu_info )
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000116#define initial_settings (G.initial_settings )
Denis Vlasenko85818632007-04-19 14:47:11 +0000117#define sort_function (G.sort_function )
Denis Vlasenko85818632007-04-19 14:47:11 +0000118#define prev_hist (G.prev_hist )
119#define prev_hist_count (G.prev_hist_count )
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000120#define cur_jif (G.cur_jif )
Denis Vlasenko85818632007-04-19 14:47:11 +0000121#define prev_jif (G.prev_jif )
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000122#define cpu_jif (G.cpu_jif )
123#define cpu_prev_jif (G.cpu_prev_jif )
124#define num_cpus (G.num_cpus )
Denis Vlasenko85818632007-04-19 14:47:11 +0000125#define total_pcpu (G.total_pcpu )
Denis Vlasenko4c1d88d2007-09-08 17:34:05 +0000126#define line_buf (G.line_buf )
Denis Vlasenko8bdba4d2007-08-29 18:18:08 +0000127
Denis Vlasenkocf7cf622008-03-19 19:38:46 +0000128enum {
129 OPT_d = (1 << 0),
130 OPT_n = (1 << 1),
131 OPT_b = (1 << 2),
Denys Vlasenko00528822009-09-11 23:26:42 +0200132 OPT_m = (1 << 3),
133 OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
Denis Vlasenkocf7cf622008-03-19 19:38:46 +0000134};
135#define OPT_BATCH_MODE (option_mask32 & OPT_b)
Eric Andersen08a72202002-09-30 20:52:10 +0000136
Denis Vlasenko85818632007-04-19 14:47:11 +0000137
Denis Vlasenkofa076802006-11-05 00:38:51 +0000138#if ENABLE_FEATURE_USE_TERMIOS
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000139static int pid_sort(top_status_t *P, top_status_t *Q)
Eric Andersen08a72202002-09-30 20:52:10 +0000140{
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000141 /* Buggy wrt pids with high bit set */
142 /* (linux pids are in [1..2^15-1]) */
Rob Landleyb2804552006-02-13 22:04:27 +0000143 return (Q->pid - P->pid);
Eric Andersen08a72202002-09-30 20:52:10 +0000144}
Mike Frysinger223b8872005-07-30 09:42:05 +0000145#endif
Eric Andersen08a72202002-09-30 20:52:10 +0000146
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000147static int mem_sort(top_status_t *P, top_status_t *Q)
Eric Andersen08a72202002-09-30 20:52:10 +0000148{
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000149 /* We want to avoid unsigned->signed and truncation errors */
Mike Frysinger0aa6ba52007-02-08 08:21:58 +0000150 if (Q->vsz < P->vsz) return -1;
151 return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
Eric Andersen08a72202002-09-30 20:52:10 +0000152}
153
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000154
Denis Vlasenko85818632007-04-19 14:47:11 +0000155#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000156
157static int pcpu_sort(top_status_t *P, top_status_t *Q)
Eric Andersen08a72202002-09-30 20:52:10 +0000158{
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000159 /* Buggy wrt ticks with high bit set */
160 /* Affects only processes for which ticks overflow */
161 return (int)Q->pcpu - (int)P->pcpu;
Eric Andersen08a72202002-09-30 20:52:10 +0000162}
163
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000164static int time_sort(top_status_t *P, top_status_t *Q)
Eric Andersen08a72202002-09-30 20:52:10 +0000165{
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000166 /* We want to avoid unsigned->signed and truncation errors */
167 if (Q->ticks < P->ticks) return -1;
168 return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
Eric Andersen08a72202002-09-30 20:52:10 +0000169}
170
Denis Vlasenkoac678ec2007-04-16 22:32:04 +0000171static int mult_lvl_cmp(void* a, void* b)
172{
Rob Landleyb2804552006-02-13 22:04:27 +0000173 int i, cmp_val;
Eric Andersen08a72202002-09-30 20:52:10 +0000174
Denis Vlasenkofa076802006-11-05 00:38:51 +0000175 for (i = 0; i < SORT_DEPTH; i++) {
Rob Landleyb2804552006-02-13 22:04:27 +0000176 cmp_val = (*sort_function[i])(a, b);
177 if (cmp_val != 0)
178 return cmp_val;
179 }
180 return 0;
Eric Andersen08a72202002-09-30 20:52:10 +0000181}
182
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000183static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
184{
185#if !ENABLE_FEATURE_TOP_SMP_CPU
Denis Vlasenko78862752009-03-03 11:55:31 +0000186 static const char fmt[] = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000187#else
Denis Vlasenko78862752009-03-03 11:55:31 +0000188 static const char fmt[] = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000189#endif
190 int ret;
191
192 if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
193 return 0;
194 ret = sscanf(line_buf, fmt,
195 &p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
196 &p_jif->iowait, &p_jif->irq, &p_jif->softirq,
197 &p_jif->steal);
Denis Vlasenko78862752009-03-03 11:55:31 +0000198 if (ret >= 4) {
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000199 p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
200 + p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
201 /* procps 2.x does not count iowait as busy time */
202 p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
203 }
204
205 return ret;
206}
Eric Andersen08a72202002-09-30 20:52:10 +0000207
Rob Landley997650b2006-04-24 23:13:46 +0000208static void get_jiffy_counts(void)
Rob Landleyb2804552006-02-13 22:04:27 +0000209{
Denis Vlasenko5415c852008-07-21 23:05:26 +0000210 FILE* fp = xfopen_for_read("stat");
Eric Andersen08a72202002-09-30 20:52:10 +0000211
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000212 /* We need to parse cumulative counts even if SMP CPU display is on,
213 * they are used to calculate per process CPU% */
214 prev_jif = cur_jif;
215 if (read_cpu_jiffy(fp, &cur_jif) < 4)
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000216 bb_error_msg_and_die("can't read /proc/stat");
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000217
218#if !ENABLE_FEATURE_TOP_SMP_CPU
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000219 fclose(fp);
220 return;
221#else
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000222 if (!smp_cpu_info) {
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000223 fclose(fp);
224 return;
225 }
226
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000227 if (!num_cpus) {
228 /* First time here. How many CPUs?
229 * There will be at least 1 /proc/stat line with cpu%d
230 */
231 while (1) {
232 cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
233 if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
234 break;
235 num_cpus++;
236 }
237 if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
238 smp_cpu_info = 0;
239
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000240 cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
241
242 /* Otherwise the first per cpu display shows all 100% idles */
243 usleep(50000);
244 } else { /* Non first time invocation */
245 jiffy_counts_t *tmp;
246 int i;
247
248 /* First switch the sample pointers: no need to copy */
249 tmp = cpu_prev_jif;
250 cpu_prev_jif = cpu_jif;
251 cpu_jif = tmp;
252
253 /* Get the new samples */
254 for (i = 0; i < num_cpus; i++)
255 read_cpu_jiffy(fp, &cpu_jif[i]);
256 }
257#endif
258 fclose(fp);
259}
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000260
Eric Andersen08a72202002-09-30 20:52:10 +0000261static void do_stats(void)
262{
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000263 top_status_t *cur;
Denis Vlasenko35fb5122006-11-01 09:16:49 +0000264 pid_t pid;
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000265 int i, last_i, n;
Rob Landley997650b2006-04-24 23:13:46 +0000266 struct save_hist *new_hist;
Eric Andersen08a72202002-09-30 20:52:10 +0000267
Rob Landley997650b2006-04-24 23:13:46 +0000268 get_jiffy_counts();
269 total_pcpu = 0;
Mike Frysinger0aa6ba52007-02-08 08:21:58 +0000270 /* total_vsz = 0; */
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000271 new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
Rob Landleyb2804552006-02-13 22:04:27 +0000272 /*
273 * Make a pass through the data to get stats.
274 */
Rob Landley997650b2006-04-24 23:13:46 +0000275 /* hist_iterations = 0; */
276 i = 0;
277 for (n = 0; n < ntop; n++) {
Rob Landleyb2804552006-02-13 22:04:27 +0000278 cur = top + n;
279
280 /*
281 * Calculate time in cur process. Time is sum of user time
Rob Landley997650b2006-04-24 23:13:46 +0000282 * and system time
Rob Landleyb2804552006-02-13 22:04:27 +0000283 */
Rob Landleyb2804552006-02-13 22:04:27 +0000284 pid = cur->pid;
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000285 new_hist[n].ticks = cur->ticks;
Rob Landley997650b2006-04-24 23:13:46 +0000286 new_hist[n].pid = pid;
Rob Landleyb2804552006-02-13 22:04:27 +0000287
288 /* find matching entry from previous pass */
Rob Landley997650b2006-04-24 23:13:46 +0000289 cur->pcpu = 0;
290 /* do not start at index 0, continue at last used one
291 * (brought hist_iterations from ~14000 down to 172) */
292 last_i = i;
293 if (prev_hist_count) do {
294 if (prev_hist[i].pid == pid) {
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000295 cur->pcpu = cur->ticks - prev_hist[i].ticks;
296 total_pcpu += cur->pcpu;
Rob Landleyb2804552006-02-13 22:04:27 +0000297 break;
298 }
Rob Landley997650b2006-04-24 23:13:46 +0000299 i = (i+1) % prev_hist_count;
300 /* hist_iterations++; */
301 } while (i != last_i);
Mike Frysinger0aa6ba52007-02-08 08:21:58 +0000302 /* total_vsz += cur->vsz; */
Eric Andersen08a72202002-09-30 20:52:10 +0000303 }
304
305 /*
Rob Landleyb2804552006-02-13 22:04:27 +0000306 * Save cur frame's information.
Eric Andersen08a72202002-09-30 20:52:10 +0000307 */
Rob Landley997650b2006-04-24 23:13:46 +0000308 free(prev_hist);
309 prev_hist = new_hist;
310 prev_hist_count = ntop;
Eric Andersen08a72202002-09-30 20:52:10 +0000311}
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000312
Denis Vlasenkofa076802006-11-05 00:38:51 +0000313#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
Eric Andersen08a72202002-09-30 20:52:10 +0000314
Denis Vlasenko6ee023c2007-08-23 10:52:52 +0000315#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
316/* formats 7 char string (8 with terminating NUL) */
317static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
318{
319 unsigned t;
320 if (value >= total) { /* 100% ? */
321 strcpy(pbuf, " 100% ");
322 return pbuf;
323 }
324 /* else generate " [N/space]N.N% " string */
325 value = 1000 * value / total;
326 t = value / 100;
327 value = value % 100;
328 pbuf[0] = ' ';
329 pbuf[1] = t ? t + '0' : ' ';
330 pbuf[2] = '0' + (value / 10);
331 pbuf[3] = '.';
332 pbuf[4] = '0' + (value % 10);
333 pbuf[5] = '%';
334 pbuf[6] = ' ';
335 pbuf[7] = '\0';
336 return pbuf;
337}
338#endif
339
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000340#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
341static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
342{
343 /*
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000344 * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000345 */
346 unsigned total_diff;
347 jiffy_counts_t *p_jif, *p_prev_jif;
348 int i;
Denys Vlasenko00528822009-09-11 23:26:42 +0200349# if ENABLE_FEATURE_TOP_SMP_CPU
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000350 int n_cpu_lines;
Denys Vlasenko00528822009-09-11 23:26:42 +0200351# endif
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000352
353 /* using (unsigned) casts to make operations cheaper */
Denys Vlasenkofe737982009-09-12 15:11:50 +0200354# define CALC_TOTAL_DIFF do { \
355 total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
356 if (total_diff == 0) total_diff = 1; \
357} while (0)
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000358
Denys Vlasenko00528822009-09-11 23:26:42 +0200359# if ENABLE_FEATURE_TOP_DECIMALS
360# define CALC_STAT(xxx) char xxx[8]
361# define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
362# define FMT "%s"
363# else
364# define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
365# define SHOW_STAT(xxx) xxx
366# define FMT "%4u%% "
367# endif
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000368
Denys Vlasenko00528822009-09-11 23:26:42 +0200369# if !ENABLE_FEATURE_TOP_SMP_CPU
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000370 {
371 i = 1;
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000372 p_jif = &cur_jif;
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000373 p_prev_jif = &prev_jif;
Denys Vlasenko00528822009-09-11 23:26:42 +0200374# else
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000375 /* Loop thru CPU(s) */
376 n_cpu_lines = smp_cpu_info ? num_cpus : 1;
377 if (n_cpu_lines > *lines_rem_p)
378 n_cpu_lines = *lines_rem_p;
379
380 for (i = 0; i < n_cpu_lines; i++) {
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000381 p_jif = &cpu_jif[i];
382 p_prev_jif = &cpu_prev_jif[i];
Denys Vlasenko00528822009-09-11 23:26:42 +0200383# endif
Denys Vlasenkofe737982009-09-12 15:11:50 +0200384 CALC_TOTAL_DIFF;
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000385
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000386 { /* Need a block: CALC_STAT are declarations */
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000387 CALC_STAT(usr);
388 CALC_STAT(sys);
389 CALC_STAT(nic);
390 CALC_STAT(idle);
391 CALC_STAT(iowait);
392 CALC_STAT(irq);
393 CALC_STAT(softirq);
394 /*CALC_STAT(steal);*/
395
396 snprintf(scrbuf, scr_width,
397 /* Barely fits in 79 chars when in "decimals" mode. */
Denys Vlasenko00528822009-09-11 23:26:42 +0200398# if ENABLE_FEATURE_TOP_SMP_CPU
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000399 "CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
400 (smp_cpu_info ? utoa(i) : ""),
Denys Vlasenko00528822009-09-11 23:26:42 +0200401# else
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000402 "CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
Denys Vlasenko00528822009-09-11 23:26:42 +0200403# endif
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000404 SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
405 SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
406 /*, SHOW_STAT(steal) - what is this 'steal' thing? */
407 /* I doubt anyone wants to know it */
408 );
409 puts(scrbuf);
410 }
411 }
Denys Vlasenko00528822009-09-11 23:26:42 +0200412# undef SHOW_STAT
413# undef CALC_STAT
414# undef FMT
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000415 *lines_rem_p -= i;
416}
417#else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
Denys Vlasenko00528822009-09-11 23:26:42 +0200418# define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000419#endif
420
421static unsigned long display_header(int scr_width, int *lines_rem_p)
Eric Andersen420b2082002-09-17 22:14:58 +0000422{
423 FILE *fp;
424 char buf[80];
Rob Landley997650b2006-04-24 23:13:46 +0000425 char scrbuf[80];
Eric Andersen420b2082002-09-17 22:14:58 +0000426 unsigned long total, used, mfree, shared, buffers, cached;
Denis Vlasenko110967a2007-07-15 19:27:48 +0000427
Eric Andersen420b2082002-09-17 22:14:58 +0000428 /* read memory info */
Denis Vlasenko5415c852008-07-21 23:05:26 +0000429 fp = xfopen_for_read("meminfo");
Eric Andersen420b2082002-09-17 22:14:58 +0000430
Eric Andersen7857c032003-10-11 18:47:20 +0000431 /*
432 * Old kernels (such as 2.4.x) had a nice summary of memory info that
433 * we could parse, however this is gone entirely in 2.6. Try parsing
434 * the old way first, and if that fails, parse each field manually.
435 *
436 * First, we read in the first line. Old kernels will have bogus
437 * strings we don't care about, whereas new kernels will start right
438 * out with MemTotal:
"Vladimir N. Oleynik"70678bc2005-11-29 12:32:33 +0000439 * -- PFM.
Eric Andersen7857c032003-10-11 18:47:20 +0000440 */
441 if (fscanf(fp, "MemTotal: %lu %s\n", &total, buf) != 2) {
"Vladimir N. Oleynik"70678bc2005-11-29 12:32:33 +0000442 fgets(buf, sizeof(buf), fp); /* skip first line */
Eric Andersen7857c032003-10-11 18:47:20 +0000443
444 fscanf(fp, "Mem: %lu %lu %lu %lu %lu %lu",
Denis Vlasenko5a654472007-06-10 17:11:59 +0000445 &total, &used, &mfree, &shared, &buffers, &cached);
446 /* convert to kilobytes */
447 used /= 1024;
448 mfree /= 1024;
449 shared /= 1024;
450 buffers /= 1024;
451 cached /= 1024;
452 total /= 1024;
Eric Andersen7857c032003-10-11 18:47:20 +0000453 } else {
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000454 /*
Eric Andersen7857c032003-10-11 18:47:20 +0000455 * Revert to manual parsing, which incidentally already has the
456 * sizes in kilobytes. This should be safe for both 2.4 and
457 * 2.6.
458 */
Eric Andersen7857c032003-10-11 18:47:20 +0000459 fscanf(fp, "MemFree: %lu %s\n", &mfree, buf);
460
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000461 /*
Eric Andersen7857c032003-10-11 18:47:20 +0000462 * MemShared: is no longer present in 2.6. Report this as 0,
463 * to maintain consistent behavior with normal procps.
464 */
465 if (fscanf(fp, "MemShared: %lu %s\n", &shared, buf) != 2)
466 shared = 0;
467
468 fscanf(fp, "Buffers: %lu %s\n", &buffers, buf);
469 fscanf(fp, "Cached: %lu %s\n", &cached, buf);
470
471 used = total - mfree;
Eric Andersen420b2082002-09-17 22:14:58 +0000472 }
473 fclose(fp);
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000474
Denis Vlasenko110967a2007-07-15 19:27:48 +0000475 /* output memory info */
Denis Vlasenko6b06cb82008-05-15 21:30:45 +0000476 if (scr_width > (int)sizeof(scrbuf))
Rob Landley997650b2006-04-24 23:13:46 +0000477 scr_width = sizeof(scrbuf);
478 snprintf(scrbuf, scr_width,
Denis Vlasenkoc1166c32007-07-15 19:23:38 +0000479 "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
Rob Landleyb2804552006-02-13 22:04:27 +0000480 used, mfree, shared, buffers, cached);
Denys Vlasenkod9a3e892010-05-16 23:42:13 +0200481 /* go to top & clear to the end of screen */
482 printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000483 (*lines_rem_p)--;
Denis Vlasenkof7996f32007-01-11 17:20:00 +0000484
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000485 /* Display CPU time split as percentage of total time
486 * This displays either a cumulative line or one line per CPU
Denis Vlasenko856be772007-08-17 08:29:48 +0000487 */
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000488 display_cpus(scr_width, scrbuf, lines_rem_p);
Denis Vlasenko5a654472007-06-10 17:11:59 +0000489
Denis Vlasenko110967a2007-07-15 19:27:48 +0000490 /* read load average as a string */
491 buf[0] = '\0';
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000492 open_read_close("loadavg", buf, sizeof(buf) - 1);
493 buf[sizeof(buf) - 1] = '\n';
494 *strchr(buf, '\n') = '\0';
Denis Vlasenko25d80622006-10-27 09:34:22 +0000495 snprintf(scrbuf, scr_width, "Load average: %s", buf);
Denis Vlasenko5a654472007-06-10 17:11:59 +0000496 puts(scrbuf);
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000497 (*lines_rem_p)--;
Rob Landley997650b2006-04-24 23:13:46 +0000498
Eric Andersen7857c032003-10-11 18:47:20 +0000499 return total;
Eric Andersen420b2082002-09-17 22:14:58 +0000500}
501
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000502static NOINLINE void display_process_list(int lines_rem, int scr_width)
Eric Andersen420b2082002-09-17 22:14:58 +0000503{
Rob Landley997650b2006-04-24 23:13:46 +0000504 enum {
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000505 BITS_PER_INT = sizeof(int) * 8
Rob Landley997650b2006-04-24 23:13:46 +0000506 };
507
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000508 top_status_t *s;
Mike Frysinger0aa6ba52007-02-08 08:21:58 +0000509 char vsz_str_buf[8];
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000510 unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
Denis Vlasenko74511962007-06-11 16:31:55 +0000511 /* xxx_shift and xxx_scale variables allow us to replace
512 * expensive divides with multiply and shift */
513 unsigned pmem_shift, pmem_scale, pmem_half;
Denis Vlasenkofa076802006-11-05 00:38:51 +0000514#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Denys Vlasenko36df0482009-10-19 16:07:28 +0200515 unsigned tmp_unsigned;
Denis Vlasenko74511962007-06-11 16:31:55 +0000516 unsigned pcpu_shift, pcpu_scale, pcpu_half;
Denis Vlasenkofa076802006-11-05 00:38:51 +0000517 unsigned busy_jifs;
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000518#endif
Rob Landley997650b2006-04-24 23:13:46 +0000519
Eric Andersen420b2082002-09-17 22:14:58 +0000520 /* what info of the processes is shown */
Denys Vlasenkod9a3e892010-05-16 23:42:13 +0200521 printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000522 " PID PPID USER STAT VSZ %MEM"
Denys Vlasenko9be4f312009-11-07 04:06:31 +0100523 IF_FEATURE_TOP_SMP_PROCESS(" CPU")
524 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000525 " COMMAND");
526 lines_rem--;
Rob Landley997650b2006-04-24 23:13:46 +0000527
Denis Vlasenko24c5fba2007-07-15 19:25:01 +0000528#if ENABLE_FEATURE_TOP_DECIMALS
Denys Vlasenko00528822009-09-11 23:26:42 +0200529# define UPSCALE 1000
530# define CALC_STAT(name, val) div_t name = div((val), 10)
531# define SHOW_STAT(name) name.quot, '0'+name.rem
532# define FMT "%3u.%c"
Denis Vlasenko24c5fba2007-07-15 19:25:01 +0000533#else
Denys Vlasenko00528822009-09-11 23:26:42 +0200534# define UPSCALE 100
535# define CALC_STAT(name, val) unsigned name = (val)
536# define SHOW_STAT(name) name
537# define FMT "%4u%%"
Denis Vlasenko24c5fba2007-07-15 19:25:01 +0000538#endif
Rob Landley997650b2006-04-24 23:13:46 +0000539 /*
Mike Frysinger0aa6ba52007-02-08 08:21:58 +0000540 * MEM% = s->vsz/MemTotal
Rob Landley997650b2006-04-24 23:13:46 +0000541 */
Denis Vlasenko74511962007-06-11 16:31:55 +0000542 pmem_shift = BITS_PER_INT-11;
543 pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
Mike Frysinger0aa6ba52007-02-08 08:21:58 +0000544 /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
Rob Landley997650b2006-04-24 23:13:46 +0000545 while (pmem_scale >= 512) {
546 pmem_scale /= 4;
547 pmem_shift -= 2;
548 }
Denis Vlasenko74511962007-06-11 16:31:55 +0000549 pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
Denis Vlasenkofa076802006-11-05 00:38:51 +0000550#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000551 busy_jifs = cur_jif.busy - prev_jif.busy;
Denis Vlasenkofa076802006-11-05 00:38:51 +0000552 /* This happens if there were lots of short-lived processes
553 * between two top updates (e.g. compilation) */
554 if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
555
Rob Landley997650b2006-04-24 23:13:46 +0000556 /*
557 * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
558 * (pcpu is delta of sys+user time between samples)
559 */
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000560 /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
Rob Landley997650b2006-04-24 23:13:46 +0000561 * in 0..~64000 range (HZ*update_interval).
562 * we assume that unsigned is at least 32-bit.
563 */
564 pcpu_shift = 6;
Denys Vlasenkofe737982009-09-12 15:11:50 +0200565 pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs;
566 if (pcpu_scale == 0)
567 pcpu_scale = 1;
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000568 while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
Rob Landley997650b2006-04-24 23:13:46 +0000569 pcpu_scale *= 4;
570 pcpu_shift += 2;
571 }
Denys Vlasenkofe737982009-09-12 15:11:50 +0200572 tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
573 if (tmp_unsigned != 0)
574 pcpu_scale /= tmp_unsigned;
Rob Landley997650b2006-04-24 23:13:46 +0000575 /* we want (s->pcpu * pcpu_scale) to never overflow */
576 while (pcpu_scale >= 1024) {
577 pcpu_scale /= 4;
578 pcpu_shift -= 2;
579 }
Denis Vlasenko74511962007-06-11 16:31:55 +0000580 pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
Rob Landley997650b2006-04-24 23:13:46 +0000581 /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
Eric Andersen08a72202002-09-30 20:52:10 +0000582#endif
Denis Vlasenko74511962007-06-11 16:31:55 +0000583
Bernhard Reutner-Fischera985d302008-02-11 11:44:38 +0000584 /* Ok, all preliminary data is ready, go through the list */
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000585 scr_width += 2; /* account for leading '\n' and trailing NUL */
586 if (lines_rem > ntop)
587 lines_rem = ntop;
588 s = top;
589 while (--lines_rem >= 0) {
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000590 unsigned col;
Denis Vlasenko74511962007-06-11 16:31:55 +0000591 CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
592#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
593 CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
594#endif
Eric Andersen420b2082002-09-17 22:14:58 +0000595
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000596 if (s->vsz >= 100000)
Denis Vlasenkob308d812007-08-28 19:35:34 +0000597 sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
Manuel Novoa III d4993302002-09-18 19:27:10 +0000598 else
Mike Frysinger0aa6ba52007-02-08 08:21:58 +0000599 sprintf(vsz_str_buf, "%7ld", s->vsz);
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000600 /* PID PPID USER STAT VSZ %MEM [%CPU] COMMAND */
Denis Vlasenko4c1d88d2007-09-08 17:34:05 +0000601 col = snprintf(line_buf, scr_width,
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000602 "\n" "%5u%6u %-8.8s %s%s" FMT
Denys Vlasenko9be4f312009-11-07 04:06:31 +0100603 IF_FEATURE_TOP_SMP_PROCESS(" %3d")
604 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT)
Denis Vlasenko74511962007-06-11 16:31:55 +0000605 " ",
606 s->pid, s->ppid, get_cached_username(s->uid),
607 s->state, vsz_str_buf,
608 SHOW_STAT(pmem)
Denys Vlasenko9be4f312009-11-07 04:06:31 +0100609 IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
610 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
Denis Vlasenko74511962007-06-11 16:31:55 +0000611 );
Denis Vlasenko6b06cb82008-05-15 21:30:45 +0000612 if ((int)(col + 1) < scr_width)
Denys Vlasenko3a0f6f22009-09-12 00:15:34 +0200613 read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm);
Denis Vlasenko4c1d88d2007-09-08 17:34:05 +0000614 fputs(line_buf, stdout);
Bernhard Reutner-Fischere2922e42006-05-19 12:48:56 +0000615 /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000616 cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
Eric Andersen420b2082002-09-17 22:14:58 +0000617 s++;
Eric Andersen08a72202002-09-30 20:52:10 +0000618 }
Rob Landley997650b2006-04-24 23:13:46 +0000619 /* printf(" %d", hist_iterations); */
Denis Vlasenko4daad902007-09-27 10:20:47 +0000620 bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
Denys Vlasenko8131eea2009-11-02 14:19:51 +0100621 fflush_all();
Eric Andersen44608e92002-10-22 12:21:15 +0000622}
Denis Vlasenko24c5fba2007-07-15 19:25:01 +0000623#undef UPSCALE
Denis Vlasenko74511962007-06-11 16:31:55 +0000624#undef SHOW_STAT
625#undef CALC_STAT
626#undef FMT
Eric Andersen44608e92002-10-22 12:21:15 +0000627
628static void clearmems(void)
629{
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000630 clear_username_cache();
Eric Andersen08a72202002-09-30 20:52:10 +0000631 free(top);
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000632 top = NULL;
Eric Andersen08a72202002-09-30 20:52:10 +0000633 ntop = 0;
634}
635
Denis Vlasenkofa076802006-11-05 00:38:51 +0000636#if ENABLE_FEATURE_USE_TERMIOS
Eric Andersen08a72202002-09-30 20:52:10 +0000637
Eric Andersen08a72202002-09-30 20:52:10 +0000638static void reset_term(void)
639{
Denis Vlasenko202ac502008-11-05 13:20:58 +0000640 tcsetattr_stdin_TCSANOW(&initial_settings);
Denis Vlasenko8bdba4d2007-08-29 18:18:08 +0000641 if (ENABLE_FEATURE_CLEAN_UP) {
642 clearmems();
Denys Vlasenko00528822009-09-11 23:26:42 +0200643# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Denis Vlasenko8bdba4d2007-08-29 18:18:08 +0000644 free(prev_hist);
Denys Vlasenko00528822009-09-11 23:26:42 +0200645# endif
Denis Vlasenko8bdba4d2007-08-29 18:18:08 +0000646 }
Eric Andersen08a72202002-09-30 20:52:10 +0000647}
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000648
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000649static void sig_catcher(int sig UNUSED_PARAM)
Eric Andersen08a72202002-09-30 20:52:10 +0000650{
651 reset_term();
Bernhard Reutner-Fischer636a1f82008-05-19 09:29:47 +0000652 exit(EXIT_FAILURE);
Eric Andersen08a72202002-09-30 20:52:10 +0000653}
Denis Vlasenkofa076802006-11-05 00:38:51 +0000654#endif /* FEATURE_USE_TERMIOS */
Eric Andersen08a72202002-09-30 20:52:10 +0000655
Denis Vlasenkoe7c1ad12007-09-08 17:21:01 +0000656/*
657 * TOPMEM support
658 */
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000659
660typedef unsigned long mem_t;
661
662typedef struct topmem_status_t {
663 unsigned pid;
664 char comm[COMM_LEN];
665 /* vsz doesn't count /dev/xxx mappings except /dev/zero */
666 mem_t vsz ;
667 mem_t vszrw ;
668 mem_t rss ;
669 mem_t rss_sh ;
670 mem_t dirty ;
671 mem_t dirty_sh;
672 mem_t stack ;
673} topmem_status_t;
674
675enum { NUM_SORT_FIELD = 7 };
676
677#define topmem ((topmem_status_t*)top)
678
679#if ENABLE_FEATURE_TOPMEM
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000680
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000681static int topmem_sort(char *a, char *b)
682{
683 int n;
684 mem_t l, r;
685
686 n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
687 l = *(mem_t*)(a + n);
688 r = *(mem_t*)(b + n);
Denys Vlasenkoa95ce932010-07-13 12:13:04 +0200689 if (l == r) {
690 l = ((topmem_status_t*)a)->dirty;
691 r = ((topmem_status_t*)b)->dirty;
692 }
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000693 /* We want to avoid unsigned->signed and truncation errors */
694 /* l>r: -1, l=r: 0, l<r: 1 */
695 n = (l > r) ? -1 : (l != r);
696 return inverted ? -n : n;
697}
698
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000699/* display header info (meminfo / loadavg) */
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000700static void display_topmem_header(int scr_width, int *lines_rem_p)
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000701{
Maksym Kryzhanovskyy87496aa2010-06-06 08:24:39 +0200702 enum {
703 TOTAL = 0, MFREE, BUF, CACHE,
704 SWAPTOTAL, SWAPFREE, DIRTY,
705 MWRITE, ANON, MAP, SLAB,
706 NUM_FIELDS
707 };
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200708 static const char match[NUM_FIELDS][12] = {
Maksym Kryzhanovskyy87496aa2010-06-06 08:24:39 +0200709 "\x09" "MemTotal:", // TOTAL
710 "\x08" "MemFree:", // MFREE
711 "\x08" "Buffers:", // BUF
712 "\x07" "Cached:", // CACHE
713 "\x0a" "SwapTotal:", // SWAPTOTAL
714 "\x09" "SwapFree:", // SWAPFREE
715 "\x06" "Dirty:", // DIRTY
716 "\x0a" "Writeback:", // MWRITE
717 "\x0a" "AnonPages:", // ANON
718 "\x07" "Mapped:", // MAP
719 "\x05" "Slab:", // SLAB
720 };
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200721 char meminfo_buf[4 * 1024];
722 const char *Z[NUM_FIELDS];
Denis Vlasenko6b06cb82008-05-15 21:30:45 +0000723 unsigned i;
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200724 int sz;
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000725
Maksym Kryzhanovskyy87496aa2010-06-06 08:24:39 +0200726 for (i = 0; i < NUM_FIELDS; i++)
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200727 Z[i] = "?";
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000728
729 /* read memory info */
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200730 sz = open_read_close("meminfo", meminfo_buf, sizeof(meminfo_buf) - 1);
731 if (sz >= 0) {
732 char *p = meminfo_buf;
733 meminfo_buf[sz] = '\0';
734 /* Note that fields always appear in the match[] order */
Maksym Kryzhanovskyy87496aa2010-06-06 08:24:39 +0200735 for (i = 0; i < NUM_FIELDS; i++) {
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200736 char *found = strstr(p, match[i] + 1);
737 if (found) {
Maksym Kryzhanovskyy87496aa2010-06-06 08:24:39 +0200738 /* Cut "NNNN" out of " NNNN kb" */
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200739 char *s = skip_whitespace(found + match[i][0]);
740 p = skip_non_whitespace(s);
741 *p++ = '\0';
742 Z[i] = s;
Maksym Kryzhanovskyy87496aa2010-06-06 08:24:39 +0200743 }
744 }
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000745 }
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000746
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200747 snprintf(line_buf, LINE_BUF_SIZE,
Denys Vlasenko917693b2010-03-04 12:50:59 +0100748 "Mem total:%s anon:%s map:%s free:%s",
Maksym Kryzhanovskyy87496aa2010-06-06 08:24:39 +0200749 Z[TOTAL], Z[ANON], Z[MAP], Z[MFREE]);
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200750 printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf);
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000751
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200752 snprintf(line_buf, LINE_BUF_SIZE,
Denys Vlasenko917693b2010-03-04 12:50:59 +0100753 " slab:%s buf:%s cache:%s dirty:%s write:%s",
Maksym Kryzhanovskyy87496aa2010-06-06 08:24:39 +0200754 Z[SLAB], Z[BUF], Z[CACHE], Z[DIRTY], Z[MWRITE]);
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200755 printf("%.*s\n", scr_width, line_buf);
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000756
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200757 snprintf(line_buf, LINE_BUF_SIZE,
Denys Vlasenko917693b2010-03-04 12:50:59 +0100758 "Swap total:%s free:%s", // TODO: % used?
Maksym Kryzhanovskyy87496aa2010-06-06 08:24:39 +0200759 Z[SWAPTOTAL], Z[SWAPFREE]);
Denys Vlasenkod94332f2010-06-06 17:40:54 +0200760 printf("%.*s\n", scr_width, line_buf);
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000761
762 (*lines_rem_p) -= 3;
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000763}
764
Denis Vlasenko56ea65c2008-01-06 03:26:53 +0000765static void ulltoa6_and_space(unsigned long long ul, char buf[6])
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000766{
Denis Vlasenko56ea65c2008-01-06 03:26:53 +0000767 /* see http://en.wikipedia.org/wiki/Tera */
768 smart_ulltoa5(ul, buf, " mgtpezy");
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000769 buf[5] = ' ';
770}
771
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000772static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000773{
774#define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
775#define MIN_WIDTH sizeof(HDR_STR)
776 const topmem_status_t *s = topmem;
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000777
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000778 display_topmem_header(scr_width, &lines_rem);
Denis Vlasenko4c1d88d2007-09-08 17:34:05 +0000779 strcpy(line_buf, HDR_STR " COMMAND");
780 line_buf[5 + sort_field * 6] = '*';
781 printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000782 lines_rem--;
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000783
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000784 if (lines_rem > ntop)
785 lines_rem = ntop;
786 while (--lines_rem >= 0) {
787 /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
Denis Vlasenko56ea65c2008-01-06 03:26:53 +0000788 ulltoa6_and_space(s->pid , &line_buf[0*6]);
789 ulltoa6_and_space(s->vsz , &line_buf[1*6]);
790 ulltoa6_and_space(s->vszrw , &line_buf[2*6]);
791 ulltoa6_and_space(s->rss , &line_buf[3*6]);
792 ulltoa6_and_space(s->rss_sh , &line_buf[4*6]);
793 ulltoa6_and_space(s->dirty , &line_buf[5*6]);
794 ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
795 ulltoa6_and_space(s->stack , &line_buf[7*6]);
Denis Vlasenko4c1d88d2007-09-08 17:34:05 +0000796 line_buf[8*6] = '\0';
Denis Vlasenko6b06cb82008-05-15 21:30:45 +0000797 if (scr_width > (int)MIN_WIDTH) {
Denis Vlasenko4c1d88d2007-09-08 17:34:05 +0000798 read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000799 }
Denis Vlasenko4c1d88d2007-09-08 17:34:05 +0000800 printf("\n""%.*s", scr_width, line_buf);
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000801 s++;
802 }
Denis Vlasenko4daad902007-09-27 10:20:47 +0000803 bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
Denys Vlasenko8131eea2009-11-02 14:19:51 +0100804 fflush_all();
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000805#undef HDR_STR
806#undef MIN_WIDTH
807}
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000808
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000809#else
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000810void display_topmem_process_list(int lines_rem, int scr_width);
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000811int topmem_sort(char *a, char *b);
812#endif /* TOPMEM */
813
Denis Vlasenkoe7c1ad12007-09-08 17:21:01 +0000814/*
815 * end TOPMEM support
816 */
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000817
818enum {
819 TOP_MASK = 0
820 | PSSCAN_PID
821 | PSSCAN_PPID
822 | PSSCAN_VSZ
823 | PSSCAN_STIME
824 | PSSCAN_UTIME
825 | PSSCAN_STATE
826 | PSSCAN_COMM
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000827 | PSSCAN_CPU
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000828 | PSSCAN_UIDGID,
829 TOPMEM_MASK = 0
830 | PSSCAN_PID
831 | PSSCAN_SMAPS
832 | PSSCAN_COMM,
833};
834
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +0000835int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000836int top_main(int argc UNUSED_PARAM, char **argv)
Eric Andersen420b2082002-09-17 22:14:58 +0000837{
Denis Vlasenkoe7c1ad12007-09-08 17:21:01 +0000838 int iterations;
Denis Vlasenko55995022008-05-18 22:28:26 +0000839 unsigned lines, col;
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000840 int lines_rem;
Denis Vlasenko55995022008-05-18 22:28:26 +0000841 unsigned interval;
Denis Vlasenkoc8842212008-09-25 11:42:10 +0000842 char *str_interval, *str_iterations;
Denys Vlasenkod75295c2009-09-21 23:58:43 +0200843 unsigned scan_mask = TOP_MASK;
Denis Vlasenkofa076802006-11-05 00:38:51 +0000844#if ENABLE_FEATURE_USE_TERMIOS
Eric Andersen08a72202002-09-30 20:52:10 +0000845 struct termios new_settings;
Denis Vlasenkob308d812007-08-28 19:35:34 +0000846 struct pollfd pfd[1];
Eric Andersen08a72202002-09-30 20:52:10 +0000847 unsigned char c;
Denis Vlasenkob308d812007-08-28 19:35:34 +0000848
849 pfd[0].fd = 0;
850 pfd[0].events = POLLIN;
Denys Vlasenko00528822009-09-11 23:26:42 +0200851#endif
Eric Andersen08a72202002-09-30 20:52:10 +0000852
Denis Vlasenkoe7c1ad12007-09-08 17:21:01 +0000853 INIT_G();
854
Denis Vlasenkocf7cf622008-03-19 19:38:46 +0000855 interval = 5; /* default update interval is 5 seconds */
Denis Vlasenkoe7c1ad12007-09-08 17:21:01 +0000856 iterations = 0; /* infinite */
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000857#if ENABLE_FEATURE_TOP_SMP_CPU
858 /*num_cpus = 0;*/
859 /*smp_cpu_info = 0;*/ /* to start with show aggregate */
Denis Vlasenko35840ab2008-09-25 11:11:37 +0000860 cpu_jif = &cur_jif;
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000861 cpu_prev_jif = &prev_jif;
862#endif
Denis Vlasenko85818632007-04-19 14:47:11 +0000863
Denis Vlasenkocf7cf622008-03-19 19:38:46 +0000864 /* all args are options; -n NUM */
Denys Vlasenko00528822009-09-11 23:26:42 +0200865 opt_complementary = "-"; /* options can be specified w/o dash */
866 col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations);
867#if ENABLE_FEATURE_TOPMEM
868 if (col & OPT_m) /* -m (busybox specific) */
869 scan_mask = TOPMEM_MASK;
870#endif
Denis Vlasenkoc8842212008-09-25 11:42:10 +0000871 if (col & OPT_d) {
Denys Vlasenko00528822009-09-11 23:26:42 +0200872 /* work around for "-d 1" -> "-d -1" done by getopt32
873 * (opt_complementary == "-" does this) */
Denis Vlasenkoc8842212008-09-25 11:42:10 +0000874 if (str_interval[0] == '-')
875 str_interval++;
Denis Vlasenkob308d812007-08-28 19:35:34 +0000876 /* Need to limit it to not overflow poll timeout */
Denis Vlasenkoc8842212008-09-25 11:42:10 +0000877 interval = xatou16(str_interval);
878 }
879 if (col & OPT_n) {
880 if (str_iterations[0] == '-')
881 str_iterations++;
882 iterations = xatou(str_iterations);
Denis Vlasenkob308d812007-08-28 19:35:34 +0000883 }
Eric Andersen420b2082002-09-17 22:14:58 +0000884
Eric Andersen44608e92002-10-22 12:21:15 +0000885 /* change to /proc */
Rob Landleyd921b2e2006-08-03 15:41:12 +0000886 xchdir("/proc");
Denis Vlasenkofa076802006-11-05 00:38:51 +0000887#if ENABLE_FEATURE_USE_TERMIOS
Eric Andersen08a72202002-09-30 20:52:10 +0000888 tcgetattr(0, (void *) &initial_settings);
Denis Vlasenko8bdba4d2007-08-29 18:18:08 +0000889 memcpy(&new_settings, &initial_settings, sizeof(new_settings));
Denis Vlasenko42dfcd22006-09-09 12:55:02 +0000890 /* unbuffered input, turn off echo */
891 new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
Eric Andersen08a72202002-09-30 20:52:10 +0000892
Denis Vlasenkocf7cf622008-03-19 19:38:46 +0000893 bb_signals(BB_FATAL_SIGS, sig_catcher);
Denis Vlasenko202ac502008-11-05 13:20:58 +0000894 tcsetattr_stdin_TCSANOW(&new_settings);
Denys Vlasenko00528822009-09-11 23:26:42 +0200895#endif
Mike Frysinger223b8872005-07-30 09:42:05 +0000896
Denis Vlasenkofa076802006-11-05 00:38:51 +0000897#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Eric Andersen08a72202002-09-30 20:52:10 +0000898 sort_function[0] = pcpu_sort;
899 sort_function[1] = mem_sort;
900 sort_function[2] = time_sort;
901#else
Denis Vlasenko8bdba4d2007-08-29 18:18:08 +0000902 sort_function[0] = mem_sort;
Denys Vlasenko00528822009-09-11 23:26:42 +0200903#endif
Mike Frysinger223b8872005-07-30 09:42:05 +0000904
Eric Andersen08a72202002-09-30 20:52:10 +0000905 while (1) {
Denis Vlasenko459e4d62006-11-05 00:43:51 +0000906 procps_status_t *p = NULL;
Eric Andersen44608e92002-10-22 12:21:15 +0000907
Denis Vlasenkoe7c1ad12007-09-08 17:21:01 +0000908 lines = 24; /* default */
Rob Landley997650b2006-04-24 23:13:46 +0000909 col = 79;
Denis Vlasenkofa076802006-11-05 00:38:51 +0000910#if ENABLE_FEATURE_USE_TERMIOS
Denis Vlasenkocf7cf622008-03-19 19:38:46 +0000911 /* We output to stdout, we need size of stdout (not stdin)! */
912 get_terminal_width_height(STDOUT_FILENO, &col, &lines);
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000913 if (lines < 5 || col < 10) {
Rob Landley997650b2006-04-24 23:13:46 +0000914 sleep(interval);
915 continue;
916 }
Denys Vlasenko00528822009-09-11 23:26:42 +0200917#endif
Denis Vlasenko4c1d88d2007-09-08 17:34:05 +0000918 if (col > LINE_BUF_SIZE-2) /* +2 bytes for '\n', NUL, */
919 col = LINE_BUF_SIZE-2;
Rob Landley997650b2006-04-24 23:13:46 +0000920
921 /* read process IDs & status for all the processes */
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000922 while ((p = procps_scan(p, scan_mask)) != NULL) {
923 int n;
Denys Vlasenkob410d4a2009-09-19 22:29:42 +0200924#if ENABLE_FEATURE_TOPMEM
925 if (scan_mask != TOPMEM_MASK)
926#endif
927 {
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000928 n = ntop;
Denis Vlasenko27842282008-08-04 13:20:36 +0000929 top = xrealloc_vector(top, 6, ntop++);
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000930 top[n].pid = p->pid;
931 top[n].ppid = p->ppid;
932 top[n].vsz = p->vsz;
Denis Vlasenko3bba5452006-12-30 17:57:03 +0000933#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000934 top[n].ticks = p->stime + p->utime;
Denis Vlasenko3bba5452006-12-30 17:57:03 +0000935#endif
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000936 top[n].uid = p->uid;
937 strcpy(top[n].state, p->state);
938 strcpy(top[n].comm, p->comm);
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000939#if ENABLE_FEATURE_TOP_SMP_PROCESS
940 top[n].last_seen_on_cpu = p->last_seen_on_cpu;
941#endif
Denys Vlasenkob410d4a2009-09-19 22:29:42 +0200942 }
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000943#if ENABLE_FEATURE_TOPMEM
Denys Vlasenkob410d4a2009-09-19 22:29:42 +0200944 else { /* TOPMEM */
Alexander Shishkin0834a6d2010-08-28 23:20:34 +0200945 if (!(p->smaps.mapped_ro | p->smaps.mapped_rw))
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000946 continue; /* kernel threads are ignored */
947 n = ntop;
Denis Vlasenkodeeed592008-07-08 05:14:36 +0000948 /* No bug here - top and topmem are the same */
Denis Vlasenko27842282008-08-04 13:20:36 +0000949 top = xrealloc_vector(topmem, 6, ntop++);
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000950 strcpy(topmem[n].comm, p->comm);
951 topmem[n].pid = p->pid;
Alexander Shishkin0834a6d2010-08-28 23:20:34 +0200952 topmem[n].vsz = p->smaps.mapped_rw + p->smaps.mapped_ro;
953 topmem[n].vszrw = p->smaps.mapped_rw;
954 topmem[n].rss_sh = p->smaps.shared_clean + p->smaps.shared_dirty;
955 topmem[n].rss = p->smaps.private_clean + p->smaps.private_dirty + topmem[n].rss_sh;
956 topmem[n].dirty = p->smaps.private_dirty + p->smaps.shared_dirty;
957 topmem[n].dirty_sh = p->smaps.shared_dirty;
958 topmem[n].stack = p->smaps.stack;
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000959 }
Denys Vlasenkob410d4a2009-09-19 22:29:42 +0200960#endif
Denis Vlasenkocf7cf622008-03-19 19:38:46 +0000961 } /* end of "while we read /proc" */
Eric Andersen44608e92002-10-22 12:21:15 +0000962 if (ntop == 0) {
Denis Vlasenkocf7cf622008-03-19 19:38:46 +0000963 bb_error_msg("no process info in /proc");
964 break;
Rob Landleyb2804552006-02-13 22:04:27 +0000965 }
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000966
Denys Vlasenkob410d4a2009-09-19 22:29:42 +0200967 if (scan_mask != TOPMEM_MASK) {
Denis Vlasenkofa076802006-11-05 00:38:51 +0000968#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000969 if (!prev_hist_count) {
970 do_stats();
971 usleep(100000);
972 clearmems();
973 continue;
974 }
Eric Andersen08a72202002-09-30 20:52:10 +0000975 do_stats();
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000976 /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000977 qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
Eric Andersen08a72202002-09-30 20:52:10 +0000978#else
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000979 qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
Denys Vlasenko00528822009-09-11 23:26:42 +0200980#endif
Denis Vlasenkoe96dcb42008-04-17 18:04:38 +0000981 }
982#if ENABLE_FEATURE_TOPMEM
983 else { /* TOPMEM */
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000984 qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
985 }
Denis Vlasenkoe96dcb42008-04-17 18:04:38 +0000986#endif
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000987 lines_rem = lines;
988 if (OPT_BATCH_MODE) {
989 lines_rem = INT_MAX;
Eric Andersen08a72202002-09-30 20:52:10 +0000990 }
Denys Vlasenkob410d4a2009-09-19 22:29:42 +0200991 if (scan_mask != TOPMEM_MASK)
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000992 display_process_list(lines_rem, col);
Denis Vlasenkoe96dcb42008-04-17 18:04:38 +0000993#if ENABLE_FEATURE_TOPMEM
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +0000994 else
Denis Vlasenko17e7f042008-09-25 10:48:06 +0000995 display_topmem_process_list(lines_rem, col);
Denis Vlasenkoe96dcb42008-04-17 18:04:38 +0000996#endif
Denis Vlasenko8bdba4d2007-08-29 18:18:08 +0000997 clearmems();
998 if (iterations >= 0 && !--iterations)
999 break;
1000#if !ENABLE_FEATURE_USE_TERMIOS
1001 sleep(interval);
1002#else
Denis Vlasenkocf7cf622008-03-19 19:38:46 +00001003 if (option_mask32 & (OPT_b|OPT_EOF))
1004 /* batch mode, or EOF on stdin ("top </dev/null") */
1005 sleep(interval);
1006 else if (safe_poll(pfd, 1, interval * 1000) > 0) {
Bernhard Reutner-Fischer5e25ddb2008-05-19 09:48:17 +00001007 if (safe_read(STDIN_FILENO, &c, 1) != 1) { /* error/EOF? */
Denis Vlasenkocf7cf622008-03-19 19:38:46 +00001008 option_mask32 |= OPT_EOF;
1009 continue;
1010 }
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +00001011 if (c == initial_settings.c_cc[VINTR])
"Vladimir N. Oleynik"c218a292006-02-15 17:15:56 +00001012 break;
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +00001013 c |= 0x20; /* lowercase */
1014 if (c == 'q')
1015 break;
1016 if (c == 'n') {
Denis Vlasenko5e34ff22009-04-21 11:09:40 +00001017 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
Denis Vlasenko8bdba4d2007-08-29 18:18:08 +00001018 sort_function[0] = pid_sort;
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +00001019 }
1020 if (c == 'm') {
Denis Vlasenko5e34ff22009-04-21 11:09:40 +00001021 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
Eric Andersen08a72202002-09-30 20:52:10 +00001022 sort_function[0] = mem_sort;
Denys Vlasenko00528822009-09-11 23:26:42 +02001023# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Eric Andersen08a72202002-09-30 20:52:10 +00001024 sort_function[1] = pcpu_sort;
1025 sort_function[2] = time_sort;
Denys Vlasenko00528822009-09-11 23:26:42 +02001026# endif
Eric Andersen08a72202002-09-30 20:52:10 +00001027 }
Denys Vlasenkod75295c2009-09-21 23:58:43 +02001028# if ENABLE_FEATURE_SHOW_THREADS
Denys Vlasenkob410d4a2009-09-19 22:29:42 +02001029 if (c == 'h'
1030 IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
1031 ) {
1032 scan_mask ^= PSSCAN_TASKS;
1033 }
Denys Vlasenkod75295c2009-09-21 23:58:43 +02001034# endif
Denys Vlasenko00528822009-09-11 23:26:42 +02001035# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +00001036 if (c == 'p') {
Denis Vlasenko5e34ff22009-04-21 11:09:40 +00001037 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
Eric Andersen08a72202002-09-30 20:52:10 +00001038 sort_function[0] = pcpu_sort;
1039 sort_function[1] = mem_sort;
1040 sort_function[2] = time_sort;
1041 }
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +00001042 if (c == 't') {
Denis Vlasenko5e34ff22009-04-21 11:09:40 +00001043 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
Eric Andersen08a72202002-09-30 20:52:10 +00001044 sort_function[0] = time_sort;
1045 sort_function[1] = mem_sort;
1046 sort_function[2] = pcpu_sort;
1047 }
Denys Vlasenko00528822009-09-11 23:26:42 +02001048# if ENABLE_FEATURE_TOPMEM
Denis Vlasenkoff6e8e22007-09-08 16:51:19 +00001049 if (c == 's') {
1050 scan_mask = TOPMEM_MASK;
1051 free(prev_hist);
1052 prev_hist = NULL;
1053 prev_hist_count = 0;
1054 sort_field = (sort_field + 1) % NUM_SORT_FIELD;
1055 }
1056 if (c == 'r')
1057 inverted ^= 1;
Denys Vlasenko00528822009-09-11 23:26:42 +02001058# endif
1059# if ENABLE_FEATURE_TOP_SMP_CPU
Denis Vlasenko35840ab2008-09-25 11:11:37 +00001060 /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
1061 if (c == 'c' || c == '1') {
Denis Vlasenko17e7f042008-09-25 10:48:06 +00001062 /* User wants to toggle per cpu <> aggregate */
1063 if (smp_cpu_info) {
1064 free(cpu_prev_jif);
1065 free(cpu_jif);
Denis Vlasenko35840ab2008-09-25 11:11:37 +00001066 cpu_jif = &cur_jif;
Denis Vlasenko17e7f042008-09-25 10:48:06 +00001067 cpu_prev_jif = &prev_jif;
1068 } else {
1069 /* Prepare for xrealloc() */
1070 cpu_jif = cpu_prev_jif = NULL;
1071 }
1072 num_cpus = 0;
1073 smp_cpu_info = !smp_cpu_info;
1074 get_jiffy_counts();
1075 }
Denys Vlasenko00528822009-09-11 23:26:42 +02001076# endif
1077# endif
Eric Andersen08a72202002-09-30 20:52:10 +00001078 }
Denis Vlasenkofa076802006-11-05 00:38:51 +00001079#endif /* FEATURE_USE_TERMIOS */
Denis Vlasenkocf7cf622008-03-19 19:38:46 +00001080 } /* end of "while (1)" */
1081
Denis Vlasenko4daad902007-09-27 10:20:47 +00001082 bb_putchar('\n');
Paul Fox275b9292008-03-20 16:05:02 +00001083#if ENABLE_FEATURE_USE_TERMIOS
Denis Vlasenkocf7cf622008-03-19 19:38:46 +00001084 reset_term();
Paul Fox275b9292008-03-20 16:05:02 +00001085#endif
Eric Andersen420b2082002-09-17 22:14:58 +00001086 return EXIT_SUCCESS;
1087}