[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * A tiny 'top' utility.
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| 4 | *
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| 5 | * This is written specifically for the linux /proc/<PID>/stat(m)
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| 6 | * files format.
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| 7 |
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| 8 | * This reads the PIDs of all processes and their status and shows
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| 9 | * the status of processes (first ones that fit to screen) at given
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| 10 | * intervals.
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| 11 | *
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| 12 | * NOTES:
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| 13 | * - At startup this changes to /proc, all the reads are then
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| 14 | * relative to that.
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| 15 | *
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| 16 | * (C) Eero Tamminen <oak at welho dot com>
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| 17 | *
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| 18 | * Rewritten by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru>
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| 19 | */
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| 20 |
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| 21 | /* Original code Copyrights */
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| 22 | /*
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| 23 | * Copyright (c) 1992 Branko Lankester
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| 24 | * Copyright (c) 1992 Roger Binns
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| 25 | * Copyright (C) 1994-1996 Charles L. Blake.
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| 26 | * Copyright (C) 1992-1998 Michael K. Johnson
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| 27 | * May be distributed under the conditions of the
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| 28 | * GNU Library General Public License
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| 29 | */
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| 30 |
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[1770] | 31 | #include "libbb.h"
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[821] | 32 |
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| 33 |
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[1770] | 34 | typedef struct top_status_t {
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| 35 | unsigned long vsz;
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| 36 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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| 37 | unsigned long ticks;
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| 38 | unsigned pcpu; /* delta of ticks */
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[821] | 39 | #endif
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[1770] | 40 | unsigned pid, ppid;
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| 41 | unsigned uid;
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| 42 | char state[4];
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| 43 | char comm[COMM_LEN];
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| 44 | } top_status_t;
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[821] | 45 |
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[1770] | 46 | typedef struct jiffy_counts_t {
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| 47 | unsigned long long usr,nic,sys,idle,iowait,irq,softirq,steal;
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| 48 | unsigned long long total;
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| 49 | unsigned long long busy;
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| 50 | } jiffy_counts_t;
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[821] | 51 |
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[1770] | 52 | /* This structure stores some critical information from one frame to
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| 53 | the next. Used for finding deltas. */
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| 54 | typedef struct save_hist {
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| 55 | unsigned long ticks;
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| 56 | unsigned pid;
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| 57 | } save_hist;
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[821] | 58 |
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[1770] | 59 | typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
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[821] | 60 |
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[1770] | 61 | enum { SORT_DEPTH = 3 };
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| 62 |
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| 63 | struct globals {
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| 64 | top_status_t *top;
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| 65 | int ntop;
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| 66 | #if ENABLE_FEATURE_USE_TERMIOS
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| 67 | struct termios initial_settings;
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| 68 | #endif
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| 69 | #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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| 70 | cmp_funcp sort_function;
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| 71 | #else
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| 72 | cmp_funcp sort_function[SORT_DEPTH];
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| 73 | struct save_hist *prev_hist;
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| 74 | int prev_hist_count;
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| 75 | jiffy_counts_t jif, prev_jif;
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| 76 | /* int hist_iterations; */
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| 77 | unsigned total_pcpu;
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| 78 | /* unsigned long total_vsz; */
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| 79 | #endif
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| 80 | };
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| 81 | #define G (*(struct globals*)&bb_common_bufsiz1)
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| 82 | #define top (G.top )
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| 83 | #define ntop (G.ntop )
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| 84 | #if ENABLE_FEATURE_USE_TERMIOS
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| 85 | #define initial_settings (G. initial_settings )
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| 86 | #endif
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| 87 | #define sort_function (G.sort_function )
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| 88 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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| 89 | #define prev_hist (G.prev_hist )
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| 90 | #define prev_hist_count (G.prev_hist_count )
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| 91 | #define jif (G.jif )
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| 92 | #define prev_jif (G.prev_jif )
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| 93 | #define total_pcpu (G.total_pcpu )
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| 94 | #endif
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| 95 |
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| 96 | #define OPT_BATCH_MODE (option_mask32 & 0x4)
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| 97 |
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| 98 |
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| 99 | #if ENABLE_FEATURE_USE_TERMIOS
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| 100 | static int pid_sort(top_status_t *P, top_status_t *Q)
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[821] | 101 | {
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[1770] | 102 | /* Buggy wrt pids with high bit set */
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| 103 | /* (linux pids are in [1..2^15-1]) */
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[821] | 104 | return (Q->pid - P->pid);
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| 105 | }
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| 106 | #endif
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| 107 |
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[1770] | 108 | static int mem_sort(top_status_t *P, top_status_t *Q)
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[821] | 109 | {
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[1770] | 110 | /* We want to avoid unsigned->signed and truncation errors */
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| 111 | if (Q->vsz < P->vsz) return -1;
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| 112 | return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
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[821] | 113 | }
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| 114 |
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| 115 |
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[1770] | 116 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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[821] | 117 |
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[1770] | 118 | static int pcpu_sort(top_status_t *P, top_status_t *Q)
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[821] | 119 | {
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[1770] | 120 | /* Buggy wrt ticks with high bit set */
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| 121 | /* Affects only processes for which ticks overflow */
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| 122 | return (int)Q->pcpu - (int)P->pcpu;
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[821] | 123 | }
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| 124 |
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[1770] | 125 | static int time_sort(top_status_t *P, top_status_t *Q)
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[821] | 126 | {
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[1770] | 127 | /* We want to avoid unsigned->signed and truncation errors */
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| 128 | if (Q->ticks < P->ticks) return -1;
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| 129 | return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
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[821] | 130 | }
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| 131 |
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[1770] | 132 | static int mult_lvl_cmp(void* a, void* b)
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| 133 | {
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[821] | 134 | int i, cmp_val;
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| 135 |
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[1770] | 136 | for (i = 0; i < SORT_DEPTH; i++) {
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[821] | 137 | cmp_val = (*sort_function[i])(a, b);
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| 138 | if (cmp_val != 0)
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| 139 | return cmp_val;
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| 140 | }
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| 141 | return 0;
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| 142 | }
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| 143 |
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| 144 |
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| 145 | static void get_jiffy_counts(void)
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| 146 | {
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[1770] | 147 | FILE* fp = xfopen("stat", "r");
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[821] | 148 | prev_jif = jif;
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| 149 | if (fscanf(fp, "cpu %lld %lld %lld %lld %lld %lld %lld %lld",
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| 150 | &jif.usr,&jif.nic,&jif.sys,&jif.idle,
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| 151 | &jif.iowait,&jif.irq,&jif.softirq,&jif.steal) < 4) {
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[1770] | 152 | bb_error_msg_and_die("failed to read /proc/stat");
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[821] | 153 | }
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| 154 | fclose(fp);
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| 155 | jif.total = jif.usr + jif.nic + jif.sys + jif.idle
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| 156 | + jif.iowait + jif.irq + jif.softirq + jif.steal;
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| 157 | /* procps 2.x does not count iowait as busy time */
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| 158 | jif.busy = jif.total - jif.idle - jif.iowait;
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| 159 | }
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| 160 |
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[1770] | 161 |
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[821] | 162 | static void do_stats(void)
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| 163 | {
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[1770] | 164 | top_status_t *cur;
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| 165 | pid_t pid;
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| 166 | int i, last_i, n;
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[821] | 167 | struct save_hist *new_hist;
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| 168 |
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| 169 | get_jiffy_counts();
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| 170 | total_pcpu = 0;
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[1770] | 171 | /* total_vsz = 0; */
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[821] | 172 | new_hist = xmalloc(sizeof(struct save_hist)*ntop);
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| 173 | /*
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| 174 | * Make a pass through the data to get stats.
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| 175 | */
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| 176 | /* hist_iterations = 0; */
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| 177 | i = 0;
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| 178 | for (n = 0; n < ntop; n++) {
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| 179 | cur = top + n;
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| 180 |
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| 181 | /*
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| 182 | * Calculate time in cur process. Time is sum of user time
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| 183 | * and system time
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| 184 | */
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| 185 | pid = cur->pid;
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[1770] | 186 | new_hist[n].ticks = cur->ticks;
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[821] | 187 | new_hist[n].pid = pid;
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| 188 |
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| 189 | /* find matching entry from previous pass */
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| 190 | cur->pcpu = 0;
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| 191 | /* do not start at index 0, continue at last used one
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| 192 | * (brought hist_iterations from ~14000 down to 172) */
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| 193 | last_i = i;
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| 194 | if (prev_hist_count) do {
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| 195 | if (prev_hist[i].pid == pid) {
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[1770] | 196 | cur->pcpu = cur->ticks - prev_hist[i].ticks;
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| 197 | total_pcpu += cur->pcpu;
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[821] | 198 | break;
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| 199 | }
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| 200 | i = (i+1) % prev_hist_count;
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| 201 | /* hist_iterations++; */
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| 202 | } while (i != last_i);
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[1770] | 203 | /* total_vsz += cur->vsz; */
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[821] | 204 | }
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| 205 |
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| 206 | /*
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| 207 | * Save cur frame's information.
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| 208 | */
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| 209 | free(prev_hist);
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| 210 | prev_hist = new_hist;
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| 211 | prev_hist_count = ntop;
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| 212 | }
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[1770] | 213 | #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
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[821] | 214 |
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[1770] | 215 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
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| 216 | /* formats 7 char string (8 with terminating NUL) */
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| 217 | static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
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| 218 | {
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| 219 | unsigned t;
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| 220 | if (value >= total) { /* 100% ? */
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| 221 | strcpy(pbuf, " 100% ");
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| 222 | return pbuf;
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| 223 | }
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| 224 | /* else generate " [N/space]N.N% " string */
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| 225 | value = 1000 * value / total;
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| 226 | t = value / 100;
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| 227 | value = value % 100;
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| 228 | pbuf[0] = ' ';
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| 229 | pbuf[1] = t ? t + '0' : ' ';
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| 230 | pbuf[2] = '0' + (value / 10);
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| 231 | pbuf[3] = '.';
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| 232 | pbuf[4] = '0' + (value % 10);
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| 233 | pbuf[5] = '%';
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| 234 | pbuf[6] = ' ';
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| 235 | pbuf[7] = '\0';
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| 236 | return pbuf;
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| 237 | }
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| 238 | #endif
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| 239 |
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[821] | 240 | /* display generic info (meminfo / loadavg) */
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| 241 | static unsigned long display_generic(int scr_width)
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| 242 | {
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| 243 | FILE *fp;
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| 244 | char buf[80];
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| 245 | char scrbuf[80];
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| 246 | unsigned long total, used, mfree, shared, buffers, cached;
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[1770] | 247 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
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| 248 | unsigned total_diff;
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| 249 | #endif
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[821] | 250 |
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| 251 | /* read memory info */
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[1770] | 252 | fp = xfopen("meminfo", "r");
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[821] | 253 |
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| 254 | /*
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| 255 | * Old kernels (such as 2.4.x) had a nice summary of memory info that
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| 256 | * we could parse, however this is gone entirely in 2.6. Try parsing
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| 257 | * the old way first, and if that fails, parse each field manually.
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| 258 | *
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| 259 | * First, we read in the first line. Old kernels will have bogus
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| 260 | * strings we don't care about, whereas new kernels will start right
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| 261 | * out with MemTotal:
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| 262 | * -- PFM.
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| 263 | */
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| 264 | if (fscanf(fp, "MemTotal: %lu %s\n", &total, buf) != 2) {
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| 265 | fgets(buf, sizeof(buf), fp); /* skip first line */
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| 266 |
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| 267 | fscanf(fp, "Mem: %lu %lu %lu %lu %lu %lu",
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[1770] | 268 | &total, &used, &mfree, &shared, &buffers, &cached);
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| 269 | /* convert to kilobytes */
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| 270 | used /= 1024;
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| 271 | mfree /= 1024;
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| 272 | shared /= 1024;
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| 273 | buffers /= 1024;
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| 274 | cached /= 1024;
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| 275 | total /= 1024;
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[821] | 276 | } else {
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| 277 | /*
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| 278 | * Revert to manual parsing, which incidentally already has the
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| 279 | * sizes in kilobytes. This should be safe for both 2.4 and
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| 280 | * 2.6.
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| 281 | */
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| 282 |
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| 283 | fscanf(fp, "MemFree: %lu %s\n", &mfree, buf);
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| 284 |
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| 285 | /*
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| 286 | * MemShared: is no longer present in 2.6. Report this as 0,
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| 287 | * to maintain consistent behavior with normal procps.
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| 288 | */
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| 289 | if (fscanf(fp, "MemShared: %lu %s\n", &shared, buf) != 2)
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| 290 | shared = 0;
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| 291 |
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| 292 | fscanf(fp, "Buffers: %lu %s\n", &buffers, buf);
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| 293 | fscanf(fp, "Cached: %lu %s\n", &cached, buf);
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| 294 |
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| 295 | used = total - mfree;
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| 296 | }
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| 297 | fclose(fp);
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| 298 |
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[1770] | 299 | /* output memory info */
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[821] | 300 | if (scr_width > sizeof(scrbuf))
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| 301 | scr_width = sizeof(scrbuf);
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| 302 | snprintf(scrbuf, scr_width,
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[1770] | 303 | "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
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[821] | 304 | used, mfree, shared, buffers, cached);
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[1770] | 305 | /* clear screen & go to top */
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| 306 | printf(OPT_BATCH_MODE ? "%s\n" : "\e[H\e[J%s\n", scrbuf);
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[821] | 307 |
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[1770] | 308 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
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| 309 | /*
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| 310 | * xxx% = (jif.xxx - prev_jif.xxx) / (jif.total - prev_jif.total) * 100%
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| 311 | */
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| 312 | /* using (unsigned) casts to make operations cheaper */
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| 313 | total_diff = ((unsigned)(jif.total - prev_jif.total) ? : 1);
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| 314 | #if ENABLE_FEATURE_TOP_DECIMALS
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| 315 | /* Generated code is approx +0.3k */
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| 316 | #define CALC_STAT(xxx) char xxx[8]
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| 317 | #define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(jif.xxx - prev_jif.xxx), total_diff)
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| 318 | #define FMT "%s"
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| 319 | #else
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| 320 | #define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(jif.xxx - prev_jif.xxx) / total_diff
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| 321 | #define SHOW_STAT(xxx) xxx
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| 322 | #define FMT "%4u%% "
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| 323 | #endif
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| 324 | { /* need block: CALC_STAT are declarations */
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| 325 | CALC_STAT(usr);
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| 326 | CALC_STAT(sys);
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| 327 | CALC_STAT(nic);
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| 328 | CALC_STAT(idle);
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| 329 | CALC_STAT(iowait);
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| 330 | CALC_STAT(irq);
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| 331 | CALC_STAT(softirq);
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| 332 | //CALC_STAT(steal);
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| 333 |
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| 334 | snprintf(scrbuf, scr_width,
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| 335 | /* Barely fits in 79 chars when in "decimals" mode. */
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| 336 | "CPU:"FMT"usr"FMT"sys"FMT"nice"FMT"idle"FMT"io"FMT"irq"FMT"softirq",
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| 337 | SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
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| 338 | SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
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| 339 | //, SHOW_STAT(steal) - what is this 'steal' thing?
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| 340 | // I doubt anyone wants to know it
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| 341 | );
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| 342 | }
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| 343 | puts(scrbuf);
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| 344 | #undef SHOW_STAT
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| 345 | #undef CALC_STAT
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| 346 | #undef FMT
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| 347 | #endif
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| 348 |
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| 349 | /* read load average as a string */
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| 350 | buf[0] = '\0';
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| 351 | open_read_close("loadavg", buf, sizeof("N.NN N.NN N.NN")-1);
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| 352 | buf[sizeof("N.NN N.NN N.NN")-1] = '\0';
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| 353 | snprintf(scrbuf, scr_width, "Load average: %s", buf);
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| 354 | puts(scrbuf);
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| 355 |
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[821] | 356 | return total;
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| 357 | }
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| 358 |
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| 359 | /* display process statuses */
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| 360 | static void display_status(int count, int scr_width)
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| 361 | {
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| 362 | enum {
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[1770] | 363 | BITS_PER_INT = sizeof(int)*8
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[821] | 364 | };
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| 365 |
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[1770] | 366 | top_status_t *s = top;
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| 367 | char vsz_str_buf[8];
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| 368 | unsigned long total_memory = display_generic(scr_width); /* or use total_vsz? */
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| 369 | /* xxx_shift and xxx_scale variables allow us to replace
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| 370 | * expensive divides with multiply and shift */
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| 371 | unsigned pmem_shift, pmem_scale, pmem_half;
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| 372 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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| 373 | unsigned pcpu_shift, pcpu_scale, pcpu_half;
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| 374 | unsigned busy_jifs;
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[821] | 375 |
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| 376 | /* what info of the processes is shown */
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[1770] | 377 | printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width,
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| 378 | " PID PPID USER STAT VSZ %MEM %CPU COMMAND");
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[821] | 379 | #define MIN_WIDTH \
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[1770] | 380 | sizeof( " PID PPID USER STAT VSZ %MEM %CPU C")
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[821] | 381 | #else
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[1770] | 382 |
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| 383 | /* !CPU_USAGE_PERCENTAGE */
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| 384 | printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width,
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| 385 | " PID PPID USER STAT VSZ %MEM COMMAND");
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[821] | 386 | #define MIN_WIDTH \
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[1770] | 387 | sizeof( " PID PPID USER STAT VSZ %MEM C")
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[821] | 388 | #endif
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| 389 |
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[1770] | 390 | #if ENABLE_FEATURE_TOP_DECIMALS
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| 391 | #define UPSCALE 1000
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| 392 | #define CALC_STAT(name, val) div_t name = div((val), 10)
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| 393 | #define SHOW_STAT(name) name.quot, '0'+name.rem
|
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| 394 | #define FMT "%3u.%c"
|
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| 395 | #else
|
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| 396 | #define UPSCALE 100
|
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| 397 | #define CALC_STAT(name, val) unsigned name = (val)
|
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| 398 | #define SHOW_STAT(name) name
|
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| 399 | #define FMT "%4u%%"
|
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| 400 | #endif
|
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[821] | 401 | /*
|
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[1770] | 402 | * MEM% = s->vsz/MemTotal
|
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[821] | 403 | */
|
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[1770] | 404 | pmem_shift = BITS_PER_INT-11;
|
---|
| 405 | pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
|
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| 406 | /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
|
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[821] | 407 | while (pmem_scale >= 512) {
|
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| 408 | pmem_scale /= 4;
|
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| 409 | pmem_shift -= 2;
|
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| 410 | }
|
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[1770] | 411 | pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
|
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| 412 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
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| 413 | busy_jifs = jif.busy - prev_jif.busy;
|
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| 414 | /* This happens if there were lots of short-lived processes
|
---|
| 415 | * between two top updates (e.g. compilation) */
|
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| 416 | if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
|
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| 417 |
|
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[821] | 418 | /*
|
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| 419 | * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
|
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| 420 | * (pcpu is delta of sys+user time between samples)
|
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| 421 | */
|
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| 422 | /* (jif.xxx - prev_jif.xxx) and s->pcpu are
|
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| 423 | * in 0..~64000 range (HZ*update_interval).
|
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| 424 | * we assume that unsigned is at least 32-bit.
|
---|
| 425 | */
|
---|
| 426 | pcpu_shift = 6;
|
---|
[1770] | 427 | pcpu_scale = (UPSCALE*64*(uint16_t)busy_jifs ? : 1);
|
---|
| 428 | while (pcpu_scale < (1U<<(BITS_PER_INT-2))) {
|
---|
[821] | 429 | pcpu_scale *= 4;
|
---|
| 430 | pcpu_shift += 2;
|
---|
| 431 | }
|
---|
| 432 | pcpu_scale /= ( (uint16_t)(jif.total-prev_jif.total)*total_pcpu ? : 1);
|
---|
| 433 | /* we want (s->pcpu * pcpu_scale) to never overflow */
|
---|
| 434 | while (pcpu_scale >= 1024) {
|
---|
| 435 | pcpu_scale /= 4;
|
---|
| 436 | pcpu_shift -= 2;
|
---|
| 437 | }
|
---|
[1770] | 438 | pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
|
---|
[821] | 439 | /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
|
---|
| 440 | #endif
|
---|
| 441 |
|
---|
[1770] | 442 | /* Ok, all prelim data is ready, go thru the list */
|
---|
| 443 | while (count-- > 0) {
|
---|
| 444 | int col = scr_width;
|
---|
| 445 | CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
|
---|
| 446 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 447 | CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
|
---|
| 448 | #endif
|
---|
[821] | 449 |
|
---|
[1770] | 450 | if (s->vsz >= 100*1024)
|
---|
| 451 | sprintf(vsz_str_buf, "%6ldM", s->vsz/1024);
|
---|
[821] | 452 | else
|
---|
[1770] | 453 | sprintf(vsz_str_buf, "%7ld", s->vsz);
|
---|
| 454 | // PID PPID USER STAT VSZ %MEM [%CPU] COMMAND
|
---|
| 455 | col -= printf("\n" "%5u%6u %-8.8s %s%s" FMT
|
---|
| 456 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 457 | FMT
|
---|
| 458 | #endif
|
---|
| 459 | " ",
|
---|
| 460 | s->pid, s->ppid, get_cached_username(s->uid),
|
---|
| 461 | s->state, vsz_str_buf,
|
---|
| 462 | SHOW_STAT(pmem)
|
---|
| 463 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 464 | , SHOW_STAT(pcpu)
|
---|
| 465 | #endif
|
---|
| 466 | );
|
---|
| 467 | if (col > 0) {
|
---|
| 468 | char buf[col + 1];
|
---|
| 469 | read_cmdline(buf, col, s->pid, s->comm);
|
---|
| 470 | fputs(buf, stdout);
|
---|
| 471 | }
|
---|
[821] | 472 | /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
|
---|
| 473 | jif.busy - prev_jif.busy, jif.total - prev_jif.total); */
|
---|
| 474 | s++;
|
---|
| 475 | }
|
---|
| 476 | /* printf(" %d", hist_iterations); */
|
---|
[1770] | 477 | putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
---|
[821] | 478 | fflush(stdout);
|
---|
| 479 | }
|
---|
[1770] | 480 | #undef UPSCALE
|
---|
| 481 | #undef SHOW_STAT
|
---|
| 482 | #undef CALC_STAT
|
---|
| 483 | #undef FMT
|
---|
[821] | 484 |
|
---|
[1770] | 485 |
|
---|
[821] | 486 | static void clearmems(void)
|
---|
| 487 | {
|
---|
[1770] | 488 | clear_username_cache();
|
---|
[821] | 489 | free(top);
|
---|
| 490 | top = 0;
|
---|
| 491 | ntop = 0;
|
---|
| 492 | }
|
---|
| 493 |
|
---|
[1770] | 494 |
|
---|
| 495 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
[821] | 496 | #include <termios.h>
|
---|
| 497 | #include <signal.h>
|
---|
| 498 |
|
---|
| 499 | static void reset_term(void)
|
---|
| 500 | {
|
---|
| 501 | tcsetattr(0, TCSANOW, (void *) &initial_settings);
|
---|
[1770] | 502 | #if ENABLE_FEATURE_CLEAN_UP
|
---|
[821] | 503 | clearmems();
|
---|
[1770] | 504 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[821] | 505 | free(prev_hist);
|
---|
| 506 | #endif
|
---|
[1770] | 507 | #endif /* FEATURE_CLEAN_UP */
|
---|
[821] | 508 | }
|
---|
| 509 |
|
---|
| 510 | static void sig_catcher(int sig ATTRIBUTE_UNUSED)
|
---|
| 511 | {
|
---|
| 512 | reset_term();
|
---|
| 513 | exit(1);
|
---|
| 514 | }
|
---|
[1770] | 515 | #endif /* FEATURE_USE_TERMIOS */
|
---|
[821] | 516 |
|
---|
| 517 |
|
---|
[1770] | 518 | int top_main(int argc, char **argv);
|
---|
[821] | 519 | int top_main(int argc, char **argv)
|
---|
| 520 | {
|
---|
[1770] | 521 | int count, lines, col;
|
---|
| 522 | unsigned interval = 5; /* default update rate is 5 seconds */
|
---|
| 523 | unsigned iterations = UINT_MAX; /* 2^32 iterations by default :) */
|
---|
| 524 | char *sinterval, *siterations;
|
---|
| 525 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
[821] | 526 | struct termios new_settings;
|
---|
| 527 | struct timeval tv;
|
---|
| 528 | fd_set readfds;
|
---|
| 529 | unsigned char c;
|
---|
[1770] | 530 | #endif /* FEATURE_USE_TERMIOS */
|
---|
[821] | 531 |
|
---|
[1770] | 532 | interval = 5;
|
---|
| 533 |
|
---|
[821] | 534 | /* do normal option parsing */
|
---|
[1770] | 535 | opt_complementary = "-";
|
---|
| 536 | getopt32(argv, "d:n:b", &sinterval, &siterations);
|
---|
| 537 | if (option_mask32 & 0x1) interval = xatou(sinterval); // -d
|
---|
| 538 | if (option_mask32 & 0x2) iterations = xatou(siterations); // -n
|
---|
| 539 | //if (option_mask32 & 0x4) // -b
|
---|
[821] | 540 |
|
---|
| 541 | /* change to /proc */
|
---|
[1770] | 542 | xchdir("/proc");
|
---|
| 543 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
[821] | 544 | tcgetattr(0, (void *) &initial_settings);
|
---|
| 545 | memcpy(&new_settings, &initial_settings, sizeof(struct termios));
|
---|
[1770] | 546 | /* unbuffered input, turn off echo */
|
---|
| 547 | new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
|
---|
[821] | 548 |
|
---|
| 549 | signal(SIGTERM, sig_catcher);
|
---|
| 550 | signal(SIGINT, sig_catcher);
|
---|
| 551 | tcsetattr(0, TCSANOW, (void *) &new_settings);
|
---|
| 552 | atexit(reset_term);
|
---|
[1770] | 553 | #endif /* FEATURE_USE_TERMIOS */
|
---|
[821] | 554 |
|
---|
[1770] | 555 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[821] | 556 | sort_function[0] = pcpu_sort;
|
---|
| 557 | sort_function[1] = mem_sort;
|
---|
| 558 | sort_function[2] = time_sort;
|
---|
| 559 | #else
|
---|
| 560 | sort_function = mem_sort;
|
---|
[1770] | 561 | #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
|
---|
[821] | 562 |
|
---|
| 563 | while (1) {
|
---|
[1770] | 564 | procps_status_t *p = NULL;
|
---|
[821] | 565 |
|
---|
| 566 | /* Default to 25 lines - 5 lines for status */
|
---|
[1770] | 567 | lines = 24 - 3 USE_FEATURE_TOP_CPU_GLOBAL_PERCENTS( - 1);
|
---|
[821] | 568 | col = 79;
|
---|
[1770] | 569 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
[821] | 570 | get_terminal_width_height(0, &col, &lines);
|
---|
| 571 | if (lines < 5 || col < MIN_WIDTH) {
|
---|
| 572 | sleep(interval);
|
---|
| 573 | continue;
|
---|
| 574 | }
|
---|
[1770] | 575 | lines -= 3 USE_FEATURE_TOP_CPU_GLOBAL_PERCENTS( + 1);
|
---|
| 576 | #endif /* FEATURE_USE_TERMIOS */
|
---|
[821] | 577 |
|
---|
| 578 | /* read process IDs & status for all the processes */
|
---|
[1770] | 579 | while ((p = procps_scan(p, 0
|
---|
| 580 | | PSSCAN_PID
|
---|
| 581 | | PSSCAN_PPID
|
---|
| 582 | | PSSCAN_VSZ
|
---|
| 583 | | PSSCAN_STIME
|
---|
| 584 | | PSSCAN_UTIME
|
---|
| 585 | | PSSCAN_STATE
|
---|
| 586 | | PSSCAN_COMM
|
---|
| 587 | | PSSCAN_SID
|
---|
| 588 | | PSSCAN_UIDGID
|
---|
| 589 | ))) {
|
---|
[821] | 590 | int n = ntop;
|
---|
[1770] | 591 | top = xrealloc(top, (++ntop) * sizeof(*top));
|
---|
| 592 | top[n].pid = p->pid;
|
---|
| 593 | top[n].ppid = p->ppid;
|
---|
| 594 | top[n].vsz = p->vsz;
|
---|
| 595 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 596 | top[n].ticks = p->stime + p->utime;
|
---|
| 597 | #endif
|
---|
| 598 | top[n].uid = p->uid;
|
---|
| 599 | strcpy(top[n].state, p->state);
|
---|
| 600 | strcpy(top[n].comm, p->comm);
|
---|
[821] | 601 | }
|
---|
| 602 | if (ntop == 0) {
|
---|
[1770] | 603 | bb_error_msg_and_die("no process info in /proc");
|
---|
[821] | 604 | }
|
---|
[1770] | 605 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[821] | 606 | if (!prev_hist_count) {
|
---|
| 607 | do_stats();
|
---|
| 608 | sleep(1);
|
---|
| 609 | clearmems();
|
---|
| 610 | continue;
|
---|
| 611 | }
|
---|
| 612 | do_stats();
|
---|
[1770] | 613 | /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
|
---|
| 614 | qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
|
---|
[821] | 615 | #else
|
---|
[1770] | 616 | qsort(top, ntop, sizeof(top_status_t), (void*)sort_function);
|
---|
| 617 | #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
|
---|
| 618 | count = lines;
|
---|
| 619 | if (OPT_BATCH_MODE || count > ntop) {
|
---|
| 620 | count = ntop;
|
---|
[821] | 621 | }
|
---|
| 622 | /* show status for each of the processes */
|
---|
[1770] | 623 | display_status(count, col);
|
---|
| 624 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
[821] | 625 | tv.tv_sec = interval;
|
---|
| 626 | tv.tv_usec = 0;
|
---|
| 627 | FD_ZERO(&readfds);
|
---|
| 628 | FD_SET(0, &readfds);
|
---|
| 629 | select(1, &readfds, NULL, NULL, &tv);
|
---|
| 630 | if (FD_ISSET(0, &readfds)) {
|
---|
| 631 | if (read(0, &c, 1) <= 0) { /* signal */
|
---|
| 632 | return EXIT_FAILURE;
|
---|
| 633 | }
|
---|
| 634 | if (c == 'q' || c == initial_settings.c_cc[VINTR])
|
---|
| 635 | break;
|
---|
| 636 | if (c == 'M') {
|
---|
[1770] | 637 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[821] | 638 | sort_function[0] = mem_sort;
|
---|
| 639 | sort_function[1] = pcpu_sort;
|
---|
| 640 | sort_function[2] = time_sort;
|
---|
| 641 | #else
|
---|
| 642 | sort_function = mem_sort;
|
---|
| 643 | #endif
|
---|
| 644 | }
|
---|
[1770] | 645 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[821] | 646 | if (c == 'P') {
|
---|
| 647 | sort_function[0] = pcpu_sort;
|
---|
| 648 | sort_function[1] = mem_sort;
|
---|
| 649 | sort_function[2] = time_sort;
|
---|
| 650 | }
|
---|
| 651 | if (c == 'T') {
|
---|
| 652 | sort_function[0] = time_sort;
|
---|
| 653 | sort_function[1] = mem_sort;
|
---|
| 654 | sort_function[2] = pcpu_sort;
|
---|
| 655 | }
|
---|
| 656 | #endif
|
---|
| 657 | if (c == 'N') {
|
---|
[1770] | 658 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[821] | 659 | sort_function[0] = pid_sort;
|
---|
| 660 | #else
|
---|
| 661 | sort_function = pid_sort;
|
---|
| 662 | #endif
|
---|
| 663 | }
|
---|
| 664 | }
|
---|
[1770] | 665 | if (!--iterations)
|
---|
| 666 | break;
|
---|
[821] | 667 | #else
|
---|
| 668 | sleep(interval);
|
---|
[1770] | 669 | #endif /* FEATURE_USE_TERMIOS */
|
---|
[821] | 670 | clearmems();
|
---|
| 671 | }
|
---|
| 672 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 673 | clearmems();
|
---|
| 674 | putchar('\n');
|
---|
| 675 | return EXIT_SUCCESS;
|
---|
| 676 | }
|
---|