top: don't wait before final bailout (try top -b -n1).
top: make code a bit more readable.
This commit is contained in:
Denis Vlasenko
parent
fb48f6c982
commit
8bdba4d011
59
procps/top.c
59
procps/top.c
@ -67,7 +67,7 @@ struct globals {
|
||||
struct termios initial_settings;
|
||||
#endif
|
||||
#if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
||||
cmp_funcp sort_function;
|
||||
cmp_funcp sort_function[1];
|
||||
#else
|
||||
cmp_funcp sort_function[SORT_DEPTH];
|
||||
struct save_hist *prev_hist;
|
||||
@ -81,17 +81,14 @@ struct globals {
|
||||
#define G (*(struct globals*)&bb_common_bufsiz1)
|
||||
#define top (G.top )
|
||||
#define ntop (G.ntop )
|
||||
#if ENABLE_FEATURE_USE_TERMIOS
|
||||
#define initial_settings (G. initial_settings )
|
||||
#endif
|
||||
#define sort_function (G.sort_function )
|
||||
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
||||
#define prev_hist (G.prev_hist )
|
||||
#define prev_hist_count (G.prev_hist_count )
|
||||
#define jif (G.jif )
|
||||
#define prev_jif (G.prev_jif )
|
||||
#define total_pcpu (G.total_pcpu )
|
||||
#endif
|
||||
|
||||
|
||||
#define OPT_BATCH_MODE (option_mask32 & 0x4)
|
||||
|
||||
@ -356,8 +353,7 @@ static unsigned long display_generic(int scr_width)
|
||||
return total;
|
||||
}
|
||||
|
||||
/* display process statuses */
|
||||
static void display_status(int count, int scr_width)
|
||||
static void display_process_list(int count, int scr_width)
|
||||
{
|
||||
enum {
|
||||
BITS_PER_INT = sizeof(int)*8
|
||||
@ -482,7 +478,6 @@ static void display_status(int count, int scr_width)
|
||||
#undef CALC_STAT
|
||||
#undef FMT
|
||||
|
||||
|
||||
static void clearmems(void)
|
||||
{
|
||||
clear_username_cache();
|
||||
@ -491,7 +486,6 @@ static void clearmems(void)
|
||||
ntop = 0;
|
||||
}
|
||||
|
||||
|
||||
#if ENABLE_FEATURE_USE_TERMIOS
|
||||
#include <termios.h>
|
||||
#include <signal.h>
|
||||
@ -499,12 +493,12 @@ static void clearmems(void)
|
||||
static void reset_term(void)
|
||||
{
|
||||
tcsetattr(0, TCSANOW, (void *) &initial_settings);
|
||||
#if ENABLE_FEATURE_CLEAN_UP
|
||||
clearmems();
|
||||
if (ENABLE_FEATURE_CLEAN_UP) {
|
||||
clearmems();
|
||||
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
||||
free(prev_hist);
|
||||
free(prev_hist);
|
||||
#endif
|
||||
#endif /* FEATURE_CLEAN_UP */
|
||||
}
|
||||
}
|
||||
|
||||
static void sig_catcher(int sig ATTRIBUTE_UNUSED)
|
||||
@ -548,7 +542,7 @@ int top_main(int argc, char **argv)
|
||||
xchdir("/proc");
|
||||
#if ENABLE_FEATURE_USE_TERMIOS
|
||||
tcgetattr(0, (void *) &initial_settings);
|
||||
memcpy(&new_settings, &initial_settings, sizeof(struct termios));
|
||||
memcpy(&new_settings, &initial_settings, sizeof(new_settings));
|
||||
/* unbuffered input, turn off echo */
|
||||
new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
|
||||
|
||||
@ -563,17 +557,18 @@ int top_main(int argc, char **argv)
|
||||
sort_function[1] = mem_sort;
|
||||
sort_function[2] = time_sort;
|
||||
#else
|
||||
sort_function = mem_sort;
|
||||
sort_function[0] = mem_sort;
|
||||
#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
|
||||
|
||||
while (1) {
|
||||
procps_status_t *p = NULL;
|
||||
|
||||
/* Default to 25 lines - 5 lines for status */
|
||||
/* Default */
|
||||
lines = 24 - 3 USE_FEATURE_TOP_CPU_GLOBAL_PERCENTS( - 1);
|
||||
col = 79;
|
||||
#if ENABLE_FEATURE_USE_TERMIOS
|
||||
get_terminal_width_height(0, &col, &lines);
|
||||
/* We wrap horribly if width is too narrow (TODO) */
|
||||
if (lines < 5 || col < MIN_WIDTH) {
|
||||
sleep(interval);
|
||||
continue;
|
||||
@ -618,27 +613,31 @@ int top_main(int argc, char **argv)
|
||||
/* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
|
||||
qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
|
||||
#else
|
||||
qsort(top, ntop, sizeof(top_status_t), (void*)sort_function);
|
||||
qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
|
||||
#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
|
||||
count = lines;
|
||||
if (OPT_BATCH_MODE || count > ntop) {
|
||||
count = ntop;
|
||||
}
|
||||
/* show status for each of the processes */
|
||||
display_status(count, col);
|
||||
#if ENABLE_FEATURE_USE_TERMIOS
|
||||
display_process_list(count, col);
|
||||
clearmems();
|
||||
if (iterations >= 0 && !--iterations)
|
||||
break;
|
||||
#if !ENABLE_FEATURE_USE_TERMIOS
|
||||
sleep(interval);
|
||||
#else
|
||||
if (poll(pfd, 1, interval * 1000) != 0) {
|
||||
if (read(0, &c, 1) != 1) /* signal */
|
||||
break;
|
||||
if (c == 'q' || c == initial_settings.c_cc[VINTR])
|
||||
break;
|
||||
if (c == 'N')
|
||||
sort_function[0] = pid_sort;
|
||||
if (c == 'M') {
|
||||
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
||||
sort_function[0] = mem_sort;
|
||||
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
||||
sort_function[1] = pcpu_sort;
|
||||
sort_function[2] = time_sort;
|
||||
#else
|
||||
sort_function = mem_sort;
|
||||
#endif
|
||||
}
|
||||
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
||||
@ -653,23 +652,9 @@ int top_main(int argc, char **argv)
|
||||
sort_function[2] = pcpu_sort;
|
||||
}
|
||||
#endif
|
||||
if (c == 'N') {
|
||||
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
||||
sort_function[0] = pid_sort;
|
||||
#else
|
||||
sort_function = pid_sort;
|
||||
#endif
|
||||
}
|
||||
}
|
||||
if (iterations >= 0 && !--iterations)
|
||||
break;
|
||||
#else
|
||||
sleep(interval);
|
||||
#endif /* FEATURE_USE_TERMIOS */
|
||||
clearmems();
|
||||
}
|
||||
if (ENABLE_FEATURE_CLEAN_UP)
|
||||
clearmems();
|
||||
putchar('\n');
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user