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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-08-29 18:18:08 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-08-29 18:18:08 +0000
commit8bdba4d011887ce77cd6de93859cacf7adea391e (patch)
treeb67863867ad867ee15f6fb0695b90c615b513e8a /procps
parentfb48f6c982479f21457ef652f8a9ffc14b0a6b75 (diff)
downloadbusybox-8bdba4d011887ce77cd6de93859cacf7adea391e.tar.gz
busybox-8bdba4d011887ce77cd6de93859cacf7adea391e.tar.bz2
top: don't wait before final bailout (try top -b -n1).
top: make code a bit more readable.
Diffstat (limited to 'procps')
-rw-r--r--procps/top.c59
1 files changed, 22 insertions, 37 deletions
diff --git a/procps/top.c b/procps/top.c
index abc7a4363..1b4736454 100644
--- a/procps/top.c
+++ b/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;
}