diff options
Diffstat (limited to 'procps/top.c')
| -rw-r--r-- | procps/top.c | 130 |
1 files changed, 110 insertions, 20 deletions
diff --git a/procps/top.c b/procps/top.c index 15eb624..00cb448 100644 --- a/procps/top.c +++ b/procps/top.c @@ -50,6 +50,60 @@ * chroot . ./top -bn1 >top1.out */ +//config:config TOP +//config: bool "top" +//config: default y +//config: help +//config: The top program provides a dynamic real-time view of a running +//config: system. +//config: +//config:config FEATURE_TOP_CPU_USAGE_PERCENTAGE +//config: bool "Show CPU per-process usage percentage" +//config: default y +//config: depends on TOP +//config: help +//config: Make top display CPU usage for each process. +//config: This adds about 2k. +//config: +//config:config FEATURE_TOP_CPU_GLOBAL_PERCENTS +//config: bool "Show CPU global usage percentage" +//config: default y +//config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE +//config: help +//config: Makes top display "CPU: NN% usr NN% sys..." line. +//config: This adds about 0.5k. +//config: +//config:config FEATURE_TOP_SMP_CPU +//config: bool "SMP CPU usage display ('c' key)" +//config: default y +//config: depends on FEATURE_TOP_CPU_GLOBAL_PERCENTS +//config: help +//config: Allow 'c' key to switch between individual/cumulative CPU stats +//config: This adds about 0.5k. +//config: +//config:config FEATURE_TOP_DECIMALS +//config: bool "Show 1/10th of a percent in CPU/mem statistics" +//config: default y +//config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE +//config: help +//config: Show 1/10th of a percent in CPU/mem statistics. +//config: This adds about 0.3k. +//config: +//config:config FEATURE_TOP_SMP_PROCESS +//config: bool "Show CPU process runs on ('j' field)" +//config: default y +//config: depends on TOP +//config: help +//config: Show CPU where process was last found running on. +//config: This is the 'j' field. +//config: +//config:config FEATURE_TOPMEM +//config: bool "Topmem command ('s' key)" +//config: default y +//config: depends on TOP +//config: help +//config: Enable 's' in top (gives lots of memory info). + #include "libbb.h" @@ -101,6 +155,8 @@ struct globals { #endif #if ENABLE_FEATURE_USE_TERMIOS struct termios initial_settings; + unsigned lines; /* screen height */ + int scroll_ofs; #endif #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE cmp_funcp sort_function[1]; @@ -118,6 +174,9 @@ struct globals { jiffy_counts_t *cpu_jif, *cpu_prev_jif; int num_cpus; #endif +#if ENABLE_FEATURE_USE_TERMIOS + char kbd_input[KEYCODE_BUFFER_SIZE]; +#endif char line_buf[80]; }; //FIX_ALIASING; - large code growth enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) }; @@ -602,9 +661,9 @@ static NOINLINE void display_process_list(int lines_rem, int scr_width) /* Ok, all preliminary data is ready, go through the list */ scr_width += 2; /* account for leading '\n' and trailing NUL */ - if (lines_rem > ntop) - lines_rem = ntop; - s = top; + if (lines_rem > ntop - G.scroll_ofs) + lines_rem = ntop - G.scroll_ofs; + s = top + G.scroll_ofs; while (--lines_rem >= 0) { unsigned col; CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift); @@ -649,7 +708,6 @@ static void clearmems(void) clear_username_cache(); free(top); top = NULL; - ntop = 0; } #if ENABLE_FEATURE_USE_TERMIOS @@ -793,7 +851,7 @@ static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width) { #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK" #define MIN_WIDTH sizeof(HDR_STR) - const topmem_status_t *s = topmem; + const topmem_status_t *s = topmem + G.scroll_ofs; display_topmem_header(scr_width, &lines_rem); strcpy(line_buf, HDR_STR " COMMAND"); @@ -801,8 +859,8 @@ static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width) printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf); lines_rem--; - if (lines_rem > ntop) - lines_rem = ntop; + if (lines_rem > ntop - G.scroll_ofs) + lines_rem = ntop - G.scroll_ofs; while (--lines_rem >= 0) { /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */ ulltoa6_and_space(s->pid , &line_buf[0*6]); @@ -856,26 +914,57 @@ enum { #if ENABLE_FEATURE_USE_TERMIOS static unsigned handle_input(unsigned scan_mask, unsigned interval) { - unsigned char c; struct pollfd pfd[1]; pfd[0].fd = 0; pfd[0].events = POLLIN; while (1) { - if (safe_poll(pfd, 1, interval * 1000) <= 0) - return scan_mask; - interval = 0; + int32_t c; - if (safe_read(STDIN_FILENO, &c, 1) != 1) { /* error/EOF? */ + c = read_key(STDIN_FILENO, G.kbd_input, interval * 1000); + if (c == -1 && errno != EAGAIN) { + /* error/EOF */ option_mask32 |= OPT_EOF; - return scan_mask; + break; } + interval = 0; if (c == initial_settings.c_cc[VINTR]) return EXIT_MASK; if (c == initial_settings.c_cc[VEOF]) return EXIT_MASK; + + if (c == KEYCODE_UP) { + G.scroll_ofs--; + goto normalize_ofs; + } + if (c == KEYCODE_DOWN) { + G.scroll_ofs++; + goto normalize_ofs; + } + if (c == KEYCODE_HOME) { + G.scroll_ofs = 0; + break; + } + if (c == KEYCODE_END) { + G.scroll_ofs = ntop - G.lines / 2; + goto normalize_ofs; + } + if (c == KEYCODE_PAGEUP) { + G.scroll_ofs -= G.lines / 2; + goto normalize_ofs; + } + if (c == KEYCODE_PAGEDOWN) { + G.scroll_ofs += G.lines / 2; + normalize_ofs: + if (G.scroll_ofs >= ntop) + G.scroll_ofs = ntop - 1; + if (G.scroll_ofs < 0) + G.scroll_ofs = 0; + break; + } + c |= 0x20; /* lowercase */ if (c == 'q') return EXIT_MASK; @@ -1011,7 +1100,7 @@ int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int top_main(int argc UNUSED_PARAM, char **argv) { int iterations; - unsigned lines, col; + unsigned col; unsigned interval; char *str_interval, *str_iterations; unsigned scan_mask = TOP_MASK; @@ -1081,15 +1170,15 @@ int top_main(int argc UNUSED_PARAM, char **argv) procps_status_t *p = NULL; if (OPT_BATCH_MODE) { - lines = INT_MAX; + G.lines = INT_MAX; col = LINE_BUF_SIZE - 2; /* +2 bytes for '\n', NUL */ } else { - lines = 24; /* default */ + G.lines = 24; /* default */ col = 79; #if ENABLE_FEATURE_USE_TERMIOS /* We output to stdout, we need size of stdout (not stdin)! */ - get_terminal_width_height(STDOUT_FILENO, &col, &lines); - if (lines < 5 || col < 10) { + get_terminal_width_height(STDOUT_FILENO, &col, &G.lines); + if (G.lines < 5 || col < 10) { sleep(interval); continue; } @@ -1099,6 +1188,7 @@ int top_main(int argc UNUSED_PARAM, char **argv) } /* read process IDs & status for all the processes */ + ntop = 0; while ((p = procps_scan(p, scan_mask)) != NULL) { int n; #if ENABLE_FEATURE_TOPMEM @@ -1165,10 +1255,10 @@ int top_main(int argc UNUSED_PARAM, char **argv) } #endif if (scan_mask != TOPMEM_MASK) - display_process_list(lines, col); + display_process_list(G.lines, col); #if ENABLE_FEATURE_TOPMEM else - display_topmem_process_list(lines, col); + display_topmem_process_list(G.lines, col); #endif clearmems(); if (iterations >= 0 && !--iterations) |