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-rw-r--r--procps/top.c282
1 files changed, 169 insertions, 113 deletions
diff --git a/procps/top.c b/procps/top.c
index ee6555188..011bbf183 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -92,9 +92,9 @@ enum { SORT_DEPTH = 3 };
92struct globals { 92struct globals {
93 top_status_t *top; 93 top_status_t *top;
94 int ntop; 94 int ntop;
95 smallint inverted;
95#if ENABLE_FEATURE_TOPMEM 96#if ENABLE_FEATURE_TOPMEM
96 smallint sort_field; 97 smallint sort_field;
97 smallint inverted;
98#endif 98#endif
99#if ENABLE_FEATURE_TOP_SMP_CPU 99#if ENABLE_FEATURE_TOP_SMP_CPU
100 smallint smp_cpu_info; /* one/many cpu info lines? */ 100 smallint smp_cpu_info; /* one/many cpu info lines? */
@@ -194,9 +194,9 @@ static int mult_lvl_cmp(void* a, void* b)
194 for (i = 0; i < SORT_DEPTH; i++) { 194 for (i = 0; i < SORT_DEPTH; i++) {
195 cmp_val = (*sort_function[i])(a, b); 195 cmp_val = (*sort_function[i])(a, b);
196 if (cmp_val != 0) 196 if (cmp_val != 0)
197 return cmp_val; 197 break;
198 } 198 }
199 return 0; 199 return inverted ? -cmp_val : cmp_val;
200} 200}
201 201
202static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif) 202static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
@@ -797,7 +797,7 @@ static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
797 797
798 display_topmem_header(scr_width, &lines_rem); 798 display_topmem_header(scr_width, &lines_rem);
799 strcpy(line_buf, HDR_STR " COMMAND"); 799 strcpy(line_buf, HDR_STR " COMMAND");
800 line_buf[5 + sort_field * 6] = '*'; 800 line_buf[11 + sort_field * 6] = "^_"[inverted];
801 printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf); 801 printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
802 lines_rem--; 802 lines_rem--;
803 803
@@ -850,8 +850,114 @@ enum {
850 | PSSCAN_PID 850 | PSSCAN_PID
851 | PSSCAN_SMAPS 851 | PSSCAN_SMAPS
852 | PSSCAN_COMM, 852 | PSSCAN_COMM,
853 EXIT_MASK = (unsigned)-1,
853}; 854};
854 855
856#if ENABLE_FEATURE_USE_TERMIOS
857static unsigned handle_input(unsigned scan_mask, unsigned interval)
858{
859 unsigned char c;
860 struct pollfd pfd[1];
861
862 pfd[0].fd = 0;
863 pfd[0].events = POLLIN;
864
865 while (1) {
866 if (safe_poll(pfd, 1, interval * 1000) <= 0)
867 return scan_mask;
868 interval = 0;
869
870 if (safe_read(STDIN_FILENO, &c, 1) != 1) { /* error/EOF? */
871 option_mask32 |= OPT_EOF;
872 return scan_mask;
873 }
874
875 if (c == initial_settings.c_cc[VINTR])
876 return EXIT_MASK;
877 if (c == initial_settings.c_cc[VEOF])
878 return EXIT_MASK;
879 c |= 0x20; /* lowercase */
880 if (c == 'q')
881 return EXIT_MASK;
882
883 if (c == 'n') {
884 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
885 sort_function[0] = pid_sort;
886 continue;
887 }
888 if (c == 'm') {
889 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
890 sort_function[0] = mem_sort;
891# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
892 sort_function[1] = pcpu_sort;
893 sort_function[2] = time_sort;
894# endif
895 continue;
896 }
897# if ENABLE_FEATURE_SHOW_THREADS
898 if (c == 'h'
899 IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
900 ) {
901 scan_mask ^= PSSCAN_TASKS;
902 continue;
903 }
904# endif
905# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
906 if (c == 'p') {
907 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
908 sort_function[0] = pcpu_sort;
909 sort_function[1] = mem_sort;
910 sort_function[2] = time_sort;
911 continue;
912 }
913 if (c == 't') {
914 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
915 sort_function[0] = time_sort;
916 sort_function[1] = mem_sort;
917 sort_function[2] = pcpu_sort;
918 continue;
919 }
920# if ENABLE_FEATURE_TOPMEM
921 if (c == 's') {
922 scan_mask = TOPMEM_MASK;
923 free(prev_hist);
924 prev_hist = NULL;
925 prev_hist_count = 0;
926 sort_field = (sort_field + 1) % NUM_SORT_FIELD;
927 continue;
928 }
929# endif
930 if (c == 'r') {
931 inverted ^= 1;
932 continue;
933 }
934# if ENABLE_FEATURE_TOP_SMP_CPU
935 /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
936 if (c == 'c' || c == '1') {
937 /* User wants to toggle per cpu <> aggregate */
938 if (smp_cpu_info) {
939 free(cpu_prev_jif);
940 free(cpu_jif);
941 cpu_jif = &cur_jif;
942 cpu_prev_jif = &prev_jif;
943 } else {
944 /* Prepare for xrealloc() */
945 cpu_jif = cpu_prev_jif = NULL;
946 }
947 num_cpus = 0;
948 smp_cpu_info = !smp_cpu_info;
949 get_jiffy_counts();
950 continue;
951 }
952# endif
953# endif
954 break; /* unknown key -> force refresh */
955 }
956
957 return scan_mask;
958}
959#endif
960
855//usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU 961//usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU
856//usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__ 962//usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__
857//usage:#else 963//usage:#else
@@ -871,8 +977,9 @@ enum {
871//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu") 977//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu")
872//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time") 978//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time")
873//usage: IF_FEATURE_TOPMEM( 979//usage: IF_FEATURE_TOPMEM(
874//usage: "\n"" S: show memory, R: reverse memory sort" 980//usage: "\n"" S: show memory"
875//usage: ) 981//usage: )
982//usage: "\n"" R: reverse sort"
876//usage: IF_SHOW_THREADS_OR_TOP_SMP( 983//usage: IF_SHOW_THREADS_OR_TOP_SMP(
877//usage: "\n"" " 984//usage: "\n"" "
878//usage: IF_FEATURE_SHOW_THREADS("H: toggle threads") 985//usage: IF_FEATURE_SHOW_THREADS("H: toggle threads")
@@ -880,23 +987,36 @@ enum {
880//usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP") 987//usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP")
881//usage: ) 988//usage: )
882//usage: "\n"" Q,^C: exit" 989//usage: "\n"" Q,^C: exit"
990//usage: "\n"
991//usage: "\n""Options:"
992//usage: "\n"" -b Batch mode"
993//usage: "\n"" -n N Exit after N iterations"
994//usage: "\n"" -d N Delay between updates"
995//usage: IF_FEATURE_TOPMEM(
996//usage: "\n"" -m Same as 's' key"
997//usage: )
998
999/* Interactive testing:
1000 * echo sss | ./busybox top
1001 * - shows memory screen
1002 * echo sss | ./busybox top -bn1 >mem
1003 * - saves memory screen - the *whole* list, not first NROWS processes!
1004 * echo .m.s.s.s.s.s.s.q | ./busybox top -b >z
1005 * - saves several different screens, and exits
1006 *
1007 * TODO: -i STRING param as a better alternative?
1008 */
883 1009
884int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 1010int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
885int top_main(int argc UNUSED_PARAM, char **argv) 1011int top_main(int argc UNUSED_PARAM, char **argv)
886{ 1012{
887 int iterations; 1013 int iterations;
888 unsigned lines, col; 1014 unsigned lines, col;
889 int lines_rem;
890 unsigned interval; 1015 unsigned interval;
891 char *str_interval, *str_iterations; 1016 char *str_interval, *str_iterations;
892 unsigned scan_mask = TOP_MASK; 1017 unsigned scan_mask = TOP_MASK;
893#if ENABLE_FEATURE_USE_TERMIOS 1018#if ENABLE_FEATURE_USE_TERMIOS
894 struct termios new_settings; 1019 struct termios new_settings;
895 struct pollfd pfd[1];
896 unsigned char c;
897
898 pfd[0].fd = 0;
899 pfd[0].events = POLLIN;
900#endif 1020#endif
901 1021
902 INIT_G(); 1022 INIT_G();
@@ -933,15 +1053,6 @@ int top_main(int argc UNUSED_PARAM, char **argv)
933 1053
934 /* change to /proc */ 1054 /* change to /proc */
935 xchdir("/proc"); 1055 xchdir("/proc");
936#if ENABLE_FEATURE_USE_TERMIOS
937 tcgetattr(0, (void *) &initial_settings);
938 memcpy(&new_settings, &initial_settings, sizeof(new_settings));
939 /* unbuffered input, turn off echo */
940 new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
941
942 bb_signals(BB_FATAL_SIGS, sig_catcher);
943 tcsetattr_stdin_TCSANOW(&new_settings);
944#endif
945 1056
946#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE 1057#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
947 sort_function[0] = pcpu_sort; 1058 sort_function[0] = pcpu_sort;
@@ -951,21 +1062,41 @@ int top_main(int argc UNUSED_PARAM, char **argv)
951 sort_function[0] = mem_sort; 1062 sort_function[0] = mem_sort;
952#endif 1063#endif
953 1064
954 while (1) { 1065#if ENABLE_FEATURE_USE_TERMIOS
1066 tcgetattr(0, (void *) &initial_settings);
1067 memcpy(&new_settings, &initial_settings, sizeof(new_settings));
1068 if (!OPT_BATCH_MODE) {
1069 /* unbuffered input, turn off echo */
1070 new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
1071 tcsetattr_stdin_TCSANOW(&new_settings);
1072 }
1073
1074 bb_signals(BB_FATAL_SIGS, sig_catcher);
1075
1076 /* Eat initial input, if any */
1077 scan_mask = handle_input(scan_mask, 0);
1078#endif
1079
1080 while (scan_mask != EXIT_MASK) {
955 procps_status_t *p = NULL; 1081 procps_status_t *p = NULL;
956 1082
957 lines = 24; /* default */ 1083 if (OPT_BATCH_MODE) {
958 col = 79; 1084 lines = INT_MAX;
1085 col = LINE_BUF_SIZE - 2; /* +2 bytes for '\n', NUL */
1086 } else {
1087 lines = 24; /* default */
1088 col = 79;
959#if ENABLE_FEATURE_USE_TERMIOS 1089#if ENABLE_FEATURE_USE_TERMIOS
960 /* We output to stdout, we need size of stdout (not stdin)! */ 1090 /* We output to stdout, we need size of stdout (not stdin)! */
961 get_terminal_width_height(STDOUT_FILENO, &col, &lines); 1091 get_terminal_width_height(STDOUT_FILENO, &col, &lines);
962 if (lines < 5 || col < 10) { 1092 if (lines < 5 || col < 10) {
963 sleep(interval); 1093 sleep(interval);
964 continue; 1094 continue;
965 } 1095 }
966#endif 1096#endif
967 if (col > LINE_BUF_SIZE-2) /* +2 bytes for '\n', NUL, */ 1097 if (col > LINE_BUF_SIZE - 2)
968 col = LINE_BUF_SIZE-2; 1098 col = LINE_BUF_SIZE - 2;
1099 }
969 1100
970 /* read process IDs & status for all the processes */ 1101 /* read process IDs & status for all the processes */
971 while ((p = procps_scan(p, scan_mask)) != NULL) { 1102 while ((p = procps_scan(p, scan_mask)) != NULL) {
@@ -1033,15 +1164,11 @@ int top_main(int argc UNUSED_PARAM, char **argv)
1033 qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort); 1164 qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
1034 } 1165 }
1035#endif 1166#endif
1036 lines_rem = lines;
1037 if (OPT_BATCH_MODE) {
1038 lines_rem = INT_MAX;
1039 }
1040 if (scan_mask != TOPMEM_MASK) 1167 if (scan_mask != TOPMEM_MASK)
1041 display_process_list(lines_rem, col); 1168 display_process_list(lines, col);
1042#if ENABLE_FEATURE_TOPMEM 1169#if ENABLE_FEATURE_TOPMEM
1043 else 1170 else
1044 display_topmem_process_list(lines_rem, col); 1171 display_topmem_process_list(lines, col);
1045#endif 1172#endif
1046 clearmems(); 1173 clearmems();
1047 if (iterations >= 0 && !--iterations) 1174 if (iterations >= 0 && !--iterations)
@@ -1049,84 +1176,13 @@ int top_main(int argc UNUSED_PARAM, char **argv)
1049#if !ENABLE_FEATURE_USE_TERMIOS 1176#if !ENABLE_FEATURE_USE_TERMIOS
1050 sleep(interval); 1177 sleep(interval);
1051#else 1178#else
1052 if (option_mask32 & (OPT_b|OPT_EOF)) 1179 if (option_mask32 & OPT_EOF)
1053 /* batch mode, or EOF on stdin ("top </dev/null") */ 1180 /* EOF on stdin ("top </dev/null") */
1054 sleep(interval); 1181 sleep(interval);
1055 else if (safe_poll(pfd, 1, interval * 1000) > 0) { 1182 else
1056 if (safe_read(STDIN_FILENO, &c, 1) != 1) { /* error/EOF? */ 1183 scan_mask = handle_input(scan_mask, interval);
1057 option_mask32 |= OPT_EOF;
1058 continue;
1059 }
1060 if (c == initial_settings.c_cc[VINTR])
1061 break;
1062 c |= 0x20; /* lowercase */
1063 if (c == 'q')
1064 break;
1065 if (c == 'n') {
1066 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
1067 sort_function[0] = pid_sort;
1068 }
1069 if (c == 'm') {
1070 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
1071 sort_function[0] = mem_sort;
1072# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1073 sort_function[1] = pcpu_sort;
1074 sort_function[2] = time_sort;
1075# endif
1076 }
1077# if ENABLE_FEATURE_SHOW_THREADS
1078 if (c == 'h'
1079 IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
1080 ) {
1081 scan_mask ^= PSSCAN_TASKS;
1082 }
1083# endif
1084# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1085 if (c == 'p') {
1086 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
1087 sort_function[0] = pcpu_sort;
1088 sort_function[1] = mem_sort;
1089 sort_function[2] = time_sort;
1090 }
1091 if (c == 't') {
1092 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
1093 sort_function[0] = time_sort;
1094 sort_function[1] = mem_sort;
1095 sort_function[2] = pcpu_sort;
1096 }
1097# if ENABLE_FEATURE_TOPMEM
1098 if (c == 's') {
1099 scan_mask = TOPMEM_MASK;
1100 free(prev_hist);
1101 prev_hist = NULL;
1102 prev_hist_count = 0;
1103 sort_field = (sort_field + 1) % NUM_SORT_FIELD;
1104 }
1105 if (c == 'r')
1106 inverted ^= 1;
1107# endif
1108# if ENABLE_FEATURE_TOP_SMP_CPU
1109 /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
1110 if (c == 'c' || c == '1') {
1111 /* User wants to toggle per cpu <> aggregate */
1112 if (smp_cpu_info) {
1113 free(cpu_prev_jif);
1114 free(cpu_jif);
1115 cpu_jif = &cur_jif;
1116 cpu_prev_jif = &prev_jif;
1117 } else {
1118 /* Prepare for xrealloc() */
1119 cpu_jif = cpu_prev_jif = NULL;
1120 }
1121 num_cpus = 0;
1122 smp_cpu_info = !smp_cpu_info;
1123 get_jiffy_counts();
1124 }
1125# endif
1126# endif
1127 }
1128#endif /* FEATURE_USE_TERMIOS */ 1184#endif /* FEATURE_USE_TERMIOS */
1129 } /* end of "while (1)" */ 1185 } /* end of "while (not Q)" */
1130 1186
1131 bb_putchar('\n'); 1187 bb_putchar('\n');
1132#if ENABLE_FEATURE_USE_TERMIOS 1188#if ENABLE_FEATURE_USE_TERMIOS
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-13 12:39:04 +0000