mirror of
https://git.busybox.net/busybox.git
synced 2024-12-03 02:23:27 +08:00
Cleanups from Denis Vlasenko.
This commit is contained in:
Rob Landley
parent
90632d021c
commit
b2804551a0
@ -13,9 +13,24 @@
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#include <stdlib.h>
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#include <unistd.h>
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#include <asm/page.h>
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#include <fcntl.h>
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#include "libbb.h"
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static int read_to_buf(char *filename, void *buf, int bufsize)
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{
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int fd;
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fd = open(filename, O_RDONLY);
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if(fd < 0)
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return -1;
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bufsize = read(fd, buf, bufsize);
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close(fd);
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return bufsize;
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}
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extern procps_status_t * procps_scan(int save_user_arg0)
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{
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static DIR *dir;
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@ -24,8 +39,8 @@ extern procps_status_t * procps_scan(int save_user_arg0)
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char *name;
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int n;
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char status[32];
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char *status_tail;
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char buf[1024];
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FILE *fp;
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procps_status_t curstatus;
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int pid;
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long tasknice;
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@ -50,18 +65,14 @@ extern procps_status_t * procps_scan(int save_user_arg0)
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pid = atoi(name);
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curstatus.pid = pid;
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sprintf(status, "/proc/%d", pid);
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status_tail = status + sprintf(status, "/proc/%d", pid);
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if(stat(status, &sb))
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continue;
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bb_getpwuid(curstatus.user, sb.st_uid, sizeof(curstatus.user));
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sprintf(status, "/proc/%d/stat", pid);
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if((fp = fopen(status, "r")) == NULL)
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continue;
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name = fgets(buf, sizeof(buf), fp);
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fclose(fp);
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if(name == NULL)
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strcpy(status_tail, "/stat");
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n = read_to_buf(status, buf, sizeof(buf));
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if(n < 0)
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continue;
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name = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
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if(name == 0 || name[1] != ' ')
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@ -113,10 +124,9 @@ extern procps_status_t * procps_scan(int save_user_arg0)
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#endif
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if(save_user_arg0) {
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sprintf(status, "/proc/%d/cmdline", pid);
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if((fp = fopen(status, "r")) == NULL)
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continue;
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if((n=fread(buf, 1, sizeof(buf)-1, fp)) > 0) {
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strcpy(status_tail, "/cmdline");
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n = read_to_buf(status, buf, sizeof(buf));
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if(n > 0) {
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if(buf[n-1]=='\n')
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buf[--n] = 0;
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name = buf;
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@ -131,7 +141,6 @@ extern procps_status_t * procps_scan(int save_user_arg0)
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curstatus.cmd = strdup(buf);
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/* if NULL it work true also */
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}
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fclose(fp);
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}
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return memcpy(&ret_status, &curstatus, sizeof(procps_status_t));
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}
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304
procps/top.c
304
procps/top.c
@ -53,13 +53,13 @@ static int ntop;
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#ifdef CONFIG_FEATURE_USE_TERMIOS
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static int pid_sort (procps_status_t *P, procps_status_t *Q)
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{
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return (Q->pid - P->pid);
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return (Q->pid - P->pid);
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}
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#endif
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static int mem_sort (procps_status_t *P, procps_status_t *Q)
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{
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return (int)(Q->rss - P->rss);
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return (int)(Q->rss - P->rss);
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}
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#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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@ -69,32 +69,32 @@ static cmp_t sort_function[sort_depth];
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static int pcpu_sort (procps_status_t *P, procps_status_t *Q)
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{
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return (Q->pcpu - P->pcpu);
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return (Q->pcpu - P->pcpu);
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}
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static int time_sort (procps_status_t *P, procps_status_t *Q)
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{
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return (int)((Q->stime + Q->utime) - (P->stime + P->utime));
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return (int)((Q->stime + Q->utime) - (P->stime + P->utime));
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}
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static int mult_lvl_cmp(void* a, void* b) {
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int i, cmp_val;
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int i, cmp_val;
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for(i = 0; i < sort_depth; i++) {
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cmp_val = (*sort_function[i])(a, b);
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if (cmp_val != 0)
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return cmp_val;
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}
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return 0;
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for(i = 0; i < sort_depth; i++) {
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cmp_val = (*sort_function[i])(a, b);
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if (cmp_val != 0)
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return cmp_val;
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}
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return 0;
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}
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/* This structure stores some critical information from one frame to
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the next. mostly used for sorting. Added cumulative and resident fields. */
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struct save_hist {
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int ticks;
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int pid;
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int utime;
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int stime;
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int ticks;
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int pid;
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int utime;
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int stime;
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};
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/*
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@ -130,152 +130,152 @@ static unsigned long Hertz;
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*
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*/
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#define FILE_TO_BUF(filename, fd) do{ \
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if (fd == -1 && (fd = open(filename, O_RDONLY)) == -1) { \
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bb_perror_msg_and_die("/proc not be mounted?"); \
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} \
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lseek(fd, 0L, SEEK_SET); \
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if ((local_n = read(fd, buf, sizeof buf - 1)) < 0) { \
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bb_perror_msg_and_die("%s", filename); \
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} \
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buf[local_n] = '\0'; \
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}while(0)
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static int file_to_buf(char *buf, int bufsize, char *filename, int *d)
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{
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int fd = *d;
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int sz;
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#define FILE_TO_BUF2(filename, fd) do{ \
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lseek(fd, 0L, SEEK_SET); \
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if ((local_n = read(fd, buf, sizeof buf - 1)) < 0) { \
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bb_perror_msg_and_die("%s", filename); \
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} \
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buf[local_n] = '\0'; \
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}while(0)
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if (fd == -1) {
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fd = open(filename, O_RDONLY);
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if(fd == -1)
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bb_perror_msg_and_die("is /proc mounted?");
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} else {
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lseek(fd, 0L, SEEK_SET);
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}
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sz = read(fd, buf, bufsize - 1);
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if (sz < 0) {
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bb_perror_msg_and_die("%s", filename);
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}
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buf[sz] = '\0';
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*d = fd;
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return sz;
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}
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static void init_Hertz_value(void) {
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unsigned long user_j, nice_j, sys_j, other_j; /* jiffies (clock ticks) */
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double up_1, up_2, seconds;
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unsigned long jiffies, h;
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char buf[80];
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int uptime_fd = -1;
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int stat_fd = -1;
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static void init_Hertz_value(void)
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{
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unsigned long user_j, nice_j, sys_j, other_j; /* jiffies (clock ticks) */
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double up_1, up_2, seconds;
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unsigned long jiffies, h;
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char buf[80];
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int uptime_fd = -1;
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int stat_fd = -1;
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long smp_num_cpus = sysconf(_SC_NPROCESSORS_CONF);
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long smp_num_cpus = sysconf(_SC_NPROCESSORS_CONF);
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if(smp_num_cpus<1) smp_num_cpus=1;
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do {
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int local_n;
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if(smp_num_cpus<1) smp_num_cpus=1;
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FILE_TO_BUF("uptime", uptime_fd);
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up_1 = strtod(buf, 0);
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FILE_TO_BUF("stat", stat_fd);
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sscanf(buf, "cpu %lu %lu %lu %lu", &user_j, &nice_j, &sys_j, &other_j);
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FILE_TO_BUF2("uptime", uptime_fd);
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up_2 = strtod(buf, 0);
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} while((long)( (up_2-up_1)*1000.0/up_1 )); /* want under 0.1% error */
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do {
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file_to_buf(buf, sizeof(buf), "uptime", &uptime_fd);
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up_1 = strtod(buf, 0);
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file_to_buf(buf, sizeof(buf), "stat", &stat_fd);
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sscanf(buf, "cpu %lu %lu %lu %lu", &user_j, &nice_j, &sys_j, &other_j);
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file_to_buf(buf, sizeof(buf), "uptime", &uptime_fd);
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up_2 = strtod(buf, 0);
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} while((long)( (up_2-up_1)*1000.0/up_1 )); /* want under 0.1% error */
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close(uptime_fd);
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close(stat_fd);
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close(uptime_fd);
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close(stat_fd);
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jiffies = user_j + nice_j + sys_j + other_j;
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seconds = (up_1 + up_2) / 2;
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h = (unsigned long)( (double)jiffies/seconds/smp_num_cpus );
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/* actual values used by 2.4 kernels: 32 64 100 128 1000 1024 1200 */
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switch(h){
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case 30 ... 34 : Hertz = 32; break; /* ia64 emulator */
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case 48 ... 52 : Hertz = 50; break;
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case 58 ... 62 : Hertz = 60; break;
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case 63 ... 65 : Hertz = 64; break; /* StrongARM /Shark */
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case 95 ... 105 : Hertz = 100; break; /* normal Linux */
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case 124 ... 132 : Hertz = 128; break; /* MIPS, ARM */
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case 195 ... 204 : Hertz = 200; break; /* normal << 1 */
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case 253 ... 260 : Hertz = 256; break;
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case 295 ... 304 : Hertz = 300; break; /* 3 cpus */
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case 393 ... 408 : Hertz = 400; break; /* normal << 2 */
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case 495 ... 504 : Hertz = 500; break; /* 5 cpus */
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case 595 ... 604 : Hertz = 600; break; /* 6 cpus */
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case 695 ... 704 : Hertz = 700; break; /* 7 cpus */
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case 790 ... 808 : Hertz = 800; break; /* normal << 3 */
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case 895 ... 904 : Hertz = 900; break; /* 9 cpus */
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case 990 ... 1010 : Hertz = 1000; break; /* ARM */
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case 1015 ... 1035 : Hertz = 1024; break; /* Alpha, ia64 */
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case 1095 ... 1104 : Hertz = 1100; break; /* 11 cpus */
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case 1180 ... 1220 : Hertz = 1200; break; /* Alpha */
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default:
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/* If 32-bit or big-endian (not Alpha or ia64), assume HZ is 100. */
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Hertz = (sizeof(long)==sizeof(int) || htons(999)==999) ? 100UL : 1024UL;
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}
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jiffies = user_j + nice_j + sys_j + other_j;
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seconds = (up_1 + up_2) / 2;
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h = (unsigned long)( (double)jiffies/seconds/smp_num_cpus );
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/* actual values used by 2.4 kernels: 32 64 100 128 1000 1024 1200 */
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switch(h) {
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case 30 ... 34 : Hertz = 32; break; /* ia64 emulator */
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case 48 ... 52 : Hertz = 50; break;
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case 58 ... 62 : Hertz = 60; break;
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case 63 ... 65 : Hertz = 64; break; /* StrongARM /Shark */
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case 95 ... 105 : Hertz = 100; break; /* normal Linux */
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case 124 ... 132 : Hertz = 128; break; /* MIPS, ARM */
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case 195 ... 204 : Hertz = 200; break; /* normal << 1 */
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case 253 ... 260 : Hertz = 256; break;
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case 295 ... 304 : Hertz = 300; break; /* 3 cpus */
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case 393 ... 408 : Hertz = 400; break; /* normal << 2 */
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case 495 ... 504 : Hertz = 500; break; /* 5 cpus */
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case 595 ... 604 : Hertz = 600; break; /* 6 cpus */
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case 695 ... 704 : Hertz = 700; break; /* 7 cpus */
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case 790 ... 808 : Hertz = 800; break; /* normal << 3 */
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case 895 ... 904 : Hertz = 900; break; /* 9 cpus */
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case 990 ... 1010 : Hertz = 1000; break; /* ARM */
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case 1015 ... 1035 : Hertz = 1024; break; /* Alpha, ia64 */
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case 1095 ... 1104 : Hertz = 1100; break; /* 11 cpus */
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case 1180 ... 1220 : Hertz = 1200; break; /* Alpha */
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default:
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/* If 32-bit or big-endian (not Alpha or ia64), assume HZ is 100. */
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Hertz = (sizeof(long)==sizeof(int) || htons(999)==999) ? 100UL : 1024UL;
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}
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}
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static void do_stats(void)
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{
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struct timeval t;
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static struct timeval oldtime;
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struct timezone timez;
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float elapsed_time;
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struct timeval t;
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static struct timeval oldtime;
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struct timezone timez;
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float elapsed_time;
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procps_status_t *cur;
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int total_time, i, n;
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static int prev_count;
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int systime, usrtime, pid;
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procps_status_t *cur;
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int total_time, i, n;
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static int prev_count;
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int systime, usrtime, pid;
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struct save_hist *New_save_hist;
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/*
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* Finds the current time (in microseconds) and calculates the time
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* elapsed since the last update.
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*/
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gettimeofday(&t, &timez);
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elapsed_time = (t.tv_sec - oldtime.tv_sec)
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+ (float) (t.tv_usec - oldtime.tv_usec) / 1000000.0;
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oldtime.tv_sec = t.tv_sec;
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oldtime.tv_usec = t.tv_usec;
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New_save_hist = alloca(sizeof(struct save_hist)*ntop);
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/*
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* Make a pass through the data to get stats.
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*/
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for(n = 0; n < ntop; n++) {
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cur = top + n;
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struct save_hist *New_save_hist;
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/*
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* Calculate time in cur process. Time is sum of user time
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* (usrtime) plus system time (systime).
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* Finds the current time (in microseconds) and calculates the time
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* elapsed since the last update.
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*/
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systime = cur->stime;
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usrtime = cur->utime;
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pid = cur->pid;
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total_time = systime + usrtime;
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New_save_hist[n].ticks = total_time;
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New_save_hist[n].pid = pid;
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New_save_hist[n].stime = systime;
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New_save_hist[n].utime = usrtime;
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gettimeofday(&t, &timez);
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elapsed_time = (t.tv_sec - oldtime.tv_sec)
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+ (float) (t.tv_usec - oldtime.tv_usec) / 1000000.0;
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oldtime.tv_sec = t.tv_sec;
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oldtime.tv_usec = t.tv_usec;
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/* find matching entry from previous pass */
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for (i = 0; i < prev_count; i++) {
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if (save_history[i].pid == pid) {
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total_time -= save_history[i].ticks;
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systime -= save_history[i].stime;
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usrtime -= save_history[i].utime;
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break;
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}
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New_save_hist = alloca(sizeof(struct save_hist)*ntop);
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/*
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* Make a pass through the data to get stats.
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*/
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for(n = 0; n < ntop; n++) {
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cur = top + n;
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/*
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* Calculate time in cur process. Time is sum of user time
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* (usrtime) plus system time (systime).
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*/
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systime = cur->stime;
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usrtime = cur->utime;
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pid = cur->pid;
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total_time = systime + usrtime;
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New_save_hist[n].ticks = total_time;
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New_save_hist[n].pid = pid;
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New_save_hist[n].stime = systime;
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New_save_hist[n].utime = usrtime;
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/* find matching entry from previous pass */
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for (i = 0; i < prev_count; i++) {
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if (save_history[i].pid == pid) {
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total_time -= save_history[i].ticks;
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systime -= save_history[i].stime;
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usrtime -= save_history[i].utime;
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break;
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}
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}
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/*
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* Calculate percent cpu time for cur task.
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*/
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i = (total_time * 10 * 100/Hertz) / elapsed_time;
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if (i > 999)
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i = 999;
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cur->pcpu = i;
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}
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/*
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* Calculate percent cpu time for cur task.
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* Save cur frame's information.
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*/
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i = (total_time * 10 * 100/Hertz) / elapsed_time;
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if (i > 999)
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i = 999;
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cur->pcpu = i;
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}
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/*
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* Save cur frame's information.
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*/
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free(save_history);
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save_history = memcpy(xmalloc(sizeof(struct save_hist)*n), New_save_hist,
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free(save_history);
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save_history = memcpy(xmalloc(sizeof(struct save_hist)*n), New_save_hist,
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sizeof(struct save_hist)*n);
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prev_count = n;
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qsort(top, n, sizeof(procps_status_t), (void*)mult_lvl_cmp);
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prev_count = n;
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qsort(top, n, sizeof(procps_status_t), (void*)mult_lvl_cmp);
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}
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#else
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static cmp_t sort_function;
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@ -335,7 +335,7 @@ static unsigned long display_generic(void)
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/* read load average */
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fp = bb_xfopen("loadavg", "r");
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if (fscanf(fp, "%f %f %f", &avg1, &avg2, &avg3) != 3) {
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bb_error_msg_and_die("failed to read '%s'", "loadavg");
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bb_error_msg_and_die("failed to read 'loadavg'");
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}
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fclose(fp);
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|
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@ -352,11 +352,11 @@ static unsigned long display_generic(void)
|
||||
/* output memory info and load average */
|
||||
/* clear screen & go to top */
|
||||
printf("\e[H\e[J" "Mem: "
|
||||
"%ldK used, %ldK free, %ldK shrd, %ldK buff, %ldK cached\n",
|
||||
used, mfree, shared, buffers, cached);
|
||||
"%ldK used, %ldK free, %ldK shrd, %ldK buff, %ldK cached\n",
|
||||
used, mfree, shared, buffers, cached);
|
||||
printf("Load average: %.2f, %.2f, %.2f "
|
||||
"(State: S=sleeping R=running, W=waiting)\n",
|
||||
avg1, avg2, avg3);
|
||||
"(State: S=sleeping R=running, W=waiting)\n",
|
||||
avg1, avg2, avg3);
|
||||
return total;
|
||||
}
|
||||
|
||||
@ -428,7 +428,7 @@ static void reset_term(void)
|
||||
#endif /* CONFIG_FEATURE_CLEAN_UP */
|
||||
}
|
||||
|
||||
static void sig_catcher (int sig ATTRIBUTE_UNUSED)
|
||||
static void sig_catcher(int sig ATTRIBUTE_UNUSED)
|
||||
{
|
||||
reset_term();
|
||||
}
|
||||
@ -486,11 +486,11 @@ int top_main(int argc, char **argv)
|
||||
|
||||
get_terminal_width_height(0, &col, &lines);
|
||||
if (lines > 4) {
|
||||
lines -= 5;
|
||||
lines -= 5;
|
||||
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
||||
col = col - 80 + 35 - 6;
|
||||
col = col - 80 + 35 - 6;
|
||||
#else
|
||||
col = col - 80 + 35;
|
||||
col = col - 80 + 35;
|
||||
#endif
|
||||
}
|
||||
#endif /* CONFIG_FEATURE_USE_TERMIOS */
|
||||
@ -514,8 +514,8 @@ int top_main(int argc, char **argv)
|
||||
memcpy(top + n, p, sizeof(procps_status_t));
|
||||
}
|
||||
if (ntop == 0) {
|
||||
bb_perror_msg_and_die("scandir('/proc')");
|
||||
}
|
||||
bb_error_msg_and_die("Can't find process info in /proc");
|
||||
}
|
||||
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
||||
if(!Hertz) {
|
||||
init_Hertz_value();
|
||||
@ -523,7 +523,7 @@ int top_main(int argc, char **argv)
|
||||
sleep(1);
|
||||
clearmems();
|
||||
continue;
|
||||
}
|
||||
}
|
||||
do_stats();
|
||||
#else
|
||||
qsort(top, ntop, sizeof(procps_status_t), (void*)sort_function);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user