326 lines
8.6 KiB
C
326 lines
8.6 KiB
C
#include <ctype.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <cutils/sched_policy.h>
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static char *nexttoksep(char **strp, char *sep)
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{
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char *p = strsep(strp,sep);
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return (p == 0) ? "" : p;
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}
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static char *nexttok(char **strp)
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{
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return nexttoksep(strp, " ");
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}
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#define SHOW_PRIO 1
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#define SHOW_TIME 2
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#define SHOW_POLICY 4
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#define SHOW_CPU 8
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#define SHOW_MACLABEL 16
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#define SHOW_NUMERIC_UID 32
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#define SHOW_ABI 64
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#if __LP64__
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#define PC_WIDTH 10 /* Realistically, the top bits will be 0, so don't waste space. */
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#else
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#define PC_WIDTH (2*sizeof(uintptr_t))
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#endif
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static int display_flags = 0;
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static int ppid_filter = 0;
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static void print_exe_abi(int pid);
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static int ps_line(int pid, int tid, char *namefilter)
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{
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char statline[1024];
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char cmdline[1024];
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char macline[1024];
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char user[32];
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struct stat stats;
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int fd, r;
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char *ptr, *name, *state;
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int ppid;
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unsigned rss, vss;
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uintptr_t eip;
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unsigned utime, stime;
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int prio, nice, rtprio, sched, psr;
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struct passwd *pw;
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sprintf(statline, "/proc/%d", pid);
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stat(statline, &stats);
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if(tid) {
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sprintf(statline, "/proc/%d/task/%d/stat", pid, tid);
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cmdline[0] = 0;
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snprintf(macline, sizeof(macline), "/proc/%d/task/%d/attr/current", pid, tid);
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} else {
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sprintf(statline, "/proc/%d/stat", pid);
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sprintf(cmdline, "/proc/%d/cmdline", pid);
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snprintf(macline, sizeof(macline), "/proc/%d/attr/current", pid);
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fd = open(cmdline, O_RDONLY);
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if(fd == 0) {
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r = 0;
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} else {
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r = read(fd, cmdline, 1023);
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close(fd);
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if(r < 0) r = 0;
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}
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cmdline[r] = 0;
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}
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fd = open(statline, O_RDONLY);
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if(fd == 0) return -1;
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r = read(fd, statline, 1023);
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close(fd);
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if(r < 0) return -1;
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statline[r] = 0;
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ptr = statline;
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nexttok(&ptr); // skip pid
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ptr++; // skip "("
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name = ptr;
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ptr = strrchr(ptr, ')'); // Skip to *last* occurence of ')',
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*ptr++ = '\0'; // and null-terminate name.
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ptr++; // skip " "
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state = nexttok(&ptr);
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ppid = atoi(nexttok(&ptr));
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nexttok(&ptr); // pgrp
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nexttok(&ptr); // sid
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nexttok(&ptr); // tty
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nexttok(&ptr); // tpgid
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nexttok(&ptr); // flags
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nexttok(&ptr); // minflt
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nexttok(&ptr); // cminflt
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nexttok(&ptr); // majflt
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nexttok(&ptr); // cmajflt
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#if 1
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utime = atoi(nexttok(&ptr));
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stime = atoi(nexttok(&ptr));
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#else
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nexttok(&ptr); // utime
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nexttok(&ptr); // stime
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#endif
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nexttok(&ptr); // cutime
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nexttok(&ptr); // cstime
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prio = atoi(nexttok(&ptr));
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nice = atoi(nexttok(&ptr));
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nexttok(&ptr); // threads
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nexttok(&ptr); // itrealvalue
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nexttok(&ptr); // starttime
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vss = strtoul(nexttok(&ptr), 0, 10); // vsize
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rss = strtoul(nexttok(&ptr), 0, 10); // rss
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nexttok(&ptr); // rlim
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nexttok(&ptr); // startcode
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nexttok(&ptr); // endcode
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nexttok(&ptr); // startstack
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nexttok(&ptr); // kstkesp
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eip = strtoul(nexttok(&ptr), 0, 10); // kstkeip
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nexttok(&ptr); // signal
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nexttok(&ptr); // blocked
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nexttok(&ptr); // sigignore
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nexttok(&ptr); // sigcatch
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nexttok(&ptr); // wchan
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nexttok(&ptr); // nswap
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nexttok(&ptr); // cnswap
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nexttok(&ptr); // exit signal
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psr = atoi(nexttok(&ptr)); // processor
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rtprio = atoi(nexttok(&ptr)); // rt_priority
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sched = atoi(nexttok(&ptr)); // scheduling policy
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nexttok(&ptr); // tty
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if(tid != 0) {
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ppid = pid;
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pid = tid;
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}
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pw = getpwuid(stats.st_uid);
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if(pw == 0 || (display_flags & SHOW_NUMERIC_UID)) {
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sprintf(user,"%d",(int)stats.st_uid);
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} else {
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strcpy(user,pw->pw_name);
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}
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if(ppid_filter != 0 && ppid != ppid_filter) {
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return 0;
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}
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if(!namefilter || !strncmp(cmdline[0] ? cmdline : name, namefilter, strlen(namefilter))) {
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if (display_flags & SHOW_MACLABEL) {
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fd = open(macline, O_RDONLY);
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strcpy(macline, "-");
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if (fd >= 0) {
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r = read(fd, macline, sizeof(macline)-1);
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close(fd);
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if (r > 0)
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macline[r] = 0;
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}
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printf("%-30s %-9s %-5d %-5d %s\n", macline, user, pid, ppid, cmdline[0] ? cmdline : name);
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return 0;
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}
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printf("%-9s %-5d %-5d %-6d %-5d", user, pid, ppid, vss / 1024, rss * 4);
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if (display_flags & SHOW_CPU)
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printf(" %-2d", psr);
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if (display_flags & SHOW_PRIO)
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printf(" %-5d %-5d %-5d %-5d", prio, nice, rtprio, sched);
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if (display_flags & SHOW_POLICY) {
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SchedPolicy p;
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if (get_sched_policy(pid, &p) < 0)
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printf(" un ");
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else
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printf(" %.2s ", get_sched_policy_name(p));
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}
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char path[PATH_MAX];
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snprintf(path, sizeof(path), "/proc/%d/wchan", pid);
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char wchan[10];
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int fd = open(path, O_RDONLY);
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ssize_t wchan_len = read(fd, wchan, sizeof(wchan));
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if (wchan_len == -1) {
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wchan[wchan_len = 0] = '\0';
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}
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close(fd);
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printf(" %10.*s %0*" PRIxPTR " %s ", (int) wchan_len, wchan, (int) PC_WIDTH, eip, state);
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if (display_flags & SHOW_ABI) {
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print_exe_abi(pid);
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}
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printf("%s", cmdline[0] ? cmdline : name);
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if(display_flags&SHOW_TIME)
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printf(" (u:%d, s:%d)", utime, stime);
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printf("\n");
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}
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return 0;
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}
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static void print_exe_abi(int pid)
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{
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int fd, r;
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char exeline[1024];
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sprintf(exeline, "/proc/%d/exe", pid);
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fd = open(exeline, O_RDONLY);
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if(fd == 0) {
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printf(" ");
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return;
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}
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r = read(fd, exeline, 5 /* 4 byte ELFMAG + 1 byte EI_CLASS */);
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close(fd);
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if(r < 0) {
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printf(" ");
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return;
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}
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if (memcmp("\177ELF", exeline, 4) != 0) {
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printf("?? ");
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return;
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}
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switch (exeline[4]) {
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case 1:
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printf("32 ");
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return;
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case 2:
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printf("64 ");
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return;
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default:
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printf("?? ");
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return;
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}
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}
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void ps_threads(int pid, char *namefilter)
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{
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char tmp[128];
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DIR *d;
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struct dirent *de;
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sprintf(tmp,"/proc/%d/task",pid);
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d = opendir(tmp);
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if(d == 0) return;
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while((de = readdir(d)) != 0){
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if(isdigit(de->d_name[0])){
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int tid = atoi(de->d_name);
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if(tid == pid) continue;
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ps_line(pid, tid, namefilter);
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}
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}
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closedir(d);
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}
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int ps_main(int argc, char **argv)
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{
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DIR *d;
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struct dirent *de;
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char *namefilter = 0;
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int pidfilter = 0;
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int threads = 0;
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d = opendir("/proc");
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if(d == 0) return -1;
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while(argc > 1){
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if(!strcmp(argv[1],"-t")) {
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threads = 1;
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} else if(!strcmp(argv[1],"-n")) {
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display_flags |= SHOW_NUMERIC_UID;
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} else if(!strcmp(argv[1],"-x")) {
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display_flags |= SHOW_TIME;
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} else if(!strcmp(argv[1], "-Z")) {
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display_flags |= SHOW_MACLABEL;
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} else if(!strcmp(argv[1],"-P")) {
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display_flags |= SHOW_POLICY;
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} else if(!strcmp(argv[1],"-p")) {
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display_flags |= SHOW_PRIO;
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} else if(!strcmp(argv[1],"-c")) {
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display_flags |= SHOW_CPU;
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} else if(!strcmp(argv[1],"--abi")) {
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display_flags |= SHOW_ABI;
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} else if(!strcmp(argv[1],"--ppid")) {
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ppid_filter = atoi(argv[2]);
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argc--;
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argv++;
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} else if(isdigit(argv[1][0])){
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pidfilter = atoi(argv[1]);
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} else {
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namefilter = argv[1];
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}
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argc--;
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argv++;
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}
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if (display_flags & SHOW_MACLABEL) {
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printf("LABEL USER PID PPID NAME\n");
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} else {
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printf("USER PID PPID VSIZE RSS %s%s %sWCHAN %*s %sNAME\n",
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(display_flags&SHOW_CPU)?"CPU ":"",
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(display_flags&SHOW_PRIO)?"PRIO NICE RTPRI SCHED ":"",
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(display_flags&SHOW_POLICY)?"PCY " : "",
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(int) PC_WIDTH, "PC",
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(display_flags&SHOW_ABI)?"ABI " : "");
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}
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while((de = readdir(d)) != 0){
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if(isdigit(de->d_name[0])){
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int pid = atoi(de->d_name);
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if(!pidfilter || (pidfilter == pid)) {
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ps_line(pid, 0, namefilter);
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if(threads) ps_threads(pid, namefilter);
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}
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}
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}
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closedir(d);
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return 0;
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}
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