linux ps 程序源码,linux命令之ps源码简单版，支持android

矫情吗；* 2023-01-20 09:45 4阅读 0赞

\#include

static char \*nexttoksep(char \*\*strp, char \*sep)

char \*p = strsep(strp,sep);

return (p == 0) ? "" : p;

static char \*nexttok(char \*\*strp)

return nexttoksep(strp, " ");

\#define SHOW\_PRIO 1

\#define SHOW\_TIME 2

\#define SHOW\_POLICY 4

static int display\_flags = 0;

static int ps\_line(int pid, int tid, char \*namefilter)

char statline\[1024\];

char cmdline\[1024\];

char user\[32\];

struct stat stats;

int fd, r;

char \*ptr, \*name, \*state;

int ppid, tty;

unsigned wchan, rss, vss, eip;

unsigned utime, stime;

int prio, nice, rtprio, sched;

struct passwd \*pw;

sprintf(statline, "/proc/%d", pid);

stat(statline, &stats);

if(tid) \{

sprintf(statline, "/proc/%d/task/%d/stat", pid, tid);

cmdline\[0\] = 0;

\} else \{

sprintf(statline, "/proc/%d/stat", pid);

sprintf(cmdline, "/proc/%d/cmdline", pid);

fd = open(cmdline, O\_RDONLY);

if(fd == 0) \{

r = 0;

\} else \{

r = read(fd, cmdline, 1023);

close(fd);

if(r < 0) r = 0;

cmdline\[r\] = 0;

fd = open(statline, O\_RDONLY);

if(fd == 0) return -1;

r = read(fd, statline, 1023);

close(fd);

if(r < 0) return -1;

statline\[r\] = 0;

ptr = statline;

nexttok(&ptr); // skip pid

ptr++; // skip "("

name = ptr;

ptr = strrchr(ptr, ')'); // Skip to \*last\* occurence of ')',

\*ptr++ = '\\0'; // and null-terminate name.

ptr++; // skip " "

state = nexttok(&ptr);

ppid = atoi(nexttok(&ptr));

nexttok(&ptr); // pgrp

nexttok(&ptr); // sid

tty = atoi(nexttok(&ptr));

nexttok(&ptr); // tpgid

nexttok(&ptr); // flags

nexttok(&ptr); // minflt

nexttok(&ptr); // cminflt

nexttok(&ptr); // majflt

nexttok(&ptr); // cmajflt

\#if 1

utime = atoi(nexttok(&ptr));

stime = atoi(nexttok(&ptr));

\#else

nexttok(&ptr); // utime

nexttok(&ptr); // stime

\#endif

nexttok(&ptr); // cutime

nexttok(&ptr); // cstime

prio = atoi(nexttok(&ptr));

nice = atoi(nexttok(&ptr));

nexttok(&ptr); // threads

nexttok(&ptr); // itrealvalue

nexttok(&ptr); // starttime

vss = strtoul(nexttok(&ptr), 0, 10); // vsize

rss = strtoul(nexttok(&ptr), 0, 10); // rss

nexttok(&ptr); // rlim

nexttok(&ptr); // startcode

nexttok(&ptr); // endcode

nexttok(&ptr); // startstack

nexttok(&ptr); // kstkesp

eip = strtoul(nexttok(&ptr), 0, 10); // kstkeip

nexttok(&ptr); // signal

nexttok(&ptr); // blocked

nexttok(&ptr); // sigignore

nexttok(&ptr); // sigcatch

wchan = strtoul(nexttok(&ptr), 0, 10); // wchan

nexttok(&ptr); // nswap

nexttok(&ptr); // cnswap

nexttok(&ptr); // exit signal

nexttok(&ptr); // processor

rtprio = atoi(nexttok(&ptr)); // rt\_priority

sched = atoi(nexttok(&ptr)); // scheduling policy

tty = atoi(nexttok(&ptr));

if(tid != 0) \{

ppid = pid;

pid = tid;

pw = getpwuid(stats.st\_uid);

if(pw == 0) \{

sprintf(user,"%d",(int)stats.st\_uid);

\} else \{

strcpy(user,pw->pw\_name);

if(!namefilter || !strncmp(name, namefilter, strlen(namefilter))) \{

printf("%-9s %-5d %-5d %-6d %-5d", user, pid, ppid, vss / 1024, rss \* 4);

if(display\_flags&SHOW\_PRIO)

printf(" %-5d %-5d %-5d %-5d", prio, nice, rtprio, sched);

printf(" %08x %08x %s %s", wchan, eip, state, cmdline\[0\] ? cmdline : name);

if(display\_flags&SHOW\_TIME)

printf(" (u:%d, s:%d)", utime, stime);

printf("\\n");

return 0;

void ps\_threads(int pid, char \*namefilter)

char tmp\[128\];

DIR \*d;

struct dirent \*de;

sprintf(tmp,"/proc/%d/task",pid);

d = opendir(tmp);

if(d == 0) return;

while((de = readdir(d)) != 0)\{

if(isdigit(de->d\_name\[0\]))\{

int tid = atoi(de->d\_name);

if(tid == pid) continue;

ps\_line(pid, tid, namefilter);

closedir(d);

//gcc -o test ps.c sched\_policy.h sched\_policy.c -lpthread

int main(int argc, char \*argv\[\])

DIR \*d;

struct dirent \*de;

char \*namefilter = 0;

int pidfilter = 0;

int threads = 0;

d = opendir("/proc");

if(d == 0) return -1;

while(argc > 1)\{

if(!strcmp(argv\[1\],"-t")) \{

threads = 1;

\} else if(!strcmp(argv\[1\],"-x")) \{

display\_flags |= SHOW\_TIME;

\} else if(!strcmp(argv\[1\],"-P")) \{

display\_flags |= SHOW\_POLICY;

\} else if(!strcmp(argv\[1\],"-p")) \{

display\_flags |= SHOW\_PRIO;

\} else if(isdigit(argv\[1\]\[0\]))\{

pidfilter = atoi(argv\[1\]);

\} else \{

namefilter = argv\[1\];

argc--;

argv++;

printf("USER PID PPID VSIZE RSS %s %s WCHAN PC NAME\\n",

(display\_flags&SHOW\_PRIO)?"PRIO NICE RTPRI SCHED ":"",

(display\_flags&SHOW\_POLICY)?"PCY " : "");

while((de = readdir(d)) != 0)\{

if(isdigit(de->d\_name\[0\]))\{

int pid = atoi(de->d\_name);

if(!pidfilter || (pidfilter == pid)) \{

ps\_line(pid, 0, namefilter);

if(threads) ps\_threads(pid, namefilter);

closedir(d);

return 0;

linux ps 程序源码,linux命令之ps源码简单版，支持android

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