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process_cmdline_utils.h
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203 lines (188 loc) · 4.93 KB
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#ifndef PROCESS_CMDLINE_UTILS_H_
#define PROCESS_CMDLINE_UTILS_H_
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <string.h>
#include <vector>
#include <time.h>
#include "kernel_root_helper.h"
#include "kernel_root_key.h"
static ssize_t find_all_cmdline_process(const char* str_root_key, const char* target_cmdline, std::vector<pid_t> & vOut)
{
int pid;
DIR* dir;
FILE *fp;
char filename[32];
char cmdline[256];
struct dirent * entry;
vOut.clear();
if (kernel_root::get_root(str_root_key) != 0) {
return -1000001;
}
dir = opendir("/proc");
if (dir == NULL) {
return -1000002;
}
while ((entry = readdir(dir)) != NULL) {
// 如果读取到的是"."或者".."则跳过，读取到的不是文件夹名字也跳过
if ((strcmp(entry->d_name, ".") == 0) || (strcmp(entry->d_name, "..") == 0)) {
continue;
}
else if (entry->d_type != DT_DIR) {
continue;
}
else if (strspn(entry->d_name, "1234567890") != strlen(entry->d_name)) {
continue;
}
pid = atoi(entry->d_name);
if (pid != 0) {
sprintf(filename, "/proc/%d/cmdline", pid);
fp = fopen(filename, "r");
if (fp) {
fgets(cmdline, sizeof(cmdline), fp);
fclose(fp);
//TRACE("[+] find %d process cmdline: %s\n", id, cmdline);
if (strstr(cmdline, target_cmdline)) {
/* process found */
vOut.push_back(pid);
}
}
}
}
closedir(dir);
return 0;
}
static ssize_t safe_find_all_cmdline_process(const char* str_root_key, const char* target_cmdline, std::vector<pid_t> & vOut)
{
fork_pipe_info finfo;
if(fork_pipe_child_process(finfo)) {
ssize_t ret = find_all_cmdline_process(str_root_key, target_cmdline, vOut);
std::vector<int> vec_pid;
for (pid_t t : vOut) {
vec_pid.push_back(t);
}
write_errcode_to_father(finfo, ret);
write_vec_int_to_father(finfo, vec_pid);
_exit(0);
return 0;
}
ssize_t err = 0;
if(!wait_fork_child_process(finfo)) {
err = -1000011;
} else {
std::vector<int> vec_pid;
if(!read_errcode_from_child(finfo, err)) {
err = -1000012;
} else if(!read_vec_int_from_child(finfo, vec_pid)) {
err = -1000013;
}
for (int pid : vec_pid) {
vOut.push_back(pid);
}
}
return err;
}
static ssize_t wait_and_find_cmdline_process(const char* str_root_key, const char* target_cmdline, int timeout, pid_t & pid)
{
int old_pid;
int fd;
size_t length;
DIR* dir;
char filename[32];
char arg_list[1024];
char* next_arg;
std::string all_cmdline;
struct dirent * entry;
pid = 0;
if (kernel_root::get_root(str_root_key) != 0) {
return -1000021;
}
clock_t start = clock();
while (1) {
sleep(0);
dir = opendir("/proc");
if (dir == NULL) {
return -1000022;
}
while ((entry = readdir(dir)) != NULL) {
// 如果读取到的是"."或者".."则跳过，读取到的不是文件夹名字也跳过
if ((strcmp(entry->d_name, ".") == 0) || (strcmp(entry->d_name, "..") == 0)) {
continue;
}
else if (entry->d_type != DT_DIR) {
continue;
}
else if (strspn(entry->d_name, "1234567890") != strlen(entry->d_name)) {
continue;
}
old_pid = atoi(entry->d_name);
if (old_pid != 0) {
sprintf(filename, "/proc/%d/cmdline", old_pid);
fd = open(filename, O_RDONLY);
if (fd >= 0) {
length = read (fd, arg_list, sizeof (arg_list));
close(fd);
/* read does not NUL-terminate the buffer, so do it here. */
arg_list[length] = '\0';
next_arg = arg_list;
while (next_arg < arg_list + length) {
/* Print the argument. Each is NUL-terminated,
* so just treat it like an ordinary string.
*/
//
if(!all_cmdline.empty()) {
all_cmdline += " ";
}
all_cmdline+=next_arg;
/* Advance to the next argument. Since each argument is NUL-terminated,
* strlen counts the length of the next argument, not the entire argument list.
*/
next_arg += strlen (next_arg) + 1;
}
//printf("[+] find %d process arg: %s\n", old_pid, all_cmdline.c_str());
if(all_cmdline.find(target_cmdline) != -1) {
/* process found */
pid = old_pid;
break;
}
}
}
}
closedir(dir);
if (pid > 0) {
break;
}
clock_t finish = clock();
double total_time = (double)(finish - start) / CLOCKS_PER_SEC;
if(total_time >= timeout) {
break;
}
}
return pid > 0 ? 0 : -1000023;
}
static ssize_t safe_wait_and_find_cmdline_process(const char* str_root_key, const char* target_cmdline, int timeout, pid_t &pid)
{
fork_pipe_info finfo;
if(fork_pipe_child_process(finfo)) {
pid_t pid;
ssize_t ret = wait_and_find_cmdline_process(str_root_key, target_cmdline, timeout, pid);
write_errcode_to_father(finfo, ret);
write_int_to_father(finfo, pid);
_exit(0);
return 0;
}
ssize_t err = 0;
if(!wait_fork_child_process(finfo)) {
err = -1000031;
} else {
if(!read_errcode_from_child(finfo, err)) {
err = -1000032;
} else if(!read_int_from_child(finfo, pid)) {
err = -1000033;
}
}
return err;
}
#endif /* PROCESS_CMDLINE_UTILS_H_ */