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robust detect already in correspond cgroup

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springzfx
2020-05-27 00:00:05 +08:00
parent 1d29828d1b
commit c32457a1aa
8 changed files with 67 additions and 43 deletions
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28
src/cgroup_attach.cpp
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@@ -27,34 +27,6 @@ string get_cgroup2_mount_point() {
return s;
}
string getCgroup(const pid_t &pid) { return getCgroup(to_str(pid)); }
string getCgroup(const string &pid) {
string cgroup_f = to_str("/proc/", pid, "/cgroup");
if (!fileExist(cgroup_f)) return "";
stringstream buffer;
string cgroup;
FILE *f = fopen(cgroup_f.c_str(), "r");
char buf[READ_SIZE_MAX] = "";
char *flag = buf;
while (flag != NULL) {
buffer.clear();
while (!flag || buf[strlen(buf) - 1] != '\n') {
flag = fgets(buf, READ_SIZE_MAX, f);
if (flag) buffer << buf;
}
string line = buffer.str();
if (line[0] == '0') { // 0::/user.slice/user-1000.slice
cgroup = (*(line.end() - 1) == '\n') ? line.substr(3, line.length() - 4)
: line.substr(3);
break;
}
}
fclose(f);
return cgroup;
}
bool validate(string pid, string cgroup) {
bool pid_v = validPid(pid);
bool cg_v = validCgroup(cgroup);