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remove path max len limit

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springzfx
2020-05-26 23:04:12 +08:00
parent 4fea0d39a2
commit 1d29828d1b
4 changed files with 28 additions and 20 deletions
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30
src/cgroup_attach.cpp
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@@ -19,8 +19,8 @@ string get_cgroup2_mount_point() {
stringstream buffer;
FILE *fp = popen("findmnt -t cgroup2 -n -o TARGET", "r");
if (!fp) return "";
char buf[64];
while (fgets(buf, 64, fp) != NULL) { buffer << buf; }
char buf[READ_SIZE_MAX];
while (fgets(buf, READ_SIZE_MAX, fp) != NULL) { buffer << buf; }
pclose(fp);
string s = buffer.str();
s.pop_back(); // remove newline character
@@ -32,17 +32,27 @@ 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 "";
char buf[128];
stringstream buffer;
string cgroup;
FILE *f = fopen(cgroup_f.c_str(), "r");
int id;
char cgroup[256];
while (fgets(buf, 128, f) != NULL) {
if (buf[0] == '0') {
if (sscanf(buf, "%*i::%s", cgroup) == 1) return cgroup;
error("sscanf %s failed", buf);
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;
}
}
return "";
fclose(f);
return cgroup;
}
bool validate(string pid, string cgroup) {