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feat(cred): 初步实现Cred (#846)

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* 初步实现Cred

* 添加seteuid和setegid

* 添加cred测试程序

* 修改Cred::fscmp返回结果为CredFsCmp枚举

* 完善root用户相关信息
This commit is contained in:
Jomo
2024-08-02 09:42:34 +08:00
committed by GitHub
parent 703ce5a77c
commit 0648a547da
13 changed files with 405 additions and 24 deletions
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42
user/apps/test_cred/main.c Normal file
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#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
int main()
{
printf("Current uid: %d, euid: %d, gid: %d, egid: %d\n\n", getuid(), geteuid(), getgid(), getegid());
// 测试uid
printf("Set uid 1000\n");
setuid(1000);
int uid = getuid();
assert(uid == 1000);
printf("Current uid:%d\n\n", uid);
// 测试gid
printf("Set gid 1000\n");
setgid(1000);
int gid = getgid();
assert(gid == 1000);
printf("Current gid:%d\n\n", gid);
// 测试euid
printf("Setg euid 1000\n");
seteuid(1000);
int euid = geteuid();
assert(euid == 1000);
printf("Current euid:%d\n\n", euid);
// 测试egid
printf("Set egid 1000\n");
setegid(1000);
int egid = getegid();
assert(egid == 1000);
printf("Current egid:%d\n\n", egid);
// 测试uid在非root用户下无法修改
printf("Try to setuid for non_root.\n");
assert(setuid(0) < 0); // 非root用户无法修改uid
printf("Current uid: %d, euid: %d, gid: %d, egid: %d\n", getuid(), geteuid(), getgid(), getegid());
}