mirror of https://github.com/proot-me/proot.git
105 lines
1.8 KiB
C
105 lines
1.8 KiB
C
#include <pthread.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <sys/wait.h>
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static void *routine(void *path)
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{
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int status;
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status = chdir(path);
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if (status < 0) {
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perror("chdir");
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pthread_exit((void *)-1);
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}
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pthread_exit(NULL);
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}
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static void pterror(const char *message, int error)
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{
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fprintf(stderr, "%s: %s\n", message, strerror(error));
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}
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void check_cwd(const char *expected)
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{
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char path[PATH_MAX];
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int status;
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if (getcwd(path, PATH_MAX) == NULL) {
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perror("getcwd");
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exit(EXIT_FAILURE);
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}
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if (strcmp(path, expected) != 0) {
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fprintf(stderr, "getcwd: %s != %s\n", path, expected);
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exit(EXIT_FAILURE);
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}
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status = readlink("/proc/self/cwd", path, PATH_MAX - 1);
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if (status < 0) {
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perror("readlink");
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exit(EXIT_FAILURE);
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}
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path[status] = '\0';
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if (strcmp(path, expected) != 0) {
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fprintf(stderr, "readlink /proc/self/cwd: %s != %s\n", path, expected);
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exit(EXIT_FAILURE);
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}
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}
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int main(int argc, char *argv[])
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{
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pthread_t thread;
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int child_status;
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void *result;
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int status;
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status = pthread_create(&thread, NULL, routine, "/etc");
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if (status != 0) {
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pterror("pthread_create", status);
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exit(EXIT_FAILURE);
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}
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status = pthread_join(thread, &result);
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if (status != 0) {
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pterror("pthread_create", status);
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exit(EXIT_FAILURE);
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}
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if (result != NULL)
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exit(EXIT_FAILURE);
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check_cwd("/etc");
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switch (fork()) {
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case -1:
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perror("readlink");
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exit(EXIT_FAILURE);
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case 0: /* child */
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status = chdir("/etc");
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if (status < 0) {
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perror("chdir");
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exit(EXIT_FAILURE);
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}
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exit(EXIT_SUCCESS);
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default:
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status = wait(&child_status);
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if (status < 0 || child_status != 0) {
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perror("wait()");
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exit(EXIT_FAILURE);
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}
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check_cwd("/etc");
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break;
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}
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exit(EXIT_SUCCESS);
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}
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