| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <signal.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #define TIMEOUT 5 |
| #define BUF_SIZE 256 |
| |
| static sig_atomic_t end; |
| |
| int test_getcwd(char *init_cwd) |
| { |
| int i = 0; |
| char cur_cwd[BUF_SIZE]; |
| while (1) { |
| getcwd(cur_cwd, BUF_SIZE); |
| if (strncmp(init_cwd, cur_cwd, BUF_SIZE)) { |
| printf("[%u] %s != %s\n", i, init_cwd, cur_cwd); |
| return 1; |
| } |
| if (end) |
| break; |
| i++; |
| } |
| return 0; |
| } |
| |
| void do_rename(char *prefix) |
| { |
| int i = 0; |
| int fd; |
| char c_name[BUF_SIZE]; |
| char n_name[BUF_SIZE]; |
| |
| strncpy(c_name, prefix, BUF_SIZE); |
| |
| fd = open(c_name, O_CREAT | O_RDWR, 0644); |
| if (fd < 0) { |
| fprintf(stderr, "failed to create file %s: %s\n", |
| c_name, strerror(errno)); |
| exit(1); |
| } |
| close(fd); |
| |
| while (1) { |
| i++; |
| snprintf(n_name, BUF_SIZE, "%s%u", prefix, i); |
| rename(c_name, n_name); |
| strncpy(c_name, n_name, BUF_SIZE); |
| } |
| } |
| |
| void sigproc(int sig) |
| { |
| end = 1; |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| char *init_cwd; |
| pid_t pid; |
| int status; |
| int ret = 1; |
| |
| if (argc != 2) { |
| printf("Usage: %s <dir>\n", argv[0]); |
| exit(1); |
| } |
| |
| init_cwd = argv[1]; |
| ret = chdir(init_cwd); |
| if (ret < 0) { |
| perror("chdir failed"); |
| exit(1); |
| } |
| |
| if (signal(SIGALRM, sigproc) == SIG_ERR) { |
| perror("signal failed"); |
| exit(1); |
| } |
| |
| alarm(TIMEOUT); |
| |
| pid = fork(); |
| if (pid < 0) { |
| perror("fork failed"); |
| exit(1); |
| } else if (pid == 0) { |
| do_rename("t_getcwd_testfile"); |
| } else { |
| ret = test_getcwd(init_cwd); |
| kill(pid, SIGTERM); |
| waitpid(pid, &status, 0); |
| } |
| |
| exit(ret); |
| } |