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#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;
}
static 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 - 1);
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);
}
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