#define RUNAS_CHILD_STACK_SIZE 10485760
+#ifndef MAP_STACK
+#define MAP_STACK 0
+#endif
+
struct run_as_data {
int (*cmd)(void *data);
void *data;
if (data->gid != getegid()) {
ret = setegid(data->gid);
if (ret < 0) {
- perror("setegid");
+ PERROR("setegid");
return EXIT_FAILURE;
}
}
if (data->uid != geteuid()) {
ret = seteuid(data->uid);
if (ret < 0) {
- perror("seteuid");
+ PERROR("seteuid");
return EXIT_FAILURE;
}
}
writelen = write(data->retval_pipe, &sendret.c[index],
writeleft);
if (writelen < 0) {
- perror("write");
+ PERROR("write");
return EXIT_FAILURE;
}
writeleft -= writelen;
ret = pipe(retval_pipe);
if (ret < 0) {
- perror("pipe");
+ PERROR("pipe");
+ retval.i = ret;
goto end;
}
run_as_data.data = data;
MAP_PRIVATE | MAP_GROWSDOWN | MAP_ANONYMOUS | MAP_STACK,
-1, 0);
if (child_stack == MAP_FAILED) {
- perror("mmap");
- ret = -ENOMEM;
+ PERROR("mmap");
+ retval.i = -ENOMEM;
goto close_pipe;
}
/*
CLONE_FILES | SIGCHLD,
&run_as_data, NULL);
if (pid < 0) {
- perror("clone");
- ret = pid;
+ PERROR("clone");
+ retval.i = pid;
goto unmap_stack;
}
/* receive return value */
do {
readlen = read(retval_pipe[0], &retval.c[index], readleft);
if (readlen < 0) {
- perror("read");
+ PERROR("read");
ret = -1;
break;
}
*/
pid = waitpid(pid, &status, 0);
if (pid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
- perror("wait");
- ret = -1;
+ PERROR("wait");
+ retval.i = -1;
}
unmap_stack:
ret = munmap(child_stack, RUNAS_CHILD_STACK_SIZE);
if (ret < 0) {
- perror("munmap");
+ PERROR("munmap");
+ retval.i = ret;
}
close_pipe:
- close(retval_pipe[0]);
- close(retval_pipe[1]);
+ ret = close(retval_pipe[0]);
+ if (ret) {
+ PERROR("close");
+ }
+ ret = close(retval_pipe[1]);
+ if (ret) {
+ PERROR("close");
+ }
end:
return retval.i;
}