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#include <init/fs/misc.h>
#include <init/stdlib.h>
#include <shared/flags.h>
#include <shared/mem.h>
#include <shared/syscalls.h>
bool fork2_n_mount(const char *path) {
handle_t h = _syscall_fs_fork2();
if (h) _syscall_mount(h, path, strlen(path));
return h;
}
void fs_passthru(const char *prefix) {
struct fs_wait_response res;
int buf_size = 64;
char buf[ 64];
int ret, prefix_len;
if (prefix) prefix_len = strlen(prefix);
while (!_syscall_fs_wait(buf, buf_size, &res)) {
switch (res.op) {
case VFSOP_OPEN:
if (prefix) {
if (prefix_len + res.len <= buf_size) {
// TODO memmove
char tmp[64];
memcpy(tmp, buf, res.len);
memcpy(buf, prefix, prefix_len);
memcpy(buf + prefix_len, tmp, res.len);
ret = _syscall_open(buf, res.len + prefix_len);
} else ret = -1;
} else {
ret = _syscall_open(buf, res.len);
}
_syscall_fs_respond(NULL, ret);
break;
case VFSOP_READ:
if (res.capacity > buf_size)
res.capacity = buf_size; /* don't overflow the buffer */
ret = _syscall_read(res.id, buf, res.capacity, res.offset);
_syscall_fs_respond(buf, ret);
break;
// temporarily doesn't support writing
// also TODO closing
default:
_syscall_fs_respond(NULL, -1);
break;
}
}
_syscall_exit(0);
}
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