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LibC: Implement dummy rename() so vim can save files 

vim calls rename when saving a file. This patch adds dummy
implementation that only works for regular files and does a copy instead
of proper rename.
This commit is contained in:
Bananymous 2024-08-05 20:16:05 +03:00
parent 0a7c316ffb
commit fe94d6cf89
1 changed files with 47 additions and 3 deletions
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50
userspace/libraries/LibC/stdio.cpp
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@ -604,11 +604,55 @@ int remove(const char* path)
return unlink(path);
}
// TODO
int rename(const char* old, const char* _new)
{
dwarnln("rename({}, {})", old, _new);
ASSERT_NOT_REACHED();
struct stat st;
if (lstat(old, &st) == -1)
return -1;
if (!S_ISREG(st.st_mode))
{
errno = ENOTSUP;
return -1;
}
if (unlink(_new) == -1 && errno != ENOENT)
return -1;
int old_fd = open(old, O_RDWR);
int new_fd = open(_new, O_RDWR | O_CREAT | O_EXCL, st.st_mode);
if (old_fd == -1 || new_fd == -1)
goto error;
for (;;)
{
char buffer[512];
ssize_t nread = read(old_fd, buffer, sizeof(buffer));
if (nread == -1)
{
unlink(_new);
goto error;
}
if (nread == 0)
break;
if (write(new_fd, buffer, nread) != nread)
{
unlink(_new);
goto error;
}
}
unlink(old);
return 0;
error:
if (old_fd != -1)
close(old_fd);
if (new_fd != -1)
close(new_fd);
return -1;
}
void rewind(FILE* file)