reftable/stack: stop using `read_in_full()`
There is a single callsite of `read_in_full()` in the reftable library. Open-code the function to reduce our dependency on the Git library. Note that we only partially port over the logic from `read_in_full()` and its underlying `xread()` helper. Most importantly, the latter also knows to handle `EWOULDBLOCK` via `handle_nonblock()`. This logic is irrelevant for us though because the reftable library never sets the `O_NONBLOCK` option in the first place. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Patrick Steinhardt committed
Feb 18, 2025 at 10:20 UTC
cb3e368b6913a2446f245e7ae7a7e4ae4a2e6794
1 file changed
+14
-4
reftable/stack.c
+14
-4
index 6c4e8be19b..1cc47b94d9 100644
--- a/reftable/stack.c
+++ b/reftable/stack.c
@@ -115,13 +115,16 @@ out:
static int fd_read_lines(int fd, char ***namesp)
{
- off_t size = lseek(fd, 0, SEEK_END);
char *buf = NULL;
int err = 0;
+ off_t size;
+
+ size = lseek(fd, 0, SEEK_END);
if (size < 0) {
err = REFTABLE_IO_ERROR;
goto done;
}
+
err = lseek(fd, 0, SEEK_SET);
if (err < 0) {
err = REFTABLE_IO_ERROR;
@@ -134,9 +137,16 @@ static int fd_read_lines(int fd, char ***namesp)
goto done;
}
- if (read_in_full(fd, buf, size) != size) {
- err = REFTABLE_IO_ERROR;
- goto done;
+ for (off_t total_read = 0; total_read < size; ) {
+ ssize_t bytes_read = read(fd, buf + total_read, size - total_read);
+ if (bytes_read < 0 && (errno == EAGAIN || errno == EINTR))
+ continue;
+ if (bytes_read < 0 || !bytes_read) {
+ err = REFTABLE_IO_ERROR;
+ goto done;
+ }
+
+ total_read += bytes_read;
}
buf[size] = 0;