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repl: log errors writing to history file

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These errors are now logged and explicitly ignored, rather than
implicitly ignored.

The simple logic is duplicated in ReadlineLikeInteractor's getLine() and
destructor, rather than refactoring history writing into a separate
function. This is a tiny amount of logic and these two locations are
right next to each other.

Change-Id: Ia26015466a17f2b11952df5317a4d150d79dc184
This commit is contained in:
Qyriad 2024-05-19 12:57:14 -06:00
parent 20981461d4
commit 6219596ab1
1 changed files with 17 additions and 2 deletions
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19
src/libcmd/repl-interacter.cc
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@ -1,6 +1,8 @@
#include <cstdio>
#include <iostream>
#include <string>
#include <string_view>
#include <cerrno>
#ifdef READLINE
#include <readline/history.h>
@ -176,7 +178,14 @@ bool ReadlineLikeInteracter::getLine(std::string & input, ReplPromptType promptT
if (!s)
return false;
write_history(historyFile.c_str());
if (write_history(historyFile.c_str()) != 0) {
// write_history returns the result of fclose() (which also flushes).
// We should explicitly ignore these errors, but log them so the user
// isn't confused why their history is getting eaten.
error_t const fcloseErr = errno;
std::string_view const errMsg(strerror(fcloseErr));
warn("ignoring error writing repl history to %s: %s", historyFile, errMsg);
}
input += s;
input += '\n';
return true;
@ -184,7 +193,13 @@ bool ReadlineLikeInteracter::getLine(std::string & input, ReplPromptType promptT
ReadlineLikeInteracter::~ReadlineLikeInteracter()
{
write_history(historyFile.c_str());
if (write_history(historyFile.c_str()) != 0) {
// write_history returns the result of fclose() (which also flushes).
// We should explicitly ignore these errors, but log them.
error_t const fcloseErr = errno;
std::string_view const errMsg(strerror(fcloseErr));
warn("ignoring error writing repl history to %s: %s", historyFile, errMsg);
}
}
AutomationInteracter::Guard AutomationInteracter::init(detail::ReplCompleterMixin *)