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* In printMsg(), ignore failing writes to stderr if we're in an

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exception handler, otherwise throw an exception.  We need to ignore
  write errors in exception handlers to ensure that cleanup code runs
  to completion if the other side of stderr has been closed
  unexpectedly.
This commit is contained in:
Eelco Dolstra 2010-10-04 11:23:07 +00:00
parent 4aa9245083
commit 450837bcc8
1 changed files with 10 additions and 1 deletions
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11
src/libutil/util.cc
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@ -482,7 +482,16 @@ void printMsg_(Verbosity level, const format & f)
else if (logType == ltEscapes && level != lvlInfo)
prefix = "\033[" + escVerbosity(level) + "s";
string s = (format("%1%%2%\n") % prefix % f.str()).str();
writeToStderr((const unsigned char *) s.c_str(), s.size());
try {
writeToStderr((const unsigned char *) s.c_str(), s.size());
} catch (SysError & e) {
/* Ignore failing writes to stderr if we're in an exception
handler, otherwise throw an exception. We need to ignore
write errors in exception handlers to ensure that cleanup
code runs to completion if the other side of stderr has
been closed unexpectedly. */
if (!std::uncaught_exception()) throw;
}
}