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writeFile(): Add error context to writeFull() failure

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Issue #4092.
This commit is contained in:
Eelco Dolstra 2020-10-09 16:02:53 +02:00
parent 636ec17139
commit 87157b2bd3
1 changed files with 16 additions and 6 deletions
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22
src/libutil/util.cc
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@ -326,7 +326,12 @@ void writeFile(const Path & path, const string & s, mode_t mode)
AutoCloseFD fd = open(path.c_str(), O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC, mode);
if (!fd)
throw SysError("opening file '%1%'", path);
writeFull(fd.get(), s);
try {
writeFull(fd.get(), s);
} catch (Error & e) {
e.addTrace({}, "writing file '%1%'", path);
throw;
}
}
@ -338,11 +343,16 @@ void writeFile(const Path & path, Source & source, mode_t mode)
std::vector<unsigned char> buf(64 * 1024);
while (true) {
try {
auto n = source.read(buf.data(), buf.size());
writeFull(fd.get(), (unsigned char *) buf.data(), n);
} catch (EndOfFile &) { break; }
try {
while (true) {
try {
auto n = source.read(buf.data(), buf.size());
writeFull(fd.get(), (unsigned char *) buf.data(), n);
} catch (EndOfFile &) { break; }
}
} catch (Error & e) {
e.addTrace({}, "writing file '%1%'", path);
throw;
}
}