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Remove all the occurences of VLAs

Browse source 
There's generally no strict reason for using them, and they are somewhat
fishy, so let's avoid them.
This commit is contained in:
Théophane Hufschmitt 2022-11-18 13:02:06 +01:00 • committed by Robert Hensing
parent 5196613e82
commit ba3cb4a049
3 changed files with 14 additions and 17 deletions
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9
src/libstore/gc.cc
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@ -330,9 +330,7 @@ typedef std::unordered_map<Path, std::unordered_set<std::string>> UncheckedRoots
static void readProcLink(const std::string & file, UncheckedRoots & roots)
{
/* 64 is the starting buffer size gnu readlink uses... */
auto bufsiz = ssize_t{64};
try_again:
constexpr auto bufsiz = PATH_MAX;
char buf[bufsiz];
auto res = readlink(file.c_str(), buf, bufsiz);
if (res == -1) {
@ -341,10 +339,7 @@ try_again:
throw SysError("reading symlink");
}
if (res == bufsiz) {
if (SSIZE_MAX / 2 < bufsiz)
throw Error("stupidly long symlink");
bufsiz *= 2;
goto try_again;
throw Error("stupidly long symlink");
}
if (res > 0 && buf[0] == '/')
roots[std::string(static_cast<char *>(buf), res)]