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* Doh! Don't change the permissions on /nix/store.

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This commit is contained in:
Eelco Dolstra 2007-10-10 13:52:38 +00:00
parent 315183f194
commit d04291cfab
1 changed files with 8 additions and 9 deletions
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17
src/libstore/local-store.cc
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@ -953,17 +953,12 @@ void verifyStore(bool checkContents)
typedef std::map<Hash, std::pair<Path, ino_t> > HashToPath; typedef std::map<Hash, std::pair<Path, ino_t> > HashToPath;
static void toggleWritable(const Path & path, bool writable) static void makeWritable(const Path & path)
{ {
struct stat st; struct stat st;
if (lstat(path.c_str(), &st)) if (lstat(path.c_str(), &st))
throw SysError(format("getting attributes of path `%1%'") % path); throw SysError(format("getting attributes of path `%1%'") % path);
if (chmod(path.c_str(), st.st_mode | S_IWUSR) == -1)
mode_t mode = st.st_mode;
if (writable) mode |= S_IWUSR;
else mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
if (chmod(path.c_str(), mode) == -1)
throw SysError(format("changing writability of `%1%'") % path); throw SysError(format("changing writability of `%1%'") % path);
} }
@ -1023,7 +1018,11 @@ static void hashAndLink(bool dryRun, HashToPath & hashToPath,
Path tempLink = (format("%1%.tmp-%2%-%3%") Path tempLink = (format("%1%.tmp-%2%-%3%")
% path % getpid() % rand()).str(); % path % getpid() % rand()).str();
toggleWritable(dirOf(path), true); /* Make the containing directory writable, but only if
it's not the store itself (we don't want or need to
mess with its permissions). */
bool mustToggle = !isStorePath(path);
if (mustToggle) makeWritable(dirOf(path));
if (link(prevPath.first.c_str(), tempLink.c_str()) == -1) if (link(prevPath.first.c_str(), tempLink.c_str()) == -1)
throw SysError(format("cannot link `%1%' to `%2%'") throw SysError(format("cannot link `%1%' to `%2%'")
@ -1036,7 +1035,7 @@ static void hashAndLink(bool dryRun, HashToPath & hashToPath,
/* Make the directory read-only again and reset its /* Make the directory read-only again and reset its
timestamp back to 0. */ timestamp back to 0. */
_canonicalisePathMetaData(dirOf(path), false); if (mustToggle) _canonicalisePathMetaData(dirOf(path), false);
} else } else
printMsg(lvlTalkative, format("would link `%1%' to `%2%'") % path % prevPath.first); printMsg(lvlTalkative, format("would link `%1%' to `%2%'") % path % prevPath.first);