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* Allow read-only access to the store (e.g., non-root users on NixOS

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can do operations like "nix-store -qR <path>" even without the Nix
  daemon).
This commit is contained in:
Eelco Dolstra 2008-07-18 15:34:46 +00:00
parent 8bc591a6f0
commit 989176c56e
2 changed files with 11 additions and 6 deletions
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3
scripts/download-using-manifests.pl.in
View file

@ -8,7 +8,6 @@ use File::Temp qw(tempdir);
my $manifestDir = "@localstatedir@/nix/manifests";
my $logFile = "@localstatedir@/log/nix/downloads";
open LOGFILE, ">>$logFile" or die "cannot open log file $logFile";
# Create a temporary directory.
my $tmpDir = tempdir("nix-download.XXXXXX", CLEANUP => 1, TMPDIR => 1)
@ -76,6 +75,8 @@ die unless scalar @ARGV == 2;
my $targetPath = $ARGV[1];
open LOGFILE, ">>$logFile" or die "cannot open log file $logFile";
my $date = strftime ("%F %H:%M:%S UTC", gmtime (time));
print LOGFILE "$$ get $targetPath $date\n";

14
src/libstore/local-store.cc
View file

@ -15,6 +15,7 @@
#include <unistd.h>
#include <utime.h>
#include <fcntl.h>
#include <errno.h>
namespace nix {
@ -48,8 +49,14 @@ LocalStore::LocalStore()
checkStoreNotSymlink();
Path globalLockPath = nixDBPath + "/big-lock";
globalLock = openLockFile(globalLockPath.c_str(), true);
try {
Path globalLockPath = nixDBPath + "/big-lock";
globalLock = openLockFile(globalLockPath.c_str(), true);
} catch (SysError & e) {
if (e.errNo != EACCES) throw;
readOnlyMode = true;
return;
}
if (!lockFile(globalLock, ltRead, false)) {
printMsg(lvlError, "waiting for the big Nix store lock...");
@ -59,9 +66,6 @@ LocalStore::LocalStore()
createDirs(nixDBPath + "/info");
createDirs(nixDBPath + "/referrer");
//printMsg(lvlTalkative, "cannot access Nix database; continuing anyway");
//readOnlyMode = true;
int curSchema = getSchema();
if (curSchema > nixSchemaVersion)
throw Error(format("current Nix store schema is version %1%, but I only support %2%")