use strict;
use parent qw(Exporter);
use Symbol qw(gensym);
+use Fcntl qw(LOCK_EX SEEK_SET);
+use IO::Handle ();
use PublicInbox::ProcessPipe;
our @EXPORT_OK = qw(which spawn popen_rd run_die nodatacow_dir);
our @RLIMITS = qw(RLIMIT_CPU RLIMIT_CORE RLIMIT_DATA);
-my $all_libc = <<'ALL_LIBC'; # all *nix systems we support
+BEGIN {
+ my $all_libc = <<'ALL_LIBC'; # all *nix systems we support
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
+#include <time.h>
+#include <stdio.h>
+#include <string.h>
/* some platforms need alloca.h, but some don't */
#if defined(__GNUC__) && !defined(alloca)
return (int)pid;
}
+static int sleep_wait(unsigned *tries, int err)
+{
+ const struct timespec req = { 0, 100000000 }; /* 100ms */
+ switch (err) {
+ case ENOBUFS: case ENOMEM: case ETOOMANYREFS:
+ if (++*tries < 50) {
+ fprintf(stderr, "sleeping on sendmsg: %s (#%u)\n",
+ strerror(err), *tries);
+ nanosleep(&req, NULL);
+ return 1;
+ }
+ default:
+ return 0;
+ }
+}
+
#if defined(CMSG_SPACE) && defined(CMSG_LEN)
#define SEND_FD_CAPA 10
#define SEND_FD_SPACE (SEND_FD_CAPA * sizeof(int))
AV *fds = (AV *)SvRV(svfds);
I32 i, nfds = av_len(fds) + 1;
int *fdp;
+ unsigned tries = 0;
if (SvOK(data)) {
iov.iov_base = SvPV(data, dlen);
*fdp++ = SvIV(*fd);
}
}
- sent = sendmsg(PerlIO_fileno(s), &msg, flags);
+ do {
+ sent = sendmsg(PerlIO_fileno(s), &msg, flags);
+ } while (sent < 0 && sleep_wait(&tries, errno));
return sent >= 0 ? newSViv(sent) : &PL_sv_undef;
}
# directories. Disabling COW disables checksumming, so we only do this
# for regeneratable files, and not canonical git storage (git doesn't
# checksum refs, only data under $GIT_DIR/objects).
-my $set_nodatacow = $^O eq 'linux' ? <<'SET_NODATACOW' : '';
+ my $set_nodatacow = $^O eq 'linux' ? <<'SET_NODATACOW' : '';
#include <sys/ioctl.h>
#include <sys/vfs.h>
#include <linux/magic.h>
#include <linux/fs.h>
#include <dirent.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
void nodatacow_fd(int fd)
{
}
SET_NODATACOW
-my $inline_dir = $ENV{PERL_INLINE_DIRECTORY} //= (
- $ENV{XDG_CACHE_HOME} //
- ( ($ENV{HOME} // '/nonexistent').'/.cache' )
- ).'/public-inbox/inline-c';
-
-$set_nodatacow = $all_libc = undef unless -d $inline_dir && -w _;
-if (defined $all_libc) {
- # Inline 0.64 or later has locking in multi-process env,
- # but we support 0.5 on Debian wheezy
- use Fcntl qw(:flock);
- eval {
+ my $inline_dir = $ENV{PERL_INLINE_DIRECTORY} //= (
+ $ENV{XDG_CACHE_HOME} //
+ ( ($ENV{HOME} // '/nonexistent').'/.cache' )
+ ).'/public-inbox/inline-c';
+ warn "$inline_dir exists, not writable\n" if -e $inline_dir && !-w _;
+ $set_nodatacow = $all_libc = undef unless -d _ && -w _;
+ if (defined $all_libc) {
my $f = "$inline_dir/.public-inbox.lock";
- open my $fh, '>', $f or die "failed to open $f: $!\n";
- flock($fh, LOCK_EX) or die "LOCK_EX failed on $f: $!\n";
- eval 'use Inline C => $all_libc.$set_nodatacow';
- # . ', BUILD_NOISY => 1';
+ open my $oldout, '>&', \*STDOUT or die "dup(1): $!";
+ open my $olderr, '>&', \*STDERR or die "dup(2): $!";
+ open my $fh, '+>', $f or die "open($f): $!";
+ open STDOUT, '>&', $fh or die "1>$f: $!";
+ open STDERR, '>&', $fh or die "2>$f: $!";
+ STDERR->autoflush(1);
+ STDOUT->autoflush(1);
+
+ # CentOS 7.x ships Inline 0.53, 0.64+ has built-in locking
+ flock($fh, LOCK_EX) or die "LOCK_EX($f): $!";
+ eval <<'EOM';
+use Inline C => $all_libc.$set_nodatacow, BUILD_NOISY => 1;
+EOM
my $err = $@;
- my $ndc_err;
+ my $ndc_err = '';
if ($err && $set_nodatacow) { # missing Linux kernel headers
- $ndc_err = $err;
+ $ndc_err = "with set_nodatacow: <\n$err\n>\n";
undef $set_nodatacow;
- eval 'use Inline C => $all_libc';
+ eval <<'EOM';
+use Inline C => $all_libc, BUILD_NOISY => 1;
+EOM
+ };
+ $err = $@;
+ open(STDERR, '>&', $olderr) or warn "restore stderr: $!";
+ open(STDOUT, '>&', $oldout) or warn "restore stdout: $!";
+ if ($err) {
+ seek($fh, 0, SEEK_SET);
+ my @msg = <$fh>;
+ warn "Inline::C build failed:\n",
+ $ndc_err, $err, "\n", @msg;
+ $set_nodatacow = $all_libc = undef;
+ } elsif ($ndc_err) {
+ warn "Inline::C build succeeded w/o set_nodatacow\n",
+ "error $ndc_err";
}
- flock($fh, LOCK_UN) or die "LOCK_UN failed on $f: $!\n";
- die $err if $err;
- warn $ndc_err if $ndc_err;
- };
- if ($@) {
- warn "Inline::C failed for vfork: $@\n";
- $set_nodatacow = $all_libc = undef;
}
-}
-
-unless ($all_libc) {
- require PublicInbox::SpawnPP;
- *pi_fork_exec = \&PublicInbox::SpawnPP::pi_fork_exec
-}
-unless ($set_nodatacow) {
- require PublicInbox::NDC_PP;
- no warnings 'once';
- *nodatacow_fd = \&PublicInbox::NDC_PP::nodatacow_fd;
- *nodatacow_dir = \&PublicInbox::NDC_PP::nodatacow_dir;
-}
-
-undef $set_nodatacow;
-undef $all_libc;
+ unless ($all_libc) {
+ require PublicInbox::SpawnPP;
+ *pi_fork_exec = \&PublicInbox::SpawnPP::pi_fork_exec
+ }
+ unless ($set_nodatacow) {
+ require PublicInbox::NDC_PP;
+ no warnings 'once';
+ *nodatacow_fd = \&PublicInbox::NDC_PP::nodatacow_fd;
+ *nodatacow_dir = \&PublicInbox::NDC_PP::nodatacow_dir;
+ }
+} # /BEGIN
sub which ($) {
my ($file) = @_;