X-Git-Url: https://sipb.mit.edu/gitweb.cgi/ikiwiki.git/blobdiff_plain/d3d399941061d95cd4aae6ae2cf7594a4e5e7452..fcce001ca70b79cf94b2ce703ab736c3635c9a3c:/IkiWiki/Wrapper.pm diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm index 99237d3b5..c39aa2ef7 100644 --- a/IkiWiki/Wrapper.pm +++ b/IkiWiki/Wrapper.pm @@ -8,7 +8,27 @@ use File::Spec; use Data::Dumper; use IkiWiki; -sub gen_wrapper () { #{{{ +sub gen_wrappers () { + debug(gettext("generating wrappers..")); + my %origconfig=(%config); + foreach my $wrapper (@{$config{wrappers}}) { + %config=(%origconfig, %{$wrapper}); + $config{verbose}=$config{setupverbose} + if exists $config{setupverbose}; + $config{syslog}=$config{setupsyslog} + if exists $config{setupsyslog}; + delete @config{qw(setupsyslog setupverbose wrappers genwrappers rebuild)}; + checkconfig(); + if (! $config{cgi} && ! $config{post_commit} && + ! $config{test_receive}) { + $config{post_commit}=1; + } + gen_wrapper(); + } + %config=(%origconfig); +} + +sub gen_wrapper () { $config{srcdir}=File::Spec->rel2abs($config{srcdir}); $config{destdir}=File::Spec->rel2abs($config{destdir}); my $this=File::Spec->rel2abs($0); @@ -28,7 +48,9 @@ sub gen_wrapper () { #{{{ my @envsave; push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE - HTTP_COOKIE REMOTE_USER HTTPS} if $config{cgi}; + HTTP_COOKIE REMOTE_USER HTTPS REDIRECT_STATUS + HTTP_HOST SERVER_PORT HTTPS HTTP_ACCEPT + REDIRECT_URL} if $config{cgi}; my $envsave=""; foreach my $var (@envsave) { $envsave.=<<"EOF"; @@ -36,14 +58,12 @@ sub gen_wrapper () { #{{{ addenv("$var", s); EOF } - - my $test_receive=""; - if ($config{test_receive}) { - require IkiWiki::Receive; - $test_receive=IkiWiki::Receive::gen_wrapper(); - } + + my @wrapper_hooks; + run_hooks(genwrapper => sub { push @wrapper_hooks, shift->() }); my $check_commit_hook=""; + my $pre_exec=""; if ($config{post_commit}) { # Optimise checking !commit_hook_enabled() , # so that ikiwiki does not have to be started if the @@ -58,7 +78,7 @@ EOF # the benefit of this optimisation. $check_commit_hook=<<"EOF"; { - int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR); + int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR, 0666); if (fd != -1) { if (flock(fd, LOCK_SH | LOCK_NB) != 0) exit(0); @@ -67,6 +87,29 @@ EOF } EOF } + elsif ($config{cgi}) { + # Avoid more than one ikiwiki cgi running at a time by + # taking a cgi lock. Since ikiwiki uses several MB of + # memory, a pile up of processes could cause thrashing + # otherwise. The fd of the lock is stored in + # IKIWIKI_CGILOCK_FD so unlockwiki can close it. + $pre_exec=<<"EOF"; + lockfd=open("$config{wikistatedir}/cgilock", O_CREAT | O_RDWR, 0666); + if (lockfd != -1 && lockf(lockfd, F_LOCK, 0) == 0) { + char *fd_s=malloc(8); + sprintf(fd_s, "%i", lockfd); + setenv("IKIWIKI_CGILOCK_FD", fd_s, 1); + } +EOF + } + + my $set_background_command=''; + if (defined $config{wrapper_background_command} && + length $config{wrapper_background_command}) { + my $background_command=delete $config{wrapper_background_command}; + $set_background_command=~s/"/\\"/g; + $set_background_command='#define BACKGROUND_COMMAND "'.$background_command.'"'; + } $Data::Dumper::Indent=0; # no newlines my $configstring=Data::Dumper->Dump([\%config], ['*config']); @@ -74,10 +117,7 @@ EOF $configstring=~s/"/\\"/g; $configstring=~s/\n/\\n/g; - #translators: The first parameter is a filename, and the second is - #translators: a (probably not translated) error message. - open(OUT, ">$wrapper.c") || error(sprintf(gettext("failed to write %s: %s"), "$wrapper.c", $!));; - print OUT <<"EOF"; + writefile(basename("$wrapper.c"), dirname($wrapper), <<"EOF"); /* A wrapper for ikiwiki, can be safely made suid. */ #include #include @@ -89,10 +129,10 @@ EOF #include extern char **environ; -char *newenviron[$#envsave+6]; +char *newenviron[$#envsave+7]; int i=0; -addenv(char *var, char *val) { +void addenv(char *var, char *val) { char *s=malloc(strlen(var)+1+strlen(val)+1); if (!s) perror("malloc"); @@ -101,15 +141,28 @@ addenv(char *var, char *val) { } int main (int argc, char **argv) { + int lockfd=-1; char *s; $check_commit_hook -$test_receive +@wrapper_hooks $envsave newenviron[i++]="HOME=$ENV{HOME}"; + newenviron[i++]="PATH=$ENV{PATH}"; newenviron[i++]="WRAPPED_OPTIONS=$configstring"; + +#ifdef __TINYC__ + /* old tcc versions do not support modifying environ directly */ + if (clearenv() != 0) { + perror("clearenv"); + exit(1); + } + for (; i>0; i--) + putenv(newenviron[i-1]); +#else newenviron[i]=NULL; environ=newenviron; +#endif if (setregid(getegid(), -1) != 0 && setregid(getegid(), -1) != 0) { @@ -122,15 +175,47 @@ $envsave exit(1); } +$pre_exec + +$set_background_command +#ifdef BACKGROUND_COMMAND + if (lockfd != -1) { + close(lockfd); + } + + pid_t pid=fork(); + if (pid == -1) { + perror("fork"); + exit(1); + } + else if (pid == 0) { + execl("$this", "$this", NULL); + perror("exec $this"); + exit(1); + } + else { + waitpid(pid, NULL, 0); + + if (daemon(1, 0) == 0) { + system(BACKGROUND_COMMAND); + exit(0); + } + else { + perror("daemon"); + exit(1); + } + } +#else execl("$this", "$this", NULL); perror("exec $this"); exit(1); +#endif } EOF - close OUT; - my $cc=exists $ENV{CC} ? possibly_foolish_untaint($ENV{CC}) : 'cc'; - if (system($cc, "$wrapper.c", "-o", "$wrapper.new") != 0) { + my @cc=exists $ENV{CC} ? possibly_foolish_untaint($ENV{CC}) : 'cc'; + push @cc, possibly_foolish_untaint($ENV{CFLAGS}) if exists $ENV{CFLAGS}; + if (system(@cc, "$wrapper.c", "-o", "$wrapper.new") != 0) { #translators: The parameter is a C filename. error(sprintf(gettext("failed to compile %s"), "$wrapper.c")); } @@ -152,8 +237,7 @@ EOF error("rename $wrapper.new $wrapper: $!"); } #translators: The parameter is a filename. - printf(gettext("successfully generated %s"), $wrapper); - print "\n"; -} #}}} + debug(sprintf(gettext("successfully generated %s"), $wrapper)); +} 1