X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/6d01db205f41f16755fe7fbe49694b3bba2121c8..154c4ea9e:/IkiWiki/Wrapper.pm?ds=sidebyside diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm index d39a3ea40..b46bc6aa9 100644 --- a/IkiWiki/Wrapper.pm +++ b/IkiWiki/Wrapper.pm @@ -28,10 +28,11 @@ sub gen_wrappers () { %config=(%origconfig); } +our $program_to_wrap = $0; sub gen_wrapper () { $config{srcdir}=File::Spec->rel2abs($config{srcdir}); $config{destdir}=File::Spec->rel2abs($config{destdir}); - my $this=File::Spec->rel2abs($0); + my $this=File::Spec->rel2abs($program_to_wrap); if (! -x $this) { error(sprintf(gettext("%s doesn't seem to be executable"), $this)); } @@ -93,12 +94,53 @@ EOF # 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"; + # + # A lot of cgi wrapper processes can potentially build + # up and clog an otherwise unloaded web server. To + # partially avoid this, when a GET comes in and the lock + # is already held, rather than blocking a html page is + # constructed that retries. This is enabled by setting + # cgi_overload_delay. + if (defined $config{cgi_overload_delay} && + $config{cgi_overload_delay} =~/^[0-9]+/) { + my $i=int($config{cgi_overload_delay}); + $pre_exec.="#define CGI_OVERLOAD_DELAY $i\n" + if $i > 0; + my $msg=gettext("Please wait"); + $msg=~s/"/\\"/g; + $pre_exec.='#define CGI_PLEASE_WAIT_TITLE "'.$msg."\"\n"; + if (defined $config{cgi_overload_message} && length $config{cgi_overload_message}) { + $msg=$config{cgi_overload_message}; + $msg=~s/"/\\"/g; + } + $pre_exec.='#define CGI_PLEASE_WAIT_BODY "'.$msg."\"\n"; + } + $pre_exec.=<<"EOF"; lockfd=open("$config{wikistatedir}/cgilock", O_CREAT | O_RDWR, 0666); - if (lockfd != -1 && flock(lockfd, LOCK_EX) == 0) { - char *fd_s=malloc(8); - sprintf(fd_s, "%i", lockfd); - setenv("IKIWIKI_CGILOCK_FD", fd_s, 1); + if (lockfd != -1) { +#ifdef CGI_OVERLOAD_DELAY + char *request_method = getenv("REQUEST_METHOD"); + if (request_method && strcmp(request_method, "GET") == 0) { + if (lockf(lockfd, F_TLOCK, 0) == 0) { + set_cgilock_fd(lockfd); + } + else { + printf("Content-Type: text/html\\nRefresh: %i; URL=%s\\n\\n
%s
", + CGI_OVERLOAD_DELAY, + getenv("REQUEST_URI"), + CGI_PLEASE_WAIT_TITLE, + CGI_PLEASE_WAIT_BODY); + exit(0); + } + } + else if (lockf(lockfd, F_LOCK, 0) == 0) { + set_cgilock_fd(lockfd); + } +#else + if (lockf(lockfd, F_LOCK, 0) == 0) { + set_cgilock_fd(lockfd); + } +#endif } EOF } @@ -140,6 +182,12 @@ void addenv(char *var, char *val) { newenviron[i++]=s; } +void set_cgilock_fd (int lockfd) { + char *fd_s=malloc(8); + sprintf(fd_s, "%i", lockfd); + setenv("IKIWIKI_CGILOCK_FD", fd_s, 1); +} + int main (int argc, char **argv) { int lockfd=-1; char *s; @@ -214,7 +262,7 @@ $set_background_command EOF my @cc=exists $ENV{CC} ? possibly_foolish_untaint($ENV{CC}) : 'cc'; - push @cc, possibly_foolish_untaint($ENV{CFLAGS}) if exists $ENV{CFLAGS}; + push @cc, split(' ', possibly_foolish_untaint($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"));