X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/9711181a3f7b69b82bc975d6c208f9484e168fbd..2bb5085785d05d5f3fa81b7adcfb8678c7c67ae8:/IkiWiki/Wrapper.pm
diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index 7b54caf99..b46bc6aa9 100644
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -8,10 +8,31 @@ use File::Spec;
use Data::Dumper;
use IkiWiki;
+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);
+}
+
+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));
}
@@ -29,6 +50,7 @@ sub gen_wrapper () {
push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
HTTP_COOKIE REMOTE_USER HTTPS REDIRECT_STATUS
+ HTTP_HOST SERVER_PORT HTTPS HTTP_ACCEPT
REDIRECT_URL} if $config{cgi};
my $envsave="";
foreach my $var (@envsave) {
@@ -37,12 +59,9 @@ sub gen_wrapper () {
addenv("$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="";
@@ -75,28 +94,72 @@ 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.
- $pre_exec=<<"EOF";
- {
- int fd=open("$config{wikistatedir}/cgilock", O_CREAT | O_RDWR, 0666);
- if (fd != -1 && flock(fd, LOCK_EX) == 0) {
- char *fd_s;
- asprintf(&fd_s, "%i", fd);
- setenv("IKIWIKI_CGILOCK_FD", fd_s, 1);
+ #
+ # 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) {
+#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%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
}
+ 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']);
$configstring=~s/\\/\\\\/g;
$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($wrapper), <<"EOF");
/* A wrapper for ikiwiki, can be safely made suid. */
#include
#include
@@ -108,10 +171,10 @@ EOF
#include
extern char **environ;
-char *newenviron[$#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");
@@ -119,16 +182,35 @@ 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;
$check_commit_hook
-$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) {
@@ -142,15 +224,46 @@ $envsave
}
$pre_exec
+
+$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, 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"));
}
@@ -172,8 +285,7 @@ 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