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);
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
+ REDIRECT_URL} if $config{cgi};
my $envsave="";
foreach my $var (@envsave) {
- $envsave.=<<"EOF"
+ $envsave.=<<"EOF";
if ((s=getenv("$var")))
addenv("$var", s);
EOF
}
+ 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
+ # hook is disabled.
+ #
+ # Note that perl's flock may be implemented using fcntl
+ # or lockf on some systems. If so, and if there is no
+ # interop between the locking systems, the true C flock will
+ # always succeed, and this optimisation won't work.
+ # The perl code will later correctly check the lock,
+ # so the right thing will still happen, though without
+ # the benefit of this optimisation.
+ $check_commit_hook=<<"EOF";
+ {
+ int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR, 0666);
+ if (fd != -1) {
+ if (flock(fd, LOCK_SH | LOCK_NB) != 0)
+ exit(0);
+ close(fd);
+ }
+ }
+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 && flock(lockfd, LOCK_EX) == 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']);
$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($wrapper), <<"EOF");
/* A wrapper for ikiwiki, can be safely made suid. */
#include <stdio.h>
#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/file.h>
extern char **environ;
char *newenviron[$#envsave+6];
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");
}
int main (int argc, char **argv) {
- /* Sanitize environment. */
+ int lockfd=-1;
char *s;
+
+$check_commit_hook
+@wrapper_hooks
$envsave
newenviron[i++]="HOME=$ENV{HOME}";
newenviron[i++]="WRAPPED_OPTIONS=$configstring";
- asprintf(&s, "CALLER_UID=%i", getuid());
- newenviron[i++]=s;
+
+#ifdef __TINYC__
+ /* old tcc versions do not support modifying environ directly */
+ if (clearenv() != 0) {
+ perror("clearenv");
+ exit(1);
+ }
+ for (; i>0; i--)
+ putenv(newenviron[i-1]);
+#else
newenviron[i]=NULL;
environ=newenviron;
+#endif
if (setregid(getegid(), -1) != 0 &&
setregid(getegid(), -1) != 0) {
exit(1);
}
+$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"));
}
#translators: The parameter is a filename.
printf(gettext("successfully generated %s"), $wrapper);
print "\n";
-} #}}}
+}
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