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[git.ikiwiki.info.git] / IkiWiki / Wrapper.pm

diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index 7b54caf99cd41ea4f38a6c9e1b5619350d70caad..bd134c9a35c2fa87eef5a505e43984bdc26cc1d5 100644 (file)
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -37,12 +37,9 @@ 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="";
@@ -76,27 +73,30 @@ EOF
                # 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);
-               }
+       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($wrapper), <<"EOF");
 /* A wrapper for ikiwiki, can be safely made suid. */
 #include <stdio.h>
 #include <sys/types.h>
@@ -111,7 +111,7 @@ extern char **environ;
 char *newenviron[$#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");
@@ -120,15 +120,27 @@ 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++]="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 +154,46 @@ $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, 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"));
        }