11 sub gen_wrapper () { #{{{
12 $config{srcdir}=File::Spec->rel2abs($config{srcdir});
13 $config{destdir}=File::Spec->rel2abs($config{destdir});
14 my $this=File::Spec->rel2abs($0);
16 error(sprintf(gettext("%s doesn't seem to be executable"), $this));
20 error(gettext("cannot create a wrapper that uses a setup file"));
22 my $wrapper=possibly_foolish_untaint($config{wrapper});
23 if (! defined $wrapper || ! length $wrapper) {
24 error(gettext("wrapper filename not specified"));
26 delete $config{wrapper};
29 push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
30 CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
31 HTTP_COOKIE REMOTE_USER HTTPS} if $config{cgi};
33 foreach my $var (@envsave) {
35 if ((s=getenv("$var")))
41 if ($config{test_receive}) {
42 require IkiWiki::Receive;
43 $test_receive=IkiWiki::Receive::gen_wrapper();
46 my $check_commit_hook="";
48 if ($config{post_commit}) {
49 # Optimise checking !commit_hook_enabled() ,
50 # so that ikiwiki does not have to be started if the
53 # Note that perl's flock may be implemented using fcntl
54 # or lockf on some systems. If so, and if there is no
55 # interop between the locking systems, the true C flock will
56 # always succeed, and this optimisation won't work.
57 # The perl code will later correctly check the lock,
58 # so the right thing will still happen, though without
59 # the benefit of this optimisation.
60 $check_commit_hook=<<"EOF";
62 int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR, 0666);
64 if (flock(fd, LOCK_SH | LOCK_NB) != 0)
71 elsif ($config{cgi}) {
72 # Avoid more than one ikiwiki cgi running at a time by
73 # taking a cgi lock. Since ikiwiki uses several MB of
74 # memory, a pile up of processes could cause thrashing
75 # otherwise. The fd of the lock is stored in
76 # IKIWIKI_CGILOCK_FD so unlockwiki can close it.
79 int fd=open("$config{wikistatedir}/cgilock", O_CREAT | O_RDWR, 0666);
80 if (fd != -1 && flock(fd, LOCK_EX) == 0) {
82 asprintf(&fd_s, "%i", fd);
83 setenv("IKIWIKI_CGILOCK_FD", fd_s, 1);
89 $Data::Dumper::Indent=0; # no newlines
90 my $configstring=Data::Dumper->Dump([\%config], ['*config']);
91 $configstring=~s/\\/\\\\/g;
92 $configstring=~s/"/\\"/g;
93 $configstring=~s/\n/\\n/g;
95 #translators: The first parameter is a filename, and the second is
96 #translators: a (probably not translated) error message.
97 open(OUT, ">$wrapper.c") || error(sprintf(gettext("failed to write %s: %s"), "$wrapper.c", $!));;
99 /* A wrapper for ikiwiki, can be safely made suid. */
101 #include <sys/types.h>
102 #include <sys/stat.h>
107 #include <sys/file.h>
109 extern char **environ;
110 char *newenviron[$#envsave+6];
113 addenv(char *var, char *val) {
114 char *s=malloc(strlen(var)+1+strlen(val)+1);
117 sprintf(s, "%s=%s", var, val);
121 int main (int argc, char **argv) {
127 newenviron[i++]="HOME=$ENV{HOME}";
128 newenviron[i++]="WRAPPED_OPTIONS=$configstring";
132 if (setregid(getegid(), -1) != 0 &&
133 setregid(getegid(), -1) != 0) {
134 perror("failed to drop real gid");
137 if (setreuid(geteuid(), -1) != 0 &&
138 setreuid(geteuid(), -1) != 0) {
139 perror("failed to drop real uid");
144 execl("$this", "$this", NULL);
145 perror("exec $this");
151 my $cc=exists $ENV{CC} ? possibly_foolish_untaint($ENV{CC}) : 'cc';
152 if (system($cc, "$wrapper.c", "-o", "$wrapper.new") != 0) {
153 #translators: The parameter is a C filename.
154 error(sprintf(gettext("failed to compile %s"), "$wrapper.c"));
156 unlink("$wrapper.c");
157 if (defined $config{wrappergroup}) {
158 my $gid=(getgrnam($config{wrappergroup}))[2];
159 if (! defined $gid) {
160 error(sprintf("bad wrappergroup"));
162 if (! chown(-1, $gid, "$wrapper.new")) {
163 error("chown $wrapper.new: $!");
166 if (defined $config{wrappermode} &&
167 ! chmod(oct($config{wrappermode}), "$wrapper.new")) {
168 error("chmod $wrapper.new: $!");
170 if (! rename("$wrapper.new", $wrapper)) {
171 error("rename $wrapper.new $wrapper: $!");
173 #translators: The parameter is a filename.
174 printf(gettext("successfully generated %s"), $wrapper);