{"id":85,"date":"2011-10-29T14:28:47","date_gmt":"2011-10-29T13:28:47","guid":{"rendered":"\/site\/?p=85"},"modified":"2024-02-23T11:34:21","modified_gmt":"2024-02-23T10:34:21","slug":"perl-internal-server-error-suexec","status":"publish","type":"post","link":"\/site\/2011\/10\/perl-internal-server-error-suexec\/","title":{"rendered":"Perl – Internal Server Error – suexec"},"content":{"rendered":"

Even a simple script gives me this error. Here’s my simple script:
\ncat test.cgi<\/p>\n

#!\/usr\/bin\/perl
\nuse strict;
\nuse warnings;
\nprint “Content-type: text\/plain\\n\\n”;
\nprint “Hello, World”;<\/p><\/blockquote>\n

Lets start with three lines of my logfile:<\/p>\n

suexec failure: could not open log file
\nfopen: No such file or directory
\nPremature end of script headers: test.cgi<\/p><\/blockquote>\n

So, first thing to look at is suexec, apparently it is not able to open it’s logfile. At runtime there is now way to change the settings of suexec. To see the compile-time settings of suexec use:
suexec -V<\/p>\n

-D AP_DOC_ROOT=”\/var\/www”
\n -D AP_GID_MIN=500
\n -D AP_HTTPD_USER=”nobody”
\n -D AP_LOG_EXEC=”\/var\/log\/httpd\/suexec”
\n -D AP_SAFE_PATH=”\/usr\/local\/bin:\/usr\/bin:\/bin”
\n -D AP_UID_MIN=500
\n -D AP_USERDIR_SUFFIX=”public_html”\n<\/p><\/blockquote>\n

It turned out there was no \/var\/log\/httpd directory, so there was nog suexec-log. (No, my setup is not default…) After creating the \/var\/log\/httpd-directory and accessing my test.cgi, the logfile was created, but…<\/p>\n

There appared a line in my apache-logfiles: <\/p>\n

(13)Permission denied: access to \/cgi-bin\/test.cgi denied<\/p><\/blockquote>\n

Luckely a had a suexec-logfile by now, telling me: <\/p>\n

user mismatch (daemon instead of nobody)<\/p><\/blockquote>\n

Meaning: Apache is running as the user daemon, while the default seams to be nobody.
\nSo, at the end I recompiled Apache using: <\/p>\n

CFLAGS= -O3 -march=core2 -pipe -O3 -march=core2 -pipe -O3 \\
        -march=core2 -pipe
\nOPTS= --prefix=\/etc\/httpd --sysconfdir=\/etc\/httpd\/conf --exec-prefix=\/usr --sbindir=\/usr\/sbin --libexecdir=\/usr\/libexec\/httpd\/modules --datadir=\/var\/www --sharedstatedir=\/var\/run\/httpd --localstatedir=\/var --libdir=\/usr\/lib --includedir=\/usr\/include\/httpd --infodir=\/usr\/share\/info --mandir=\/usr\/share\/man --enable-so --enable-rewrite --enable-mime-magic --enable-exception-hook --enable-layout=GNU --enable-usertrack --with-apr=\/usr --with-apr-util=\/usr --with-berkeley-db --with-gdbm --enable-ssl --enable-proxy --enable-proxy-connect --enable-proxy-http --enable-proxy-ftp --enable-suexec --with-suexec --with-suexec-caller=daemon --with-suexec-docroot=\/home --with-suexec-logfile=\/var\/log\/httpd\/suexec --with-suexec-bin=\/usr\/sbin\/suexec --with-suexec-uidmin=500 --with-suexec-gidmin=500 --enable-cgid --with-mpm=prefork<\/font><\/p><\/blockquote>\n

Since my suexec-docroot is somewhere else (not \/var\/www), notice there is a “--with-suexec-docroot=\/home”<\/p>\n

Hope this helps!<\/p>\n","protected":false},"excerpt":{"rendered":"

Even a simple script gives me this error. Here’s my simple script: cat test.cgi #!\/usr\/bin\/perl use strict; use warnings; print “Content-type: text\/plain\\n\\n”; print “Hello, World”; Lets start with three lines of my logfile: suexec failure: could not open log file fopen: No such file or directory Premature end of script headers: test.cgi So, first thing […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"_links":{"self":[{"href":"\/site\/wp-json\/wp\/v2\/posts\/85"}],"collection":[{"href":"\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/site\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/site\/wp-json\/wp\/v2\/comments?post=85"}],"version-history":[{"count":27,"href":"\/site\/wp-json\/wp\/v2\/posts\/85\/revisions"}],"predecessor-version":[{"id":113,"href":"\/site\/wp-json\/wp\/v2\/posts\/85\/revisions\/113"}],"wp:attachment":[{"href":"\/site\/wp-json\/wp\/v2\/media?parent=85"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/site\/wp-json\/wp\/v2\/categories?post=85"},{"taxonomy":"post_tag","embeddable":true,"href":"\/site\/wp-json\/wp\/v2\/tags?post=85"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}