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Posted to bugs@httpd.apache.org by bu...@apache.org on 2012/02/29 13:50:53 UTC
DO NOT REPLY [Bug 52795] New: mod_fcgid fails to spawn process in
C:\Program Files
https://issues.apache.org/bugzilla/show_bug.cgi?id=52795
Bug #: 52795
Summary: mod_fcgid fails to spawn process in C:\Program Files
Product: Apache httpd-2
Version: 2.2.17
Platform: PC
Status: NEW
Severity: normal
Priority: P2
Component: mod_fcgid
AssignedTo: bugs@httpd.apache.org
ReportedBy: flw@fotoware.com
Classification: Unclassified
If ScriptAlias contains spaces (such as "C:\Program Files\..."), then mod_fcgid
fails to spawn the process.
In error.log, I see something similar to:
"Can't run C:\Program"
The problem seems to be in fcgid_proc_win.c:proc_spawn_process, which seems to
tokenize the command-line without distinguishing between spaces in the
executable path and spaces between command-line arguments. The following code
is responsible:
/* Build wrapper args */
argc = 0;
tmp = cmdline;
while (1) {
word = ap_getword_white(procnode->proc_pool, &tmp);
if (word == NULL || *word == '\0')
break;
if (argc >= APACHE_ARG_MAX)
break;
wargv[argc++] = word;
}
wargv[argc] = NULL;
The following workaround solves the problem for me. However, it makes it
impossible to pass any additional arguments to the FastCGI process (which is
probably not an issue for most people):
// HACK(flw): Strip all command-line arguments and make the CGI path
the first.
// This works around a problem of the code above which splits the command
name at every whitespace.
argc = 1;
wargv[0] = procinfo->cgipath;
Please note: I am aware of bug#52436. However, I think that is a different
problem, because it occurs on Ubuntu, where fcgid_proc_win.c is not used.
Perhaps, a proper solution is to make it possible to escape spaces or use
quotes in ScriptAlias. The documentation does not state that this is possible,
and the implementation in fcgid_proc_win.c clearly does not support that.
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DO NOT REPLY [Bug 52795] mod_fcgid fails to spawn process in
C:\Program Files
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=52795
William A. Rowe Jr. <wr...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |DUPLICATE
OS/Version| |All
--- Comment #1 from William A. Rowe Jr. <wr...@apache.org> 2012-02-29 18:22:14 UTC ---
This is either duplicating 52436 or shares the same root issue as 51194
*** This bug has been marked as a duplicate of bug 51194 ***
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[Bug 52795] mod_fcgid fails to spawn process in C:\Program Files
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=52795
Florian Winter <fl...@fotoware.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|DUPLICATE |---
--- Comment #3 from Florian Winter <fl...@fotoware.com> ---
This has not been resolved. After upgrading to Apache 2.4.9 and the latest
modules without our own patch applied, the same problem still occurs.
Snippet from httpd.conf:
ScriptAlias /fcgid-bin/ "C:/Program Files (x86)/FotoWare/My Application/"
<Location /fcgid-bin/>
SetHandler fcgid-script
</Location>
Is it necessary to use any special syntax so that ScriptAlias respects the
spaces?
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[Bug 52795] mod_fcgid fails to spawn process in C:\Program Files
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=52795
--- Comment #4 from Florian Winter <fl...@fotoware.com> ---
The problem is still the same. Tokenization of the command-line causes the
executable path to be split. This happens in proc_spawn_process in
fcgid_proc_win.c, except a different tokenization function is used now.
A workaround (which only works if the FCGI script does not take any arguments)
is as follows:
/* Build wrapper args */
// HACK(flw): Whitespace handling is still broken when using ScriptAlias,
so skip tokenization of the command-line
//apr_tokenize_to_argv(cmdline, (char ***)&wargv, procnode->proc_pool);
wargv = apr_palloc(procnode->proc_pool, 2 * sizeof(char*));
wargv[0] = cmdline;
wargv[1] = NULL;
I tried escaping spaces as "\ " in the ScriptAlias and Directory directives in
httpd.conf. This only causes requests to fail with 403 Forbidden. Can it be
that the paths in Directory and ScriptAlias are parsed differently?
There is no official documentation anywhere about how paths with spaces must be
escaped. I tried to learn about it in the code of apr_tokenize_to_argv, but it
is C code cluttered with preprocessor macros and memory allocations, so I gave
up (working with strings in C is hard. I guess that's why it's broken.../rant)
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[Bug 52795] mod_fcgid fails to spawn process in C:\Program Files
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=52795
--- Comment #2 from William A. Rowe Jr. <wr...@apache.org> ---
Verified that this was the same root issue as 51194, see the patch attached to
that ticket. Verified that php script paths and names containing spaces work
correctly with that patch applied.
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