Bug #1488: Problems with fopen() and fclose(): segfaults and document contains no data msg

From: fvkuipers@home.com Operating system: Linux RH 5.9 PHP version: 3.0.7 PHP Bug Type: Misbehaving function Bug description: Problems with fopen() and fclose(): segfaults and document contains no data msg Consider the script: <? $fp = fopen("/home/httpd/html/hit.count","w"); echo $fp; /*fclose ($fp);*/ ?> Upon running this program, the code executes as expected by opening the file and allowing file IO. However, the error log reports the following: [Wed Jun 2 21:31:05 1999] [notice] child pid 1557 exit signal Segmentation fault (11) Uncommenting the third line causes a "document contains no data" error. The value of $fp usually 1 as output by the echo statement. In the script in which I noticed this behaviour, the program runs perfectly (except I must exclude the fclose() to avoid the "document contains no data" error). However, doing a tail /var/log/httpd/error_log --follow reveals a seg fault each time the page is reloaded. Hence, it is bloating my logs! The file in question has the following permissions: -rwxrw-rw- 1 webmaste web 0 Jun 2 21:19 hit.count I couldn't produce/locate a coredump, if I do, I will add the backtrace then. I enabled setting $php_errormsg but when I echo it it gives me an "uninitialized variable" notice. What's with that? I am using php3 as a module in Apache. I downloaded both php3 and apache as rpms from the RH distribution sites: mod_php3-3.0.7-4.i386.rpm apache-1.3.6-7.i386.rpm Hence, I have no idea what was compiled in... Any ideas?? Thanks. FK Here is the relavant portion of my php3.ini (excluded all db related content): -----------------8<------------------------------- ;;;;;;;;;;;;;;;;;;;; ; Language Options ; ;;;;;;;;;;;;;;;;;;;; engine = On ; enable PHP 3.0 parser short_open_tag = On ; allow the <? tag. otherwise, only <?php and <script> tags are recognized. asp_tags = On ; allow ASP-style <% %> tags precision = 14 ; number of significant digits displayed in floating point numbers y2k_compliance = Off ; whether to be year 2000 compliant (will cause problems with non y2k compliant browsers) ; Safe Mode safe_mode = Off safe_mode_exec_dir = ; Colors for Syntax Highlighting mode. Anything that's acceptable in <font color=???> would work. highlight.string = #DD0000 highlight.comment = #FF8000 highlight.keyword = #007700 highlight.bg = #FFFFFF highlight.default = #0000BB highlight.html = #000000 ;;;;;;;;;;;;;;;;;;; ; Resource Limits ; ;;;;;;;;;;;;;;;;;;; max_execution_time = 30 ; Maximum execution time of each script, in seconds memory_limit = 8388608 ; Maximum amount of memory a script may consume (8MB) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; Error handling and logging ; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; error_reporting is a bit-field. Add each number up to get desired error reporting level ; 1 = Normal errors ; 2 = Normal warnings ; 4 = Parser errors ; 8 = Notices - warnings you can ignore, but sometimes imply a bug (e.g., using an uninitialized variable) error_reporting = 15 display_errors = On ; Print out errors (as a part of the HTML script) log_errors = On ; Log errors into a log file (server-specific log, stderr, or error_log (below)) track_errors = On ; Store the last error/warning message in $php_errormsg (boolean) ;error_prepend_string = "<font color=ff0000>" ; string to output before an error message ;error_append_string = "</font>" ; string to output after an error message error_log = /var/log/httpd/php3errors.log ; log errors to specified file ;error_log = syslog ; log errors to syslog (Event Log on NT, not valid in Windows 95) warn_plus_overloading = Off ; warn if the + operator is used with strings ;;;;;;;;;;;;;;;;; ; Data Handling ; ;;;;;;;;;;;;;;;;; magic_quotes_gpc = On ; magic quotes for incoming GET/POST/Cookie data magic_quotes_runtime= Off ; magic quotes for runtime-generated data, e.g. data from SQL, from exec(), etc. magic_quotes_sybase = Off ; Use Sybase-style magic quotes (escape ' with '' instead of \') track_vars = On ; enable $HTTP_GET_VARS[], $HTTP_POST_VARS[] and $HTTP_COOKIE_VARS[] arrays ; automatically add files before or after any PHP 3.0 document auto_prepend_file = auto_append_file = ;;;;;;;;;;;;;;;;;;;;;;;;; ; Paths and Directories ; ;;;;;;;;;;;;;;;;;;;;;;;;; include_path = ; UNIX: "/path1:/path2" Windows: "\path1;\path2" doc_root = ; the root of the php pages, used only if nonempty user_dir = ; the directory under which php opens the script using /~username, used only if nonempty ;upload_tmp_dir = ; temporary directory for HTTP uploaded files (will use system default if not specified) upload_max_filesize = 2097152 ; 2 Meg default limit on file uploads extension_dir = ./ ; directory in which the loadable extensions (modules) reside ;;;;;;;;;;;;;;;;;;;;;; ; Dynamic Extensions ; ;;;;;;;;;;;;;;;;;;;;;; ; if you wish to have an extension loaded automaticly, use the ; following syntax: extension=modulename.extension ; for example, on windows, ; extension=msql.dll ; or under UNIX, ; extension=msql.so ; Note that it should be the name of the module only, no directory information ; needs to go here. Specify the location of the extension with the extension_dir directive above. ;Windows Extensions ;extension=php3_mysql.dll ;extension=php3_nsmail.dll ;extension=php3_calendar.dll ;extension=php3_dbase.dll ;extension=php3_gd.dll ;extension=php3_dbm.dll ;extension=php3_mssql.dll ;extension=php3_zlib.dll ;extension=php3_filepro.dll ;extension=php3_imap4r2.dll ;extension=php3_ldap.dll ;extension=php3_crypt.dll ;extension=php3_msql2.dll ;extension=php3_odbc.dll ;;;;;;;;;;;;;;;;;;; ; Module Settings ; ;;;;;;;;;;;;;;;;;;; [Syslog] define_syslog_variables = Off ; Whether or not to define the various syslog variables, ; e.g. $LOG_PID, $LOG_CRON, etc. Turning it off is a ; good idea performance-wise. In runtime, you can define ; these variables by calling define_syslog_variables() --------------8<----------------------------------