02-02-2010
Yes, I have heard and used it before with no success. I'm trying to debug a CGI program written in C. It seems to segfault when using getenv. I tried running the program with Firefox and using sleep(30) to make time to attach PID but it still segfaults on this line.
Any ideas ?
PHP Code:
char DOCUMENTROOT[128] = "";
strcat(DOCUMENTROOT, getenv("DOCUMENT_ROOT")); // This line is ok, right ? I mean it is far less than 128 chars long.
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getenv(3) Library Functions Manual getenv(3)
NAME
getenv - Returns the value of an environment variable
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <stdlib.h>
char *getenv(
const char *name);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
getenv(): XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies the name of an environment variable.
DESCRIPTION
The getenv() function searches the environment list for a string of the form name=value, and returns a pointer to a string containing the
corresponding value for name.
The returned string should not be modified by the application, but may be overwritten by a subsequent call to the getenv() or putenv()
functions from the same thread.
RETURN VALUES
The getenv() function returns a pointer to a string containing the value in the current environment if such a string is present. If such a
string is not present, a null pointer is returned.
RELATED INFORMATION
Functions: putenv(3), clearenv(3)
Commands: sh(1)
Standards: standards(5) delim off
getenv(3)