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Full Discussion: Environment Variables
Operating Systems HP-UX Environment Variables Post 302885350 by angshuman on Saturday 25th of January 2014 05:45:39 AM
Old 01-25-2014
Environment Variables

Hi All,

I need to understand following three environment variables and their usages in HP Unix.

Code:
_M_ARENA_OPTS
_M_CACHE_OPTS
PTHREAD_SCOPE_SYSTEM

How does these environment variables influence multi threaded applciation and how do we decide the value of these variables? Is there any relation between number of threads of the application and the values assigned to the variables?

Thanks
Angshuman
 

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pam_getenvlist(3PAM)					       PAM Library Functions					      pam_getenvlist(3PAM)

NAME
pam_getenvlist - returns a list of all the PAM environment variables SYNOPSIS
cc [ flag ... ] file ... -lpam [ library ... ] #include <security/pam_appl.h> char **pam_getenvlist(pam_handle_t *pamh); DESCRIPTION
The pam_getenvlist() function returns a list of all the PAM environment variables stored in the PAM handle pamh. The list is returned as a null-terminated array of pointers to strings. Each string contains a single PAM environment variable of the form name=value. The list returned is a duplicate copy of all the environment variables stored in pamh. It is the responsibility of the calling application to free the memory returned by pam_getenvlist(). RETURN VALUES
If successful, pam_getenvlist() returns in a null-terminated array a copy of all the PAM environment variables stored in pamh. Otherwise, pam_getenvlist() returns a null pointer. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability | Stable | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe with exceptions | +-----------------------------+-----------------------------+ SEE ALSO
pam(3PAM), pam_getenv(3PAM), pam_putenv(3PAM), libpam(3LIB), attributes(5) NOTES
The interfaces in libpam are MT-Safe only if each thread within the multithreaded application uses its own PAM handle. SunOS 5.11 13 Oct 1998 pam_getenvlist(3PAM)
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