pam_putenv (3) - Linux Man Pages
pam_putenv: set or change PAM environment variable
pam_putenv - set or change PAM environment variable
*pamh, const char *name_value);
The pamh argument is an authentication handle obtained by a prior call to pam_start(). The name_value argument is a single NUL terminated string of one of the following forms:
NAME=value of variable
- In this case the environment variable of the given NAME is set to the indicated value: value of variable. If this variable is already known, it is overwritten. Otherwise it is added to the PAM environment.
- This function sets the variable to an empty value. It is listed separately to indicate that this is the correct way to achieve such a setting.
- Without an '=' the pam_putenv() function will delete the corresponding variable from the PAM environment.
pam_putenv() operates on a copy of name_value, which means in contrast to putenv(3), the application is responsible to free the data.
- Argument name_value given is a NULL pointer.
- Variable requested (for deletion) is not currently set.
- The pamh handle is corrupt.
- Memory buffer error.
- The environment variable was successfully updated.