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📖 PAM_GET_DATA(3) — Linux-PAM Manual

🏷️ NAME

pam_get_data — get module internal data

🚀 Quick Reference

Use Case	Command	Description
Retrieve module-specific data	pam_get_data(pamh, "my_data", &data)	🔍 Looks up data associated with a unique string key in the PAM context
Set module-specific data	pam_set_data(pamh, "my_data", data, cleanup)	📦 Stores data for later retrieval by the same module
Check if data exists	pam_get_data returns PAM_NO_MODULE_DATA	❓ Returns this error when no data is found or the entry is NULL

📄 SYNOPSIS

#include <security/pam_modules.h>

int pam_get_data(const pam_handle_t *pamh,
                 const char *module_data_name, const void **data);

📝 DESCRIPTION

This function together with the pam_set_data(3) function is useful to manage module-specific data meaningful only to the calling PAM module.

The pam_get_data function looks up the object associated with the (hopefully) unique string module_data_name in the PAM context specified by the pamh argument. A successful call to pam_get_data will result in data pointing to the object. Note, this data is not a copy and should be treated as constant by the module.

🔙 RETURN VALUES

• PAM_SUCCESS — Data was successfully retrieved.
• PAM_SYSTEM_ERR — A NULL pointer was submitted as PAM handle or the function was called by an application.
• PAM_NO_MODULE_DATA — Module data not found or there is an entry, but it has the value NULL.

📚 SEE ALSO

pam_end(3), pam_set_data(3), pam_strerror(3)

Linux-PAM Manual — 06/08/2020 — PAM_GET_DATA(3)

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📖 PAM_GET_DATA(3) — Linux-PAM Manual 🏷️ NAME 🚀 Quick Reference 📄 SYNOPSIS 📝 DESCRIPTION 🔙 RETURN VALUES 📚 SEE ALSO