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#ifndef _SEPOL_POLICYDB_H_ #define _SEPOL_POLICYDB_H_ #include <stddef.h> #include <stdio.h> #include <sepol/handle.h> #include <sys/cdefs.h> __BEGIN_DECLS struct sepol_policy_file; typedef struct sepol_policy_file sepol_policy_file_t; struct sepol_policydb; typedef struct sepol_policydb sepol_policydb_t; /* Policy file public interfaces. */ /* Create and free memory associated with a policy file. */ extern int sepol_policy_file_create(sepol_policy_file_t ** pf); extern void sepol_policy_file_free(sepol_policy_file_t * pf); /* * Set the policy file to represent a binary policy memory image. * Subsequent operations using the policy file will read and write * the image located at the specified address with the specified length. * If 'len' is 0, then merely compute the necessary length upon * subsequent policydb write operations in order to determine the * necessary buffer size to allocate. */ extern void sepol_policy_file_set_mem(sepol_policy_file_t * pf, char *data, size_t len); /* * Get the size of the buffer needed to store a policydb write * previously done on this policy file. */ extern int sepol_policy_file_get_len(sepol_policy_file_t * pf, size_t * len); /* * Set the policy file to represent a FILE. * Subsequent operations using the policy file will read and write * to the FILE. */ extern void sepol_policy_file_set_fp(sepol_policy_file_t * pf, FILE * fp); /* * Associate a handle with a policy file, for use in * error reporting from subsequent calls that take the * policy file as an argument. */ extern void sepol_policy_file_set_handle(sepol_policy_file_t * pf, sepol_handle_t * handle); /* Policydb public interfaces. */ /* Create and free memory associated with a policydb. */ extern int sepol_policydb_create(sepol_policydb_t ** p); extern void sepol_policydb_free(sepol_policydb_t * p); /* Legal types of policies that the policydb can represent. */ #define SEPOL_POLICY_KERN 0 #define SEPOL_POLICY_BASE 1 #define SEPOL_POLICY_MOD 2 /* * Range of policy versions for the kernel policy type supported * by this library. */ extern int sepol_policy_kern_vers_min(void); extern int sepol_policy_kern_vers_max(void); /* * Set the policy type as specified, and automatically initialize the * policy version accordingly to the maximum version supported for the * policy type. * Returns -1 if the policy type is not legal. */ extern int sepol_policydb_set_typevers(sepol_policydb_t * p, unsigned int type); /* * Set the policy version to a different value. * Returns -1 if the policy version is not in the supported range for * the (previously set) policy type. */ extern int sepol_policydb_set_vers(sepol_policydb_t * p, unsigned int vers); /* Set how to handle unknown class/perms. */ #define SEPOL_DENY_UNKNOWN 0 #define SEPOL_REJECT_UNKNOWN 2 #define SEPOL_ALLOW_UNKNOWN 4 extern int sepol_policydb_set_handle_unknown(sepol_policydb_t * p, unsigned int handle_unknown); /* Set the target platform */ #define SEPOL_TARGET_SELINUX 0 #define SEPOL_TARGET_XEN 1 extern int sepol_policydb_set_target_platform(sepol_policydb_t * p, int target_platform); /* * Read a policydb from a policy file. * This automatically sets the type and version based on the * image contents. */ extern int sepol_policydb_read(sepol_policydb_t * p, sepol_policy_file_t * pf); /* * Write a policydb to a policy file. * The generated image will be in the binary format corresponding * to the policy version associated with the policydb. */ extern int sepol_policydb_write(sepol_policydb_t * p, sepol_policy_file_t * pf); /* * Extract a policydb from a binary policy memory image. * This is equivalent to sepol_policydb_read with a policy file * set to refer to memory. */ extern int sepol_policydb_from_image(sepol_handle_t * handle, void *data, size_t len, sepol_policydb_t * p); /* * Generate a binary policy memory image from a policydb. * This is equivalent to sepol_policydb_write with a policy file * set to refer to memory, but internally handles computing the * necessary length and allocating an appropriately sized memory * buffer for the caller. */ extern int sepol_policydb_to_image(sepol_handle_t * handle, sepol_policydb_t * p, void **newdata, size_t * newlen); /* * Check whether the policydb has MLS enabled. */ extern int sepol_policydb_mls_enabled(const sepol_policydb_t * p); /* * Check whether the compatibility mode for SELinux network * checks should be enabled when using this policy. */ extern int sepol_policydb_compat_net(const sepol_policydb_t * p); __END_DECLS #endif

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