/** * Seccomp Library * * Copyright (c) 2019 Cisco Systems * Copyright (c) 2012,2013 Red Hat * Author: Paul Moore */ /* * This library is free software; you can redistribute it and/or modify it * under the terms of version 2.1 of the GNU Lesser General Public License as * published by the Free Software Foundation. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License * for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, see . */ #ifndef _SECCOMP_H #define _SECCOMP_H #include #include #include #include #include #include #ifdef __cplusplus extern "C" { #endif /* * version information */ #define SCMP_VER_MAJOR 2 #define SCMP_VER_MINOR 5 #define SCMP_VER_MICRO 4 struct scmp_version { unsigned int major; unsigned int minor; unsigned int micro; }; /* * types */ /** * Filter context/handle */ typedef void *scmp_filter_ctx; /** * Filter attributes */ enum scmp_filter_attr { _SCMP_FLTATR_MIN = 0, SCMP_FLTATR_ACT_DEFAULT = 1, /**< default filter action */ SCMP_FLTATR_ACT_BADARCH = 2, /**< bad architecture action */ SCMP_FLTATR_CTL_NNP = 3, /**< set NO_NEW_PRIVS on filter load */ SCMP_FLTATR_CTL_TSYNC = 4, /**< sync threads on filter load */ SCMP_FLTATR_API_TSKIP = 5, /**< allow rules with a -1 syscall */ SCMP_FLTATR_CTL_LOG = 6, /**< log not-allowed actions */ SCMP_FLTATR_CTL_SSB = 7, /**< disable SSB mitigation */ SCMP_FLTATR_CTL_OPTIMIZE = 8, /**< filter optimization level: * 0 - currently unused * 1 - rules weighted by priority and * complexity (DEFAULT) * 2 - binary tree sorted by syscall * number */ SCMP_FLTATR_API_SYSRAWRC = 9, /**< return the system return codes */ _SCMP_FLTATR_MAX, }; /** * Comparison operators */ enum scmp_compare { _SCMP_CMP_MIN = 0, SCMP_CMP_NE = 1, /**< not equal */ SCMP_CMP_LT = 2, /**< less than */ SCMP_CMP_LE = 3, /**< less than or equal */ SCMP_CMP_EQ = 4, /**< equal */ SCMP_CMP_GE = 5, /**< greater than or equal */ SCMP_CMP_GT = 6, /**< greater than */ SCMP_CMP_MASKED_EQ = 7, /**< masked equality */ _SCMP_CMP_MAX, }; /** * Argument datum */ typedef uint64_t scmp_datum_t; /** * Argument / Value comparison definition */ struct scmp_arg_cmp { unsigned int arg; /**< argument number, starting at 0 */ enum scmp_compare op; /**< the comparison op, e.g. SCMP_CMP_* */ scmp_datum_t datum_a; scmp_datum_t datum_b; }; /* * macros/defines */ /** * The native architecture token */ #define SCMP_ARCH_NATIVE 0 /** * The x86 (32-bit) architecture token */ #define SCMP_ARCH_X86 AUDIT_ARCH_I386 /** * The x86-64 (64-bit) architecture token */ #define SCMP_ARCH_X86_64 AUDIT_ARCH_X86_64 /** * The x32 (32-bit x86_64) architecture token * * NOTE: this is different from the value used by the kernel because we need to * be able to distinguish between x32 and x86_64 */ #define SCMP_ARCH_X32 (EM_X86_64|__AUDIT_ARCH_LE) /** * The ARM architecture tokens */ #define SCMP_ARCH_ARM AUDIT_ARCH_ARM /* AArch64 support for audit was merged in 3.17-rc1 */ #ifndef AUDIT_ARCH_AARCH64 #ifndef EM_AARCH64 #define EM_AARCH64 183 #endif /* EM_AARCH64 */ #define AUDIT_ARCH_AARCH64 (EM_AARCH64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) #endif /* AUDIT_ARCH_AARCH64 */ #define SCMP_ARCH_AARCH64 AUDIT_ARCH_AARCH64 /** * The MIPS architecture tokens */ #ifndef __AUDIT_ARCH_CONVENTION_MIPS64_N32 #define __AUDIT_ARCH_CONVENTION_MIPS64_N32 0x20000000 #endif #ifndef EM_MIPS #define EM_MIPS 8 #endif #ifndef AUDIT_ARCH_MIPS #define AUDIT_ARCH_MIPS (EM_MIPS) #endif #ifndef AUDIT_ARCH_MIPS64 #define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT) #endif /* MIPS64N32 support was merged in 3.15 */ #ifndef AUDIT_ARCH_MIPS64N32 #define AUDIT_ARCH_MIPS64N32 (EM_MIPS|__AUDIT_ARCH_64BIT|\ __AUDIT_ARCH_CONVENTION_MIPS64_N32) #endif /* MIPSEL64N32 support was merged in 3.15 */ #ifndef AUDIT_ARCH_MIPSEL64N32 #define AUDIT_ARCH_MIPSEL64N32 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE|\ __AUDIT_ARCH_CONVENTION_MIPS64_N32) #endif #define SCMP_ARCH_MIPS AUDIT_ARCH_MIPS #define SCMP_ARCH_MIPS64 AUDIT_ARCH_MIPS64 #define SCMP_ARCH_MIPS64N32 AUDIT_ARCH_MIPS64N32 #define SCMP_ARCH_MIPSEL AUDIT_ARCH_MIPSEL #define SCMP_ARCH_MIPSEL64 AUDIT_ARCH_MIPSEL64 #define SCMP_ARCH_MIPSEL64N32 AUDIT_ARCH_MIPSEL64N32 /** * The PowerPC architecture tokens */ #define SCMP_ARCH_PPC AUDIT_ARCH_PPC #define SCMP_ARCH_PPC64 AUDIT_ARCH_PPC64 #ifndef AUDIT_ARCH_PPC64LE #define AUDIT_ARCH_PPC64LE (EM_PPC64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) #endif #define SCMP_ARCH_PPC64LE AUDIT_ARCH_PPC64LE /** * The S390 architecture tokens */ #define SCMP_ARCH_S390 AUDIT_ARCH_S390 #define SCMP_ARCH_S390X AUDIT_ARCH_S390X /** * The PA-RISC hppa architecture tokens */ #define SCMP_ARCH_PARISC AUDIT_ARCH_PARISC #define SCMP_ARCH_PARISC64 AUDIT_ARCH_PARISC64 /** * The RISC-V architecture tokens */ /* RISC-V support for audit was merged in 5.0-rc1 */ #ifndef AUDIT_ARCH_RISCV64 #ifndef EM_RISCV #define EM_RISCV 243 #endif /* EM_RISCV */ #define AUDIT_ARCH_RISCV64 (EM_RISCV|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) #endif /* AUDIT_ARCH_RISCV64 */ #define SCMP_ARCH_RISCV64 AUDIT_ARCH_RISCV64 /** * Convert a syscall name into the associated syscall number * @param x the syscall name */ #define SCMP_SYS(x) (__SNR_##x) /* Helpers for the argument comparison macros, DO NOT USE directly */ #define _SCMP_VA_NUM_ARGS(...) _SCMP_VA_NUM_ARGS_IMPL(__VA_ARGS__,2,1) #define _SCMP_VA_NUM_ARGS_IMPL(_1,_2,N,...) N #define _SCMP_MACRO_DISPATCHER(func, ...) \ _SCMP_MACRO_DISPATCHER_IMPL1(func, _SCMP_VA_NUM_ARGS(__VA_ARGS__)) #define _SCMP_MACRO_DISPATCHER_IMPL1(func, nargs) \ _SCMP_MACRO_DISPATCHER_IMPL2(func, nargs) #define _SCMP_MACRO_DISPATCHER_IMPL2(func, nargs) \ func ## nargs #define _SCMP_CMP32_1(x, y, z) \ SCMP_CMP64(x, y, (uint32_t)(z)) #define _SCMP_CMP32_2(x, y, z, q) \ SCMP_CMP64(x, y, (uint32_t)(z), (uint32_t)(q)) /** * Specify a 64-bit argument comparison struct for use in declaring rules * @param arg the argument number, starting at 0 * @param op the comparison operator, e.g. SCMP_CMP_* * @param datum_a dependent on comparison * @param datum_b dependent on comparison, optional */ #define SCMP_CMP64(...) ((struct scmp_arg_cmp){__VA_ARGS__}) #define SCMP_CMP SCMP_CMP64 /** * Specify a 32-bit argument comparison struct for use in declaring rules * @param arg the argument number, starting at 0 * @param op the comparison operator, e.g. SCMP_CMP_* * @param datum_a dependent on comparison (32-bits) * @param datum_b dependent on comparison, optional (32-bits) */ #define SCMP_CMP32(x, y, ...) \ _SCMP_MACRO_DISPATCHER(_SCMP_CMP32_, __VA_ARGS__)(x, y, __VA_ARGS__) /** * Specify a 64-bit argument comparison struct for argument 0 */ #define SCMP_A0_64(...) SCMP_CMP64(0, __VA_ARGS__) #define SCMP_A0 SCMP_A0_64 /** * Specify a 32-bit argument comparison struct for argument 0 */ #define SCMP_A0_32(x, ...) SCMP_CMP32(0, x, __VA_ARGS__) /** * Specify a 64-bit argument comparison struct for argument 1 */ #define SCMP_A1_64(...) SCMP_CMP64(1, __VA_ARGS__) #define SCMP_A1 SCMP_A1_64 /** * Specify a 32-bit argument comparison struct for argument 1 */ #define SCMP_A1_32(x, ...) SCMP_CMP32(1, x, __VA_ARGS__) /** * Specify a 64-bit argument comparison struct for argument 2 */ #define SCMP_A2_64(...) SCMP_CMP64(2, __VA_ARGS__) #define SCMP_A2 SCMP_A2_64 /** * Specify a 32-bit argument comparison struct for argument 2 */ #define SCMP_A2_32(x, ...) SCMP_CMP32(2, x, __VA_ARGS__) /** * Specify a 64-bit argument comparison struct for argument 3 */ #define SCMP_A3_64(...) SCMP_CMP64(3, __VA_ARGS__) #define SCMP_A3 SCMP_A3_64 /** * Specify a 32-bit argument comparison struct for argument 3 */ #define SCMP_A3_32(x, ...) SCMP_CMP32(3, x, __VA_ARGS__) /** * Specify a 64-bit argument comparison struct for argument 4 */ #define SCMP_A4_64(...) SCMP_CMP64(4, __VA_ARGS__) #define SCMP_A4 SCMP_A4_64 /** * Specify a 32-bit argument comparison struct for argument 4 */ #define SCMP_A4_32(x, ...) SCMP_CMP32(4, x, __VA_ARGS__) /** * Specify a 64-bit argument comparison struct for argument 5 */ #define SCMP_A5_64(...) SCMP_CMP64(5, __VA_ARGS__) #define SCMP_A5 SCMP_A5_64 /** * Specify a 32-bit argument comparison struct for argument 5 */ #define SCMP_A5_32(x, ...) SCMP_CMP32(5, x, __VA_ARGS__) /* * seccomp actions */ /** * Kill the process */ #define SCMP_ACT_KILL_PROCESS 0x80000000U /** * Kill the thread */ #define SCMP_ACT_KILL_THREAD 0x00000000U /** * Kill the thread, defined for backward compatibility */ #define SCMP_ACT_KILL SCMP_ACT_KILL_THREAD /** * Throw a SIGSYS signal */ #define SCMP_ACT_TRAP 0x00030000U /** * Notifies userspace */ #define SCMP_ACT_NOTIFY 0x7fc00000U /** * Return the specified error code */ #define SCMP_ACT_ERRNO(x) (0x00050000U | ((x) & 0x0000ffffU)) /** * Notify a tracing process with the specified value */ #define SCMP_ACT_TRACE(x) (0x7ff00000U | ((x) & 0x0000ffffU)) /** * Allow the syscall to be executed after the action has been logged */ #define SCMP_ACT_LOG 0x7ffc0000U /** * Allow the syscall to be executed */ #define SCMP_ACT_ALLOW 0x7fff0000U /* SECCOMP_RET_USER_NOTIF was added in kernel v5.0. */ #ifndef SECCOMP_RET_USER_NOTIF #define SECCOMP_RET_USER_NOTIF 0x7fc00000U struct seccomp_notif { __u64 id; __u32 pid; __u32 flags; struct seccomp_data data; }; struct seccomp_notif_resp { __u64 id; __s64 val; __s32 error; __u32 flags; }; #endif /* * functions */ /** * Query the library version information * * This function returns a pointer to a populated scmp_version struct, the * caller does not need to free the structure when finished. * */ const struct scmp_version *seccomp_version(void); /** * Query the library's level of API support * * This function returns an API level value indicating the current supported * functionality. It is important to note that this level of support is * determined at runtime and therefore can change based on the running kernel * and system configuration (e.g. any previously loaded seccomp filters). This * function can be called multiple times, but it only queries the system the * first time it is called, the API level is cached and used in subsequent * calls. * * The current API levels are described below: * 0 : reserved * 1 : base level * 2 : support for the SCMP_FLTATR_CTL_TSYNC filter attribute * uses the seccomp(2) syscall instead of the prctl(2) syscall * 3 : support for the SCMP_FLTATR_CTL_LOG filter attribute * support for the SCMP_ACT_LOG action * support for the SCMP_ACT_KILL_PROCESS action * 4 : support for the SCMP_FLTATR_CTL_SSB filter attrbute * 5 : support for the SCMP_ACT_NOTIFY action and notify APIs * 6 : support the simultaneous use of SCMP_FLTATR_CTL_TSYNC and notify APIs * */ unsigned int seccomp_api_get(void); /** * Set the library's level of API support * * This function forcibly sets the API level of the library at runtime. Valid * API levels are discussed in the description of the seccomp_api_get() * function. General use of this function is strongly discouraged. * */ int seccomp_api_set(unsigned int level); /** * Initialize the filter state * @param def_action the default filter action * * This function initializes the internal seccomp filter state and should * be called before any other functions in this library to ensure the filter * state is initialized. Returns a filter context on success, NULL on failure. * */ scmp_filter_ctx seccomp_init(uint32_t def_action); /** * Reset the filter state * @param ctx the filter context * @param def_action the default filter action * * This function resets the given seccomp filter state and ensures the * filter state is reinitialized. This function does not reset any seccomp * filters already loaded into the kernel. Returns zero on success, negative * values on failure. * */ int seccomp_reset(scmp_filter_ctx ctx, uint32_t def_action); /** * Destroys the filter state and releases any resources * @param ctx the filter context * * This functions destroys the given seccomp filter state and releases any * resources, including memory, associated with the filter state. This * function does not reset any seccomp filters already loaded into the kernel. * The filter context can no longer be used after calling this function. * */ void seccomp_release(scmp_filter_ctx ctx); /** * Merge two filters * @param ctx_dst the destination filter context * @param ctx_src the source filter context * * This function merges two filter contexts into a single filter context and * destroys the second filter context. The two filter contexts must have the * same attribute values and not contain any of the same architectures; if they * do, the merge operation will fail. On success, the source filter context * will be destroyed and should no longer be used; it is not necessary to * call seccomp_release() on the source filter context. Returns zero on * success, negative values on failure. * */ int seccomp_merge(scmp_filter_ctx ctx_dst, scmp_filter_ctx ctx_src); /** * Resolve the architecture name to a architecture token * @param arch_name the architecture name * * This function resolves the given architecture name to a token suitable for * use with libseccomp, returns zero on failure. * */ uint32_t seccomp_arch_resolve_name(const char *arch_name); /** * Return the native architecture token * * This function returns the native architecture token value, e.g. SCMP_ARCH_*. * */ uint32_t seccomp_arch_native(void); /** * Check to see if an existing architecture is present in the filter * @param ctx the filter context * @param arch_token the architecture token, e.g. SCMP_ARCH_* * * This function tests to see if a given architecture is included in the filter * context. If the architecture token is SCMP_ARCH_NATIVE then the native * architecture will be assumed. Returns zero if the architecture exists in * the filter, -EEXIST if it is not present, and other negative values on * failure. * */ int seccomp_arch_exist(const scmp_filter_ctx ctx, uint32_t arch_token); /** * Adds an architecture to the filter * @param ctx the filter context * @param arch_token the architecture token, e.g. SCMP_ARCH_* * * This function adds a new architecture to the given seccomp filter context. * Any new rules added after this function successfully returns will be added * to this architecture but existing rules will not be added to this * architecture. If the architecture token is SCMP_ARCH_NATIVE then the native * architecture will be assumed. Returns zero on success, -EEXIST if * specified architecture is already present, other negative values on failure. * */ int seccomp_arch_add(scmp_filter_ctx ctx, uint32_t arch_token); /** * Removes an architecture from the filter * @param ctx the filter context * @param arch_token the architecture token, e.g. SCMP_ARCH_* * * This function removes an architecture from the given seccomp filter context. * If the architecture token is SCMP_ARCH_NATIVE then the native architecture * will be assumed. Returns zero on success, negative values on failure. * */ int seccomp_arch_remove(scmp_filter_ctx ctx, uint32_t arch_token); /** * Loads the filter into the kernel * @param ctx the filter context * * This function loads the given seccomp filter context into the kernel. If * the filter was loaded correctly, the kernel will be enforcing the filter * when this function returns. Returns zero on success, negative values on * error. * */ int seccomp_load(const scmp_filter_ctx ctx); /** * Get the value of a filter attribute * @param ctx the filter context * @param attr the filter attribute name * @param value the filter attribute value * * This function fetches the value of the given attribute name and returns it * via @value. Returns zero on success, negative values on failure. * */ int seccomp_attr_get(const scmp_filter_ctx ctx, enum scmp_filter_attr attr, uint32_t *value); /** * Set the value of a filter attribute * @param ctx the filter context * @param attr the filter attribute name * @param value the filter attribute value * * This function sets the value of the given attribute. Returns zero on * success, negative values on failure. * */ int seccomp_attr_set(scmp_filter_ctx ctx, enum scmp_filter_attr attr, uint32_t value); /** * Resolve a syscall number to a name * @param arch_token the architecture token, e.g. SCMP_ARCH_* * @param num the syscall number * * Resolve the given syscall number to the syscall name for the given * architecture; it is up to the caller to free the returned string. Returns * the syscall name on success, NULL on failure. * */ char *seccomp_syscall_resolve_num_arch(uint32_t arch_token, int num); /** * Resolve a syscall name to a number * @param arch_token the architecture token, e.g. SCMP_ARCH_* * @param name the syscall name * * Resolve the given syscall name to the syscall number for the given * architecture. Returns the syscall number on success, including negative * pseudo syscall numbers (e.g. __PNR_*); returns __NR_SCMP_ERROR on failure. * */ int seccomp_syscall_resolve_name_arch(uint32_t arch_token, const char *name); /** * Resolve a syscall name to a number and perform any rewriting necessary * @param arch_token the architecture token, e.g. SCMP_ARCH_* * @param name the syscall name * * Resolve the given syscall name to the syscall number for the given * architecture and do any necessary syscall rewriting needed by the * architecture. Returns the syscall number on success, including negative * pseudo syscall numbers (e.g. __PNR_*); returns __NR_SCMP_ERROR on failure. * */ int seccomp_syscall_resolve_name_rewrite(uint32_t arch_token, const char *name); /** * Resolve a syscall name to a number * @param name the syscall name * * Resolve the given syscall name to the syscall number. Returns the syscall * number on success, including negative pseudo syscall numbers (e.g. __PNR_*); * returns __NR_SCMP_ERROR on failure. * */ int seccomp_syscall_resolve_name(const char *name); /** * Set the priority of a given syscall * @param ctx the filter context * @param syscall the syscall number * @param priority priority value, higher value == higher priority * * This function sets the priority of the given syscall; this value is used * when generating the seccomp filter code such that higher priority syscalls * will incur less filter code overhead than the lower priority syscalls in the * filter. Returns zero on success, negative values on failure. * */ int seccomp_syscall_priority(scmp_filter_ctx ctx, int syscall, uint8_t priority); /** * Add a new rule to the filter * @param ctx the filter context * @param action the filter action * @param syscall the syscall number * @param arg_cnt the number of argument filters in the argument filter chain * @param ... scmp_arg_cmp structs (use of SCMP_ARG_CMP() recommended) * * This function adds a series of new argument/value checks to the seccomp * filter for the given syscall; multiple argument/value checks can be * specified and they will be chained together (AND'd together) in the filter. * If the specified rule needs to be adjusted due to architecture specifics it * will be adjusted without notification. Returns zero on success, negative * values on failure. * */ int seccomp_rule_add(scmp_filter_ctx ctx, uint32_t action, int syscall, unsigned int arg_cnt, ...); /** * Add a new rule to the filter * @param ctx the filter context * @param action the filter action * @param syscall the syscall number * @param arg_cnt the number of elements in the arg_array parameter * @param arg_array array of scmp_arg_cmp structs * * This function adds a series of new argument/value checks to the seccomp * filter for the given syscall; multiple argument/value checks can be * specified and they will be chained together (AND'd together) in the filter. * If the specified rule needs to be adjusted due to architecture specifics it * will be adjusted without notification. Returns zero on success, negative * values on failure. * */ int seccomp_rule_add_array(scmp_filter_ctx ctx, uint32_t action, int syscall, unsigned int arg_cnt, const struct scmp_arg_cmp *arg_array); /** * Add a new rule to the filter * @param ctx the filter context * @param action the filter action * @param syscall the syscall number * @param arg_cnt the number of argument filters in the argument filter chain * @param ... scmp_arg_cmp structs (use of SCMP_ARG_CMP() recommended) * * This function adds a series of new argument/value checks to the seccomp * filter for the given syscall; multiple argument/value checks can be * specified and they will be chained together (AND'd together) in the filter. * If the specified rule can not be represented on the architecture the * function will fail. Returns zero on success, negative values on failure. * */ int seccomp_rule_add_exact(scmp_filter_ctx ctx, uint32_t action, int syscall, unsigned int arg_cnt, ...); /** * Add a new rule to the filter * @param ctx the filter context * @param action the filter action * @param syscall the syscall number * @param arg_cnt the number of elements in the arg_array parameter * @param arg_array array of scmp_arg_cmp structs * * This function adds a series of new argument/value checks to the seccomp * filter for the given syscall; multiple argument/value checks can be * specified and they will be chained together (AND'd together) in the filter. * If the specified rule can not be represented on the architecture the * function will fail. Returns zero on success, negative values on failure. * */ int seccomp_rule_add_exact_array(scmp_filter_ctx ctx, uint32_t action, int syscall, unsigned int arg_cnt, const struct scmp_arg_cmp *arg_array); /** * Allocate a pair of notification request/response structures * @param req the request location * @param resp the response location * * This function allocates a pair of request/response structure by computing * the correct sized based on the currently running kernel. It returns zero on * success, and negative values on failure. * */ int seccomp_notify_alloc(struct seccomp_notif **req, struct seccomp_notif_resp **resp); /** * Free a pair of notification request/response structures. * @param req the request location * @param resp the response location */ void seccomp_notify_free(struct seccomp_notif *req, struct seccomp_notif_resp *resp); /** * Receive a notification from a seccomp notification fd * @param fd the notification fd * @param req the request buffer to save into * * Blocks waiting for a notification on this fd. This function is thread safe * (synchronization is performed in the kernel). Returns zero on success, * negative values on error. * */ int seccomp_notify_receive(int fd, struct seccomp_notif *req); /** * Send a notification response to a seccomp notification fd * @param fd the notification fd * @param resp the response buffer to use * * Sends a notification response on this fd. This function is thread safe * (synchronization is performed in the kernel). Returns zero on success, * negative values on error. * */ int seccomp_notify_respond(int fd, struct seccomp_notif_resp *resp); /** * Check if a notification id is still valid * @param fd the notification fd * @param id the id to test * * Checks to see if a notification id is still valid. Returns 0 on success, and * negative values on failure. * */ int seccomp_notify_id_valid(int fd, uint64_t id); /** * Return the notification fd from a filter that has already been loaded * @param ctx the filter context * * This returns the listener fd that was generated when the seccomp policy was * loaded. This is only valid after seccomp_load() with a filter that makes * use of SCMP_ACT_NOTIFY. * */ int seccomp_notify_fd(const scmp_filter_ctx ctx); /** * Generate seccomp Pseudo Filter Code (PFC) and export it to a file * @param ctx the filter context * @param fd the destination fd * * This function generates seccomp Pseudo Filter Code (PFC) and writes it to * the given fd. Returns zero on success, negative values on failure. * */ int seccomp_export_pfc(const scmp_filter_ctx ctx, int fd); /** * Generate seccomp Berkley Packet Filter (BPF) code and export it to a file * @param ctx the filter context * @param fd the destination fd * * This function generates seccomp Berkley Packer Filter (BPF) code and writes * it to the given fd. Returns zero on success, negative values on failure. * */ int seccomp_export_bpf(const scmp_filter_ctx ctx, int fd); /* * pseudo syscall definitions */ /* NOTE - pseudo syscall values {-1..-99} are reserved */ #define __NR_SCMP_ERROR -1 #define __NR_SCMP_UNDEF -2 #include #ifdef __cplusplus } #endif #endif