| /* |
| * <sys/capability.h> |
| * |
| * Copyright (C) 1997 Aleph One |
| * Copyright (C) 1997,8, 2008,19,20 Andrew G. Morgan <morgan@kernel.org> |
| * |
| * defunct POSIX.1e Standard: 25.2 Capabilities <sys/capability.h> |
| */ |
| |
| #ifndef _SYS_CAPABILITY_H |
| #define _SYS_CAPABILITY_H |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* |
| * This file complements the kernel file by providing prototype |
| * information for the user library. |
| */ |
| |
| #include <sys/types.h> |
| #include <stdint.h> |
| #include <linux/types.h> |
| |
| #ifndef __user |
| #define __user |
| #endif |
| #include <linux/capability.h> |
| |
| /* |
| * POSIX capability types |
| */ |
| |
| /* |
| * Opaque capability handle (defined internally by libcap) |
| * internal capability representation |
| */ |
| typedef struct _cap_struct *cap_t; |
| |
| /* "external" capability representation is a (void *) */ |
| |
| /* |
| * This is the type used to identify capabilities |
| */ |
| |
| typedef int cap_value_t; |
| |
| /* |
| * libcap initialized first unnamed capability of the running kernel. |
| * capsh includes a runtime test to flag when this is larger than |
| * what is known to libcap... Time for a new libcap release! |
| */ |
| extern cap_value_t cap_max_bits(void); |
| |
| /* |
| * cap_proc_root reads and (optionally: when root != NULL) changes |
| * libcap's notion of where the "/proc" filesystem is mounted. When |
| * the return value is NULL, it should be interpreted as the |
| * value "/proc". |
| * |
| * Note, this is a global value and not considered thread safe to |
| * write - so the client should take suitable care when changing |
| * it. |
| * |
| * Further, libcap will allocate a memory copy for storing the |
| * replacement root, and it is this kind of memory that is returned. |
| * So, when changing the value, the caller should |
| * cap_free(the-return-value) else cause a memory leak. |
| * |
| * Note, the library uses a destructor to clean up the live allocated |
| * value of the working setting. |
| */ |
| extern char *cap_proc_root(const char *root); |
| |
| /* |
| * Set identifiers |
| */ |
| typedef enum { |
| CAP_EFFECTIVE = 0, /* Specifies the effective flag */ |
| CAP_PERMITTED = 1, /* Specifies the permitted flag */ |
| CAP_INHERITABLE = 2 /* Specifies the inheritable flag */ |
| } cap_flag_t; |
| |
| typedef enum { |
| CAP_IAB_INH = 2, |
| CAP_IAB_AMB = 3, |
| CAP_IAB_BOUND = 4 |
| } cap_iab_vector_t; |
| |
| /* |
| * An opaque generalization of the inheritable bits that includes both |
| * what ambient bits to raise and what bounding bits to *lower* (aka |
| * drop). None of these bits once set, using cap_iab_set(), affect |
| * the running process but are consulted, through the execve() system |
| * call, by the kernel. Note, the ambient bits ('A') of the running |
| * process are fragile with respect to other aspects of the "posix" |
| * (cap_t) operations: most importantly, 'A' cannot ever hold bits not |
| * present in the intersection of 'pI' and 'pP'. The kernel |
| * immediately drops all ambient caps whenever such a situation |
| * arises. Typically, the ambient bits are used to support a naive |
| * capability inheritance model - at odds with the POSIX (sic) model |
| * of inheritance where inherited (pI) capabilities need to also be |
| * wanted by the executed binary (fI) in order to become raised |
| * through exec. |
| */ |
| typedef struct cap_iab_s *cap_iab_t; |
| |
| /* |
| * These are the states available to each capability |
| */ |
| typedef enum { |
| CAP_CLEAR=0, /* The flag is cleared/disabled */ |
| CAP_SET=1 /* The flag is set/enabled */ |
| } cap_flag_value_t; |
| |
| /* |
| * User-space capability manipulation routines |
| */ |
| typedef unsigned cap_mode_t; |
| #define CAP_MODE_UNCERTAIN ((cap_mode_t) 0) |
| #define CAP_MODE_NOPRIV ((cap_mode_t) 1) |
| #define CAP_MODE_PURE1E_INIT ((cap_mode_t) 2) |
| #define CAP_MODE_PURE1E ((cap_mode_t) 3) |
| |
| /* libcap/cap_alloc.c */ |
| extern cap_t cap_dup(cap_t); |
| extern int cap_free(void *); |
| extern cap_t cap_init(void); |
| extern cap_iab_t cap_iab_dup(cap_iab_t); |
| extern cap_iab_t cap_iab_init(void); |
| |
| /* libcap/cap_flag.c */ |
| extern int cap_get_flag(cap_t, cap_value_t, cap_flag_t, cap_flag_value_t *); |
| extern int cap_set_flag(cap_t, cap_flag_t, int, const cap_value_t *, |
| cap_flag_value_t); |
| extern int cap_clear(cap_t); |
| extern int cap_clear_flag(cap_t, cap_flag_t); |
| extern int cap_fill_flag(cap_t cap_d, cap_flag_t to, |
| cap_t ref, cap_flag_t from); |
| extern int cap_fill(cap_t, cap_flag_t, cap_flag_t); |
| |
| #define CAP_DIFFERS(result, flag) (((result) & (1 << (flag))) != 0) |
| extern int cap_compare(cap_t, cap_t); |
| #define CAP_IAB_DIFFERS(result, vector) (((result) & (1 << (vector))) != 0) |
| extern int cap_iab_compare(cap_iab_t, cap_iab_t); |
| |
| extern cap_flag_value_t cap_iab_get_vector(cap_iab_t, cap_iab_vector_t, |
| cap_value_t); |
| extern int cap_iab_set_vector(cap_iab_t, cap_iab_vector_t, cap_value_t, |
| cap_flag_value_t); |
| extern int cap_iab_fill(cap_iab_t, cap_iab_vector_t, cap_t, cap_flag_t); |
| |
| /* libcap/cap_file.c */ |
| extern cap_t cap_get_fd(int); |
| extern cap_t cap_get_file(const char *); |
| extern uid_t cap_get_nsowner(cap_t); |
| extern int cap_set_fd(int, cap_t); |
| extern int cap_set_file(const char *, cap_t); |
| extern int cap_set_nsowner(cap_t, uid_t); |
| |
| /* libcap/cap_proc.c */ |
| extern cap_t cap_get_proc(void); |
| extern cap_t cap_get_pid(pid_t); |
| extern int cap_set_proc(cap_t); |
| |
| extern int cap_get_bound(cap_value_t); |
| extern int cap_drop_bound(cap_value_t); |
| #define CAP_IS_SUPPORTED(cap) (cap_get_bound(cap) >= 0) |
| |
| extern int cap_get_ambient(cap_value_t); |
| extern int cap_set_ambient(cap_value_t, cap_flag_value_t); |
| extern int cap_reset_ambient(void); |
| #define CAP_AMBIENT_SUPPORTED() (cap_get_ambient(CAP_CHOWN) >= 0) |
| |
| /* libcap/cap_extint.c */ |
| extern ssize_t cap_size(cap_t cap_d); |
| extern ssize_t cap_copy_ext(void *cap_ext, cap_t cap_d, ssize_t length); |
| extern cap_t cap_copy_int(const void *cap_ext); |
| extern cap_t cap_copy_int_check(const void *cap_ext, ssize_t length); |
| |
| /* libcap/cap_text.c */ |
| extern cap_t cap_from_text(const char *); |
| extern char * cap_to_text(cap_t, ssize_t *); |
| extern int cap_from_name(const char *, cap_value_t *); |
| extern char * cap_to_name(cap_value_t); |
| |
| extern char * cap_iab_to_text(cap_iab_t iab); |
| extern cap_iab_t cap_iab_from_text(const char *text); |
| |
| /* libcap/cap_proc.c */ |
| extern void cap_set_syscall(long int (*new_syscall)(long int, |
| long int, long int, long int), |
| long int (*new_syscall6)(long int, |
| long int, long int, long int, |
| long int, long int, long int)); |
| |
| extern int cap_set_mode(cap_mode_t flavor); |
| extern cap_mode_t cap_get_mode(void); |
| extern const char *cap_mode_name(cap_mode_t flavor); |
| |
| extern unsigned cap_get_secbits(void); |
| extern int cap_set_secbits(unsigned bits); |
| |
| extern int cap_prctl(long int pr_cmd, long int arg1, long int arg2, |
| long int arg3, long int arg4, long int arg5); |
| extern int cap_prctlw(long int pr_cmd, long int arg1, long int arg2, |
| long int arg3, long int arg4, long int arg5); |
| extern int cap_setuid(uid_t uid); |
| extern int cap_setgroups(gid_t gid, size_t ngroups, const gid_t groups[]); |
| |
| extern cap_iab_t cap_iab_get_proc(void); |
| extern cap_iab_t cap_iab_get_pid(pid_t); |
| extern int cap_iab_set_proc(cap_iab_t iab); |
| |
| typedef struct cap_launch_s *cap_launch_t; |
| |
| extern cap_launch_t cap_new_launcher(const char *arg0, const char * const *argv, |
| const char * const *envp); |
| extern cap_launch_t cap_func_launcher(int (callback_fn)(void *detail)); |
| extern int cap_launcher_callback(cap_launch_t attr, |
| int (callback_fn)(void *detail)); |
| extern int cap_launcher_setuid(cap_launch_t attr, uid_t uid); |
| extern int cap_launcher_setgroups(cap_launch_t attr, gid_t gid, |
| int ngroups, const gid_t *groups); |
| extern int cap_launcher_set_mode(cap_launch_t attr, cap_mode_t flavor); |
| extern cap_iab_t cap_launcher_set_iab(cap_launch_t attr, cap_iab_t iab); |
| extern int cap_launcher_set_chroot(cap_launch_t attr, const char *chroot); |
| extern pid_t cap_launch(cap_launch_t attr, void *detail); |
| |
| /* |
| * system calls - look to libc for function to system call |
| * mapping. Note, libcap does not use capset directly, but permits the |
| * cap_set_syscall() to redirect the system call function. |
| */ |
| extern int capget(cap_user_header_t header, cap_user_data_t data); |
| extern int capset(cap_user_header_t header, const cap_user_data_t data); |
| |
| /* deprecated - use cap_get_pid() */ |
| extern int capgetp(pid_t pid, cap_t cap_d); |
| |
| /* not valid with filesystem capability support - use cap_set_proc() */ |
| extern int capsetp(pid_t pid, cap_t cap_d); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _SYS_CAPABILITY_H */ |