1LIBCAP(3) Linux Programmer's Manual LIBCAP(3)
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6 cap_clear, cap_clear_flag, cap_compare, cap_copy_ext, cap_copy_int,
7 cap_free, cap_from_name, cap_from_text, cap_get_fd, cap_get_file,
8 cap_get_flag, cap_get_pid, cap_get_proc, cap_set_fd, cap_set_file,
9 cap_set_flag, cap_set_proc, cap_size, cap_to_name, cap_to_text,
10 cap_get_pid, cap_dup - capability data object manipulation
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13 #include <sys/capability.h>
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15 int cap_clear(cap_t cap_p);
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17 int cap_clear_flag(cap_t cap_p, cap_flag_t flag);
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19 int cap_compare(cap_t cap_a, cap_t cap_b);
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21 ssize_t cap_copy_ext(void *ext_p, cap_t cap_p, ssize_t size);
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23 cap_t cap_copy_int(const void *ext_p);
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25 int cap_free(void *obj_d);
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27 int cap_from_name(const char *name, cap_value_t *cap_p);
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29 cap_t cap_from_text(const char *buf_p);
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31 cap_t cap_get_fd(int fd);
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33 cap_t cap_get_file(const char *path_p);
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35 int cap_get_flag(cap_t cap_p, cap_value_t cap,
36 cap_flag_t flag, cap_flag_value_t *value_p);
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38 #include <sys/types.h>
39 cap_t cap_get_pid(pid_t pid);
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41 cap_t cap_get_proc(void);
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43 int cap_set_fd(int fd, cap_t caps);
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45 int cap_set_file(const char *path_p, cap_t cap_p);
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48 int cap_set_flag(cap_t cap_p, cap_flag_t flag, int ncap,
49 const cap_value_t *caps, cap_flag_value_t value);
50 int cap_set_proc(cap_t cap_p);
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52 ssize_t cap_size(cap_t cap_p);
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54 char *cap_to_name(cap_value_t cap);
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56 char *cap_to_text(cap_t caps, ssize_t *length_p);
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58 cap_t cap_get_pid(pid_t pid);
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60 cap_t cap_dup(cap_t cap_p);
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62 Link with -lcap.
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65 These functions work on a capability state held in working storage. A
66 cap_t holds information about the capabilities in each of the three
67 sets, Permitted, Inheritable, and Effective. Each capability in a set
68 may be clear (disabled, 0) or set (enabled, 1).
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70 These functions work with the following data types:
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72 cap_value_t identifies a capability, such as CAP_CHOWN.
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74 cap_flag_t identifies one of the three flags associated with a
75 capability (i.e., it identifies one of the three
76 capability sets). Valid values for this type are
77 CAP_EFFECTIVE, CAP_INHERITABLE or CAP_PERMITTED.
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79 cap_flag_value_t identifies the setting of a particular capability
80 flag (i.e, the value of a capability in a set).
81 Valid values for this type are CAP_CLEAR(0) or
82 CAP_SET(1).
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85 The return value is generally specific to the individual function
86 called. On failure, errno is set appropriately.
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89 These functions are as per the withdrawn POSIX.1e draft specification.
90 The following functions are Linux extensions: cap_clear_flag(),
91 cap_compare(), cap_from_name(), cap_to_name(), and cap_compare().
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94 cap_clear(3), cap_copy_ext(3), cap_from_text(3), cap_get_file(3),
95 cap_get_proc(3), cap_init(3), capabilities(7), getpid(2) capsh(1)
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99 2008-07-29 LIBCAP(3)