100 // to buf with len buflen; buf is returned.
101 static char* describe_pthread_attr(char* buf, size_t buflen, const pthread_attr_t* attr);
102
103 // A safe implementation of realpath which will not cause a buffer overflow if the resolved path
104 // is longer than PATH_MAX.
105 // On success, returns 'outbuf', which now contains the path.
106 // On error, it will return NULL and set errno. The content of 'outbuf' is undefined.
107 // On truncation error ('outbuf' too small), it will return NULL and set errno to ENAMETOOLONG.
108 static char* realpath(const char* filename, char* outbuf, size_t outbuflen);
109
110 // Returns true if given uid is root.
111 static bool is_root(uid_t uid);
112
113 // Returns true if given uid is effective or root uid.
114 static bool matches_effective_uid_or_root(uid_t uid);
115
116 // Returns true if either given uid is effective uid and given gid is
117 // effective gid, or if given uid is root.
118 static bool matches_effective_uid_and_gid_or_root(uid_t uid, gid_t gid);
119
120 static void print_umask(outputStream* st, mode_t umsk);
121
122 static void print_user_info(outputStream* st);
123
124 #ifdef SUPPORTS_CLOCK_MONOTONIC
125
126 private:
127 // These need to be members so we can access them from inline functions
128 static int (*_clock_gettime)(clockid_t, struct timespec *);
129 static int (*_clock_getres)(clockid_t, struct timespec *);
130 public:
131 static bool supports_monotonic_clock();
132 static int clock_gettime(clockid_t clock_id, struct timespec *tp);
133 static int clock_getres(clockid_t clock_id, struct timespec *tp);
134
135 #else
136
137 static bool supports_monotonic_clock() { return false; }
138
139 #endif
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100 // to buf with len buflen; buf is returned.
101 static char* describe_pthread_attr(char* buf, size_t buflen, const pthread_attr_t* attr);
102
103 // A safe implementation of realpath which will not cause a buffer overflow if the resolved path
104 // is longer than PATH_MAX.
105 // On success, returns 'outbuf', which now contains the path.
106 // On error, it will return NULL and set errno. The content of 'outbuf' is undefined.
107 // On truncation error ('outbuf' too small), it will return NULL and set errno to ENAMETOOLONG.
108 static char* realpath(const char* filename, char* outbuf, size_t outbuflen);
109
110 // Returns true if given uid is root.
111 static bool is_root(uid_t uid);
112
113 // Returns true if given uid is effective or root uid.
114 static bool matches_effective_uid_or_root(uid_t uid);
115
116 // Returns true if either given uid is effective uid and given gid is
117 // effective gid, or if given uid is root.
118 static bool matches_effective_uid_and_gid_or_root(uid_t uid, gid_t gid);
119
120 static struct sigaction *get_preinstalled_handler(int);
121 static void save_preinstalled_handler(int, struct sigaction&);
122
123 static void print_umask(outputStream* st, mode_t umsk);
124
125 static void print_user_info(outputStream* st);
126
127 #ifdef SUPPORTS_CLOCK_MONOTONIC
128
129 private:
130 // These need to be members so we can access them from inline functions
131 static int (*_clock_gettime)(clockid_t, struct timespec *);
132 static int (*_clock_getres)(clockid_t, struct timespec *);
133 public:
134 static bool supports_monotonic_clock();
135 static int clock_gettime(clockid_t clock_id, struct timespec *tp);
136 static int clock_getres(clockid_t clock_id, struct timespec *tp);
137
138 #else
139
140 static bool supports_monotonic_clock() { return false; }
141
142 #endif
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