Section 3: library functions
send_easy_trap, send_trap_vars, send_v2trap – send TRAPs or INFORMs from a Net-SNMP MIB module Synopsis #include <net-snmp/agent/agent_trap.h> void send_easy_trap(int trap, int specific); void send_trap_vars(int trap, int specific, struct variable_list *vars); void send_v2trap(struct variable_list *vars); Description These three routines may be used to send traps from a MIB module within the Net-SNMP agent (including an AgentX subagent)….
send_easy_trap, send_trap_vars, send_v2trap – send TRAPs or INFORMs from a Net-SNMP MIB module Synopsis #include <net-snmp/agent/agent_trap.h> void send_easy_trap(int trap, int specific); void send_trap_vars(int trap, int specific, struct variable_list *vars); void send_v2trap(struct variable_list *vars); Description These three routines may be used to send traps from a MIB module within the Net-SNMP agent (including an AgentX subagent)….
QuantLib::GenericRiskStatistics – empirical-distribution risk measures Synopsis #include <ql/math/statistics/riskstatistics.hpp> Inherits S. Public Types typedef S::value_type value_type Public Member Functions Real semiVariance () const Real semiDeviation () const Real downsideVariance () const Real downsideDeviation () const Real regret (Real target) const Real potentialUpside (Real percentile) const potential upside (the reciprocal of VAR) at a given percentile Real…
QuantLib::GenericRiskStatistics – empirical-distribution risk measures Synopsis #include <ql/math/statistics/riskstatistics.hpp> Inherits S. Public Types typedef S::value_type value_type Public Member Functions Real semiVariance () const Real semiDeviation () const Real downsideVariance () const Real downsideDeviation () const Real regret (Real target) const Real potentialUpside (Real percentile) const potential upside (the reciprocal of VAR) at a given percentile Real…
sem_wait, sem_timedwait, sem_trywait – lock a semaphore Synopsis #include <semaphore.h> int sem_wait(sem_t *sem); int sem_trywait(sem_t *sem); int sem_timedwait(sem_t *sem, const struct timespec *abs_timeout); Link with -pthread. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): sem_timedwait(): _POSIX_C_SOURCE >= 200112L Description sem_wait() decrements (locks) the semaphore pointed to by sem. If the semaphore’s value is greater than zero, then…
sem_unlink – remove a named semaphore Synopsis #include <semaphore.h> int sem_unlink(const char *name); Link with -pthread. Description sem_unlink() removes the named semaphore referred to by name. The semaphore name is removed immediately. The semaphore is destroyed once all other processes that have the semaphore open close it. Return Value On success sem_unlink() returns 0; on…
sem_wait, sem_timedwait, sem_trywait – lock a semaphore Synopsis #include <semaphore.h> int sem_wait(sem_t *sem); int sem_trywait(sem_t *sem); int sem_timedwait(sem_t *sem, const struct timespec *abs_timeout); Link with -pthread. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): sem_timedwait(): _POSIX_C_SOURCE >= 200112L Description sem_wait() decrements (locks) the semaphore pointed to by sem. If the semaphore’s value is greater than zero, then…
sem_wait, sem_timedwait, sem_trywait – lock a semaphore Synopsis #include <semaphore.h> int sem_wait(sem_t *sem); int sem_trywait(sem_t *sem); int sem_timedwait(sem_t *sem, const struct timespec *abs_timeout); Link with -pthread. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): sem_timedwait(): _POSIX_C_SOURCE >= 200112L Description sem_wait() decrements (locks) the semaphore pointed to by sem. If the semaphore’s value is greater than zero, then…
sem_post – unlock a semaphore Synopsis #include <semaphore.h> int sem_post(sem_t *sem); Link with -pthread. Description sem_post() increments (unlocks) the semaphore pointed to by sem. If the semaphore’s value consequently becomes greater than zero, then another process or thread blocked in a sem_wait(3) call will be woken up and proceed to lock the semaphore. Return Value…
sem_open – initialize and open a named semaphore Synopsis #include <fcntl.h> /* For O_* constants */ #include <semaphore.h> #include <sys/stat.h> /* For mode constants */ sem_t *sem_open(const char *name, int oflag); sem_t *sem_open(const char *name, int oflag, mode_t mode, unsigned int value); Link with -pthread. Description sem_open() creates a new POSIX semaphore or opens an…
sem_init – initialize an unnamed semaphore Synopsis #include <semaphore.h> int sem_init(sem_t *sem, int pshared, unsigned int value); Link with -pthread. Description sem_init() initializes the unnamed semaphore at the address pointed to by sem. The value argument specifies the initial value for the semaphore. The pshared argument indicates whether this semaphore is to be shared between…
sem_getvalue – get the value of a semaphore Synopsis #include <semaphore.h> int sem_getvalue(sem_t *sem, int *sval); Link with -pthread. Description sem_getvalue() places the current value of the semaphore pointed to sem into the integer pointed to by sval. If one or more processes or threads are blocked waiting to lock the semaphore with sem_wait(3), POSIX.1…
sem_destroy – destroy an unnamed semaphore Synopsis #include <semaphore.h> int sem_destroy(sem_t *sem); Link with -pthread. Description sem_destroy() destroys the unnamed semaphore at the address pointed to by sem. Only a semaphore that has been initialized by sem_init(3) should be destroyed using sem_destroy(). Destroying a semaphore that other processes or threads are currently blocked on (in…
sem_close – close a named semaphore Synopsis #include <semaphore.h> int sem_close(sem_t *sem); Link with -pthread. Description sem_close() closes the named semaphore referred to by sem, allowing any resources that the system has allocated to the calling process for this semaphore to be freed. Return Value On success sem_close() returns 0; on error, -1 is returned,…
selinux_path, selinux_policy_root, selinux_binary_policy_path, selinux_current_policy_path, selinux_failsafe_context_path, selinux_removable_context_path, selinux_default_context_path, selinux_user_contexts_path, selinux_file_context_path, selinux_media_context_path, selinux_contexts_path – These functions return the paths to the active SELinux policy configuration directories and files Synopsis #include <selinux/selinux.h> const char *selinux_path(void); const char *selinux_policy_root(void); const char *selinux_binary_policy_path(void); const char *selinux_current_policy_path(void); const char *selinux_failsafe_context_path(void); const char *selinux_removable_context_path(void); const char *selinux_default_context_path(void); const char *selinux_user_contexts_path(void); const char…
selinux_path, selinux_policy_root, selinux_binary_policy_path, selinux_current_policy_path, selinux_failsafe_context_path, selinux_removable_context_path, selinux_default_context_path, selinux_user_contexts_path, selinux_file_context_path, selinux_media_context_path, selinux_contexts_path – These functions return the paths to the active SELinux policy configuration directories and files Synopsis #include <selinux/selinux.h> const char *selinux_path(void); const char *selinux_policy_root(void); const char *selinux_binary_policy_path(void); const char *selinux_current_policy_path(void); const char *selinux_failsafe_context_path(void); const char *selinux_removable_context_path(void); const char *selinux_default_context_path(void); const char *selinux_user_contexts_path(void); const char…
selinux_path, selinux_policy_root, selinux_binary_policy_path, selinux_current_policy_path, selinux_failsafe_context_path, selinux_removable_context_path, selinux_default_context_path, selinux_user_contexts_path, selinux_file_context_path, selinux_media_context_path, selinux_contexts_path – These functions return the paths to the active SELinux policy configuration directories and files Synopsis #include <selinux/selinux.h> const char *selinux_path(void); const char *selinux_policy_root(void); const char *selinux_binary_policy_path(void); const char *selinux_current_policy_path(void); const char *selinux_failsafe_context_path(void); const char *selinux_removable_context_path(void); const char *selinux_default_context_path(void); const char *selinux_user_contexts_path(void); const char…
selinux_status_open, selinux_status_close, selinux_status_updated, selinux_status_getenforce, selinux_status_policyload and selinux_status_deny_unknown – reference the SELinux kernel status without invocation of system calls Synopsis #include <selinux/avc.h> int selinux_status_open(int fallback); void selinux_status_close(void); int selinux_status_updated(void); int selinux_status_getenforce(void); int selinux_status_policyload(void); int selinux_status_deny_unknown(void); Description Linux 2.6.37 or later provides a SELinux kernel status page; being mostly placed on /sys/fs/selinux/status entry. It enables userspace applications…
selinux_status_open, selinux_status_close, selinux_status_updated, selinux_status_getenforce, selinux_status_policyload and selinux_status_deny_unknown – reference the SELinux kernel status without invocation of system calls Synopsis #include <selinux/avc.h> int selinux_status_open(int fallback); void selinux_status_close(void); int selinux_status_updated(void); int selinux_status_getenforce(void); int selinux_status_policyload(void); int selinux_status_deny_unknown(void); Description Linux 2.6.37 or later provides a SELinux kernel status page; being mostly placed on /sys/fs/selinux/status entry. It enables userspace applications…
selinux_status_open, selinux_status_close, selinux_status_updated, selinux_status_getenforce, selinux_status_policyload and selinux_status_deny_unknown – reference the SELinux kernel status without invocation of system calls Synopsis #include <selinux/avc.h> int selinux_status_open(int fallback); void selinux_status_close(void); int selinux_status_updated(void); int selinux_status_getenforce(void); int selinux_status_policyload(void); int selinux_status_deny_unknown(void); Description Linux 2.6.37 or later provides a SELinux kernel status page; being mostly placed on /sys/fs/selinux/status entry. It enables userspace applications…