SysTutorials Posts

sd_journal_next, sd_journal_previous, sd_journal_next_skip, sd_journal_previous_skip, SD_JOURNAL_FOREACH, SD_JOURNAL_FOREACH_BACKWARDS – Advance or set back the read pointer in the journal Synopsis #include <systemd/sd-journal.h> int sd_journal_next(sd_journal *j); int sd_journal_previous(sd_journal *j); int sd_journal_next_skip(sd_journal *j, uint64_t skip); int sd_journal_previous_skip(sd_journal *j, uint64_t skip); SD_JOURNAL_FOREACH(sd_journal *j); SD_JOURNAL_FOREACH_BACKWARDS(sd_journal *j); Description sd_journal_next() advances the read pointer into the journal by one entry. The only argument taken is a journal context object as allocated…

sd_journal_open, sd_journal_open_directory, sd_journal_open_files, sd_journal_open_container, sd_journal_close, sd_journal, SD_JOURNAL_LOCAL_ONLY, SD_JOURNAL_RUNTIME_ONLY, SD_JOURNAL_SYSTEM, SD_JOURNAL_CURRENT_USER – Open the system journal for reading Synopsis #include <systemd/sd-journal.h> int sd_journal_open(sd_journal **ret, int flags); int sd_journal_open_directory(sd_journal **ret, const char *path, int flags); int sd_journal_open_files(sd_journal **ret, const char **paths, int flags); int sd_journal_open_container(sd_journal **ret, const char *machine, int flags); void sd_journal_close(sd_journal *j); Description sd_journal_open() opens the log journal for reading. It will find all journal files automatically…

sd_journal_get_fd, sd_journal_get_events, sd_journal_get_timeout, sd_journal_process, sd_journal_wait, sd_journal_reliable_fd, SD_JOURNAL_NOP, SD_JOURNAL_APPEND, SD_JOURNAL_INVALIDATE – Journal change notification interface Synopsis #include <systemd/sd-journal.h> int sd_journal_get_fd(sd_journal *j); int sd_journal_get_events(sd_journal *j); int sd_journal_get_timeout(sd_journal *j, uint64_t *timeout_usec); int sd_journal_process(sd_journal *j); int sd_journal_wait(sd_journal *j, uint64_t timeout_usec); int sd_journal_reliable_fd(sd_journal *j); Description sd_journal_get_fd() returns a file descriptor that may be asynchronously polled in an external event loop and is signaled as soon as the journal…

sd_journal_get_fd, sd_journal_get_events, sd_journal_get_timeout, sd_journal_process, sd_journal_wait, sd_journal_reliable_fd, SD_JOURNAL_NOP, SD_JOURNAL_APPEND, SD_JOURNAL_INVALIDATE – Journal change notification interface Synopsis #include <systemd/sd-journal.h> int sd_journal_get_fd(sd_journal *j); int sd_journal_get_events(sd_journal *j); int sd_journal_get_timeout(sd_journal *j, uint64_t *timeout_usec); int sd_journal_process(sd_journal *j); int sd_journal_wait(sd_journal *j, uint64_t timeout_usec); int sd_journal_reliable_fd(sd_journal *j); Description sd_journal_get_fd() returns a file descriptor that may be asynchronously polled in an external event loop and is signaled as soon as the journal…

sd_journal_get_fd, sd_journal_get_events, sd_journal_get_timeout, sd_journal_process, sd_journal_wait, sd_journal_reliable_fd, SD_JOURNAL_NOP, SD_JOURNAL_APPEND, SD_JOURNAL_INVALIDATE – Journal change notification interface Synopsis #include <systemd/sd-journal.h> int sd_journal_get_fd(sd_journal *j); int sd_journal_get_events(sd_journal *j); int sd_journal_get_timeout(sd_journal *j, uint64_t *timeout_usec); int sd_journal_process(sd_journal *j); int sd_journal_wait(sd_journal *j, uint64_t timeout_usec); int sd_journal_reliable_fd(sd_journal *j); Description sd_journal_get_fd() returns a file descriptor that may be asynchronously polled in an external event loop and is signaled as soon as the journal…

sd-daemon, SD_EMERG, SD_ALERT, SD_CRIT, SD_ERR, SD_WARNING, SD_NOTICE, SD_INFO, SD_DEBUG – APIs for new-style daemons Synopsis #include <systemd/sd-daemon.h> pkg-config –cflags –libs libsystemd Description sd-daemon.h provide APIs for new-style daemons, as implemented by the systemd(1) init system. See sd_listen_fds(3), sd_notify(3), sd_booted(3), sd_is_fifo(3), sd_watchdog_enabled(3) for more information about the functions implemented. In addition to these functions, a couple…

sd-id128, sd_id128_t, SD_ID128_MAKE, SD_ID128_CONST_STR, SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL, sd_id128_equal – APIs for processing 128-bit IDs Synopsis #include <systemd/sd-id128.h> pkg-config –cflags –libs libsystemd Description sd-id128.h provides APIs to process and generate 128-bit ID values. The 128-bit ID values processed and generated by these APIs are a generalization of OSF UUIDs as defined by m[blue]RFC 4122m[][1] but use a…

sd-id128, sd_id128_t, SD_ID128_MAKE, SD_ID128_CONST_STR, SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL, sd_id128_equal – APIs for processing 128-bit IDs Synopsis #include <systemd/sd-id128.h> pkg-config –cflags –libs libsystemd Description sd-id128.h provides APIs to process and generate 128-bit ID values. The 128-bit ID values processed and generated by these APIs are a generalization of OSF UUIDs as defined by m[blue]RFC 4122m[][1] but use a…

sd-id128, sd_id128_t, SD_ID128_MAKE, SD_ID128_CONST_STR, SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL, sd_id128_equal – APIs for processing 128-bit IDs Synopsis #include <systemd/sd-id128.h> pkg-config –cflags –libs libsystemd Description sd-id128.h provides APIs to process and generate 128-bit ID values. The 128-bit ID values processed and generated by these APIs are a generalization of OSF UUIDs as defined by m[blue]RFC 4122m[][1] but use a…

sd-id128, sd_id128_t, SD_ID128_MAKE, SD_ID128_CONST_STR, SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL, sd_id128_equal – APIs for processing 128-bit IDs Synopsis #include <systemd/sd-id128.h> pkg-config –cflags –libs libsystemd Description sd-id128.h provides APIs to process and generate 128-bit ID values. The 128-bit ID values processed and generated by these APIs are a generalization of OSF UUIDs as defined by m[blue]RFC 4122m[][1] but use a…

sd-daemon, SD_EMERG, SD_ALERT, SD_CRIT, SD_ERR, SD_WARNING, SD_NOTICE, SD_INFO, SD_DEBUG – APIs for new-style daemons Synopsis #include <systemd/sd-daemon.h> pkg-config –cflags –libs libsystemd Description sd-daemon.h provide APIs for new-style daemons, as implemented by the systemd(1) init system. See sd_listen_fds(3), sd_notify(3), sd_booted(3), sd_is_fifo(3), sd_watchdog_enabled(3) for more information about the functions implemented. In addition to these functions, a couple…

sd-daemon, SD_EMERG, SD_ALERT, SD_CRIT, SD_ERR, SD_WARNING, SD_NOTICE, SD_INFO, SD_DEBUG – APIs for new-style daemons Synopsis #include <systemd/sd-daemon.h> pkg-config –cflags –libs libsystemd Description sd-daemon.h provide APIs for new-style daemons, as implemented by the systemd(1) init system. See sd_listen_fds(3), sd_notify(3), sd_booted(3), sd_is_fifo(3), sd_watchdog_enabled(3) for more information about the functions implemented. In addition to these functions, a couple…

sd-daemon, SD_EMERG, SD_ALERT, SD_CRIT, SD_ERR, SD_WARNING, SD_NOTICE, SD_INFO, SD_DEBUG – APIs for new-style daemons Synopsis #include <systemd/sd-daemon.h> pkg-config –cflags –libs libsystemd Description sd-daemon.h provide APIs for new-style daemons, as implemented by the systemd(1) init system. See sd_listen_fds(3), sd_notify(3), sd_booted(3), sd_is_fifo(3), sd_watchdog_enabled(3) for more information about the functions implemented. In addition to these functions, a couple…

NAME sdsdot.f – SYNOPSIS Functions/Subroutines REAL function sdsdot (N, SB, SX, INCX, SY, INCY) SDSDOT Function/Subroutine Documentation REAL function sdsdot (integerN, realSB, real, dimension(*)SX, integerINCX, real, dimension(*)SY, integerINCY) SDSDOT Purpose:   Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November 2011 Definition at line 141 of file sdsdot.f….

NAME sdot.f – SYNOPSIS Functions/Subroutines REAL function sdot (N, SX, INCX, SY, INCY) SDOT Function/Subroutine Documentation REAL function sdot (integerN, real, dimension(*)SX, integerINCX, real, dimension(*)SY, integerINCY) SDOT Purpose: SDOT forms the dot product of two vectors. uses unrolled loops for increments equal to one.   Author: Univ. of Tennessee Univ. of California Berkeley Univ. of…

SDL_sound.h – Synopsis #include ‘SDL.h’ #include ‘SDL_endian.h’ Data Structures struct Sound_AudioInfo Information about an existing sample’s format. struct Sound_DecoderInfo Information about available soudn decoders. struct Sound_Sample Represents sound data in the process of being decoded. struct Sound_Version Information the version of SDL_sound in use. Defines #define SOUND_VERSION(x) Macro to determine SDL_sound version program was compiled…

SDL_mutexV – Unlock a mutex Synopsis #include "SDL.h" #include "SDL_thread.h" int SDL_mutexV(SDL_mutex *mutex); Description Unlocks the mutex, which was previously created with SDL_CreateMutex. Returns 0 on success, or -1 on an error. SDL also defines a macro #define SDL_UnlockMutex(m) SDL_mutexV(m). See Also SDL_CreateMutex, SDL_mutexP

SDL_mutexP – Lock a mutex Synopsis #include "SDL.h" #include "SDL_thread.h" int SDL_mutexP(SDL_mutex *mutex); Description Locks the mutex, which was previously created with SDL_CreateMutex. If the mutex is already locked then SDL_mutexP will not return until it is unlocked. Returns 0 on success, or -1 on an error. SDL also defines a macro #define SDL_LockMutex(m) SDL_mutexP(m)….

SDL_keysym – Keysym structure Structure Definition typedef struct{ Uint8 scancode; SDLKey sym; SDLMod mod; Uint16 unicode; } SDL_keysym; Structure Data scancode Hardware specific scancode sym SDL virtual keysym mod Current key modifiers unicode Translated character Description The SDL_keysym structure is used by reporting key presses and releases since it is a part of the SDL_KeyboardEvent….

SDL_WasInit – Check which subsystems are initialized Synopsis #include "SDL.h" Uint32 SDL_WasInit(Uint32 flags); Description SDL_WasInit allows you to see which SDL subsytems have been initialized. flags is a bitwise OR’d combination of the subsystems you wish to check (see SDL_Init for a list of subsystem flags). Return Value SDL_WasInit returns a bitwised OR’d combination of…