Section 3: library functions
NAME acquire_bitmap – Locks the bitmap before drawing onto it. Allegro game programming library. SYNOPSIS #include <allegro.h> void acquire_bitmap(BITMAP *bmp); DESCRIPTION Acquires the specified video bitmap prior to drawing onto it. You never need to call the function explicitly as it is low level, and will only give you a speed up if you know…
NAME acos, acosf, acosl – arc cosine function SYNOPSIS #include <math.h> double acos(double x); float acosf(float x); long double acosl(long double x); Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): acosf(), acosl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE DESCRIPTION These functions calculate the arc cosine of x; that is…
NAME acosh, acoshf, acoshl – inverse hyperbolic cosine function SYNOPSIS #include <math.h> double acosh(double x); float acoshf(float x); long double acoshl(long double x); Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): acosh(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 500 || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE acoshf(), acoshl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE…
NAME acosh, acoshf, acoshl – inverse hyperbolic cosine function SYNOPSIS #include <math.h> double acosh(double x); float acoshf(float x); long double acoshl(long double x); Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): acosh(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 500 || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE acoshf(), acoshl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE…
NAME acosh, acoshf, acoshl – inverse hyperbolic cosine function SYNOPSIS #include <math.h> double acosh(double x); float acoshf(float x); long double acoshl(long double x); Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): acosh(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 500 || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE acoshf(), acoshl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE…
NAME acos, acosf, acosl – arc cosine function SYNOPSIS #include <math.h> double acos(double x); float acosf(float x); long double acosl(long double x); Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): acosf(), acosl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE DESCRIPTION These functions calculate the arc cosine of x; that is…
NAME acos, acosf, acosl – arc cosine function SYNOPSIS #include <math.h> double acos(double x); float acosf(float x); long double acosl(long double x); Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): acosf(), acosl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE DESCRIPTION These functions calculate the arc cosine of x; that is…
NAME acl_valid – validate an ACL LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft int Fn acl_valid acl_t acl DESCRIPTION The Fn acl_valid function checks the ACL referred to by the argument acl for validity. The three required entries ACL_USER_OBJ, ACL_GROUP_OBJ, and ACL_OTHER must exist exactly once in the…
NAME acl_to_text – convert an ACL to text LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft char * Fn acl_to_text acl_t acl ssize_t *len_p DESCRIPTION The Fn acl_to_text function translates the ACL pointed to by the argument acl into a NULL terminated character string. If the pointer len_p is…
NAME acl_to_any_text – convert an ACL to text LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In acl/libacl.h Ft char * Fo acl_to_any_text Fa acl_t acl Fa const char *prefix Fa char separator Fa int options Fc DESCRIPTION The Fn acl_to_any_text function translates the ACL pointed to by the argument acl into…
NAME acl_size – get the size of the external representation of an ACL LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft ssize_t Fn acl_size acl_t acl DESCRIPTION The Fn acl_size function return the size, in bytes, of the buffer required to hold the exportable, contiguous, persistent form of the…
NAME acl_set_tag_type – set the tag type of an ACL entry LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft int Fn acl_set_tag_type acl_entry_t entry_d acl_tag_t tag_type DESCRIPTION The Fn acl_set_tag_type function sets the tag type of the ACL entry indicated by the argument entry_d to the value of the…
NAME acl_set_qualifier – set the qualifier of an ACL entry LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft int Fn acl_set_qualifier acl_entry_t entry_d const void *qualifier_p DESCRIPTION The Fn acl_set_qualifier function sets the qualifier of the ACL entry indicated by the argument entry_d to the value referred to by…
NAME acl_set_permset – set the permission set in an ACL entry LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft int Fn acl_set_permset acl_entry_t entry_d acl_permset_t permset_d DESCRIPTION The Fn acl_set_permset function sets the permission set of the ACL entry indicated by the argument entry_d to the permissions contained in…
NAME acl_set_file – set an ACL by filename LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft int Fn acl_set_file const char *path_p acl_type_t type acl_t acl DESCRIPTION The Fn acl_set_file function associates an access ACL with a file or directory, or associates a default ACL with a directory. The…
NAME acl_set_fd – set an ACL by file descriptor LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft int Fn acl_set_fd int fd acl_t acl DESCRIPTION The Fn acl_set_fd function associates an access ACL with the file referred to by fd The effective user ID of the process must match…
NAME acl_init – initialize ACL working storage LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft acl_t Fn acl_init int count DESCRIPTION The Fn acl_init function allocates and initializes the working storage for an ACL of at least count ACL entries. The ACL created initially contains no ACL entries. A…
NAME acl_get_tag_type – get the tag type of an ACL entry LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft int Fn acl_get_tag_type acl_entry_t entry_d acl_tag_t *tag_type_p DESCRIPTION The Fn acl_get_tag_type function assigns to the value pointed to by tag_type_p the tag type for the ACL entry indicated by the…
NAME acl_get_qualifier – retrieve the qualifier from an ACL entry LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft void * Fn acl_get_qualifier acl_entry_t entry_d DESCRIPTION The Fn acl_get_qualifier function retrieves the qualifier from the ACL entry indicated by the argument entry_d into working storage and returns a pointer to…
NAME acl_get_permset – retrieve the permission set from an ACL entry LIBRARY Linux Access Control Lists library (libacl, -lacl). SYNOPSIS In sys/types.h In sys/acl.h Ft int Fn acl_get_permset acl_entry_t entry_d acl_permset_t *permset_p DESCRIPTION The Fn acl_get_permset function returns in permset_p a descriptor to the permission set in the ACL entry indicated by entry_d Subsequent operations…