Linux Manuals session 3

libcurl-multi – how to use the multi interface DescriptionThis is an overview on how to use the libcurl multi interface in your C programs. There are specific man pages for each function mentioned in here. There’s also the libcurl-tutorial(3) man page for a complete tutorial to programming with libcurl and the libcurl-easy(3) man page for…

libcurl-errors – error codes in libcurl DescriptionThis man page includes most, if not all, available error codes in libcurl. Why they occur and possibly what you can do to fix the problem are also included. CURLcodeAlmost all "easy" interface functions return a CURLcode error code. No matter what, using the curl_easy_setopt(3) option CURLOPT_ERRORBUFFER is a…

libcurl-easy – easy interface overview DescriptionWhen using libcurl’s "easy" interface you init your session and get a handle (often referred to as an "easy handle"), which you use as input to the easy interface functions you use. Use curl_easy_init(3) to get the handle. You continue by setting all the options you want in the upcoming…

cap_clear, cap_clear_flag, cap_compare, cap_copy_ext, cap_copy_int, cap_free, cap_from_name, cap_from_text, cap_get_fd, cap_get_file, cap_get_flag, cap_get_pid, cap_get_proc, cap_set_fd, cap_set_file, cap_set_flag, cap_set_proc, cap_size, cap_to_name, cap_to_text, cap_get_pid, cap_dup – capability data object manipulation Synopsis#include <sys/capability.h> int cap_clear(cap_t cap_p); int cap_clear_flag(cap_t cap_p, cap_flag_t flag); int cap_compare(cap_t cap_a, cap_t cap_b); ssize_t cap_copy_ext(void *ext_p, cap_t cap_p, ssize_t size); cap_t cap_copy_int(const void *ext_p); int cap_free(void…

libblkid – block device identification library Synopsis#include <blkid.h> cc file.c -lblkid DescriptionThe libblkid library is used to identify block devices (disks) as to their content (e.g. filesystem type) as well as extracting additional information such as filesystem labels/volume names, unique identifiers/serial numbers. A common use is to allow use of LABEL= and UUID= tags instead…

libavutil – multimedia-biased utility library DescriptionThe libavutil library is a utility library to aid portable multimedia programming. It contains safe portable string functions, random number generators, data structures, additional mathematics functions, cryptography and multimedia related functionality (like enumerations for pixel and sample formats). It is not a library for code needed by both libavcodec and…

libavformat – multimedia muxing and demuxing library DescriptionThe libavformat library provides a generic framework for multiplexing and demultiplexing (muxing and demuxing) audio, video and subtitle streams. It encompasses multiple muxers and demuxers for multimedia container formats. It also supports several input and output protocols to access a media resource. See Alsoffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), ffmpeg-formats(1),…

libavfilter – multimedia filtering library DescriptionThe libavfilter library provides a generic audio/video filtering framework containing several filters, sources and sinks. See Alsoffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), ffmpeg-filters(1), libavutil(3), libswscale(3), libswresample(3), libavcodec(3), libavformat(3), libavdevice(3) AuthorsThe FFmpeg developers. For details about the authorship, see the Git history of the project (git://source.ffmpeg.org/ffmpeg), e.g. by typing the command git log…

libavdevice – multimedia device handling library DescriptionThe libavdevice library provides a generic framework for grabbing from and rendering to many common multimedia input/output devices, and supports several input and output devices, including Video4Linux2, VfW, DShow, and ALSA. See Alsoffmpeg(1), ffplay(1), ffprobe(1), ffserver(1), ffmpeg-devices(1), libavutil(3), libavcodec(3), libavformat(3) AuthorsThe FFmpeg developers. For details about the authorship, see…

libavcodec – media streams decoding and encoding library DescriptionThe libavcodec library provides a generic encoding/decoding framework and contains multiple decoders and encoders for audio, video and subtitle streams, and several bitstream filters. The shared architecture provides various services ranging from bit stream I/O to DSP optimizations, and makes it suitable for implementing robust and fast…

libauth – routines for writing nnrpd resolvers and authenticators Synopsis #include "libauth.h" struct res_info { struct sockaddr *client; struct sockaddr *local; char *clienthostname; }; struct auth_info { char *username; char *password; }; struct auth_info *get_auth_info(FILE *); struct res_info *get_res_info (FILE *); void free_auth_info(struct auth_info*); void free_res_info (struct res_info*);DescriptionThese functions provide a convenient C frontend to…

libgpsmm, libQgpsmm – C++ and QT class wrapper for the GPS daemon SynopsisC++: #include <libgpsmm> struct gps_data_t *open(char *host, char *port); struct gps_data_t *open(void); struct gps_data_t *send(char *request); struct gps_data_t *read(void); struct gps_data_t *waiting(int); struct gps_data_t *stream(unsigned intflags);Descriptionlibgpsmm and libQgpsmm are mere wrappers over libgps. The important difference between the libraries is that libgpsmm is targeted at C++…

getfilecon, fgetfilecon, lgetfilecon – get SELinux security context of a file Synopsis#include <selinux/selinux.h> int getfilecon(const char *path, char **con); int getfilecon_raw(const char *path, char **con); int lgetfilecon(const char *path, char **con); int lgetfilecon_raw(const char *path, char **con); int fgetfilecon(int fd, char **con); int fgetfilecon_raw(int fd, char **con); Descriptiongetfilecon() retrieves the context associated with the given…

getfilecon, fgetfilecon, lgetfilecon – get SELinux security context of a file Synopsis#include <selinux/selinux.h> int getfilecon(const char *path, char **con); int getfilecon_raw(const char *path, char **con); int lgetfilecon(const char *path, char **con); int lgetfilecon_raw(const char *path, char **con); int fgetfilecon(int fd, char **con); int fgetfilecon_raw(int fd, char **con); Descriptiongetfilecon() retrieves the context associated with the given…

QuantLib::Basket – Synopsis#include <ql/experimental/credit/basket.hpp> Public Member FunctionsBasket (const std::vector< std::string > &names, const std::vector< Real > &notionals, const boost::shared_ptr< Pool > pool, Real attachmentRatio=0.0, Real detachmentRatio=1.0) Size size () const const std::vector< std::string > & names () const const std::vector< Real > & notionals () const Real notional () boost::shared_ptr< Pool > pool () const…

lgamma, lgammaf, lgammal, lgamma_r, lgammaf_r, lgammal_r, signgam – log gamma function Synopsis#include <math.h> double lgamma(double x); float lgammaf(float x); long double lgammal(long double x); double lgamma_r(double x, int *signp); float lgammaf_r(float x, int *signp); long double lgammal_r(long double x, int *signp); extern int signgam;Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): lgamma():…

lgamma, lgammaf, lgammal, lgamma_r, lgammaf_r, lgammal_r, signgam – log gamma function Synopsis#include <math.h> double lgamma(double x); float lgammaf(float x); long double lgammal(long double x); double lgamma_r(double x, int *signp); float lgammaf_r(float x, int *signp); long double lgammal_r(long double x, int *signp); extern int signgam;Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): lgamma():…

lgamma, lgammaf, lgammal, lgamma_r, lgammaf_r, lgammal_r, signgam – log gamma function Synopsis#include <math.h> double lgamma(double x); float lgammaf(float x); long double lgammal(long double x); double lgamma_r(double x, int *signp); float lgammaf_r(float x, int *signp); long double lgammal_r(long double x, int *signp); extern int signgam;Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): lgamma():…

lgamma, lgammaf, lgammal, lgamma_r, lgammaf_r, lgammal_r, signgam – log gamma function Synopsis#include <math.h> double lgamma(double x); float lgammaf(float x); long double lgammal(long double x); double lgamma_r(double x, int *signp); float lgammaf_r(float x, int *signp); long double lgammal_r(long double x, int *signp); extern int signgam;Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): lgamma():…

lgamma, lgammaf, lgammal, lgamma_r, lgammaf_r, lgammal_r, signgam – log gamma function Synopsis#include <math.h> double lgamma(double x); float lgammaf(float x); long double lgammal(long double x); double lgamma_r(double x, int *signp); float lgammaf_r(float x, int *signp); long double lgammal_r(long double x, int *signp); extern int signgam;Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): lgamma():…