Linux C Functions List
Linux C Functions List - 0.01 (based on Glibc Doc and Posix Doc)Expand All + Collapse All - Main Menu + Introduction Getting Started Standards and Portability ISO C POSIX (The Portable Operating S
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Linux C Functions List - 0.01 (based on Glibc Doc and Posix Doc)
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- Main Menu
- + Introduction
- + Error Reporting
- Checking for Errors
- Error Codes
- Error Messages
err error error_at_line errx perror* strerror* strerror_r verr verrx vwarn vwarnx warn warnx
- + Virtual Memory Allocation And Paging
- Process Memory Concepts
- Allocating Storage For Program Data
- Memory Allocation in C Programs
- Unconstrained Allocation
- Basic Memory Allocation
malloc* - Examples of
malloc - Freeing Memory Allocated with
malloccfree free* - Changing the Size of a Block
realloc* - Allocating Cleared Space
calloc* - Efficiency Considerations for
malloc - Allocating Aligned Memory Blocks
memalign posix_memalign* valloc - Malloc Tunable Parameters
mallopt - Heap Consistency Checking
mcheck mprobe - Memory Allocation Hooks
- Statistics for Memory Allocation with
mallocmallinfo - Summary of
malloc-Related Functions
- Basic Memory Allocation
- Allocation Debugging
- Obstacks
- Creating Obstacks
- Preparing for Using Obstacks
obstack_chunk_alloc obstack_chunk_free obstack_init - Allocation in an Obstack
obstack_alloc obstack_copy obstack_copy0 - Freeing Objects in an Obstack
obstack_free - Obstack Functions and Macros
- Growing Objects
obstack_1grow obstack_blank obstack_finish obstack_grow obstack_grow0 obstack_int_grow obstack_ptr_grow - Extra Fast Growing Objects
obstack_1grow_fast obstack_blank_fast obstack_int_grow_fast obstack_ptr_grow_fast obstack_room - Status of an Obstack
obstack_base obstack_next_free obstack_object_size - Alignment of Data in Obstacks
obstack_alignment_mask - Obstack Chunks
obstack_chunk_size - Summary of Obstack Functions
- Automatic Storage with Variable Size
alloca
- Resizing the Data Segment
brk sbrk - Locking Pages
- Why Lock Pages
- Locked Memory Details
- Functions To Lock And Unlock Pages
mlock* mlockall* munlock* munlockall*
- Posix Functions
posix_madvise* posix_mem_offset* mprotect* - Syscall
sys_brk sys_mprotect sys_mlock sys_munlock sys_mlockall sys_munlockall sys_madvise sys_swapon sys_swapoff sys_modify_ldt sys_mincore sys_readahead sys_fadvise64 sys_fadvise64_64 sys_remap_file_pages sys_mbind sys_get_mempolicy sys_set_mempolicy
- + Character Handling
- Classification of Characters
isalnum* isalpha* isascii* isblank* iscntrl* isdigit* isgraph* islower* isprint* ispunct* isspace* isupper* isxdigit* - Case Conversion
_tolower* _toupper* toascii* tolower* toupper* - Character class determination for wide characters
iswalnum* iswalpha* iswblank* iswcntrl* iswctype* iswdigit* iswgraph* iswlower* iswprint* iswpunct* iswspace* iswupper* iswxdigit* wctype* - Notes on using the wide character classes
- Mapping of wide characters.
towctrans* towlower* towupper* wctrans*
- Classification of Characters
- + String and Array Utilities
- Representation of Strings
- String and Array Conventions
- String Length
strlen* strnlen wcslen* wcsnlen - Copying and Concatenation
bcopy* bzero* memccpy* memcpy* memmove* mempcpy memset* stpcpy stpncpy strcat* strcpy* strdup* strdupa strncat* strncpy* strndup strndupa wcpcpy wcpncpy wcscat* wcscpy* wcsdup wcsncat* wcsncpy* wmemcpy* wmemmove* wmempcpy wmemset* - String/Array Comparison
bcmp* memcmp* strcasecmp* strcmp* strncasecmp* strncmp* strverscmp wcscasecmp wcscmp* wcsncasecmp wcsncmp* wmemcmp* - Collation Functions
strcoll* strxfrm* wcscoll* wcsxfrm* - Search Functions
index* memchr* memmem memrchr rawmemchr rindex* strcasestr strchr* strchrnul strcspn* strpbrk* strrchr* strspn* strstr* wcschr* wcschrnul wcscspn* wcspbrk* wcsrchr* wcsspn* wcsstr* wcswcs* wmemchr* - Finding Tokens in a String
basename* dirname* strsep strtok* strtok_r wcstok* - strfry
strfry - Trivial Encryption
memfrob - Encode Binary Data
a64l* l64a* - Argz and Envz Vectors
- Argz Functions
argz_add argz_add_sep argz_append argz_count argz_create argz_create_sep argz_delete argz_extract argz_insert argz_next argz_replace argz_stringify - Envz Functions
envz_add envz_entry envz_get envz_merge envz_strip
- Argz Functions
- Posix Functions
swab* wcswidth* wcwidth*
- + Character Set Handling
- Introduction to Extended Characters
- Overview about Character Handling Functions
- Restartable Multibyte Conversion Functions
- Selecting the conversion and its properties
- Representing the state of the conversion
mbsinit* - Converting Single Characters
btowc* mbrlen* mbrtowc* wcrtomb* wctob* - Converting Multibyte and Wide Character Strings
mbsnrtowcs mbsrtowcs* wcsnrtombs wcsrtombs* - A Complete Multibyte Conversion Example
- Non-reentrant Conversion Function
- Non-reentrant Conversion of Single Characters
mblen* mbtowc* wctomb* - Non-reentrant Conversion of Strings
mbstowcs* wcstombs* - States in Non-reentrant Functions
- Non-reentrant Conversion of Single Characters
- Generic Charset Conversion
- + Locales and Internationalization
- + Message Translation
- X/Open Message Catalog Handling
- The Uniforum approach to Message Translation
- The
gettextfamily of functions- What has to be done to translate a message?
dcgettext dgettext gettext - How to determine which catalog to be used
bindtextdomain textdomain - Additional functions for more complicated situations
dcngettext dngettext ngettext - How to specify the output character set
gettextusesbind_textdomain_codeset - How to use
gettextin GUI programs - User influence on
gettext
- What has to be done to translate a message?
- Programs to handle message catalogs for
gettext
- The
- + Searching and Sorting
- Defining the Comparison Function
- Array Search Function
bsearch* lfind* lsearch* - Array Sort Function
qsort* - Searching and Sorting Example
- The
hsearchfunction.hcreate* hcreate_r hdestroy hdestroy_r hsearch hsearch_r - The
tsearchfunction.tdelete* tdestroy tfind* tsearch* twalk* - Posix Functions
insque* remque*
- + Pattern Matching
- Wildcard Matching
fnmatch* - Globbing
- Calling
globglob* glob64 - Flags for Globbing
- More Flags for Globbing
globfree globfree64
- Calling
- Regular Expression Matching
- Shell-Style Word Expansion
- Wildcard Matching
- + Input/Output Overview
- + Input/Output on Streams
- Streams
- Standard Streams
- Opening Streams
__freadable __freading __fwritable __fwriting fopen* fopen64 freopen* freopen64 - Closing Streams
fclose* fcloseall - Streams and Threads
__fsetlocking flockfile* ftrylockfile* funlockfile* - Streams in Internationalized Applications
fwide* - Simple Output by Characters or Lines
fputc* fputc_unlocked fputs* fputs_unlocked fputwc* fputwc_unlocked fputws* fputws_unlocked putc* putc_unlocked* putchar* putchar_unlocked* puts* putw putwc* putwc_unlocked putwchar* putwchar_unlocked - Character Input
fgetc* fgetc_unlocked fgetwc* fgetwc_unlocked getc* getc_unlocked* getchar* getchar_unlocked* getw getwc* getwc_unlocked getwchar* getwchar_unlocked - Line-Oriented Input
fgets* fgets_unlocked fgetws* fgetws_unlocked getdelim getline gets* - Unreading
- What Unreading Means
- Using
ungetcTo Do Unreadingungetc* ungetwc*
- Block Input/Output
fread* fread_unlocked fwrite* fwrite_unlocked - Formatted Output
- Formatted Output Basics
- Output Conversion Syntax
- Table of Output Conversions
- Integer Conversions
- Floating-Point Conversions
- Other Output Conversions
- Formatted Output Functions
fprintf* fwprintf* printf* snprintf* sprintf* swprintf* wprintf* - Dynamically Allocating Formatted Output
asprintf obstack_printf - Variable Arguments Output Functions
obstack_vprintf vasprintf vfprintf* vfwprintf* vprintf* vsnprintf* vsprintf vswprintf* vwprintf* - Parsing a Template String
parse_printf_format - Example of Parsing a Template String
- Customizing
printf- Registering New Conversions
register_printf_function - Conversion Specifier Options
- Defining the Output Handler
printfExtension Example- Predefined
printfHandlersprintf_size printf_size_info
- Registering New Conversions
- Formatted Input
- Formatted Input Basics
- Input Conversion Syntax
- Table of Input Conversions
- Numeric Input Conversions
- String Input Conversions
- Dynamically Allocating String Conversions
- Other Input Conversions
- Formatted Input Functions
fscanf* fwscanf* scanf* sscanf* swscanf* wscanf* - Variable Arguments Input Functions
vfscanf* vfwscanf* vscanf* vsscanf* vswscanf* vwscanf*
- End-Of-File and Errors
feof* feof_unlocked ferror* ferror_unlocked - Recovering from errors
clearerr* clearerr_unlocked - Text and Binary Streams
- File Positioning
fseek* fseeko fseeko64 ftell* ftello ftello64 rewind* - Portable File-Position Functions
fgetpos* fgetpos64 fsetpos* fsetpos64 - Stream Buffering
- Buffering Concepts
- Flushing Buffers
__fpurge _flushlbf fflush* fflush_unlocked - Controlling Which Kind of Buffering
__fbufsize __flbf __fpending setbuf* setbuffer setlinebuf setvbuf*
- Other Kinds of Streams
- String Streams
fmemopen open_memstream - Obstack Streams
open_obstack_stream - Programming Your Own Custom Streams
- String Streams
- Formatted Messages
- Printing Formatted Messages
fmtmsg* - Adding Severity Classes
addseverity - How to use
fmtmsgandaddseverity
- Printing Formatted Messages
- + Low-Level Input/Output
- Opening and Closing Files
close* creat* creat64 open* open64 - Input and Output Primitives
pread* pread64 pwrite* pwrite64 read* write* - Setting the File Position of a Descriptor
lseek* lseek64 - Descriptors and Streams
fdopen* fileno* fileno_unlocked - Dangers of Mixing Streams and Descriptors
- Fast Scatter-Gather I/O
readv* writev* - Memory-mapped I/O
madvise mmap* mmap64 mremap msync* munmap* - Waiting for Input or Output
FD_CLR* FD_ISSET FD_SET FD_ZERO select* - Synchronizing I/O operations
fdatasync* fsync* sync* - Perform I/O Operations in Parallel
- Asynchronous Read and Write Operations
aio_read* aio_read64 aio_write* aio_write64 lio_listio* lio_listio64 - Getting the Status of AIO Operations
aio_error* aio_error64 aio_return* aio_return64 - Getting into a Consistent State
aio_fsync* aio_fsync64 aio_suspend* aio_suspend64 - Cancellation of AIO Operations
aio_cancel* aio_cancel64 - How to optimize the AIO implementation
aio_init
- Asynchronous Read and Write Operations
- Control Operations on Files
fcntl* - Duplicating Descriptors
dup* dup2 - File Descriptor Flags
- File Status Flags
- File Locks
- Interrupt-Driven Input
- Generic I/O Control operations
ioctl* - Posix Functions
getmsg* getpmsg* putmsg* isastream* fattach* fdetach* posix_fadvise* posix_fallocate* lockf* poll* pselect* posix_typed_mem_get_info* posix_typed_mem_open* - Syscall
sys_read sys_write sys_open sys_close sys_creat sys_sync sys_dup sys_ioctl sys_fcntl sys_dup2 old_mmap sys_munmap sys_fsync old_select sys_select sys_msync sys_readv sys_writev sys_fdatasync sys_mremap sys_poll sys_pread64 sys_pwrite64 sys_mmap2 sys_fcntl64 sys_llseek
- Opening and Closing Files
- + File System Interface
- Working Directory
chdir* fchdir* get_current_dir_name getcwd* getwd* - Accessing Directories
- Format of a Directory Entry
DTTOIF IFTODT - Opening a Directory Stream
dirfd opendir* - Reading and Closing a Directory Stream
closedir* readdir* readdir64 readdir64_r readdir_r - Simple Program to List a Directory
- Random Access in a Directory Stream
rewinddir* seekdir* telldir* - Scanning the Content of a Directory
alphasort alphasort64 scandir scandir64 versionsort versionsort64 - Simple Program to List a Directory, Mark II
- Format of a Directory Entry
- Working with Directory Trees
ftw* ftw64 nftw* nftw64 - Hard Links
link* - Symbolic Links
canonicalize_file_name readlink* realpath* symlink* - Deleting Files
remove* rmdir* unlink* - Renaming Files
rename* - Creating Directories
mkdir* - File Attributes
- The meaning of the File Attributes
- Reading the Attributes of a File
fstat* fstat64 lstat* lstat64 stat* stat64 - Testing the Type of a File
S_ISBLK S_ISCHR S_ISDIR S_ISFIFO S_ISLNK S_ISREG S_ISSOCK S_TYPEISMQ S_TYPEISSEM S_TYPEISSHM - File Owner
chown* fchown* - The Mode Bits for Access Permission
- How Your Access to a File is Decided
- Assigning File Permissions
chmod* fchmod* getumask umask* - Testing Permission to Access a File
access* - File Times
futimes lutimes utime* utimes* - File Size
ftruncate* ftruncate64 truncate* truncate64
- Making Special Files
mknod* - Temporary Files
mkdtemp mkstemp* mktemp* tempnam* tmpfile* tmpfile64 tmpnam* tmpnam_r - Posix Functions
fstatvfs* statvfs* lchown* - Syscall
sys_link sys_unlink sys_chdir sys_mknod sys_chmod sys_lchown16 sys_stat sys_lseek sys_mount sys_oldumount sys_fstat sys_rename sys_mkdir sys_rmdir sys_utime sys_umount sys_umask sys_symlink sys_lstat sys_readlink old_readdir sys_truncate sys_ftruncate sys_fchmod sys_fchown16 sys_fchdir sys_chown16 sys_getcwd sys_truncate64 sys_ftruncate64 sys_stat64 sys_lstat64 sys_fstat64 sys_lchown sys_fchown sys_chown sys_utimes sys_access sys_ustat sys_chroot sys_uselib sys_statfs sys_fstatfs sys_newstat sys_newlstat sys_newfstat sys_ioperm sys_iopl sys_vhangup sys_quotactl sys_bdflush sys_sysfs sys_getdents sys_getdents64 sys_flock sys_nfsservctl sys_sendfile sys_sendfile64 sys_pivot_root sys_setxattr sys_lsetxattr sys_fsetxattr sys_getxattr sys_lgetxattr sys_fgetxattr sys_listxattr sys_llistxattr sys_flistxattr sys_removexattr sys_lremovexattr sys_fremovexattr sys_io_setup sys_io_destroy sys_io_getevents sys_io_submit sys_io_cancel sys_lookup_dcookie sys_epoll_create sys_epoll_ctl sys_epoll_wait sys_statfs64 sys_fstatfs64
- Working Directory
- + Pipes and FIFOs
- Creating a Pipe
pipe* - Pipe to a Subprocess
pclose* popen* - FIFO Special Files
mkfifo* - Atomicity of Pipe I/O
- Syscall
sys_pipe
- Creating a Pipe
- + Sockets
- Socket Concepts
- Communication Styles
- Socket Addresses
- Address Formats
- Setting the Address of a Socket
bind* - Reading the Address of a Socket
getsockname*
- Interface Naming
if_freenameindex* if_indextoname* if_nameindex* if_nametoindex* - The Local Namespace
- The Internet Namespace
- Internet Socket Address Formats
- Host Addresses
- Internet Host Addresses
- Host Address Data Type
- Host Address Functions
inet_addr* inet_aton inet_lnaof inet_makeaddr inet_netof inet_network inet_ntoa inet_ntop* inet_pton - Host Names
endhostent* gethostbyaddr* gethostbyaddr_r gethostbyname gethostbyname2 gethostbyname2_r gethostbyname_r gethostent* sethostent*
- Internet Ports
- The Services Database
endservent* getservbyname* getservbyport getservent setservent* - Byte Order Conversion
htonl* htons ntohl* ntohs - Protocols Database
endprotoent* getprotobyname* getprotobynumber getprotoent setprotoent* - Internet Socket Example
- Other Namespaces
- Opening and Closing Sockets
- Creating a Socket
socket* - Closing a Socket
shutdown* - Socket Pairs
socketpair*
- Creating a Socket
- Using Sockets with Connections
- Making a Connection
connect* - Listening for Connections
listen* - Accepting Connections
accept* - Who is Connected to Me?
getpeername* - Transferring Data
- Sending Data
send* - Receiving Data
recv* - Socket Data Options
- Sending Data
- Byte Stream Socket Example
- Byte Stream Connection Server Example
- Out-of-Band Data
- Making a Connection
- Datagram Socket Operations
- The
inetdDaemon - Socket Options
- Socket Option Functions
getsockopt* setsockopt* - Socket-Level Options
- Socket Option Functions
- Networks Database
endnetent* getnetbyaddr* getnetbyname getnetent setnetent* - Posix Functions
sockatmark* sendmsg* recvmsg* freeaddrinfo* getaddrinfo* getnameinfo* gai_strerror* h_errno* - Syscall
sys_socketcall
- + InterProcess Communication
- Posix IPC
- Message Queue
mq_close* mq_getattr* mq_notify* mq_open* mq_receive* mq_send* mq_setattr* mq_timedreceive* mq_timedsend* mq_unlink* - Semaphore
sem_close* sem_open* sem_timedwait* sem_unlink* - Shared Memory
shm_open* shm_unlink*
- Message Queue
- Sys V IPC
ftok* - Message Queue
msgctl* msgget* msgrcv* msgsnd* - Semaphore
semctl* semget* semop* - Shared Memory
shmat* shmctl* shmdt* shmget*
- Message Queue
- Syscall
sys_ipc sys_mq_open sys_mq_unlink sys_mq_timedsend sys_mq_timedreceive sys_mq_notify sys_mq_getsetattr sys_futex
- Posix IPC
- + Low-Level Terminal Interface
- Identifying Terminals
isatty* ttyname* ttyname_r - I/O Queues
- Two Styles of Input: Canonical or Not
- Terminal Modes
- Terminal Mode Data Types
- Terminal Mode Functions
tcgetattr* tcsetattr* - Setting Terminal Modes Properly
- Input Modes
- Output Modes
- Control Modes
- Local Modes
- Line Speed
cfgetispeed* cfgetospeed* cfsetispeed* cfsetospeed* cfsetspeed - Special Characters
- Noncanonical Input
cfmakeraw
- BSD Terminal Modes
gtty stty - Line Control Functions
tcdrain* tcflow* tcflush* tcsendbreak* - Noncanonical Mode Example
- Pseudo-Terminals
- Allocating Pseudo-Terminals
getpt grantpt* ptsname* ptsname_r unlockpt* - Opening a Pseudo-Terminal Pair
forkpty openpty
- Allocating Pseudo-Terminals
- Posix Functions
posix_openpt*
- Identifying Terminals
- + Syslog
- Overview of Syslog
- Submitting Syslog Messages
- openlog
openlog* - syslog, vsyslog
syslog* vsyslog - closelog
closelog* - setlogmask
setlogmask* - Syslog Example
- openlog
- Syscall
sys_syslog
- + Mathematics
- Predefined Mathematical Constants
- Trigonometric Functions
ccos* ccosf ccosl* cos* cosf cosl* csin* csinf csinl* ctan* ctanf ctanl* sin* sincos sincosf sincosl sinf sinl* tan* tanf tanl* - Inverse Trigonometric Functions
acos* acosf acosl* asin* asinf asinl* atan* atan2* atan2f atan2l atanf* atanl* cacos* cacosf cacosl* casin* casinf casinl* catan* catanf catanl* - Exponentiation and Logarithms
cbrt* cbrtf cbrtl cexp* cexpf cexpl clog* clog10 clog10f clog10l clogf clogl cpow* cpowf cpowl csqrt* csqrtf csqrtl exp* exp10 exp10f exp10l exp2* exp2f exp2l expf expl expm1* expm1f expm1l hypot* hypotf hypotl ilogb* ilogbf ilogbl log* log10* log10f log10l log1p* log1pf log1pl log2* log2f log2l logb* logbf logbl logf* logl pow* pow10 pow10f pow10l powf powl sqrt* sqrtf sqrtl - Hyperbolic Functions
acosh* acoshf acoshl asinh* asinhf asinhl atanh* atanhf atanhl cacosh* cacoshf cacoshl casinh* casinhf casinhl catanh* catanhf catanhl ccosh* ccoshf ccoshl cosh* coshf coshl csinh* csinhf csinhl ctanh* ctanhf ctanhl sinh* sinhf sinhl tanh* tanhf tanhl - Special Functions
erf* erfc* erfcf erfcl erff* erfl gamma gammaf gammal j0* j0f j0l j1 j1f j1l jn jnf jnl lgamma* lgamma_r lgammaf lgammaf_r lgammal lgammal_r tgamma* tgammaf tgammal y0* y0f y0l y1 y1f y1l yn ynf ynl - Known Maximum Errors in Math Functions
- Pseudo-Random Numbers
- ISO C Random Number Functions
rand* rand_r srand* - BSD Random Number Functions
initstate* initstate_r random* random_r setstate* setstate_r srandom* srandom_r - SVID Random Number Function
drand48* drand48_r erand48* erand48_r jrand48* jrand48_r lcong48* lcong48_r lrand48* lrand48_r mrand48* mrand48_r nrand48* nrand48_r seed48* seed48_r srand48* srand48_r
- ISO C Random Number Functions
- Is Fast Code or Small Code preferred?
- Posix Functions
remquo*
- + Arithmetic Functions
- Integers
- Integer Division
div* imaxdiv* ldiv* lldiv* - Floating Point Numbers
- Floating-Point Number Classification Functions
finite finitef finitel fpclassify* isfinite* isinf* isinff isinfl isnan* isnanf isnanl isnormal* - Errors in Floating-Point Calculations
- FP Exceptions
matherr - Infinity and NaN
- Examining the FPU status word
feclearexcept* fegetexceptflag* feraiseexcept* fesetexceptflag* fetestexcept* - Error Reporting by Mathematical Functions
- FP Exceptions
- Rounding Modes
fegetround* fesetround* - Floating-Point Control Functions
fedisableexcept feenableexcept fegetenv* fegetexcept feholdexcept* fesetenv* feupdateenv* - Arithmetic Functions
- Absolute Value
abs* cabs* cabsf cabsl fabs* fabsf fabsl imaxabs* labs* llabs* - Normalization Functions
frexp* frexpf frexpl ldexp* ldexpf ldexpl scalb* scalbf scalbl scalbln* scalblnf scalblnl scalbn scalbnf scalbnl significand significandf significandl - Rounding Functions
ceil* ceilf ceill floor* floorf floorl llrint* llrintf llrintl llround* llroundf llroundl lrint* lrintf lrintl lround* lroundf lroundl modf* modff modfl nearbyint* nearbyintf nearbyintl rint* rintf rintl round* roundf roundl trunc* truncf* truncl - Remainder Functions
drem dremf dreml fmod* fmodf fmodl remainder* remainderf remainderl - Setting and modifying single bits of FP values
copysign* copysignf copysignl nan* nanf nanl nextafter* nextafterf nextafterl nexttoward nexttowardf nexttowardl signbit* - Floating-Point Comparison Functions
isgreater* isgreaterequal* isless* islessequal* islessgreater* isunordered* - Miscellaneous FP arithmetic functions
fdim* fdimf fdiml fma* fmaf fmal fmax* fmaxf fmaxl fmin* fminf fminl
- Absolute Value
- Complex Numbers
- Projections, Conjugates, and Decomposing of Complex Numbers
carg* cargf cargl cimag* cimagf cimagl conj* conjf conjl cproj* cprojf cprojl creal* crealf creall - Parsing of Numbers
- Parsing of Integers
atoi* atol* atoll strtoimax* strtol* strtoll* strtoq strtoul* strtoull strtoumax* strtouq wcstoimax* wcstol* wcstoll* wcstoq wcstoul* wcstoull wcstoumax* wcstouq - Parsing of Floats
atof* strtod* strtof strtold* wcstod* wcstof wcstold*
- Parsing of Integers
- Old-fashioned System V number-to-string functions
ecvt* ecvt_r fcvt* fcvt_r gcvt* qecvt qecvt_r qfcvt qfcvt_r qgcvt - Posix Functions
ffs*
- + Date and Time
- Time Basics
- Elapsed Time
difftime* - Processor And CPU Time
- CPU Time Inquiry
clock* - Processor Time Inquiry
times*
- CPU Time Inquiry
- Calendar Time
- Simple Calendar Time
stime time* - High-Resolution Calendar
adjtime adjtimex gettimeofday* settimeofday - Broken-down Time
gmtime* gmtime_r localtime* localtime_r mktime* timegm timelocal - High Accuracy Clock
ntp_adjtime ntp_gettime - Formatting Calendar Time
asctime* asctime_r ctime* ctime_r strftime* wcsftime* - Convert textual time and date information back
- Interpret string according to given format
strptime* - A More User-friendly Way to Parse Times and Dates
getdate* getdate_r
- Interpret string according to given format
- Specifying the Time Zone with
TZ - Functions and Variables for Time Zones
tzset* - Time Functions Example
- Simple Calendar Time
- Setting an Alarm
alarm* getitimer* setitimer* - Sleeping
nanosleep* sleep* - Posix Functions
usleep* clock_getcpuclockid* clock_getres* clock_nanosleep* clock_settime* daylight* ftime* timezone* - Syscall
sys_gettimeofday sys_settimeofday sys_setitimer sys_getitimer sys_adjtimex sys_nanosleep sys_clock_settime sys_clock_gettime sys_clock_getres sys_clock_nanosleep sys_time sys_stime sys_alarm sys_times
- + Resource Usage And Limitation
- Resource Usage
getrusage* vtimes - Limiting Resource Usage
getrlimit* getrlimit64 setrlimit* setrlimit64 ulimit* vlimit - Process CPU Priority And Scheduling
- Absolute Priority
- Realtime Scheduling
- Basic Scheduling Functions
sched_get_priority_max* sched_get_priority_min sched_getparam* sched_getscheduler* sched_rr_get_interval* sched_setparam* sched_setscheduler* sched_yield* - Traditional Scheduling
- Introduction To Traditional Scheduling
- Functions For Traditional Scheduling
getpriority* nice* setpriority*
- Limiting execution to certain CPUs
CPU_CLR CPU_ISSET CPU_SET CPU_ZERO sched_getaffinity sched_setaffinity
- Querying memory available resources
- Overview about traditional Unix memory handling
- How to get information about the memory subsystem?
get_avphys_pages get_phys_pages getpagesize
- Learn about the processors available
get_nprocs get_nprocs_conf getloadavg - Syscall
sys_nice sys_setrlimit sys_getrusage sys_getpriority sys_setpriority sys_sched_setparam sys_sched_getparam sys_sched_setscheduler sys_sched_getscheduler sys_sched_yield sys_sched_get_priority_max sys_sched_get_priority_min sys_sched_rr_get_interval sys_getrlimit sys_sched_setaffinity sys_sched_getaffinity sys_old_getrlimit sys_capget sys_capset
- Resource Usage
- + Non-Local Exits
- Introduction to Non-Local Exits
- Details of Non-Local Exits
longjmp* setjmp* - Non-Local Exits and Signals
siglongjmp* sigsetjmp* - Complete Context Control
getcontext* makecontext* setcontext* swapcontext* - Posix Functions
_longjmp*
- + Signal Handling
- Basic Concepts of Signals
- Standard Signals
- Specifying Signal Actions
- Basic Signal Handling
signal* ssignal sysv_signal - Advanced Signal Handling
sigaction* - Interaction of
signalandsigaction sigactionFunction Example- Flags for
sigaction - Initial Signal Actions
- Basic Signal Handling
- Defining Signal Handlers
- Primitives Interrupted by Signals
TEMP_FAILURE_RETRY - Generating Signals
- Signaling Yourself
gsignal raise* - Signaling Another Process
kill* killpg* - Permission for using
kill - Using
killfor Communication
- Signaling Yourself
- Blocking Signals
- Why Blocking Signals is Useful
- Signal Sets
sigaddset* sigdelset* sigemptyset* sigfillset* sigismember* - Process Signal Mask
sigprocmask* - Blocking to Test for Delivery of a Signal
- Blocking Signals for a Handler
- Checking for Pending Signals
sigpending* - Remembering a Signal to Act On Later
- Waiting for a Signal
- Using
pausepause* - Problems with
pause - Using
sigsuspendsigsuspend*
- Using
- Using a Separate Signal Stack
sigaltstack* sigstack - BSD Signal Handling
- BSD Function to Establish a Handler
siginterrupt* sigvec - BSD Functions for Blocking Signals
sigblock sigmask sigpause* sigsetmask
- BSD Function to Establish a Handler
- Posix Functions
bsd_signal* sighold* sigqueue* sigrelse* sigtimedwait* sigwaitinfo* timer_create* timer_delete* timer_getoverrun* ualarm* - Syscall
sys_pause sys_kill sys_signal sys_sigaction sys_sigsuspend sys_sigpending sys_sigprocmask sys_sigaltstack sys_timer_create sys_timer_settime sys_timer_gettime sys_timer_getoverrun sys_timer_delete sys_sgetmask sys_ssetmask sys_sigreturn sys_rt_sigreturn sys_rt_sigaction sys_rt_sigprocmask sys_rt_sigpending sys_rt_sigtimedwait sys_rt_sigqueueinfo sys_rt_sigsuspend sys_gettid sys_tkill sys_tgkill
- + The Basic Program/System Interface
- Program Arguments
main - Parsing program options using
getopt- Using the
getoptfunctiongetopt* - Example of Parsing Arguments with
getopt - Parsing Long Options with
getopt_longgetopt_long getopt_long_only - Example of Parsing Long Options with
getopt_long
- Using the
- Parsing Program Options with Argp
argp_parse - The
argp_parseFunction - Argp Global Variables
- Specifying Argp Parsers
- Specifying Options in an Argp Parser
- Argp Parser Functions
- Special Keys for Argp Parser Functions
- Functions For Use in Argp Parsers
argp_error argp_failure argp_state_help argp_usage - Argp Parsing State
- Combining Multiple Argp Parsers
- Flags for
argp_parse - Customizing Argp Help Output
- The
argp_helpFunctionargp_help - Flags for the
argp_helpFunction - Argp Examples
- Argp User Customization
- Parsing of Suboptions
getsubopt*
- Parsing of Suboptions
- Parsing of Suboptions Example
- The
- Environment Variables
- Environment Access
clearenv getenv* putenv* setenv* unsetenv* - Standard Environment Variables
- Environment Access
- System Calls
syscall - Program Termination
- Normal Termination
exit* - Exit Status
- Cleanups on Exit
atexit* on_exit - Aborting a Program
abort* - Termination Internals
_Exit* _exit*
- Normal Termination
- Posix Functions
optarg*
- Program Arguments
- + Processes
- Running a Command
system* - Process Creation Concepts
- Process Identification
getpid* getppid* - Creating a Process
fork* vfork* - Executing a File
execl execle execlp execv execve execvp - Process Completion
wait* wait4 waitpid* - Process Completion Status
WCOREDUMP WEXITSTATUS WIFEXITED WIFSIGNALED WIFSTOPPED WSTOPSIG WTERMSIG - BSD Process Wait Functions
wait3 - Process Creation Example
- Posix Functions
environ* waitid* - Posix Functions - Dynamic Library
dlclose* dlerror* dlopen* dlsym* - Posix Functions _spawn
posix_spawn* posix_spawn_file_actions_addclose* posix_spawn_file_actions_adddup2* posix_spawn_file_actions_addopen* posix_spawn_file_actions_destroy* posix_spawnattr_destroy* posix_spawnattr_getflags* posix_spawnattr_getpgroup* posix_spawnattr_getschedparam* posix_spawnattr_getschedpolicy* posix_spawnattr_getsigdefault* posix_spawnattr_getsigmask* posix_spawnattr_init* posix_spawnattr_setflags* posix_spawnattr_setpgroup* posix_spawnattr_setschedparam* posix_spawnattr_setschedpolicy* posix_spawnattr_setsigdefault* posix_spawnattr_setsigmask* posix_spawnp* - Syscall
sys_exit sys_fork sys_waitpid sys_execve sys_getpid sys_getppid sys_wait4 sys_vfork sys_waitid sys_clone sys_personality sys_set_tid_address
- Running a Command
- + Job Control
- Concepts of Job Control
- Job Control is Optional
- Controlling Terminal of a Process
- Access to the Controlling Terminal
- Orphaned Process Groups
- Implementing a Job Control Shell
- Functions for Job Control
- Identifying the Controlling Terminal
ctermid* - Process Group Functions
getpgid* getpgrp* getsid* setpgid* setpgrp* setsid* - Functions for Controlling Terminal Access
tcgetpgrp* tcgetsid* tcsetpgrp*
- Identifying the Controlling Terminal
- Syscall
sys_setpgid sys_getpgrp sys_setsid sys_getpgid sys_getsid
- + System Databases and Name Service Switch
- + Users and Groups
- User and Group IDs
- The Persona of a Process
- Why Change the Persona of a Process?
- How an Application Can Change Persona
- Reading the Persona of a Process
getegid* geteuid* getgid* getgroups* getuid* - Setting the User ID
seteuid* setreuid* setuid* - Setting the Group IDs
getgrouplist initgroups setegid* setgid* setgroups setregid* - Enabling and Disabling Setuid Access
- Setuid Program Example
- Tips for Writing Setuid Programs
- Identifying Who Logged In
cuserid getlogin* - The User Accounting Database
- Manipulating the User Accounting Database
endutent getutent getutent_r getutid getutid_r getutline getutline_r pututline setutent updwtmp utmpname - XPG User Accounting Database Functions
endutxent* getutmp getutmpx getutxent* getutxid getutxline pututxline* setutxent* utmpxname - Logging In and Out
login login_tty logout logwtmp
- Manipulating the User Accounting Database
- User Database
- The Data Structure that Describes a User
- Looking Up One User
getpwnam* getpwnam_r getpwuid* getpwuid_r - Scanning the List of All Users
endpwent* fgetpwent fgetpwent_r getpwent* getpwent_r setpwent* - Writing a User Entry
putpwent
- Group Database
- The Data Structure for a Group
- Looking Up One Group
getgrgid* getgrgid_r getgrnam* getgrnam_r - Scanning the List of All Groups
endgrent* fgetgrent fgetgrent_r getgrent* getgrent_r setgrent*
- User and Group Database Example
- Netgroup Database
- Netgroup Data
- Looking up one Netgroup
endnetgrent getnetgrent getnetgrent_r setnetgrent - Testing for Netgroup Membership
innetgr
- Syscall
sys_setuid16 sys_getuid16 sys_setgid16 sys_getgid16 sys_geteuid16 sys_getegid16 sys_setreuid16 sys_setregid16 sys_getgroups16 sys_setgroups16 sys_getuid sys_getgid sys_geteuid sys_getegid sys_setreuid sys_setregid sys_getgroups sys_setgroups sys_setuid sys_setgid sys_newuname sys_olduname sys_setfsuid16 sys_setfsgid16 sys_setresuid16 sys_getresuid16 sys_setresgid16 sys_getresgid16 sys_setresuid sys_getresuid sys_setresgid sys_getresgid sys_setfsuid sys_setfsgid
- + System Management
- Host Identification
getdomainnname gethostid* gethostname* setdomainname sethostid sethostname - Platform Type Identification
uname* - Controlling and Querying Mounts
- Mount Information
- The
fstabfileendfsent getfsent getfsfile getfsspec setfsent - The
mtabfileaddmntent endmntent getmntent getmntent_r hasmntopt setmntent - Other (Non-libc) Sources of Mount Information
- The
- Mount, Unmount, Remount
mount umount umount2
- Mount Information
- System Parameters
sysctl - Syscall
sys_sethostname sys_uname sys_setdomainname sys_sysctl sys_restart_syscall sys_vm86old sys_reboot sys_sysinfo sys_init_module sys_delete_module sys_vm86 sys_prctl sys_acct
- Host Identification
- + System Configuration Parameters
- General Capacity Limits
- Overall System Options
- Which Version of POSIX is Supported
- Using
sysconf - Minimum Values for General Capacity Limits
- Limits on File System Capacity
- Optional Features in File Support
- Minimum Values for File System Limits
- Using
pathconffpathconf* pathconf* - Utility Program Capacity Limits
- Minimum Values for Utility Limits
- String-Valued Parameters
confstr*
- + DES Encryption and Password Handling
- Legal Problems
- Reading Passwords
getpass - Encrypting Passwords
crypt* crypt_r - DES Encryption
cbc_crypt DES_FAILED des_setparity ecb_crypt encrypt* encrypt_r setkey* setkey_r
- + Debugging support
- Backtraces
backtrace backtrace_symbols backtrace_symbols_fd - Posix Functions
posix_trace_attr_destroy* posix_trace_attr_getclockres* posix_trace_attr_getinherited* posix_trace_attr_getlogsize* posix_trace_attr_getname* posix_trace_attr_getstreamfullpolicy* posix_trace_attr_getstreamsize* posix_trace_attr_init* posix_trace_attr_setinherited* posix_trace_attr_setlogsize* posix_trace_attr_setname* posix_trace_attr_setstreamfullpolicy* posix_trace_attr_setstreamsize* posix_trace_clear* posix_trace_close* posix_trace_create* posix_trace_event* posix_trace_eventid_equal* posix_trace_eventid_open* posix_trace_eventset_add* posix_trace_eventtypelist_getnext_id* posix_trace_flush* posix_trace_get_attr* posix_trace_get_filter* posix_trace_get_status* posix_trace_getnext_event* posix_trace_open* posix_trace_set_filter* posix_trace_shutdown* posix_trace_start* posix_trace_timedgetnext_event* posix_trace_trid_eventid_open* posix_trace_trygetnext_event* - Syscall
sys_ptrace
- Backtraces
- + POSIX Threads
- Basic Thread Operations
pthread_cancel* pthread_create* pthread_exit* pthread_join* - Thread Attributes
pthread_attr_destroy* pthread_attr_getattr pthread_attr_getdetachstate* pthread_attr_getguardsize* pthread_attr_getinheritsched* pthread_attr_getschedparam* pthread_attr_getschedpolicy* pthread_attr_getscope* pthread_attr_getstack* pthread_attr_getstackaddr* pthread_attr_getstacksize* pthread_attr_init* pthread_attr_setattr pthread_attr_setdetachstate* pthread_attr_setguardsize* pthread_attr_setinheritsched* pthread_attr_setschedparam* pthread_attr_setschedpolicy* pthread_attr_setscope* pthread_attr_setstack* pthread_attr_setstackaddr* pthread_attr_setstacksize* - Cancellation
pthread_setcancelstate* pthread_setcanceltype pthread_testcancel* - Cleanup Handlers
pthread_cleanup_pop* pthread_cleanup_pop_restore_np pthread_cleanup_push pthread_cleanup_push_defer_np - Mutexes
pthread_mutex_destroy* pthread_mutex_init* pthread_mutex_lock* pthread_mutex_timedlock* pthread_mutex_trylock* pthread_mutex_unlock pthread_mutexattr_destroy* pthread_mutexattr_gettype* pthread_mutexattr_init* pthread_mutexattr_settype* - Condition Variables
pthread_cond_broadcast* pthread_cond_destroy* pthread_cond_init pthread_cond_signal* pthread_cond_timedwait* pthread_cond_wait pthread_condattr_destroy* pthread_condattr_init* - POSIX Semaphores
sem_destroy* sem_getvalue* sem_init* sem_post* sem_trywait* sem_wait* - Thread-Specific Data
pthread_getspecific* pthread_key_create* pthread_key_delete* pthread_setspecific* - Threads and Signal Handling
pthread_kill* pthread_sigmask* sigwait* - Threads and Fork
pthread_atfork* - Streams and Fork
- Miscellaneous Thread Functions
pthread_detach* pthread_equal* pthread_getconcurrency* pthread_getschedparam* pthread_kill_other_threads_np pthread_once* pthread_self* pthread_setconcurrency* pthread_setschedparam* - Posix Functions
pthread_barrier_destroy* pthread_barrier_wait* pthread_barrierattr_destroy* pthread_barrierattr_getpshared* pthread_barrierattr_init* pthread_barrierattr_setpshared* pthread_condattr_getclock* pthread_condattr_getpshared* pthread_condattr_setclock* pthread_condattr_setpshared* pthread_getcpuclockid* pthread_mutex_getprioceiling* pthread_mutex_setprioceiling* pthread_mutexattr_getprioceiling* pthread_mutexattr_getprotocol* pthread_mutexattr_getpshared* pthread_mutexattr_setprioceiling* pthread_mutexattr_setprotocol* pthread_mutexattr_setpshared* pthread_rwlock_destroy* pthread_rwlock_rdlock* pthread_rwlock_timedrdlock* pthread_rwlock_timedwrlock* pthread_rwlock_tryrdlock* pthread_rwlock_trywrlock* pthread_rwlock_unlock* pthread_rwlock_wrlock* pthread_rwlockattr_destroy* pthread_rwlockattr_getpshared* pthread_rwlockattr_init* pthread_rwlockattr_setpshared* pthread_setschedprio* pthread_spin_destroy* pthread_spin_lock* pthread_spin_unlock* - Syscall
sys_set_thread_area sys_get_thread_area sys_exit_group
- Basic Thread Operations
- + C Language Facilities in the Library
- Explicitly Checking Internal Consistency
assert* assert_perror - Variadic Functions
- Null Pointer Constant
- Important Data Types
- Data Type Measurements
- Explicitly Checking Internal Consistency
- Summary of Library Facilities
- + Installing the GNU C Library
- + Library Maintenance
- Contributors to the GNU C Library
- Free Software Needs Free Documentation
- + GNU Lesser General Public License
- + GNU Free Documentation License
- Concept Index
- Type Index
- Function and Macro Index
- Variable and Constant Macro Index
- Program and File Index
- + Note
What this is Linux C functions list Version: 0.01 (2005.4 - 2005.8) How to use this page Paste the html content into Glibc doc "libc_entire.html" Glibc doc This is Edition 0.10, last updated 2001-07-06, of The GNU C Library Reference Manual, for Version 2.3.x.
Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
http://www.gnu.org/software/libc/libc.htmlPosix doc The Open Group Base Specifications Issue 6 - IEEE Std 1003.1, 2004 Edition
Copyright ? 2001-2004 The IEEE and The Open Group
http://www.opengroup.org/onlinepubs/009695399/toc.htmfunc-name* The function is also in Posix doc Total functions 1513 (in Glibc doc: 1335, in Posix doc: 865, only in Posix doc: 177) Report bug to lu_yi_ming(_at_)sina.com (_at_) should be @
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