Linux C Functions List

王朝system·作者佚名 2006-01-10

Linux C Functions List - 0.01 (based on Glibc Doc and Posix Doc)

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Main Menu + Introduction Getting Started Standards and Portability ISO C POSIX (The Portable Operating System Interface) Berkeley Unix SVID (The System V Interface Description) XPG (The X/Open Portability Guide) Using the Library Header Files Macro Definitions of Functions Reserved Names Feature Test Macros Roadmap to the Manual + 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 Dynamic Memory Allocation Unconstrained Allocation Basic Memory Allocation malloc*

Examples of malloc Freeing Memory Allocated with malloc cfree

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 malloc mallinfo

Summary of malloc-Related Functions Allocation Debugging How to install the tracing functionality mtrace

muntrace

Example program excerpts Some more or less clever ideas Interpreting the traces 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

alloca Example Advantages of alloca Disadvantages of alloca GNU C Variable-Size Arrays 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*

+ 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*

Compatibility String Search Functions 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

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 Generic Charset Conversion Generic Character Set Conversion Interface iconv*

iconv_close*

iconv_open*

A complete iconv example Some Details about other iconv Implementations The iconv Implementation in the GNU C library Format of gconv-modules files Finding the conversion path in iconv iconv module data structures iconv module interfaces + Locales and Internationalization What Effects a Locale Has Choosing a Locale Categories of Activities that Locales Affect How Programs Set the Locale setlocale*

Standard Locales Accessing Locale Information localeconv: It is portable but ... localeconv*

Generic Numeric Formatting Parameters Printing the Currency Symbol Printing the Sign of a Monetary Amount Pinpoint Access to Locale Data nl_langinfo*

A dedicated function to format numbers strfmon*

Yes-or-No Questions rpmatch

+ Message Translation X/Open Message Catalog Handling The catgets function family catclose*

catgets*

catopen*

Format of the message catalog files Generate Message Catalogs files How to use the catgets interface Not using symbolic names Using symbolic names How does to this allow to develop The Uniforum approach to Message Translation The gettext family 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 gettext uses bind_textdomain_codeset

How to use gettext in GUI programs User influence on gettext Programs to handle message catalogs for gettext + Searching and Sorting Defining the Comparison Function Array Search Function bsearch*

lfind*

lsearch*

Array Sort Function qsort*

Searching and Sorting Example The hsearch function. hcreate*

hcreate_r

hdestroy

hdestroy_r

hsearch

hsearch_r

The tsearch function. tdelete*

tdestroy

tfind*

tsearch*

twalk*

Posix Functions insque*

remque*

+ Pattern Matching Wildcard Matching fnmatch*

Globbing Calling glob glob*

glob64

Flags for Globbing More Flags for Globbing globfree

globfree64

Regular Expression Matching POSIX Regular Expression Compilation regcomp*

Flags for POSIX Regular Expressions Matching a Compiled POSIX Regular Expression regexec

Match Results with Subexpressions Complications in Subexpression Matching POSIX Regexp Matching Cleanup regerror

regfree

Shell-Style Word Expansion The Stages of Word Expansion Calling wordexp wordexp*

wordfree

Flags for Word Expansion wordexp Example Details of Tilde Expansion Details of Variable Substitution + Input/Output Overview Input/Output Concepts Streams and File Descriptors File Position File Names Directories File Name Resolution File Name Errors Portability of File Names + 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 ungetc To Do Unreading ungetc*

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 printf Extension Example Predefined printf Handlers printf_size

printf_size_info

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 Custom Streams and Cookies fopencookie

Custom Stream Hook Functions Formatted Messages Printing Formatted Messages fmtmsg*

Adding Severity Classes addseverity

How to use fmtmsg and addseverity + 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 Linked Channels Independent Channels Cleaning Streams fclean

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

Control Operations on Files fcntl*

Duplicating Descriptors dup*

dup2

File Descriptor Flags File Status Flags File Access Modes Open-time Flags I/O Operating Modes Getting and Setting 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

+ 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 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

+ 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

+ 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 Local Namespace Concepts Details of Local Namespace SUN_LEN

Example of Local-Namespace Sockets 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*

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 Byte Stream Socket Example Byte Stream Connection Server Example Out-of-Band Data Datagram Socket Operations Sending Datagrams sendto*

Receiving Datagrams recvfrom*

Datagram Socket Example Example of Reading Datagrams The inetd Daemon inetd Servers Configuring inetd Socket Options Socket Option Functions getsockopt*

setsockopt*

Socket-Level Options 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*

Sys V IPC ftok*

Message Queue msgctl*

msgget*

msgrcv*

msgsnd*

Semaphore semctl*

semget*

semop*

Shared Memory shmat*

shmctl*

shmdt*

shmget*

Syscall sys_ipc

sys_mq_open

sys_mq_unlink

sys_mq_timedsend

sys_mq_timedreceive

sys_mq_notify

sys_mq_getsetattr

sys_futex

+ 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 Characters for Input Editing Characters that Cause Signals Special Characters for Flow Control Other 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

Posix Functions posix_openpt*

+ Syslog Overview of Syslog Submitting Syslog Messages openlog openlog*

syslog, vsyslog syslog*

vsyslog

closelog closelog*

setlogmask setlogmask*

Syslog Example 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

j1f

j1l

jnf

jnl

lgamma*

lgamma_r

lgammaf

lgammaf_r

lgammal

lgammal_r

tgamma*

tgammaf

tgammal

y0*

y0f

y0l

y1f

y1l

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

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 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

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*

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*

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

Specifying the Time Zone with TZ Functions and Variables for Time Zones tzset*

Time Functions Example 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 Using 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

+ 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 Some Kinds of Signals Concepts of Signal Generation How Signals Are Delivered Standard Signals Program Error Signals Termination Signals Alarm Signals Asynchronous I/O Signals Job Control Signals Operation Error Signals Miscellaneous Signals Signal Messages psignal

strsignal

Specifying Signal Actions Basic Signal Handling signal*

ssignal

sysv_signal

Advanced Signal Handling sigaction*

Interaction of signal and sigaction sigaction Function Example Flags for sigaction Initial Signal Actions Defining Signal Handlers Signal Handlers that Return Handlers That Terminate the Process Nonlocal Control Transfer in Handlers Signals Arriving While a Handler Runs Signals Close Together Merge into One Signal Handling and Nonreentrant Functions Atomic Data Access and Signal Handling Problems with Non-Atomic Access Atomic Types Atomic Usage Patterns Primitives Interrupted by Signals TEMP_FAILURE_RETRY

Generating Signals Signaling Yourself gsignal

raise*

Signaling Another Process kill*

killpg*

Permission for using kill Using kill for Communication 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 pause pause*

Problems with pause Using sigsuspend sigsuspend*

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

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

Program Argument Syntax Conventions Parsing Program Arguments Parsing program options using getopt Using the getopt function getopt*

Example of Parsing Arguments with getopt Parsing Long Options with getopt_long getopt_long

getopt_long_only

Example of Parsing Long Options with getopt_long Parsing Program Options with Argp argp_parse

The argp_parse Function Argp Global Variables Specifying Argp Parsers Specifying Options in an Argp Parser Flags for Argp Options 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 Special Keys for Argp Help Filter Functions The argp_help Function argp_help

Flags for the argp_help Function Argp Examples A Minimal Program Using Argp A Program Using Argp with Only Default Options A Program Using Argp with User Options A Program Using Multiple Combined Argp Parsers Argp User Customization Parsing of Suboptions getsubopt*

Parsing of Suboptions Example Environment Variables Environment Access clearenv

getenv*

putenv*

setenv*

unsetenv*

Standard Environment Variables System Calls syscall

Program Termination Normal Termination exit*

Exit Status Cleanups on Exit atexit*

on_exit

Aborting a Program abort*

Termination Internals _Exit*

_exit*

Posix Functions optarg*

+ 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

+ 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 Data Structures for the Shell Initializing the Shell Launching Jobs Foreground and Background Stopped and Terminated Jobs Continuing Stopped Jobs The Missing Pieces 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*

Syscall sys_setpgid

sys_getpgrp

sys_setsid

sys_getpgid

sys_getsid

+ System Databases and Name Service Switch NSS Basics The NSS Configuration File Services in the NSS configuration File Actions in the NSS configuration notfound

success

tryagain

unavail

Notes on the NSS Configuration File NSS Module Internals The Naming Scheme of the NSS Modules The Interface of the Function in NSS Modules Extending NSS Adding another Service to NSS Internals of the NSS Module Functions + 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

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 fstab file endfsent

getfsent

getfsfile

getfsspec

setfsent

The mtab file addmntent

endmntent

getmntent

getmntent_r

hasmntopt

setmntent

Other (Non-libc) Sources of Mount Information Mount, Unmount, Remount mount

umount

umount2

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

+ System Configuration Parameters General Capacity Limits Overall System Options Which Version of POSIX is Supported Using sysconf Definition of sysconf sysconf*

Constants for sysconf Parameters Examples of sysconf Minimum Values for General Capacity Limits Limits on File System Capacity Optional Features in File Support Minimum Values for File System Limits Using pathconf fpathconf*

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

+ 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

+ C Language Facilities in the Library Explicitly Checking Internal Consistency assert*

assert_perror

Variadic Functions Why Variadic Functions are Used How Variadic Functions are Defined and Used Syntax for Variable Arguments Receiving the Argument Values How Many Arguments Were Supplied Calling Variadic Functions Argument Access Macros __va_copy

va_arg*

va_end

Example of a Variadic Function Old-Style Variadic Functions va_alist

va_dcl

va_start

Null Pointer Constant Important Data Types Data Type Measurements Computing the Width of an Integer Data Type Range of an Integer Type Floating Type Macros Floating Point Representation Concepts Floating Point Parameters IEEE Floating Point Structure Field Offset Measurement offsetof

Summary of Library Facilities + Installing the GNU C Library Configuring and compiling GNU Libc Installing the C Library Recommended Tools for Compilation Supported Configurations Specific advice for GNU/Linux systems Reporting Bugs + Library Maintenance Adding New Functions Porting the GNU C Library Layout of the sysdeps Directory Hierarchy Porting the GNU C Library to Unix Systems Contributors to the GNU C Library Free Software Needs Free Documentation + GNU Lesser General Public License Preamble How to Apply These Terms to Your New Libraries + GNU Free Documentation License ADDENDUM: How to use this License for your documents 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.

http://www.gnu.org/software/libc/libc.html

Posix doc

The Open Group Base Specifications Issue 6 - IEEE Std 1003.1, 2004 Edition

http://www.opengroup.org/onlinepubs/009695399/toc.htm

func-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 @