The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
strnlen – determine the length of a fixed-size string Synopsis #include <string.h> size_t strnlen(const char *s, size_t maxlen); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): strnlen(): Since glibc 2.10: _POSIX_C_SOURCE >= 200809L Before glibc 2.10: _GNU_SOURCE Description The strnlen() function returns the number of bytes in the string pointed to by s, excluding the terminating null…
strneqvcmp – compare two strings with an equivalence mapping Synopsis #include <your-opts.h> cc[…] – o outfile infile.c – lopts[…] int strneqvcmp(char const *str1, char const *str2, int ct); Description Using a character mapping, two strings are compared for "equivalence". Each input character is mapped to a comparison character and the mapped-to characters are compared for…
strdup, strndup, strdupa, strndupa – duplicate a string Synopsis #include <string.h> char *strdup(const char *s); char *strndup(const char *s, size_t n); char *strdupa(const char *s); char *strndupa(const char *s, size_t n); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): strdup(): _XOPEN_SOURCE >= 500 || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE strndup(): Since glibc 2.10: _POSIX_C_SOURCE >= 200809L Before glibc 2.10:…
strdup, strndup, strdupa, strndupa – duplicate a string Synopsis #include <string.h> char *strdup(const char *s); char *strndup(const char *s, size_t n); char *strdupa(const char *s); char *strndupa(const char *s, size_t n); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): strdup(): _XOPEN_SOURCE >= 500 || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE strndup(): Since glibc 2.10: _POSIX_C_SOURCE >= 200809L Before glibc 2.10:…
strcpy, strncpy – copy a string Synopsis #include <string.h> char *strcpy(char *dest, const char *src); char *strncpy(char *dest, const char *src, size_t n); Description The strcpy() function copies the string pointed to by src, including the terminating null byte (‘
strcmp, strncmp – compare two strings Synopsis #include <string.h> int strcmp(const char *s1, const char *s2); int strncmp(const char *s1, const char *s2, size_t n); Description The strcmp() function compares the two strings s1 and s2. The locale is not taken into account (for a locale-aware comparison, see strcoll(3)). The comparison is done using unsigned…
strcat, strncat – concatenate two strings Synopsis #include <string.h> char *strcat(char *dest, const char *src); char *strncat(char *dest, const char *src, size_t n); Description The strcat() function appends the src string to the dest string, overwriting the terminating null byte (‘
strcasecmp, strncasecmp – compare two strings ignoring case Synopsis #include <strings.h> int strcasecmp(const char *s1, const char *s2); int strncasecmp(const char *s1, const char *s2, size_t n); Description The strcasecmp() function performs a byte-by-byte comparison of the strings s1 and s2, ignoring the case of the characters. It returns an integer less than, equal to,…
strmv.f – Synopsis Functions/Subroutines subroutine strmv (UPLO, TRANS, DIAG, N, A, LDA, X, INCX) STRMV Function/Subroutine Documentation subroutine strmv (characterUPLO, characterTRANS, characterDIAG, integerN, real, dimension(lda,*)A, integerLDA, real, dimension(*)X, integerINCX) STRMV Purpose: STRMV performs one of the matrix-vector operations x := A*x, or x := A**T*x, where x is an n element vector and A is…
strmv.f – Synopsis Functions/Subroutines subroutine strmv (UPLO, TRANS, DIAG, N, A, LDA, X, INCX) STRMV Function/Subroutine Documentation subroutine strmv (characterUPLO, characterTRANS, characterDIAG, integerN, real, dimension(lda,*)A, integerLDA, real, dimension(*)X, integerINCX) STRMV Purpose: STRMV performs one of the matrix-vector operations x := A*x, or x := A**T*x, where x is an n element vector and A is…
strmode – convert inode status information into a symbolic string Library Lb libbsd Synopsis In bsd/string.h Ft void Fn strmode mode_t mode char *bp Description The Fn strmode function converts a file Fa mode (the type and permission information associated with an inode, see stat(2)) into a symbolic string which is stored in the location…
strmm.f – Synopsis Functions/Subroutines subroutine strmm (SIDE, UPLO, TRANSA, DIAG, M, N, ALPHA, A, LDA, B, LDB) STRMM Function/Subroutine Documentation subroutine strmm (characterSIDE, characterUPLO, characterTRANSA, characterDIAG, integerM, integerN, realALPHA, real, dimension(lda,*)A, integerLDA, real, dimension(ldb,*)B, integerLDB) STRMM Purpose: STRMM performs one of the matrix-matrix operations B := alpha*op( A )*B, or B := alpha*B*op( A ),…
strmm.f – Synopsis Functions/Subroutines subroutine strmm (SIDE, UPLO, TRANSA, DIAG, M, N, ALPHA, A, LDA, B, LDB) STRMM Function/Subroutine Documentation subroutine strmm (characterSIDE, characterUPLO, characterTRANSA, characterDIAG, integerM, integerN, realALPHA, real, dimension(lda,*)A, integerLDA, real, dimension(ldb,*)B, integerLDB) STRMM Purpose: STRMM performs one of the matrix-matrix operations B := alpha*op( A )*B, or B := alpha*B*op( A ),…
strlen – calculate the length of a string Synopsis #include <string.h> size_t strlen(const char *s); Description The strlen() function calculates the length of the string pointed to by s, excluding the terminating null byte (‘
strlcpy strlcat – size-bounded string copying and concatenation Library Lb libbsd Synopsis In bsd/string.h Ft size_t Fn strlcpy char *dst const char *src size_t size Ft size_t Fn strlcat char *dst const char *src size_t size Description The Fn strlcpy and Fn strlcat functions copy and concatenate strings respectively. They are designed to be safer,…
strlcpy strlcat – size-bounded string copying and concatenation Library Lb libbsd Synopsis In bsd/string.h Ft size_t Fn strlcpy char *dst const char *src size_t size Ft size_t Fn strlcat char *dst const char *src size_t size Description The Fn strlcpy and Fn strlcat functions copy and concatenate strings respectively. They are designed to be safer,…
stringprep_utf8_to_unichar – API function Synopsis #include <stringprep.h> uint32_t stringprep_utf8_to_unichar(const char * p); Arguments const char * p a pointer to Unicode character encoded as UTF-8 Description Converts a sequence of bytes encoded as UTF-8 to a Unicode character. If p does not point to a valid UTF-8 encoded character, results are undefined. Return Value the…
stringprep_utf8_to_ucs4 – API function Synopsis #include <stringprep.h> uint32_t * stringprep_utf8_to_ucs4(const char * str, ssize_t len, size_t * items_written); Arguments const char * str a UTF-8 encoded string ssize_t len the maximum length of str to use. If len < 0, then the string is nul-terminated. size_t * items_written location to store the number of characters…
stringprep_utf8_to_locale – API function Synopsis #include <stringprep.h> char *stringprep_utf8_to_locale(const char *str); Arguments const char * str input zero terminated string. Description Convert string encoded in UTF-8 into the locale’s character set by using stringprep_convert(). Return Value Returns newly allocated zero-terminated string which is str transcoded into the locale’s character set. Reporting Bugs Report bugs to…
stringprep_utf8_nfkc_normalize – API function Synopsis #include <stringprep.h> char *stringprep_utf8_nfkc_normalize(const char *str, ssize_t len); Arguments const char * str a UTF-8 encoded string. ssize_t len length of str, in bytes, or -1 if str is nul-terminated. Description Converts a string into canonical form, standardizing such issues as whether a character with an accent is represented as…