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string(3c)

string(3C)               Standard C Library Functions               string(3C)

NAME
       string - string operations

SYNOPSIS
       #include <string.h>
       #include <strings.h>

DESCRIPTION
       These  functions perform various operations on strings (arrays of char‐
       acters), which are given as arguments that point to strings.  Depending
       on  the  function, strings may be either terminated by a null character
       or have a maximum length of n bytes. They are designed for use with en‐
       codings representing each character as a single byte, and all character
       counts are measured in individual bytes, even if a string  with  multi‐
       byte  characters is used. Except where noted in the individual function
       descriptions, they do not check for null  pointers,  and  programs  may
       crash if passing null or otherwise invalid pointers to these functions,
       or  specifying  sizes  larger than the memory allocation in use for the
       string. Use of adi(7) may help in detecting buffer overflows or invalid
       pointer usage in code.


       For details of the string functions, see the following man pages:

       strcat(3C)           string copying and concatenation operations


       strchr(3C)           string search operations


       strcmp(3C)           string comparison


       strcoll(3C)          string collation


       strdup(3C)           string duplication


       strerror(3C)         get error message string


       strerrordesc_np(3C)  get error name and message strings


       strlen(3C)           string length operations


       strsignal(3C)        get string describing signal


       strtok(3C)           separate strings into tokens


       strxfrm(3C)          string transformation



       For corresponding functions that operate on wide-character strings, see
       wcstring(3C).


       Multibyte strings may be handled by using mbstowcs(3C) or mbsrtowcs(3C)
       to convert the string to a wide-character string first.


       Functions specific to handling UTF-8 encoded multibyte strings are also
       available. See the  u8_strcmp(3C),  u8_textprep_str(3C),  and  u8_vali‐
       date(3C) man pages for these functions.

SEE ALSO
       mbstowcs(3C),  mbsrtowcs(3C),  memory(3C),  setlocale(3C),  stpcpy(3C),
       stpncpy(3C),  strcasecmp(3C),  strcasecmp_l(3C),  strcasestr(3C),  str‐
       cat(3C),  strcat_s(3C),  strchr(3C),  strchrnul(3C),  strcmp(3C),  str‐
       coll(3C),   strcoll_l(3C),   strcpy(3C),   strcpy_s(3C),   strcspn(3C),
       strdup(3C),  strdupa(3C),  strlcat(3C),  strlcpy(3C), strlen(3C), strn‐
       casecmp(3C),     strncasecmp_l(3C),     strncat(3C),     strncat_s(3C),
       strncmp(3C),  strncpy(3C),  strncpy_s(3C),  strndup(3C),  strndupa(3C),
       strnlen(3C),  strnlen_s(3C),  strnstr(3C),  strpbrk(3C),   strrchr(3C),
       strsep(3C),  strspn(3C),  strstr(3C),  strtok(3C),  strtok_r(3C),  str‐
       tok_s(3C),       strxfrm(3C),       strxfrm_l(3C),       u8_strcmp(3C),
       u8_textprep_str(3C), u8_validate(3C), wcstring(3C), strcadd(3GEN), str‐
       ccpy(3GEN), streadd(3GEN), strecpy(3GEN), strfind(3GEN), strrspn(3GEN),
       strtrns(3GEN)


       Appendix  E,  Security Considerations When Using C Functions, in Devel‐
       oper's Guide to Oracle Solaris 11.4 Security


       Handling Characters and Character Strings in Internationalizing and Lo‐
       calizing Applications in Oracle Solaris

NOTES
       All of these functions, except as noted in their individual man  pages,
       assume  the default "C" locale. For some locales, strxfrm(3C) should be
       applied to the strings before they are passed to the functions.

Oracle Solaris 11.4               28 Feb 2022                       string(3C)
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