Reference

string(3)

string specific functions

NAME

index, rindex, stpcpy, strcasecmp, strcat, strchr, strcmp, strcpy, strcspn, strerror, strlen, strncasecmp, strncat, strncmp, strncpy, strpbrk, strrchr, strsep, strspn, strstr, strtok – string specific functions

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <strings.h>

char *

index(const char *s, int c);

char *

rindex(const char *s, int c);

int

strcasecmp(const char *s1, const char *s2);

int

strncasecmp(const char *s1, const char *s2, size_t n);

#include <string.h>

char *

stpcpy(char *dst, const char *src);

char *

strcat(char *restrict s1, const char *restrict s2);

char *

strchr(const char *s, int c);

int

strcmp(const char *s1, const char *s2);

char *

strcpy(char *restrict s1, const char *restrict s2);

size_t

strcspn(const char *s1, const char *s2);

char *

strerror(int errnum);

size_t

strlen(const char *s);

char *

strncat(char *restrict s1, const char *restrict s2, size_t n);

int

strncmp(const char *s1, const char *s2, size_t n);

char *

strncpy(char *restrict s1, const char *restrict s2, size_t n);

char *

strpbrk(const char *s1, const char *s2);

char *

strrchr(const char *s, int c);

char *

strsep(char **stringp, const char *delim);

size_t

strspn(const char *s1, const char *s2);

char *

strstr(const char *s1, const char *s2);

char *

strtok(char *restrict s1, const char *restrict s2);

DESCRIPTION

The string functions manipulate strings that are terminated by a null byte.

See the specific manual pages for more information. For manipulating variable length generic objects as byte strings (without the null byte check), see bstring(3).

Except as noted in their specific manual pages, the string functions do not test the destination for size limitations.

SEE ALSO

bstring(3), index(3), rindex(3), stpcpy(3), strcasecmp(3), strcat(3), strchr(3), strcmp(3), strcpy(3), strcspn(3), strerror(3), strlen(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3)

STANDARDS

The strcat(), strncat(), strchr(), strrchr(), strcmp(), strncmp(), strcpy(), strncpy(), strerror(), strlen(), strpbrk(), strspn(), strcspn(), strstr(), and strtok() functions conform to ISO/IEC 9899:1990 (“ISO C90”).

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