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STRING(3) FreeBSD Library Functions Manual STRING(3) NAME stpcpy, strcat, strncat, strchr, strrchr, strcmp, strncmp, strcasecmp, strncasecmp, strcpy, strncpy, strerror, strlen, strpbrk, strsep, strspn, strcspn, strstr, strtok, index, rindex - string specific functions LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <string.h> char * stpcpy(char *dst, const char *src); char * strcat(char *s, const char * append); char * strncat(char *s, const char *append, size_t count); char * strchr(const char *s, int c); char * strrchr(const char *s, int c); int strcmp(const char *s1, const char *s2); int strncmp(const char *s1, const char *s2, size_t count); int strcasecmp(const char *s1, const char *s2); int strncasecmp(const char *s1, const char *s2, size_t count); char * strcpy(char *dst, const char *src); char * strncpy(char *dst, const char *src, size_t count); char * strerror(int errno); size_t strlen(const char *s); char * strpbrk(const char *s, const char *charset); char * strsep(char **stringp, const char *delim); size_t strspn(const char *s, const char *charset); size_t strcspn(const char *s, const char *charset); char * strstr(const char *big, const char *little); char * strtok(char *s, const char *delim); char * index(const char *s, int c); char * rindex(const char *s, int c); DESCRIPTION The string functions manipulate strings 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), simd(7) 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"). FreeBSD 14.1-RELEASE-p8 September 2, 2023 FreeBSD 14.1-RELEASE-p8