| № | Ф-ция | Linux | NetBSD | OpenBSD | FreeBSD | DragonFlyBSD | Solaris |
| string |  + | + | + | ||||
| strcat() | + | + | + | ||||
| strlcat() | + | + | + | ||||
| strncat() | + | + | + | ||||
| strchr() | + | + | + | ||||
| strrchr() | + | + | + | ||||
| strcmp() | + | + | + | ||||
| strncmp() | + | + | + | ||||
| strcoll() | strcoll(3) | strcoll(3) | strcoll(3) | ||||
| stpcpy() | — | — | stpcpy(3) | ||||
| strcpy() | strcpy(3) | strcpy(3) | strcpy(3) | ||||
| strlcpy() | strlcpy(3) | strlcpy(3) | strlcpy(3) | ||||
| strncpy() | strncpy(3) | strncpy(3) | strncpy(3) | ||||
| strerror() | strerror(3) | strerror(3) | strerror(3) | ||||
| strerror_r() | strerror_r(3) | strerror_r(3) | strerror_r(3) | ||||
| strlen() | strlen(3) | strlen(3) | strlen(3) | ||||
| strpbrk() | + | + | |||||
| strsep() | + | + | |||||
| stresep() | + | — | |||||
| strspn() | + | + | |||||
| strcspn() | + | + | |||||
| strdup() | + | + | |||||
| strndup() | + | — | |||||
| strstr() | + | + | |||||
| strnstr() | + | ||||||
| strcasestr() | + | + | |||||
| strtok() | + | + | |||||
| strtok_r() | + | + | |||||
| strxfrm() | + | + | + | ||||
| bstring | + | + | + | ||||
| memchr() | + | + | + | ||||
| memcmp() | + | + | + | ||||
| memccpy() | + | + | + | ||||
| memcpy() | + | + | + | ||||
| memmove() | + | + | + | ||||
| memset() | + | + | + | ||||
| memmem() | + | — | + |