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diff --git a/man3/strtok.3 b/man3/strtok.3 deleted file mode 100644 index 34a90198c..000000000 --- a/man3/strtok.3 +++ /dev/null @@ -1,288 +0,0 @@ -'\" t -.\" Copyright (C) 2005, 2013 Michael Kerrisk <mtk.manpages@gmail.com> -.\" a few fragments from an earlier (1996) version by -.\" Andries Brouwer (aeb@cwi.nl) remain. -.\" -.\" SPDX-License-Identifier: Linux-man-pages-copyleft -.\" -.\" Rewritten old page, 960210, aeb@cwi.nl -.\" Updated, added strtok_r. 2000-02-13 Nicolás Lichtmaier <nick@debian.org> -.\" 2005-11-17, mtk: Substantial parts rewritten -.\" 2013-05-19, mtk: added much further detail on the operation of strtok() -.\" -.TH strtok 3 (date) "Linux man-pages (unreleased)" -.SH NAME -strtok, strtok_r \- extract tokens from strings -.SH LIBRARY -Standard C library -.RI ( libc ", " \-lc ) -.SH SYNOPSIS -.nf -.B #include <string.h> -.P -.BI "char *strtok(char *restrict " str ", const char *restrict " delim ); -.BI "char *strtok_r(char *restrict " str ", const char *restrict " delim , -.BI " char **restrict " saveptr ); -.fi -.P -.RS -4 -Feature Test Macro Requirements for glibc (see -.BR feature_test_macros (7)): -.RE -.P -.BR strtok_r (): -.nf - _POSIX_C_SOURCE - || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE -.fi -.SH DESCRIPTION -The -.BR strtok () -function breaks a string into a sequence of zero or more nonempty tokens. -On the first call to -.BR strtok (), -the string to be parsed should be -specified in -.IR str . -In each subsequent call that should parse the same string, -.I str -must be NULL. -.P -The -.I delim -argument specifies a set of bytes that -delimit the tokens in the parsed string. -The caller may specify different strings in -.I delim -in successive -calls that parse the same string. -.P -Each call to -.BR strtok () -returns a pointer to a -null-terminated string containing the next token. -This string does not include the delimiting byte. -If no more tokens are found, -.BR strtok () -returns NULL. -.P -A sequence of calls to -.BR strtok () -that operate on the same string maintains a pointer -that determines the point from which to start searching for the next token. -The first call to -.BR strtok () -sets this pointer to point to the first byte of the string. -The start of the next token is determined by scanning forward -for the next nondelimiter byte in -.IR str . -If such a byte is found, it is taken as the start of the next token. -If no such byte is found, -then there are no more tokens, and -.BR strtok () -returns NULL. -(A string that is empty or that contains only delimiters -will thus cause -.BR strtok () -to return NULL on the first call.) -.P -The end of each token is found by scanning forward until either -the next delimiter byte is found or until the -terminating null byte (\[aq]\e0\[aq]) is encountered. -If a delimiter byte is found, it is overwritten with -a null byte to terminate the current token, and -.BR strtok () -saves a pointer to the following byte; -that pointer will be used as the starting point -when searching for the next token. -In this case, -.BR strtok () -returns a pointer to the start of the found token. -.P -From the above description, -it follows that a sequence of two or more contiguous delimiter bytes in -the parsed string is considered to be a single delimiter, and that -delimiter bytes at the start or end of the string are ignored. -Put another way: the tokens returned by -.BR strtok () -are always nonempty strings. -Thus, for example, given the string "\fIaaa;;bbb,\fP", -successive calls to -.BR strtok () -that specify the delimiter string "\fI;,\fP" -would return the strings "\fIaaa\fP" and "\fIbbb\fP", -and then a null pointer. -.P -The -.BR strtok_r () -function is a reentrant version of -.BR strtok (). -The -.I saveptr -argument is a pointer to a -.I char\~* -variable that is used internally by -.BR strtok_r () -in order to maintain context between successive calls that parse the -same string. -.P -On the first call to -.BR strtok_r (), -.I str -should point to the string to be parsed, and the value of -.I *saveptr -is ignored (but see NOTES). -In subsequent calls, -.I str -should be NULL, and -.I saveptr -(and the buffer that it points to) -should be unchanged since the previous call. -.P -Different strings may be parsed concurrently using sequences of calls to -.BR strtok_r () -that specify different -.I saveptr -arguments. -.SH RETURN VALUE -The -.BR strtok () -and -.BR strtok_r () -functions return a pointer to -the next token, or NULL if there are no more tokens. -.SH ATTRIBUTES -For an explanation of the terms used in this section, see -.BR attributes (7). -.TS -allbox; -lbx lb lb -l l l. -Interface Attribute Value -T{ -.na -.nh -.BR strtok () -T} Thread safety MT-Unsafe race:strtok -T{ -.na -.nh -.BR strtok_r () -T} Thread safety MT-Safe -.TE -.SH VERSIONS -On some implementations, -.\" Tru64, according to its manual page -.I *saveptr -is required to be NULL on the first call to -.BR strtok_r () -that is being used to parse -.IR str . -.SH STANDARDS -.TP -.BR strtok () -C11, POSIX.1-2008. -.TP -.BR strtok_r () -POSIX.1-2008. -.SH HISTORY -.TP -.BR strtok () -POSIX.1-2001, C89, SVr4, 4.3BSD. -.TP -.BR strtok_r () -POSIX.1-2001. -.SH BUGS -Be cautious when using these functions. -If you do use them, note that: -.IP \[bu] 3 -These functions modify their first argument. -.IP \[bu] -These functions cannot be used on constant strings. -.IP \[bu] -The identity of the delimiting byte is lost. -.IP \[bu] -The -.BR strtok () -function uses a static buffer while parsing, so it's not thread safe. -Use -.BR strtok_r () -if this matters to you. -.SH EXAMPLES -The program below uses nested loops that employ -.BR strtok_r () -to break a string into a two-level hierarchy of tokens. -The first command-line argument specifies the string to be parsed. -The second argument specifies the delimiter byte(s) -to be used to separate that string into "major" tokens. -The third argument specifies the delimiter byte(s) -to be used to separate the "major" tokens into subtokens. -.P -An example of the output produced by this program is the following: -.P -.in +4n -.EX -.RB "$" " ./a.out \[aq]a/bbb///cc;xxx:yyy:\[aq] \[aq]:;\[aq] \[aq]/\[aq]" -1: a/bbb///cc - \-\-> a - \-\-> bbb - \-\-> cc -2: xxx - \-\-> xxx -3: yyy - \-\-> yyy -.EE -.in -.SS Program source -\& -.\" SRC BEGIN (strtok.c) -.EX -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -\& -int -main(int argc, char *argv[]) -{ - char *str1, *str2, *token, *subtoken; - char *saveptr1, *saveptr2; - int j; -\& - if (argc != 4) { - fprintf(stderr, "Usage: %s string delim subdelim\en", - argv[0]); - exit(EXIT_FAILURE); - } -\& - for (j = 1, str1 = argv[1]; ; j++, str1 = NULL) { - token = strtok_r(str1, argv[2], &saveptr1); - if (token == NULL) - break; - printf("%d: %s\en", j, token); -\& - for (str2 = token; ; str2 = NULL) { - subtoken = strtok_r(str2, argv[3], &saveptr2); - if (subtoken == NULL) - break; - printf("\et \-\-> %s\en", subtoken); - } - } -\& - exit(EXIT_SUCCESS); -} -.EE -.\" SRC END -.P -Another example program using -.BR strtok () -can be found in -.BR getaddrinfo_a (3). -.SH SEE ALSO -.BR memchr (3), -.BR strchr (3), -.BR string (3), -.BR strpbrk (3), -.BR strsep (3), -.BR strspn (3), -.BR strstr (3), -.BR wcstok (3) |