mirror of https://github.com/mkerrisk/man-pages
73 lines
2.8 KiB
Groff
73 lines
2.8 KiB
Groff
.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\"
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.\" References consulted:
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.\" Linux libc source code
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.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
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.\" 386BSD man pages
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.\" Modified Sat Jul 24 18:00:10 1993 by Rik Faith (faith@cs.unc.edu)
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.\" Modified Mon Jan 20 12:04:18 1997 by Andries Brouwer (aeb@cwi.nl)
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.\" Modified Tue Jan 23 20:23:07 2001 by Andries Brouwer (aeb@cwi.nl)
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.\"
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.TH STRSEP 3 1993-04-12 "GNU" "Linux Programmer's Manual"
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.SH NAME
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strsep \- extract token from string
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.SH SYNOPSIS
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.nf
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.B #include <string.h>
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.sp
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.BI "char *strsep(char **" stringp ", const char *" delim );
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.fi
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.SH DESCRIPTION
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If *\fIstringp\fP is NULL, the \fBstrsep\fP() function returns NULL
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and does nothing else.
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Otherwise, this function finds the first token
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in the string *\fIstringp\fP, where tokens
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are delimited by symbols in the string \fIdelim\fP.
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This token is terminated with a `\\0' character
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(by overwriting the delimiter)
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and *\fIstringp\fP is updated to point past the token.
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In case no delimiter was found, the token is taken to be
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the entire string *\fIstringp\fP, and *\fIstringp\fP is made NULL.
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.SH "RETURN VALUE"
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The \fBstrsep\fP() function returns a pointer to the token,
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that is, it returns the original value of *\fIstringp\fP.
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.SH NOTES
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The \fBstrsep\fP() function was introduced as a replacement for
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\fBstrtok\fP(3), since the latter cannot handle empty fields.
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However, \fBstrtok\fP(3) conforms to C89/C99 and hence is more portable.
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.SH BUGS
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This function suffers from the same problems as \fBstrtok\fP(3).
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In particular, it modifies the original string.
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Avoid it.
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.SH "CONFORMING TO"
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4.4BSD
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.SH "SEE ALSO"
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.BR index (3),
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.BR memchr (3),
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.BR rindex (3),
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.BR strchr (3),
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.BR strpbrk (3),
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.BR strspn (3),
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.BR strstr (3),
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.BR strtok (3)
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