Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

strsep(3)


NAME

   strsep - extract token from string

SYNOPSIS

   #include <string.h>

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

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

   strsep():
       Since glibc 2.19:
           _DEFAULT_SOURCE
       Glibc 2.19 and earlier:
           _BSD_SOURCE

DESCRIPTION

   If  *stringp  is  NULL,  the  strsep()  function  returns NULL and does
   nothing else.  Otherwise, this function finds the first  token  in  the
   string  *stringp,  that  is delimited by one of the bytes in the string
   delim.  This token is terminated by overwriting the  delimiter  with  a
   null  byte ('\0'), and *stringp is updated to point past the token.  In
   case no delimiter was found, the token is taken to be the entire string
   *stringp, and *stringp is made NULL.

RETURN VALUE

   The  strsep()  function  returns  a  pointer  to the token, that is, it
   returns the original value of *stringp.

ATTRIBUTES

   For  an  explanation  of  the  terms  used   in   this   section,   see
   attributes(7).

   
   Interface  Attribute      Value   
   
   strsep()   Thread safety  MT-Safe

CONFORMING TO

   4.4BSD.

NOTES

   The  strsep()  function  was introduced as a replacement for strtok(3),
   since the  latter  cannot  handle  empty  fields.   However,  strtok(3)
   conforms to C89/C99 and hence is more portable.

BUGS

   Be cautious when using this function.  If you do use it, note that:

   * This function modifies its first argument.

   * This function cannot be used on constant strings.

   * The identity of the delimiting character is lost.

SEE ALSO

   index(3),   memchr(3),  rindex(3),  strchr(3),  string(3),  strpbrk(3),
   strspn(3), strstr(3), strtok(3)

COLOPHON

   This page is part of release 4.09 of the Linux  man-pages  project.   A
   description  of  the project, information about reporting bugs, and the
   latest    version    of    this    page,    can     be     found     at
   https://www.kernel.org/doc/man-pages/.



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.



Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.



Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.



Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner