Language Ccpp Cref Man Unsetenv.htm

 <TITLE>unsetenv</TITLE>
<body bgcolor="#ffffcc">
<hr>
<pre>



<h3>SETENV(3)           Linux Programmer's Manual           SETENV(3)
</h3>

<h3>NAME
</h3>       setenv - change or add an environment variable

<h3>SYNOPSIS
</h3>       #include &lt;stdlib.h&gt;

       int setenv(const char *name, const char *value, int overwrite);

       void unsetenv(const char *name);

<h3>DESCRIPTION
</h3>       The  setenv() function adds the variable name to the envi-
       ronment with the value value, if  name  does  not  already
       exist.   If  name  does exist in the environment, then its
       value is changed to value if  overwrite  is  non-zero;  if
       overwrite  is zero, then the value of name is not changed.

       The unsetenv() function deletes the variable name from the
       environment.

<h3>RETURN VALUE
</h3>       The  setenv()  function  returns zero on success, or -1 if
       there was insufficient space in the environment.

<h3>CONFORMING TO
</h3>       BSD 4.3

</pre>
<hr>
<h3>SEE ALSO
</h3><p>
<a href=getenv.htm>getenv</a>, 
<a href=putenv.htm>putenv</a>, 
<pre>




























<h3>BSD                       April 4, 1993                         1
</h3>


</pre>
<P>
<hr>
<p>
<center>
<table border=2 width=80%>
<tr align=center>
<td width=25%>
<a href=../index.htm>Top</a>
</td><td width=25%>
<a href=../master_index.html>Master Index</a>
</td><td width=25%>
<a href=../SYNTAX/keywords.html>Keywords</a>
</td><td width=25%>
<a href=../FUNCTIONS/index.htm>Functions</a>
</td>
</tr>
</table>
</center>
<p>
<hr>

This manual page was brought to you by <i>mjl_man V-2.0</i>

file: /Techref/language/ccpp/cref/MAN/unsetenv.htm, 1KB, , updated: 2003/3/20 09:40, local time: 2024/11/29 22:55,

^{3.144.108.200:LOG IN}

©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?

Please DO link to this page! Digg it! / MAKE!

<A HREF="http://techref.massmind.org/Techref/language/ccpp/cref/MAN/unsetenv.htm"> unsetenv</A>

Did you find what you needed?

Language Ccpp Cref Man Unsetenv.htm

Welcome to massmind.org!

Welcome to techref.massmind.org!