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<TITLE>putenv</TITLE>
<body bgcolor="#ffffcc">
<hr>
<pre>
<h3>PUTENV(3) Linux Programmer's Manual PUTENV(3)
</h3>
<h3>NAME
</h3> putenv - change or add an environment variable
<h3>SYNOPSIS
</h3> #include <stdlib.h>
int putenv(const char *string);
<h3>DESCRIPTION
</h3> The putenv() function adds or changes the value of envi-
ronment variables. The argument string is of the form
name = value. If name does not already exist in the envi-
ronment, then string is added to the environment. If name
does exist, then the value of name in the environment is
changed to value.
<h3>RETURN VALUE
</h3> The putenv() function returns zero on success, or -1 if an
error occurs.
<h3>ERRORS
</h3> ENOMEM Insufficient space to allocate new environment.
<h3>CONFORMING TO
</h3> SVID 3, POSIX, BSD 4.3
</pre>
<hr>
<h3>SEE ALSO
</h3><p>
<a href=getenv.htm>getenv</a>,
<a href=setenv.htm>setenv</a>,
<a href=unsetenv.htm>unsetenv</a>,
<pre>
<h3>GNU April 8, 1993 1
</h3>
</pre>
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