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.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" References consulted:
.\" Linux libc source code
.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\" 386BSD man pages
.\" Modified Thu Apr 8 15:00:12 1993, David Metcalfe
.\" Modified Sat Jul 24 18:44:45 1993, Rik Faith (faith@cs.unc.edu)
.\" Modified Fri Feb 14 21:47:50 1997 by Andries Brouwer (aeb@cwi.nl)
.\" Translated into Spanish Thu Mar 5 15:33:46 CET 1998 by Gerardo
.\" Aburruzaga Garca <gerardo.aburruzaga@uca.es>
.\"
.TH PUTENV 3 "5 Marzo 1998" "GNU" "Manual del Programador de Linux"
.SH NOMBRE
putenv \- cambia o aade una variable de ambiente
.SH SINOPSIS
.nf
.B #include <stdlib.h>
.sp
.BI "int putenv(const char *" cadena );
.fi
.SH DESCRIPCIN
La funcin \fBputenv()\fP aade o cambia el valor de variables de
entorno o ambiente. El argumento \fIcadena\fP es de la forma
\fInombre\fP=\fIvalor\fP.
Si \fInombre\fP no existe ya en el ambiente, entonces
\fIcadena\fP se aade al entorno. Si \fInombre\fP s existe,
entonces el valor de \fInombre\fP en el ambiente se cambia a
\fIvalor\fP.
.SH "VALOR DEVUELTO"
La funcin \fBputenv()\fP devuelve cero si acaba bien, \-1 en caso
de error.
.SH ERRORES
.TP
.B ENOMEM
Espacio insuficiente para alojar el nuevo ambiente.
.SH "CONFORME A"
SVID 3, POSIX, BSD 4.3
.SH "VASE TAMBIN"
.BR getenv (3),
.BR setenv (3),
.BR unsetenv (3),
.BR environ (5)
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