TH GETENV 2
SH NAME
getenv, putenv \- access environment variables
SH SYNOPSIS
B #include <u.h>
br
B #include <libc.h>
PP
nf
B
char* getenv(char *name)
br
B
int putenv(char *name, char *val)
fi
SH DESCRIPTION
I Getenv
reads the contents of
BI /env/ name
(see
IR env (3))
into memory allocated with
IR malloc (2),
0-terminates it,
and returns a pointer to that area.
If no file exists, 0
is returned.
PP
I Putenv
creates the file
BI /env/ name
and writes the string
I val
to it. The terminating
B 0
is not written.
If the file value cannot be written, \-1 is returned.
SH SOURCE
B /sys/src/libc/9sys
SH SEE ALSO
IR env (3)
SH DIAGNOSTICS
Sets
IR errstr .
