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.Dd August 14, 2003
.Dt ECALLOC 3
.Os
.Sh NAME
.Nm ecalloc ,
.Nm emalloc ,
.Nm eread ,
.Nm erealloc ,
.Nm esetenv ,
.Nm estrdup ,
.Nm ewrite
.Nd exit-on-failure wrapper functions
.Sh LIBRARY
The roken library (libroken, -lroken)
.Sh SYNOPSIS
.Fd #include <roken.h>
.Ft "void *"
.Fn ecalloc "size_t number" "size_t size"
.Ft "void *"
.Fn emalloc "size_t sz"
.Ft ssize_t
.Fn eread "int fd" "void *buf" "size_t nbytes"
.Ft "void *"
.Fn erealloc "void *ptr" "size_t sz"
.Ft void
.Fn esetenv "const char *var" "const char *val" "int rewrite"
.Ft "char *"
.Fn estrdup "const char *str"
.Ft ssize_t
.Fn ewrite "int fd" "const void *buf" "size_t nbytes"
.Sh DESCRIPTION
These functions do the same as the ones without the
.Dq e
prefix, but if there is an error they will print a message with
.Xr errx 3 ,
and exit. For
.Nm eread
and
.Nm ewrite
this is also true for partial data.
.Pp
This is useful in applications when there is no need for a more
advanced failure mode.
.Sh SEE ALSO
.Xr read 2 ,
.Xr write 2 ,
.Xr calloc 3 ,
.Xr errx 3 ,
.Xr malloc 3 ,
.Xr realloc 3 ,
.Xr setenv 3 ,
.Xr strdup 3