sgetopt.3

linux下qmail的源码 本人加了一些注释

.TH sgetopt 3
.SH NAME
sgetopt \- get option character from command line
.SH SYNTAX
.B #include <sgetopt.h>
.SH DESCRIPTION
The
.B sgetopt
library is just like the
.B getopt
library,
except that it prints errors using
.B substdio
rather than
.BR stdio .

See
.B getopt(3)
for interface details.
.SH VERSION
sgetopt version 1.9, 931201.
.SH AUTHOR
Placed into the public domain by Daniel J. Bernstein.
.SH "SEE ALSO"
getopt(3),
subgetopt(3),
subfd(3),
substdio(3)