mail.1

来自「minix操作系统最新版本（3.1.1）的源代码」· 1 代码 · 共 99 行

.TH MAIL 1
.SH NAME
mail \- send and receive electronic mail
.SH SYNOPSIS
\fBmail\fR [\fB\-epqr\fR] [\fB\-f\fR \fIfile\fR] 
.br
\fBmail\fR [\fB\-dtv\fR] [\fB\-s\fR \fIsubject\fR] \fIuser\fR [...]
.br
.de FL
.TP
\\fB\\$1\\fR
\\$2
..
.de EX
.TP 20
\\fB\\$1\\fR
# \\$2
..
.SH OPTIONS 
.FL "\-e" "Exit with status TRUE or FALSE to indicate if there is mail in mailbox"
.FL "\-p" "Print all mail and then exit"
.FL "\-q" "Quit program if SIGINT received"
.FL "\-r" "Reverse print order, i.e., print oldest first"
.FL "\-f" "Use \fIfile\fR instead of \fI/usr/spool/mail/user\fR as mailbox"
.PP
.FL "\-d" "Force use of the shell variable \fIMAILER\fR"
.FL "\-t" "Show distribution list as Dist: header in message"
.FL "\-v" "Verbose mode (passed on to \fIMAILER\fR)"
.FL "\-s" "Use Subject: \fIsubject\fR"
.SH EXAMPLES
.EX "mail ast" "Send a message to \fIast\fR"
.EX "mail" "Read your mail"
.EX "cat mail.cdiff | mail -s ''Here's the diff!'' asw " "Pipe program output to mail with a subject line"
.EX "mail -f /usr/spool/mail/asw" "How root can read asw's mail"
.SH DESCRIPTION
.PP
\fIMail\fR is an extremely simple electronic mail program.  It can be used
to send or receive email on a single 
\s-1MINIX 3\s-1
system, in which case it functions
as user agent and local delivery agent.  
If the flag \fIMAILER\fR is defined in \fImail.c\fR,
it can also call a trans\%port agent to handle remote mail as well.
No such agent is supplied with
\s-1MINIX 3\s-1.
.PP
When called by \fIuser\fR with no arguments, it examines the mailbox
\fI/usr/spool/mail/user\fR, prints one message (depending on the \fB\-r\fR
flag), and waits for one of the following commands:
.PP
.nf
.ta 0.25i 1.25i
	<newline>	Go to the next message
	\-	Print the previous message
	!command	Fork off a shell and execute \fIcommand\fR
	CTRL-D	Update the mailbox and quit (same as q)
	d	Delete the current message and go to the next one
	q	Update the mailbox and quit (same as CTRL-D)
	p	Print the current message again
	s [\fIfile\fR]	Save message in the named file
	x	Exit without updating the mailbox
.PP
.PP
To send mail, the program is called with the name of one or more recipients as
arguments.  The mail is sent, along with a postmark line containing the date.
For local delivery, a file named after each recipient in the directory
\fI/usr/spool/mail\fR must be writable. If a spool file does not exist for
a recipient it will be created.
.PP
If the directory \fI/usr/spool/mail\fR does not exist then the mail is
dumped on the console, so that system programs have a way to notify
a user on a system that does not have a mail spool.
.PP
The received mail contains a To: header showing the recipient. If there
are multiple recipients and the \fB\-t\fR option is specified each recipient 
will also see a Dist: header line showing the other recipients.
.PP
The \fB\-s\fR option allows a subject to be specified. The subject must be 
quoted if it contains spaces. If no subject is specified the mail
will be delivered with Subject: No subject.
.SH NOTES
The \fB\-s\fR option was added to make this simple mail program
consistent with mail programs found in other *nix variants.  Many
programs, including the version of cron distributed with MINIX 3 releases
2.0.3 and later, report their outcome by piping output to the mail
program in order to send a mail message to root in lieu of writing a
log file.  Such programs often expect the mail program to accept a
subject line using this option.
.SH BUGS
If an external \fIMAILER\fR is used it is likely the conditional code 
supporting this will need some editing to be made to work correctly.
.SH AUTHOR
The original mail program for MINIX 3 was written by Peter B. Housel.
The -e and -t options were added by C. W. Rose. The -s option was added
by A. S. Woodhull. This man page revised by ASW 2003-07-18.