z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

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Subcommands
An ed command has the form [address] command
All commands end with a newline; you must press . Most commands allow
only one command on a line, although you can modify commands by appending the
l, n, and p commands.
Subcommands generally take a maximum of zero, one, or two addresses,
depending upon the particular subcommand. In the following descriptions, we show
commands with their default addresses (that is the addresses used when you don’t
specify any addresses) in a form that shows the maximum number of permitted
addresses for the command. In any of the subcommands that take a file argument,
file can be a pathname or:
!command-line
If you use the ! form, ed runs the given command line, reading its standard output
(stdout) or writing its standard input (stdin), depending on whether the ed
command does reading or writing.
If a terminal disconnect is detected:
v If the buffer is not empty and has changed since the last write, the ed utility will
attempt to write a copy of the buffer to a file named ed.hup in the current
directory. If this write fails, ed will attempt to write a copy of the buffer to a
filename ed.hup in the directory named by the HOME environment variable. If
both these attempts fail, ed will exit without saving the buffer.
v The ed utility will not write the file to the currently remembered pathname or
return to command mode, and will terminate with the exit status of 1.
If an end-of-file is detected on standard input:
v If the ed utility is in input mode, ed will terminate input mode and return to
command mode. Any partially entered lines (that is, input text without a
terminating newline) will be saved.
v If the ed utility is in command mode, it will act as if a q command had been
entered.
ed accepts the following subcommands:
.a Appends text after the specified line. Valid addresses range from 0 (text is
placed at the beginning of the buffer, before the first line) to $ (text is placed
after the last line of the buffer). ed reads lines of text from the workstation
until a line consisting solely of an unescaped . (dot) is entered. ed sets the
current-line indicator to the last line appended.
.,.c Changes the addressed range of lines by deleting the lines and then
reading new text in the manner of the a or i subcommands. If the variable
_UNIX03 is set to YES, address 0 is valid for this subcommand and it will
be interpreted as if address 1 were specified.
.,.d Deletes the addressed range of lines. The line after the last line deleted
becomes the new current line. If you delete the last line of the buffer, ed
sets the current line to the new last line. If no lines remain in the buffer, it
sets the current line to 0.
E[file] Is similar to the e command, but ed gives no warning if you have changed
the buffer.
e [file] Replaces the contents of the current buffer with the contents of file. If you
ed
Chapter 2. Shell command descriptions 249