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function: restore '%self' functionality for --on-process-exit

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One key use of process expansion, used in currently-shipped code, is for running a function on
current shell exit.

Restore the use of %self as a valid argument (and add `self`) and document this change.

(faho: Remove bare "self")
This commit is contained in:
David Adam
2018-04-29 18:31:47 +08:00
committed by Fabian Homborg
parent 98d736f916
commit 21890ccac7
2 changed files with 8 additions and 1 deletions
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5
doc_src/function.txt
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@@ -25,7 +25,10 @@ The following options are available:
- `-j PGID` or `--on-job-exit PGID` tells fish to run this function when the job with group ID PGID exits. Instead of PGID, the string 'caller' can be specified. This is only legal when in a command substitution, and will result in the handler being triggered by the exit of the job which created this command substitution.
- `-p PID` or `--on-process-exit PID` tells fish to run this function when the fish child process with process ID PID exits.
- `-p PID` or `--on-process-exit PID` tells fish to run this function when the fish child process
with process ID PID exits. Instead of a PID, for backward compatibility,
"`%self`" can be specified as an alias for `$fish_pid`, and the function will be run when the
current fish instance exits.
- `-s` or `--on-signal SIGSPEC` tells fish to run this function when the signal SIGSPEC is delivered. SIGSPEC can be a signal number, or the signal name, such as SIGHUP (or just HUP).