From ba0a646be7f8ca36dfd6e5f6e0c5fdf3bdc14f91 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Thu, 4 Aug 2016 11:34:30 +1200
Subject: Change igex(1) into POSIX sh, simplify

---
 bin/igex        | 88 ++++++---------------------------------------------------
 man/man1/igex.1 | 17 +++++------
 2 files changed, 16 insertions(+), 89 deletions(-)

diff --git a/bin/igex b/bin/igex
index 0bd36cc0..1ca23ecf 100755
--- a/bin/igex
+++ b/bin/igex
@@ -1,82 +1,12 @@
-#!/usr/bin/env bash
+#!/bin/sh
 # Run a command and ignore specified exit values.
-self=igex
-
-# Print usage information
-usage() {
-    printf '%s: usage: %s [-hv] -i IGNORE1[,IGNORE2...] [--] COMMAND [ARG1...]\n' \
-        "$self" "$self"
-}
-
-# Array with exit values to ignore
-declare -a ignores
-ignores=()
-
-# Flag for whether to print diagnostics to stderr or not; defaults to off
-declare -i verbose
-verbose=0
-
-# Process options
-while getopts 'hvi:' opt ; do
-    case $opt in
-
-        # -h: Print help
-        h)
-            usage
-            exit 0
-            ;;
-
-        # -v: Print diagnostics to stderr
-        v)
-            verbose=1
-            ;;
-
-        # Specify the comma-delimited signals to ignore
-        i)
-            IFS=, read -a ignores < <(printf '%s\n' "$OPTARG")
-            ;;
-
-        # Unknown option
-        \?)
-            usage >&2
-            exit 2
-            ;;
-    esac
-done
-shift "$((OPTIND-1))"
-
-# Check we have at least one ignore value
-if ! ((${#ignores[@]})) ; then
-    usage >&2
-    exit 2
-fi
-
-# Check that all the ignore values are non-zero
-for ignore in "${ignores[@]}" ; do
-    ((ignore != 0)) && continue
-    usage >&2
-    exit 2
-done
-
-# Check we have some arguments left to run a command
-if ! (($#)) ; then
-    usage >&2
-    exit 2
-fi
-
-# Run the command and save its exit value
+igs=$1,
+shift
 "$@"
-ret=$?
-
-# Iterate through the ignored exit values and reset the exit value to 0 if it
-# matches any of them, including a warning to stderr if -v was specified
-for ignore in "${ignores[@]}" ; do
-    ((ret != ignore)) && continue
-    ((verbose)) && printf '%s: Ignoring exit value %u\n' \
-        "$self" "$ignore" >&2
-    ret=0
-    break
+ex=$?
+while [ -n "$igs" ] ; do
+    ig=${igs%%,*}
+    [ "$((ig == ex))" -eq 1 ] && exit 0
+    igs=${igs#*,}
 done
-
-# Exit with the determined value
-exit "$ret"
+exit "$ex"
diff --git a/man/man1/igex.1 b/man/man1/igex.1
index 1c2396d4..731041c6 100644
--- a/man/man1/igex.1
+++ b/man/man1/igex.1
@@ -1,19 +1,16 @@
-.TH IGEX 1 "February 2016" "Manual page for igex"
+.TH IGEX 1 "August 2016" "Manual page for igex"
 .SH NAME
 .B igex
 \- run a command, ignoring specified error exit values
 .SH USAGE
-.B igex [-hv] -i IGNORE1[,IGNORE2...] [--] COMMAND [ARG1...]
+.B igex VAL1[,VAL2,VAL3,...] COMMAND [ARG1...]
 .SH DESCRIPTION
 Runs the given command and checks its exit value. If it matches any of the
-ignored values given in -i, exits 0. Otherwise, exits with the command's exit
-value as normal.
+ignored values given in the first argument, exits 0. Otherwise, exits with the
+command's exit value as normal.
 .P
-Option -h gives help, option -v turns on verbose output, option -i specifies an
-the signals to ignore, comma-delimited; you must specify at least one non-zero
-integer.
-.P
-   $ igex -i1 false
-   $ igex -v -i24 rsync source dest
+   $ igex 1 false
+   $ igex 24 rsync source dest
+   $ igex 8,9 mycmd
 .SH AUTHOR
 Tom Ryder <tom@sanctum.geek.nz>
-- 
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