4fe954c148
It is perfectly valid to start a regex with ^ and have other patterns
with \| that can match more than once, e.g. the following example
should print ca, as illustrated with gnu sed:
$ echo 'abca' | sed -e 's/^a\|b//g'
ca
busybox before patch:
$ echo 'abca' | busybox sed -e 's/^a\|b//g'
bca
busybox after patch:
$ echo 'abca' | ./busybox sed -e 's/^a\|b//g'
ca
regcomp handles ^ perfectly well as illustrated with the second 'a' that
did not match in the example, we ca leave the non-repeating to it if
appropriate.
The check had been added before using regcomp and was required at the
time (
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| .. | ||
| awk.c | ||
| cmp.c | ||
| Config.src | ||
| diff.c | ||
| ed.c | ||
| Kbuild.src | ||
| patch_bbox.c | ||
| patch_toybox.c | ||
| patch.c | ||
| sed_summary.htm | ||
| sed.c | ||
| sed1line.txt | ||
| vi.c | ||