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author | Tom Ryder <tom@sanctum.geek.nz> | 2017-04-05 20:06:39 +1200 |
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committer | Tom Ryder <tom@sanctum.geek.nz> | 2017-04-05 20:46:47 +1200 |
commit | c8ab406749124d2e762ad5cf53963070113afd0f (patch) | |
tree | 54c9721a06957ebe7098a211eea803b0230c0f5d /bin/u2d.sh | |
parent | Handle POSIX correctness in ~/.bash_profile (diff) | |
download | dotfiles-c8ab406749124d2e762ad5cf53963070113afd0f.tar.gz dotfiles-c8ab406749124d2e762ad5cf53963070113afd0f.zip |
Apply runtime shebanging to POSIX shell
Diffstat (limited to 'bin/u2d.sh')
-rw-r--r-- | bin/u2d.sh | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/bin/u2d.sh b/bin/u2d.sh new file mode 100644 index 00000000..9f4e800a --- /dev/null +++ b/bin/u2d.sh @@ -0,0 +1,26 @@ +# Convert UNIX line endings to DOS ones + +# Check arguments +if [ "$#" -eq 0 ] ; then + printf >&2 'u2d: Need a filename\n' + exit 2 +fi + +# Put a carriage return into a variable for convenience +r=$(printf '\r') + +# Iterate over arguments and apply the same ed(1) script to each of them +for fn ; do + + # Note the heredoc WORD is intentionally unquoted because we want to expand + # $r within it to get a literal carriage return; the escape characters + # prescribed for ed(1) by POSIX are very limited + ed -s -- "$fn" <<EOF || ex=1 +g/[^$r]\$/ s/\$/$r/ +g/^\$/ s/\$/$r/ +w +EOF +done + +# If any of the ed(1) commands failed, we should exit with 1 +exit "${ex:-0}" |