diff options
Diffstat (limited to 'doc/backtick.html')
| -rw-r--r-- | doc/backtick.html | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/doc/backtick.html b/doc/backtick.html index 91e963a..e5a889d 100644 --- a/doc/backtick.html +++ b/doc/backtick.html @@ -30,7 +30,7 @@ environment variable, then executes another program. </p> <pre> - backtick [ -i | -I | -D <em>default</em> ] [ -N | -n ] [ -E | -e ] <em>variable</em> { <em>prog1...</em> } <em>prog2...</em> + backtick [ -i | -I | -d | -D <em>default</em> ] [ -N | -n ] [ -E | -e ] <em>variable</em> { <em>prog1...</em> } <em>prog2...</em> </pre> <ul> @@ -63,15 +63,17 @@ nonzero: </p> <ul> - <li> <tt>-i</tt> : backtick exits 1. </li> - <li> <tt>-I</tt> : <em>variable</em> is <strong>removed</strong> from + <li> <tt>-i</tt> : backtick exits with an +<a href="exitcodes.html">approximation</a> of <em>prog1</em>'s exit code, +or 124 if <em>prog1</em> wrote a null character. This is the default. </li> + <li> <tt>-I</tt>: the value of <em>variable</em> is set to whatever +the start of <em>prog1...</em>'s output is, up to the first null character, +or to whatever <em>prog1...</em> wrote before crashing; chomping is applied +if required; then execution proceeds. </li> + <li> <tt>-d</tt> : <em>variable</em> is <strong>removed</strong> from the environment, and execution proceeds. </li> <li> <tt>-D <em>default</em></tt> : the value of <em>variable</em> is set to <em>default</em>, and execution proceeds. </li> - <li> neither of those options: the value of <em>variable</em> is set to whatever -the start of <em>prog1...</em>'s output is, up to the first null character, -or to whatever <em>prog1...</em> wrote before crashing; -then execution proceeds. </li> </ul> </body> |