Revision 9254
Added by Aaron Marcuse-Kubitza almost 12 years ago
| util.sh | ||
|---|---|---|
| 394 | 394 |
require_fd_not_exists() # usage: require_fd_not_exists fd || return 0 |
| 395 | 395 |
{ ! fd_exists "$1" || type=info die "fd $1 already exists, skipping"; }
|
| 396 | 396 |
|
| 397 |
set_fd() # usage: dest=fd dir='[<>]' src=fd [noclobber=1] set_fd
|
|
| 397 |
set_fd() # usage: dest=fd expr='[<>]&fd' [noclobber=1] set_fd
|
|
| 398 | 398 |
{
|
| 399 | 399 |
echo_func; kw_params dest dir src |
| 400 |
: "${dest:?}" "${dir:?}" "${src:?}"
|
|
| 400 |
: "${dest:?}" "${expr:?}"
|
|
| 401 | 401 |
test ! "$noclobber" || require_fd_not_exists "$dest" || return 0 |
| 402 |
echo_eval exec "$dest$dir&$src"
|
|
| 402 |
echo_eval exec "$dest$expr"
|
|
| 403 | 403 |
} |
| 404 | 404 |
|
| 405 |
shadow_fd() { noclobber=1 set_fd; } # usage: dest=fd src=fd dir='[<>]' shadow_fd
|
|
| 405 |
shadow_fd() { noclobber=1 set_fd; } # usage: dest=fd expr='[<>]&fd' shadow_fd
|
|
| 406 | 406 |
|
| 407 | 407 |
# convention: use fd 10/11/12 for command-specific alternate stdin/stdout/stderr |
| 408 | 408 |
|
| ... | ... | |
| 412 | 412 |
{
|
| 413 | 413 |
log++; echo_func; log++ |
| 414 | 414 |
# ignore errors if a source fd isn't open |
| 415 |
dest=20 src=0 dir='<' shadow_fd || true
|
|
| 416 |
dest=21 src=1 dir='>' shadow_fd || true
|
|
| 417 |
dest=22 src=2 dir='>' shadow_fd || true
|
|
| 415 |
dest=20 expr='<&0' shadow_fd || true
|
|
| 416 |
dest=21 expr='>&1' shadow_fd || true
|
|
| 417 |
dest=22 expr='>&2' shadow_fd || true
|
|
| 418 | 418 |
} |
| 419 | 419 |
set_global_fds |
| 420 | 420 |
err_fd=22 # global stderr |
Also available in: Unified diff
lib/sh/util.sh: set_fd()/shadow_fd(): take just a redirect source expr containing the <> and the fd, to allow the caller to specify these in the shell redirection syntax. this also allows using a file (such as /dev/null) as the redirect source.