Revision 9258
Added by Aaron Marcuse-Kubitza almost 12 years ago
| lib/sh/util.sh | ||
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| 394 | 394 |
require_fd_not_exists() # usage: require_fd_not_exists fd || return 0 |
| 395 | 395 |
{ ! fd_exists "$1" || type=info die "fd $1 already exists, skipping"; }
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| 396 | 396 |
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| 397 |
set_fd() # usage: expr='dest[<>]src' [noclobber=1] set_fd
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| 397 |
set_fd() # usage: [noclobber=1] set_fd 'dest[<>]src'
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| 398 | 398 |
{
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| 399 |
echo_func; kw_params expr |
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| 400 |
: "${expr:?}"
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| 401 |
local dest="${expr%%[<>]*}"
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| 399 |
echo_func |
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local dest="${1%%[<>]*}"
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| 402 | 401 |
test ! "$noclobber" || require_fd_not_exists "$dest" || return 0 |
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echo_eval exec "$expr"
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| 402 |
echo_eval exec "$1"
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| 404 | 403 |
} |
| 405 | 404 |
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| 406 |
shadow_fd() { noclobber=1 set_fd; } # usage: expr='dest[<>]src' shadow_fd
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| 405 |
shadow_fd() { noclobber=1 set_fd "$@"; } # usage: shadow_fd 'dest[<>]src'
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| 407 | 406 |
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| 408 | 407 |
# convention: use fd 10/11/12 for command-specific alternate stdin/stdout/stderr |
| 409 | 408 |
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| ... | ... | |
| 413 | 412 |
{
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| 414 | 413 |
log++; echo_func; log++ |
| 415 | 414 |
# ignore errors if a source fd isn't open |
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expr='20<&0' shadow_fd || true
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| 417 |
expr='21>&1' shadow_fd || true
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expr='22>&2' shadow_fd || true
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shadow_fd '20<&0' || true
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shadow_fd '21>&1' || true
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shadow_fd '22>&2' || true
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| 419 | 418 |
} |
| 420 | 419 |
set_global_fds |
| 421 | 420 |
err_fd=22 # global stderr |
Also available in: Unified diff
lib/sh/util.sh: set_fd()/shadow_fd(): take the redirect expr as an arg instead of a kw_param because it's the only param