Revision 9257
Added by Aaron Marcuse-Kubitza about 11 years ago
| 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 $1 already exists, skipping"; }
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| 396 | 396 |
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| 397 |
set_fd() # usage: dest=fd expr='[<>]src' [noclobber=1] set_fd
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set_fd() # usage: expr='dest[<>]src' [noclobber=1] set_fd
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| 398 | 398 |
{
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echo_func; kw_params dest expr |
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: "${dest:?}" "${expr:?}"
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echo_func; kw_params expr |
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: "${expr:?}"
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local dest="${expr%%[<>]*}"
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| 401 | 402 |
test ! "$noclobber" || require_fd_not_exists "$dest" || return 0 |
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echo_eval exec "$dest$expr"
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echo_eval exec "$expr" |
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| 403 | 404 |
} |
| 404 | 405 |
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shadow_fd() { noclobber=1 set_fd; } # usage: dest=fd expr='[<>]src' shadow_fd
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shadow_fd() { noclobber=1 set_fd; } # usage: expr='dest[<>]src' shadow_fd
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| 406 | 407 |
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| 407 | 408 |
# convention: use fd 10/11/12 for command-specific alternate stdin/stdout/stderr |
| 408 | 409 |
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| ... | ... | |
| 412 | 413 |
{
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| 413 | 414 |
log++; echo_func; log++ |
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# ignore errors if a source fd isn't open |
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dest=20 expr='<&0' shadow_fd || true
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dest=21 expr='>&1' shadow_fd || true
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dest=22 expr='>&2' shadow_fd || true
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expr='20<&0' shadow_fd || true
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expr='21>&1' shadow_fd || true
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expr='22>&2' shadow_fd || true
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| 418 | 419 |
} |
| 419 | 420 |
set_global_fds |
| 420 | 421 |
err_fd=22 # global stderr |
Also available in: Unified diff
lib/sh/util.sh: set_fd()/shadow_fd(): take just a redirect expr containing the entire dest[<>]src expr, and parse the dest out from it