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diff --git a/shared.c b/shared.c index cce0af4..288cfa2 100644 --- a/ shared.c+++ b/ shared.c |
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@@ -356,2 +356,37 @@ int cgit_parse_snapshots_mask(const char *str) |
356 | return rv; |
356 | return rv; |
357 | } |
357 | } |
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358 | |
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359 | int cgit_open_filter(struct cgit_filter *filter) |
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360 | { |
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361 | |
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362 | filter->old_stdout = chk_positive(dup(STDOUT_FILENO), |
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363 | "Unable to duplicate STDOUT"); |
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364 | chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess"); |
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365 | filter->pid = chk_non_negative(fork(), "Unable to create subprocess"); |
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366 | if (filter->pid == 0) { |
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367 | close(filter->pipe_fh[1]); |
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368 | chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO), |
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369 | "Unable to use pipe as STDIN"); |
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370 | execvp(filter->cmd, filter->argv); |
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371 | die("Unable to exec subprocess %s: %s (%d)", filter->cmd, |
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372 | strerror(errno), errno); |
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373 | } |
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374 | close(filter->pipe_fh[0]); |
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375 | chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO), |
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376 | "Unable to use pipe as STDOUT"); |
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377 | close(filter->pipe_fh[1]); |
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378 | return 0; |
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379 | } |
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380 | |
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381 | int cgit_close_filter(struct cgit_filter *filter) |
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382 | { |
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383 | chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO), |
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384 | "Unable to restore STDOUT"); |
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385 | close(filter->old_stdout); |
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386 | if (filter->pid < 0) |
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387 | return 0; |
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388 | waitpid(filter->pid, &filter->exitstatus, 0); |
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389 | if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus)) |
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390 | return 0; |
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391 | die("Subprocess %s exited abnormally", filter->cmd); |
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392 | } |
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