Diffstat (limited to 'shared.c')
| -rw-r--r-- | shared.c | 35 |
1 files changed, 35 insertions, 0 deletions
@@ -457,6 +457,41 @@ void cgit_prepare_repo_env(struct cgit_repo * repo) fprintf(stderr, warn, p->name, p->value); } +int cgit_open_filter(struct cgit_filter *filter) +{ + filter->old_stdout = chk_positive(dup(STDOUT_FILENO), + "Unable to duplicate STDOUT"); + chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess"); + filter->pid = chk_non_negative(fork(), "Unable to create subprocess"); + if (filter->pid == 0) { + close(filter->pipe_fh[1]); + chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO), + "Unable to use pipe as STDIN"); + execvp(filter->cmd, filter->argv); + die_errno("Unable to exec subprocess %s", filter->cmd); + } + close(filter->pipe_fh[0]); + chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO), + "Unable to use pipe as STDOUT"); + close(filter->pipe_fh[1]); + return 0; +} + +int cgit_close_filter(struct cgit_filter *filter) +{ + int exit_status; + + chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO), + "Unable to restore STDOUT"); + close(filter->old_stdout); + if (filter->pid < 0) + return 0; + waitpid(filter->pid, &exit_status, 0); + if (WIFEXITED(exit_status) && !WEXITSTATUS(exit_status)) + return 0; + die("Subprocess %s exited abnormally", filter->cmd); +} + /* Read the content of the specified file into a newly allocated buffer, * zeroterminate the buffer and return 0 on success, errno otherwise. */ |