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| author | Michael Krelin <hacker@klever.net> | |
|---|---|---|
| committer | Michael Krelin <hacker@klever.net> | |
| commit | ||
| parent | ||
| tree | ||
| download | ||
compress .tar.gz using gzip as a filter
Diffstat (limited to '')
| -rw-r--r-- | ui-snapshot.c | 38 |
1 file changed, 37 insertions, 1 deletion
diff --git a/ui-snapshot.c b/ui-snapshot.c index eb5f1cd..649569f 100644 --- a/ui-snapshot.c +++ b/ui-snapshot.c @@ -8,13 +8,49 @@ #include "cgit.h" +static int write_tar_gzip_archive(struct archiver_args *args) +{ + int rw[2]; + pid_t gzpid; + int stdout2; + int status; + int rv; + + stdout2 = chk_non_negative(dup(STDIN_FILENO), "Preserving STDOUT before compressing"); + chk_zero(pipe(rw), "Opening pipe from compressor subprocess"); + gzpid = chk_non_negative(fork(), "Forking compressor subprocess"); + if(gzpid==0) { + /* child */ + chk_zero(close(rw[1]), "Closing write end of pipe in child"); + chk_zero(close(STDIN_FILENO), "Closing STDIN"); + chk_non_negative(dup2(rw[0],STDIN_FILENO), "Redirecting compressor input to stdin"); + execlp("gzip","gzip",NULL); + _exit(-1); + } + /* parent */ + chk_zero(close(rw[0]), "Closing read end of pipe"); + chk_non_negative(dup2(rw[1],STDOUT_FILENO), "Redirecting output to compressor"); + + rv = write_tar_archive(args); + + chk_zero(close(STDOUT_FILENO), "Closing STDOUT redirected to compressor"); + chk_non_negative(dup2(stdout2,STDOUT_FILENO), "Restoring uncompressed STDOUT"); + chk_zero(close(stdout2), "Closing uncompressed STDOUT"); + chk_zero(close(rw[1]), "Closing write end of pipe in parent"); + chk_positive(waitpid(gzpid,&status,0), "Waiting on compressor process"); + if(! ( WIFEXITED(status) && WEXITSTATUS(status)==0 ) ) + cgit_print_error("Failed to compress archive"); + + return rv; +} + static const struct snapshot_archive_t { const char *suffix; const char *mimetype; write_archive_fn_t write_func; } snapshot_archives[] = { { ".zip", "application/x-zip", write_zip_archive }, - { ".tar.gz", "application/x-gzip", write_tar_archive } + { ".tar.gz", "application/x-gzip", write_tar_gzip_archive } }; void cgit_print_snapshot(struct cacheitem *item, const char *hex, |