ui-snapshot: use cgit_{open|close}_filter() to execute compressors

This simplifies the code in ui-snapshot.c and makes the test-suite
verify the new filter-functions.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 7 insertions, 28 deletions

diff --git a/ui-snapshot.c b/ui-snapshot.c
index 5372f5d..4136b3e 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -1,77 +1,56 @@
 /* ui-snapshot.c: generate snapshot of a commit
  *
  * Copyright (C) 2006 Lars Hjemli
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  */
 
 #include "cgit.h"
 #include "html.h"
 #include "ui-shared.h"
 
 static int write_compressed_tar_archive(struct archiver_args *args,const char *filter)
 {
-	int rw[2];
-	pid_t gzpid;
-	int stdout2;
-	int status;
 	int rv;
+	struct cgit_filter f;
 
-	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(filter,filter,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");
-
+	f.cmd = xstrdup(filter);
+	f.argv = malloc(2 * sizeof(char *));
+	f.argv[0] = f.cmd;
+	f.argv[1] = NULL;
+	cgit_open_filter(&f);
 	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");
-
+	cgit_close_filter(&f);
 	return rv;
 }
 
 static int write_tar_gzip_archive(struct archiver_args *args)
 {
 	return write_compressed_tar_archive(args,"gzip");
 }
 
 static int write_tar_bzip2_archive(struct archiver_args *args)
 {
 	return write_compressed_tar_archive(args,"bzip2");
 }
 
 const struct cgit_snapshot_format cgit_snapshot_formats[] = {
 	{ ".zip", "application/x-zip", write_zip_archive, 0x1 },
 	{ ".tar.gz", "application/x-gzip", write_tar_gzip_archive, 0x2 },
 	{ ".tar.bz2", "application/x-bzip2", write_tar_bzip2_archive, 0x4 },
 	{ ".tar", "application/x-tar", write_tar_archive, 0x8 },
 	{}
 };
 
 static const struct cgit_snapshot_format *get_format(const char *filename)
 {
 	const struct cgit_snapshot_format *fmt;
 	int fl, sl;
 
 	fl = strlen(filename);
 	for(fmt = cgit_snapshot_formats; fmt->suffix; fmt++) {
 		sl = strlen(fmt->suffix);
 		if (sl >= fl)
 			continue;
 		if (!strcmp(fmt->suffix, filename + fl - sl))