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>

diff --git a/ui-snapshot.c b/ui-snapshot.c
index 5372f5d3d8b42a474713fe0867f4b50d96f5acf1..4136b3eb8d05001b614b4f3ce3423dd897d4db0e 100644 (file)
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -12,37 +12,16 @@
 
 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;
 }