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authorMichael Krelin <hacker@klever.net>2007-07-20 20:58:23 +0200
committerMichael Krelin <hacker@klever.net>2007-07-20 20:58:23 +0200
commit4a92cbb7fd1084764dfe9b97a163f1084c790b15 (patch)
tree827b18f334c6de56d7e9495b3cf0cb0da1392d31 /ui-snapshot.c
parent127f43d4e202ba3e63f72add44238c2686dd97f3 (diff)
compress .tar.gz using gzip as a filter
Diffstat (limited to 'ui-snapshot.c')
-rw-r--r--ui-snapshot.c38
1 files changed, 37 insertions, 1 deletions
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,