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compress .tar.gz using gzip as a filter

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This commit is contained in:
Michael Krelin 2007-07-20 20:58:23 +02:00
parent 127f43d4e2
commit 4a92cbb7fd
1 changed files with 37 additions and 1 deletions
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38
ui-snapshot.c
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@ -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,