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

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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>
This commit is contained in:
Lars Hjemli 2009-07-31 15:52:57 +02:00
parent d6f6072560
commit 18dfbdc099
1 changed files with 7 additions and 28 deletions
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35
ui-snapshot.c
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@ -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;
}