crtxcr/cgitsb
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add generic filter/plugin infrastructure

Browse Source 
The functions cgit_open_filter() and cgit_close_filter() can be used to
execute filters on the output stream from cgit.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This commit is contained in:
Lars Hjemli
2009-07-31 17:38:38 +02:00
parent 286a905842
commit d6f6072560
3 changed files with 62 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
shared.c
View File

@ -355,3 +355,38 @@ int cgit_parse_snapshots_mask(const char *str)
}
return rv;
}
int cgit_open_filter(struct cgit_filter *filter)
{
filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
"Unable to duplicate STDOUT");
chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
if (filter->pid == 0) {
close(filter->pipe_fh[1]);
chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
"Unable to use pipe as STDIN");
execvp(filter->cmd, filter->argv);
die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
strerror(errno), errno);
}
close(filter->pipe_fh[0]);
chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
"Unable to use pipe as STDOUT");
close(filter->pipe_fh[1]);
return 0;
}
int cgit_close_filter(struct cgit_filter *filter)
{
chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
"Unable to restore STDOUT");
close(filter->old_stdout);
if (filter->pid < 0)
return 0;
waitpid(filter->pid, &filter->exitstatus, 0);
if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
return 0;
die("Subprocess %s exited abnormally", filter->cmd);
}