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/*
* Copyright 2011-2019 Gentoo Foundation
* Distributed under the terms of the GNU General Public License v2
*
* Copyright 2011-2016 Mike Frysinger - <vapier@gentoo.org>
* Copyright 2018- Fabian Groffen - <grobian@gentoo.org>
*/
#include "main.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "rmspace.h"
#include "profile.h"
static void *
q_profile_walk_at(int dir_fd, const char *dir, const char *file,
q_profile_callback_t callback, void *data)
{
FILE *fp;
int subdir_fd, fd;
int linelen;
size_t buflen;
char *buf;
/* Pop open this profile dir */
subdir_fd = openat(dir_fd, dir, O_RDONLY|O_CLOEXEC|O_PATH);
if (subdir_fd < 0)
return data;
/* Then open the file */
fd = openat(subdir_fd, file, O_RDONLY|O_CLOEXEC);
if (fd < 0)
goto walk_parent;
fp = fdopen(fd, "r");
if (!fp) {
close(fd);
goto walk_parent;
}
/* hand feed the file to the callback */
buf = NULL;
while (getline(&buf, &buflen, fp) != -1)
data = callback(data, buf);
free(buf);
/* does close(fd) for us */
fclose(fp);
/* Now walk the parents */
walk_parent:
fd = openat(subdir_fd, "parent", O_RDONLY|O_CLOEXEC);
if (fd < 0)
goto done;
fp = fdopen(fd, "r");
if (!fp) {
close(fd);
goto done;
}
buf = NULL;
while ((linelen = getline(&buf, &buflen, fp)) >= 0) {
char *s;
rmspace_len(buf, (size_t)linelen);
s = strchr(buf, '#');
if (s)
*s = '\0';
data = q_profile_walk_at(subdir_fd, buf, file, callback, data);
}
free(buf);
/* does close(fd) for us */
fclose(fp);
done:
if (subdir_fd != AT_FDCWD)
close(subdir_fd);
return data;
}
void *
q_profile_walk(const char *file, q_profile_callback_t callback, void *data)
{
/* Walk the profiles and read the file in question */
data = q_profile_walk_at(AT_FDCWD, CONFIG_EPREFIX "etc/make.profile", file, callback, data);
return q_profile_walk_at(AT_FDCWD, CONFIG_EPREFIX "etc/portage/make.profile", file, callback, data);
}
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