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#include "config.h"
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <linux/fs.h>
#ifndef FS_IOC_FSGETXATTR
#define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr)
#define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr)
struct fsxattr {
__u32 fsx_xflags; /* xflags field value (get/set) */
__u32 fsx_extsize; /* extsize field value (get/set)*/
__u32 fsx_nextents; /* nextents field value (get) */
__u32 fsx_projid; /* project identifier (get/set) */
__u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/
unsigned char fsx_pad[8];
};
#endif
#ifndef BCHFS_IOC_REINHERIT_ATTRS
#define BCHFS_IOC_REINHERIT_ATTRS _IOR(0xbc, 64, const char *)
#endif
#include "pot.h"
#include "common.h"
#define min(x,y) (((x) < (y)) ? (x) : (y))
#define max(x,y) (((x) > (y)) ? (x) : (y))
char *progname;
static bool __project_name_to_id(FILE *f, const char *name, unsigned *id)
{
char *line = NULL;
size_t n = 0;
*id = 0;
while (getline(&line, &n, f) >= 0) {
char *p = line;
char *projname_str = strsep(&p, ":");
char *projid_str = strsep(&p, "\n");
if (!projid_str || !projname_str)
continue;
errno = 0;
unsigned projid = strtoul(projid_str, NULL, 0);
if (errno)
continue;
*id = max(*id, projid);
if (!strcmp(projname_str, name)) {
free(line);
*id = projid;
return true;
}
}
free(line);
return false;
}
static unsigned project_name_to_id(const char *name, bool create)
{
FILE *f = fopen("/etc/projid", "a+");
unsigned id;
if (!f)
die(1, _("error opening projid file\n"));
if (__project_name_to_id(f, name, &id))
goto success;
if (!create)
die(1, _("project %s does not exist\n"), name);
fprintf(f, "%s:%u\n", name, ++id);
fclose(f);
success:
return id;
}
static void do_setproject(int fd, unsigned id)
{
struct fsxattr fa;
if (ioctl(fd, FS_IOC_FSGETXATTR, &fa))
die(1, _("FS_IOC_FSGETXATTR error\n"));
fa.fsx_projid = id;
if (ioctl(fd, FS_IOC_FSSETXATTR, &fa))
die(1, _("FS_IOC_FSSETXATTR error\n"));
}
static void setproject_recurse(int dirfd, unsigned id, unsigned dev)
{
DIR *dir = fdopendir(dirfd);
struct dirent *d;
while ((errno = 0), (d = readdir(dir))) {
if (!strcmp(d->d_name, ".") ||
!strcmp(d->d_name, ".."))
continue;
struct stat st;
if (fstatat(dirfd, d->d_name, &st, AT_SYMLINK_NOFOLLOW)) {
errstr(_("error statting %s: %m"), d->d_name);
errno = 0;
continue;
}
if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
continue;
int fd = openat(dirfd, d->d_name, AT_SYMLINK_NOFOLLOW);
if (fd < 0) {
errstr(_("error opening %s: %m"), d->d_name);
errno = 0;
continue;
}
if (st.st_dev != dev ||
ioctl(dirfd, BCHFS_IOC_REINHERIT_ATTRS, d->d_name) < 0)
do_setproject(fd, id);
if (S_ISDIR(st.st_mode))
setproject_recurse(fd, id, st.st_dev);
close(fd);
}
}
static void setproject(const char *path, unsigned id)
{
int fd = open(path, O_RDONLY|O_NOATIME);
if (fd < 0) {
errstr(_("error opening %s: %m"), path);
return;
}
struct stat st;
if (fstat(fd, &st)) {
errstr(_("error statting %s: %m"), path);
return;
}
if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
return;
do_setproject(fd, id);
if (S_ISDIR(st.st_mode))
setproject_recurse(fd, id, st.st_dev);
close(fd);
}
static void usage(void)
{
errstr( "%s%s",
_("Usage: setproject [ -c ] -P project files...\n"),
_("\n\
-P, --project project name\n\
-c, --create create project if it does not exist\n\
-h, --help display this help message and exit\n\
-V, --version display version information and exit\n\n"));
fprintf(stderr, _("Bugs to: %s\n"), PACKAGE_BUGREPORT);
exit(1);
}
int main(int argc, char *argv[])
{
struct option long_opts[] = {
{ "project", 1, NULL, 'P' },
{ "create", 0, NULL, 'c' },
{ "help", 0, NULL, 'h' },
{ "version", 0, NULL, 'V' },
{ NULL, 0, NULL, 0 }
};
const char *project_name = NULL;
bool create = false;
int ret;
gettexton();
progname = basename(argv[0]);
while ((ret = getopt_long(argc, argv, "P:c", long_opts, NULL)) != -1) {
switch (ret) {
case 'P':
project_name = optarg;
break;
case 'c':
create = true;
break;
case 'h':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (!project_name)
die(1, _("No project specified.\n"));
unsigned i, project_id = project_name_to_id(project_name, create);
for (i = 0; i < argc; i++)
setproject(argv[i], project_id);
return 0;
}
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