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libxbps: sane umask for pkgdb and files plists

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This commit is contained in:
Duncaen 2017-02-27 18:02:39 +01:00
parent 4999f3f2fc
commit cd4c07a467
1 changed files with 13 additions and 12 deletions
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25
lib/pkgdb.c
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@ -63,23 +63,25 @@ int
xbps_pkgdb_lock(struct xbps_handle *xhp)
{
mode_t prev_umask;
int rv;
int rv = 0;
/*
* Use a mandatory file lock to only allow one writer to pkgdb,
* other writers will block.
*/
prev_umask = umask(022);
xhp->pkgdb_plist = xbps_xasprintf("%s/%s", xhp->metadir, XBPS_PKGDB);
if (xbps_pkgdb_init(xhp) == ENOENT) {
/* if metadir does not exist, create it */
if (access(xhp->metadir, R_OK|X_OK) == -1) {
if (errno != ENOENT)
return errno;
if (errno != ENOENT) {
rv = errno;
goto ret;
}
if (xbps_mkpath(xhp->metadir, 0755) == -1) {
rv = errno;
xbps_dbg_printf(xhp, "[pkgdb] failed to create metadir "
"%s: %s\n", xhp->metadir, strerror(rv));
return rv;
goto ret;
}
}
/* if pkgdb is unexistent, create it with an empty dictionary */
@ -88,27 +90,26 @@ xbps_pkgdb_lock(struct xbps_handle *xhp)
rv = errno;
xbps_dbg_printf(xhp, "[pkgdb] failed to create pkgdb "
"%s: %s\n", xhp->pkgdb_plist, strerror(rv));
return rv;
goto ret;
}
}
prev_umask = umask(022);
if ((pkgdb_fd = open(xhp->pkgdb_plist, O_CREAT|O_RDWR|O_CLOEXEC, 0664)) == -1) {
rv = errno;
xbps_dbg_printf(xhp, "[pkgdb] cannot open pkgdb for locking "
"%s: %s\n", xhp->pkgdb_plist, strerror(rv));
free(xhp->pkgdb_plist);
umask(prev_umask);
return rv;
goto ret;
}
umask(prev_umask);
if (lockf(pkgdb_fd, F_TLOCK, 0) == -1) {
rv = errno;
xbps_dbg_printf(xhp, "[pkgdb] cannot lock pkgdb: %s\n", strerror(rv));
return rv;
}
return 0;
ret:
umask(prev_umask);
return rv;
}
void