890b510669374350f288d5e58c42a0f4102adea4
1 /* pkg_alternatives.c - the opkg package management system
3 Copyright (C) 2017 Yousong Zhou
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as
7 published by the Free Software Foundation; either version 2, or (at
8 your option) any later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
17 #include <sys/types.h> /* stat */
21 #include "libbb/libbb.h"
22 #include "opkg_message.h"
25 #include "pkg_alternatives.h"
26 #include "sprintf_alloc.h"
28 static int pkg_alternatives_update_path(pkg_t
*pkg
, const pkg_vec_t
*installed
, const char *path
)
30 struct pkg_alternatives
*pkg_alts
;
31 struct pkg_alternative
*the_alt
= NULL
;
37 for (i
= 0; i
< installed
->len
; i
++) {
38 pkg_t
*pkg
= installed
->pkgs
[i
];
39 pkg_alts
= pkg_get_ptr(pkg
, PKG_ALTERNATIVES
);
43 for (j
= 0; j
< pkg_alts
->nalts
; j
++) {
44 struct pkg_alternative
*alt
= pkg_alts
->alts
[j
];
46 if (strcmp(path
, alt
->path
))
48 if (!the_alt
|| the_alt
->prio
< alt
->prio
) {
55 /* path is assumed to be an absolute one */
56 sprintf_alloc(&path_in_dest
, "%s%s", the_pkg
->dest
->root_dir
, &path
[1]);
63 r
= lstat(path_in_dest
, &sb
);
67 if (!S_ISLNK(sb
.st_mode
)) {
68 opkg_msg(ERROR
, "%s exists but is not a symlink\n", path_in_dest
);
72 realpath
= xreadlink(path_in_dest
);
73 if (realpath
&& strcmp(realpath
, the_alt
->altpath
))
76 } else if (errno
!= ENOENT
) {
79 r
= symlink(the_alt
->altpath
, path_in_dest
);
81 opkg_msg(ERROR
, "failed symlinking %s -> %s\n", path_in_dest
, the_alt
->altpath
);
92 int pkg_alternatives_update(pkg_t
* pkg
)
96 struct pkg_alternatives
*pkg_alts
;
97 struct pkg_alternative
*alt
= NULL
;
100 pkg_alts
= pkg_get_ptr(pkg
, PKG_ALTERNATIVES
);
104 installed
= pkg_vec_alloc();
105 pkg_hash_fetch_all_installed(installed
);
106 for (i
= 0; i
< pkg_alts
->nalts
; i
++) {
107 alt
= pkg_alts
->alts
[i
];
108 r
|= pkg_alternatives_update_path(pkg
, installed
, alt
->path
);
110 pkg_vec_free(installed
);