mirror of
git://git.code.sf.net/p/zsh/code
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141 lines
3.3 KiB
C
141 lines
3.3 KiB
C
/*
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* cap.c - POSIX.1e (POSIX.6) capability set manipulation
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*
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* This file is part of zsh, the Z shell.
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*
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* Copyright (c) 1997 Andrew Main
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* All rights reserved.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and to distribute modified versions of this software for any
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* purpose, provided that the above copyright notice and the following
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* two paragraphs appear in all copies of this software.
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*
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* In no event shall Andrew Main or the Zsh Development Group be liable
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* to any party for direct, indirect, special, incidental, or consequential
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* damages arising out of the use of this software and its documentation,
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* even if Andrew Main and the Zsh Development Group have been advised of
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* the possibility of such damage.
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*
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* Andrew Main and the Zsh Development Group specifically disclaim any
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* warranties, including, but not limited to, the implied warranties of
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* merchantability and fitness for a particular purpose. The software
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* provided hereunder is on an "as is" basis, and Andrew Main and the
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* Zsh Development Group have no obligation to provide maintenance,
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* support, updates, enhancements, or modifications.
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*
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*/
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#include "cap.mdh"
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#include "cap.pro"
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#ifdef HAVE_CAP_GET_PROC
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static int
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bin_cap(char *nam, char **argv, char *ops, int func)
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{
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int ret = 0;
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cap_t caps;
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if(*argv) {
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caps = cap_from_text(*argv);
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if(!caps) {
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zwarnnam(nam, "invalid capability string", NULL, 0);
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return 1;
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}
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if(cap_set_proc(caps)) {
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zwarnnam(nam, "can't change capabilites: %e", NULL, errno);
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ret = 1;
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}
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} else {
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char *result;
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ssize_t length;
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caps = cap_get_proc();
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if(caps)
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result = cap_to_text(caps, &length);
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if(!caps || !result) {
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zwarnnam(nam, "can't get capabilites: %e", NULL, errno);
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ret = 1;
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} else
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puts(result);
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}
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cap_free(&caps);
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return ret;
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}
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static int
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bin_getcap(char *nam, char **argv, char *ops, int func)
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{
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int ret = 0;
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do {
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char *result;
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ssize_t length;
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cap_t caps = cap_get_file(*argv);
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if(caps)
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result = cap_to_text(caps, &length);
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if (!caps || !result) {
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zwarnnam(nam, "%s: %e", *argv, errno);
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ret = 1;
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} else
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printf("%s %s\n", *argv, result);
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cap_free(&caps);
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} while(*++argv);
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return ret;
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}
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static int
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bin_setcap(char *nam, char **argv, char *ops, int func)
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{
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cap_t caps;
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int ret = 0;
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caps = cap_from_text(*argv++);
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if(!caps) {
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zwarnnam(nam, "invalid capability string", NULL, 0);
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return 1;
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}
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do {
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if(cap_set_file(*argv, caps)) {
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zwarnnam(nam, "%s: %e", *argv, errno);
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ret = 1;
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}
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} while(*++argv);
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cap_free(&caps);
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return ret;
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}
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#else /* !HAVE_CAP_GET_PROC */
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# define bin_cap bin_notavail
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# define bin_getcap bin_notavail
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# define bin_setcap bin_notavail
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#endif /* !HAVE_CAP_GET_PROC */
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/* module paraphernalia */
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static struct builtin bintab[] = {
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BUILTIN("cap", 0, bin_cap, 0, 1, 0, NULL, NULL),
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BUILTIN("getcap", 0, bin_getcap, 1, -1, 0, NULL, NULL),
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BUILTIN("setcap", 0, bin_setcap, 2, -1, 0, NULL, NULL),
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};
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/**/
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int
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boot_cap(Module m)
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{
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return !addbuiltins(m->nam, bintab, sizeof(bintab)/sizeof(*bintab));
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}
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#ifdef MODULE
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/**/
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int
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cleanup_cap(Module m)
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{
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deletebuiltins(m->nam, bintab, sizeof(bintab)/sizeof(*bintab));
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return 0;
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}
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#endif
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