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Fix tool_utils.c build when HAVE_SETNS is unset

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Add inline setns() function to tool_utils.h. Without it
tool_utils.c can't be build when HAVE_SETNS is unset.

Signed-off-by: Serj Kalichev <serj.kalichev@gmail.com>
This commit is contained in:
Serj Kalichev 2018-04-26 16:20:30 +03:00
parent fca96eb6da
commit 09e6e41e05
1 changed files with 33 additions and 0 deletions
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33
src/lxc/tools/tool_utils.h
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@ -23,6 +23,8 @@
/* Properly support loop devices on 32bit systems. */
#define _FILE_OFFSET_BITS 64
#include "config.h"
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
@ -109,6 +111,37 @@ extern signed long lxc_config_parse_arch(const char *arch);
extern int lxc_namespace_2_cloneflag(const char *namespace);
extern int lxc_fill_namespace_flags(char *flaglist, int *flags);
#if !defined(__NR_setns) && !defined(__NR_set_ns)
#if defined(__x86_64__)
#define __NR_setns 308
#elif defined(__i386__)
#define __NR_setns 346
#elif defined(__arm__)
#define __NR_setns 375
#elif defined(__aarch64__)
#define __NR_setns 375
#elif defined(__powerpc__)
#define __NR_setns 350
#elif defined(__s390__)
#define __NR_setns 339
#endif
#endif
/* Define setns() if missing from the C library */
#ifndef HAVE_SETNS
static inline int setns(int fd, int nstype)
{
#ifdef __NR_setns
return syscall(__NR_setns, fd, nstype);
#elif defined(__NR_set_ns)
return syscall(__NR_set_ns, fd, nstype);
#else
errno = ENOSYS;
return -1;
#endif
}
#endif
#if HAVE_LIBCAP
#include <sys/capability.h>