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Comparing Linux-Clone/Clone.xs (file contents):
Revision 1.2 by root, Wed Aug 24 03:34:24 2016 UTC vs.
Revision 1.6 by root, Sat Sep 3 23:47:02 2022 UTC

… …
6#include <sys/mman.h> 6#include <sys/mman.h>
7 7
8#undef _GNU_SOURCE 8#undef _GNU_SOURCE
9#define _GNU_SOURCE 9#define _GNU_SOURCE
10#include <sched.h> 10#include <sched.h>
11#include <unistd.h>
12#include <sys/syscall.h>
13
14#include <sched.h>
15
16#include <sys/ioctl.h>
17#include <net/if.h>
18
19#ifdef __has_include
20 #if !__has_include("linux/kcmp.h") // use "" as GCC wrongly expands macros
21 #undef SYS_kcmp
22 #endif
23#endif
24
25#ifdef SYS_kcmp
26 #include "linux/kcmp.h"
27 #define kcmp(pid1,pid2,type,idx1,idx2) \
28 syscall (SYS_kcmp, (pid_t)pid1, (pid_t)pid2, \
29 (int)type, (unsigned long)idx1, (unsigned long)idx2)
30#else
31 #define kcmp(pid1,pid2,type,idx1,idx2) \
32 (errno = ENOSYS, -1)
33#endif
11 34
12/* from schmorp.h */ 35/* from schmorp.h */
13static int 36static int
14s_fileno (SV *fh, int wr) 37s_fileno (SV *fh, int wr)
15{ 38{
… …
56 79
57 static const struct { 80 static const struct {
58 const char *name; 81 const char *name;
59 IV iv; 82 IV iv;
60 } *civ, const_iv[] = { 83 } *civ, const_iv[] = {
84# define const_iv(name) { # name, (IV)name },
61# define const_iv(name) { # name, (IV) CLONE_ ## name }, 85# define const_iv_clone(name) { # name, (IV) CLONE_ ## name },
86# ifdef CSIGNAL
87 const_iv (CSIGNAL)
88# endif
62# ifdef CLONE_FILES 89# ifdef CLONE_FILES
63 const_iv (FILES) 90 const_iv_clone (FILES)
64# endif 91# endif
65# ifdef CLONE_FS 92# ifdef CLONE_FS
66 const_iv (FS) 93 const_iv_clone (FS)
67# endif 94# endif
68# ifdef CLONE_NEWNS 95# ifdef CLONE_NEWNS
69 const_iv (NEWNS) 96 const_iv_clone (NEWNS)
70# endif 97# endif
71# ifdef CLONE_VM 98# ifdef CLONE_VM
72 const_iv (VM) 99 const_iv_clone (VM)
73# endif 100# endif
74# ifdef CLONE_THREAD 101# ifdef CLONE_THREAD
75 const_iv (THREAD) 102 const_iv_clone (THREAD)
76# endif 103# endif
77# ifdef CLONE_SIGHAND 104# ifdef CLONE_SIGHAND
78 const_iv (SIGHAND) 105 const_iv_clone (SIGHAND)
79# endif 106# endif
80# ifdef CLONE_SYSVSEM 107# ifdef CLONE_SYSVSEM
81 const_iv (SYSVSEM) 108 const_iv_clone (SYSVSEM)
82# endif 109# endif
83# ifdef CLONE_NEWUTS 110# ifdef CLONE_NEWUTS
84 const_iv (NEWUTS) 111 const_iv_clone (NEWUTS)
85# endif 112# endif
86# ifdef CLONE_NEWIPC 113# ifdef CLONE_NEWIPC
87 const_iv (NEWIPC) 114 const_iv_clone (NEWIPC)
88# endif 115# endif
89# ifdef CLONE_NEWNET 116# ifdef CLONE_NEWNET
90 const_iv (NEWNET) 117 const_iv_clone (NEWNET)
91# endif 118# endif
92# ifdef CLONE_PTRACE 119# ifdef CLONE_PTRACE
93 const_iv (PTRACE) 120 const_iv_clone (PTRACE)
94# endif 121# endif
95# ifdef CLONE_VFORK 122# ifdef CLONE_VFORK
96 const_iv (VFORK) 123 const_iv_clone (VFORK)
97# endif 124# endif
98# ifdef CLONE_SETTLS 125# ifdef CLONE_SETTLS
99 const_iv (SETTLS) 126 const_iv_clone (SETTLS)
100# endif 127# endif
101# ifdef CLONE_PARENT_SETTID 128# ifdef CLONE_PARENT_SETTID
102 const_iv (PARENT_SETTID) 129 const_iv_clone (PARENT_SETTID)
103# endif 130# endif
104# ifdef CLONE_CHILD_CLEARTID 131# ifdef CLONE_CHILD_CLEARTID
105 const_iv (CHILD_CLEARTID) 132 const_iv_clone (CHILD_CLEARTID)
106# endif 133# endif
107# ifdef CLONE_DETACHED 134# ifdef CLONE_DETACHED
108 const_iv (DETACHED) 135 const_iv_clone (DETACHED)
109# endif 136# endif
110# ifdef CLONE_UNTRACED 137# ifdef CLONE_UNTRACED
111 const_iv (UNTRACED) 138 const_iv_clone (UNTRACED)
112# endif 139# endif
113# ifdef CLONE_CHILD_SETTID 140# ifdef CLONE_CHILD_SETTID
114 const_iv (CHILD_SETTID) 141 const_iv_clone (CHILD_SETTID)
115# endif 142# endif
116# ifdef CLONE_NEWUSER 143# ifdef CLONE_NEWUSER
117 const_iv (NEWUSER) 144 const_iv_clone (NEWUSER)
118# endif 145# endif
119# ifdef CLONE_NEWPID 146# ifdef CLONE_NEWPID
120 const_iv (NEWPID) 147 const_iv_clone (NEWPID)
121# endif 148# endif
122# ifdef CLONE_IO 149# ifdef CLONE_IO
123 const_iv (IO) 150 const_iv_clone (IO)
124# endif 151# endif
125# ifdef CLONE_NEWCGROUP 152# ifdef CLONE_NEWCGROUP
126 const_iv (NEWCGROUP) 153 const_iv_clone (NEWCGROUP)
154# endif
155# ifdef CLONE_PIDFD
156 const_iv_clone (PIDFD)
157# endif
158# ifdef SYS_kcmp
159 const_iv (KCMP_FILE)
160 const_iv (KCMP_VM)
161 const_iv (KCMP_FILES)
162 const_iv (KCMP_FS)
163 const_iv (KCMP_SIGHAND)
164 const_iv (KCMP_IO)
165 const_iv (KCMP_SYSVSEM)
166 const_iv (KCMP_FILE)
127# endif 167# endif
128 }; 168 };
129 169
130 for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--) 170 for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
131 newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv)); 171 newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
… …
159 munmap (stack_ptr, stacksize); 199 munmap (stack_ptr, stacksize);
160 errno = old_errno; 200 errno = old_errno;
161 } 201 }
162 } 202 }
163} 203}
164 OUTPUT: 204 OUTPUT: RETVAL
165 RETVAL
166 205
167int 206int
168unshare (int flags) 207unshare (int flags)
169 208
170int 209int
171setns (SV *fh_or_fd, int nstype = 0) 210setns (SV *fh_or_fd, int nstype = 0)
172 C_ARGS: s_fileno (fh_or_fd, 0), nstype 211 C_ARGS: s_fileno (fh_or_fd, 0), nstype
212
213int
214pivot_root (SV *new_root, SV *old_root)
215 CODE:
216 RETVAL = syscall (SYS_pivot_root,
217 (const char *)SvPVbyte_nolen (new_root),
218 (const char *)SvPVbyte_nolen (old_root));
219 OUTPUT: RETVAL
220
221int
222kcmp (IV pid1, IV pid2, IV type, UV idx1 = 0, UV idx2 = 0)
223
224int
225siocsifflags (char *ifname, U32 flags = IFF_UP)
226 CODE:
227{
228 int saved_errno;
229 struct ifreq ifr;
230 int fd = socket (AF_INET, SOCK_DGRAM, 0);
231 strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
232 RETVAL = ioctl (fd, SIOCSIFFLAGS, &ifr);
233 saved_errno = errno;
234 close (fd);
235 errno = saved_errno;
236}
237 OUTPUT: RETVAL
238

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