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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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|
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#include <errno.h> |
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#include <sys/mman.h> |
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|
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#undef _GNU_SOURCE |
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#define _GNU_SOURCE |
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#include <sched.h> |
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#include <unistd.h> |
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#include <sys/syscall.h> |
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|
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#include <sched.h> |
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|
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#include <sys/ioctl.h> |
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#include <net/if.h> |
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|
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#ifdef __has_include |
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#if !__has_include("linux/kcmp.h") // use "" as GCC wrongly expands macros |
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#undef SYS_kcmp |
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#endif |
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#endif |
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|
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#ifdef SYS_kcmp |
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#include "linux/kcmp.h" |
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#define kcmp(pid1,pid2,type,idx1,idx2) \ |
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syscall (SYS_kcmp, (pid_t)pid1, (pid_t)pid2, \ |
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(int)type, (unsigned long)idx1, (unsigned long)idx2) |
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#else |
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#define kcmp(pid1,pid2,type,idx1,idx2) \ |
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(errno = ENOSYS, -1) |
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#endif |
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|
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/* kcmp.h does not define symbols, so there is no way to detect preesence of enum */ |
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/* members, so we just hardcode new symbols here. */ |
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#ifndef KCMP_EPOLL_TFD |
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#define KCMP_EPOLL_TFD 7 |
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#endif |
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|
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/* from schmorp.h */ |
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static int |
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s_fileno (SV *fh, int wr) |
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{ |
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dTHX; |
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SvGETMAGIC (fh); |
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|
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if (SvROK (fh)) |
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{ |
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fh = SvRV (fh); |
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SvGETMAGIC (fh); |
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} |
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|
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if (SvTYPE (fh) == SVt_PVGV) |
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return PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh))); |
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|
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if (SvOK (fh) && (SvIV (fh) >= 0) && (SvIV (fh) < 0x7fffffffL)) |
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return SvIV (fh); |
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|
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return -1; |
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} |
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|
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static int |
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clone_cb (void *arg) |
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{ |
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dSP; |
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|
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PUSHMARK (SP); |
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|
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PUTBACK; |
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int count = call_sv (sv_2mortal ((SV *)arg), G_SCALAR); |
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SPAGAIN; |
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int retval = count ? SvIV (POPs) : 0; |
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PUTBACK; |
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|
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return retval; |
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} |
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|
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MODULE = Linux::Clone PACKAGE = Linux::Clone |
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|
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PROTOTYPES: ENABLE |
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|
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BOOT: |
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HV *stash = gv_stashpv ("Linux::Clone", 1); |
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|
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static const struct { |
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const char *name; |
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IV iv; |
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} *civ, const_iv[] = { |
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# define const_iv(name) { # name, (IV)name }, |
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# define const_iv_clone(name) { # name, (IV) CLONE_ ## name }, |
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# ifdef CSIGNAL |
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const_iv (CSIGNAL) |
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# endif |
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# ifdef CLONE_FILES |
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const_iv_clone (FILES) |
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# endif |
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# ifdef CLONE_FS |
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const_iv_clone (FS) |
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# endif |
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# ifdef CLONE_NEWNS |
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const_iv_clone (NEWNS) |
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# endif |
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# ifdef CLONE_VM |
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const_iv_clone (VM) |
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# endif |
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# ifdef CLONE_THREAD |
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const_iv_clone (THREAD) |
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# endif |
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# ifdef CLONE_SIGHAND |
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const_iv_clone (SIGHAND) |
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# endif |
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# ifdef CLONE_SYSVSEM |
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const_iv_clone (SYSVSEM) |
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# endif |
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# ifdef CLONE_NEWUTS |
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const_iv_clone (NEWUTS) |
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# endif |
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# ifdef CLONE_NEWIPC |
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const_iv_clone (NEWIPC) |
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# endif |
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# ifdef CLONE_NEWNET |
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const_iv_clone (NEWNET) |
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# endif |
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# ifdef CLONE_NEWTIME |
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const_iv_clone (NEWTIME) |
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# endif |
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# ifdef CLONE_PTRACE |
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const_iv_clone (PTRACE) |
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# endif |
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# ifdef CLONE_VFORK |
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const_iv_clone (VFORK) |
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# endif |
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# ifdef CLONE_SETTLS |
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const_iv_clone (SETTLS) |
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# endif |
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# ifdef CLONE_PARENT_SETTID |
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const_iv_clone (PARENT_SETTID) |
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# endif |
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# ifdef CLONE_CHILD_CLEARTID |
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const_iv_clone (CHILD_CLEARTID) |
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# endif |
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# ifdef CLONE_DETACHED |
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const_iv_clone (DETACHED) |
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# endif |
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# ifdef CLONE_UNTRACED |
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const_iv_clone (UNTRACED) |
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# endif |
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# ifdef CLONE_CHILD_SETTID |
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const_iv_clone (CHILD_SETTID) |
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# endif |
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# ifdef CLONE_NEWUSER |
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const_iv_clone (NEWUSER) |
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# endif |
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# ifdef CLONE_NEWPID |
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const_iv_clone (NEWPID) |
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# endif |
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# ifdef CLONE_IO |
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const_iv_clone (IO) |
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# endif |
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# ifdef CLONE_NEWCGROUP |
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const_iv_clone (NEWCGROUP) |
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# endif |
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# ifdef CLONE_PIDFD |
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const_iv_clone (PIDFD) |
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# endif |
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# ifdef SYS_kcmp |
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const_iv (KCMP_FILE) |
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const_iv (KCMP_VM) |
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const_iv (KCMP_FILES) |
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const_iv (KCMP_FS) |
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const_iv (KCMP_SIGHAND) |
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const_iv (KCMP_IO) |
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const_iv (KCMP_SYSVSEM) |
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const_iv (KCMP_EPOLL_TFD) |
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# endif |
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# ifdef NS_GET_USERNS |
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const_iv (NS_GET_USERNS) |
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# endif |
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# ifdef NS_GET_PARENT |
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const_iv (NS_GET_PARENT) |
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# endif |
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# ifdef NS_GET_NSTYPE |
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const_iv (NS_GET_NSTYPE) |
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# endif |
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# ifdef NS_OWNER_UID |
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const_iv (NS_OWNER_UID |
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# endif |
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}; |
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|
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for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--) |
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newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv)); |
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|
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int |
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clone (SV *sub, IV stacksize, int flags, SV *ptid = 0, SV *tls = &PL_sv_undef) |
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CODE: |
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{ |
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if (!stacksize) |
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stacksize = 4 << 20; |
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|
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pid_t ptid_; |
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char *stack_ptr = mmap (0, stacksize, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_GROWSDOWN | MAP_STACK, -1, 0); |
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|
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#ifndef __hppa |
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stack_ptr += stacksize - 16; /* be safe and put the sp at 16 bytes below the end */ |
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#endif |
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|
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RETVAL = -1; |
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if (stack_ptr != (void *)-1) |
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{ |
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SV *my_sub = newSVsv (sub); |
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|
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RETVAL = clone (clone_cb, (void *)stack_ptr, flags, (void *)my_sub, &ptid, SvOK (tls) ? SvPV_nolen (tls) : 0, 0); |
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|
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if (ptid) sv_setiv (ptid, (IV)ptid_); |
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|
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if ((flags & (CLONE_VM | CLONE_VFORK)) != CLONE_VM) |
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{ |
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int old_errno = errno; |
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munmap (stack_ptr, stacksize); |
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errno = old_errno; |
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} |
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} |
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} |
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OUTPUT: RETVAL |
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|
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int |
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unshare (int flags) |
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PROTOTYPE: @ |
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|
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int |
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setns (SV *fh_or_fd, int nstype = 0) |
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C_ARGS: s_fileno (fh_or_fd, 0), nstype |
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|
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int |
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pivot_root (SV *new_root, SV *old_root) |
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CODE: |
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RETVAL = syscall (SYS_pivot_root, |
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(const char *)SvPVbyte_nolen (new_root), |
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(const char *)SvPVbyte_nolen (old_root)); |
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OUTPUT: RETVAL |
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|
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int |
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kcmp (IV pid1, IV pid2, IV type, UV idx1 = 0, UV idx2 = 0) |
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|
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int |
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siocsifflags (char *ifname, U32 flags = IFF_UP) |
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CODE: |
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{ |
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int saved_errno; |
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struct ifreq ifr; |
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int fd = socket (AF_INET, SOCK_DGRAM, 0); |
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strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name)); |
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RETVAL = ioctl (fd, SIOCSIFFLAGS, &ifr); |
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saved_errno = errno; |
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close (fd); |
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errno = saved_errno; |
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} |
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OUTPUT: RETVAL |
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|
