792 lines
19 KiB
C
792 lines
19 KiB
C
/* $NetBSD: linux_oldselect.c,v 1.4 1995/03/22 05:24:47 mycroft Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1995 Frank van der Linden
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed for the NetBSD Project
|
|
* by Frank van der Linden
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Linux compatibility module. Try to deal with various Linux system calls.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/dir.h>
|
|
#include <sys/file.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/ptrace.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/signal.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/time.h>
|
|
#include <sys/times.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/utsname.h>
|
|
#include <sys/unistd.h>
|
|
|
|
#include <sys/syscallargs.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_param.h>
|
|
|
|
#include <compat/linux/linux_types.h>
|
|
#include <compat/linux/linux_fcntl.h>
|
|
#include <compat/linux/linux_mmap.h>
|
|
#include <compat/linux/linux_syscallargs.h>
|
|
#include <compat/linux/linux_util.h>
|
|
#include <compat/linux/linux_dirent.h>
|
|
|
|
/*
|
|
* The information on a terminated (or stopped) process needs
|
|
* to be converted in order for Linux binaries to get a valid signal
|
|
* number out of it.
|
|
*/
|
|
static int
|
|
bsd_to_linux_wstat(status)
|
|
int *status;
|
|
{
|
|
if (WIFSIGNALED(*status))
|
|
*status = (*status & ~0177) |
|
|
bsd_to_linux_sig(WTERMSIG(*status));
|
|
else if (WIFSTOPPED(*status))
|
|
*status = (*status & ~0xff00) |
|
|
(bsd_to_linux_sig(WSTOPSIG(*status)) << 8);
|
|
}
|
|
|
|
/*
|
|
* waitpid(2). Passed on to the NetBSD call, surrounded by code to
|
|
* reserve some space for a NetBSD-style wait status, and converting
|
|
* it to what Linux wants.
|
|
*/
|
|
int
|
|
linux_waitpid(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_waitpid_args /* {
|
|
syscallarg(int) pid;
|
|
syscallarg(int *) status;
|
|
syscallarg(int) options;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct wait4_args w4a;
|
|
int error, *status, tstat;
|
|
caddr_t sg;
|
|
|
|
sg = stackgap_init();
|
|
status = (int *) stackgap_alloc(&sg, sizeof status);
|
|
|
|
SCARG(&w4a, pid) = SCARG(uap, pid);
|
|
SCARG(&w4a, status) = status;
|
|
SCARG(&w4a, options) = SCARG(uap, options);
|
|
SCARG(&w4a, rusage) = NULL;
|
|
|
|
if ((error = wait4(p, &w4a, retval)))
|
|
return error;
|
|
|
|
if ((error = copyin(status, &tstat, sizeof tstat)))
|
|
return error;
|
|
|
|
bsd_to_linux_wstat(&tstat);
|
|
|
|
return copyout(&tstat, SCARG(uap, status), sizeof tstat);
|
|
}
|
|
|
|
/*
|
|
* This is very much the same as waitpid()
|
|
*/
|
|
int
|
|
linux_wait4(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_wait4_args /* {
|
|
syscallarg(int) pid;
|
|
syscallarg(int *) status;
|
|
syscallarg(int) options;
|
|
syscallarg(struct rusage *) rusage;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct wait4_args w4a;
|
|
int error, *status, tstat;
|
|
caddr_t sg;
|
|
|
|
sg = stackgap_init();
|
|
status = (int *) stackgap_alloc(&sg, sizeof status);
|
|
|
|
SCARG(&w4a, pid) = SCARG(uap, pid);
|
|
SCARG(&w4a, status) = status;
|
|
SCARG(&w4a, options) = SCARG(uap, options);
|
|
SCARG(&w4a, rusage) = SCARG(uap, rusage);
|
|
|
|
if ((error = wait4(p, &w4a, retval)))
|
|
return error;
|
|
|
|
if ((error = copyin(status, &tstat, sizeof tstat)))
|
|
return error;
|
|
|
|
bsd_to_linux_wstat(&tstat);
|
|
|
|
return copyout(&tstat, SCARG(uap, status), sizeof tstat);
|
|
}
|
|
|
|
/*
|
|
* This is the old brk(2) call. I don't think anything in the Linux
|
|
* world uses this anymore
|
|
*/
|
|
int
|
|
linux_break(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_brk_args /* {
|
|
syscallarg(char *) nsize;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
return ENOSYS;
|
|
}
|
|
|
|
/*
|
|
* Linux brk(2). The check if the new address is >= the old one is
|
|
* done in the kernel in Linux. NetBSD does it in the library.
|
|
*/
|
|
int
|
|
linux_brk(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_brk_args /* {
|
|
syscallarg(char *) nsize;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
char *nbrk = SCARG(uap, nsize);
|
|
struct obreak_args oba;
|
|
struct vmspace *vm = p->p_vmspace;
|
|
int error = 0;
|
|
caddr_t oldbrk, newbrk;
|
|
|
|
oldbrk = vm->vm_daddr + ctob(vm->vm_dsize);
|
|
/*
|
|
* XXX inconsistent.. Linux always returns at least the old
|
|
* brk value, but it will be page-aligned if this fails,
|
|
* and possibly not page aligned if it succeeds (the user
|
|
* supplied pointer is returned).
|
|
*/
|
|
SCARG(&oba, nsize) = nbrk;
|
|
|
|
if ((caddr_t) nbrk > vm->vm_daddr && obreak(p, &oba, retval) == 0)
|
|
retval[0] = (register_t) nbrk;
|
|
else
|
|
retval[0] = (register_t) oldbrk;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* I wonder why Linux has gettimeofday() _and_ time().. Still, we
|
|
* need to deal with it.
|
|
*/
|
|
int
|
|
linux_time(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_time_args /* {
|
|
linux_time_t *t;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct timeval atv;
|
|
linux_time_t tt;
|
|
int error;
|
|
|
|
microtime(&atv);
|
|
|
|
tt = atv.tv_sec;
|
|
if (SCARG(uap, t) && (error = copyout(&tt, SCARG(uap, t), sizeof tt)))
|
|
return error;
|
|
|
|
retval[0] = tt;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Convert BSD statfs structure to Linux statfs structure.
|
|
* The Linux structure has less fields, and it also wants
|
|
* the length of a name in a dir entry in a field, which
|
|
* we fake (probably the wrong way).
|
|
*/
|
|
static void
|
|
bsd_to_linux_statfs(bsp, lsp)
|
|
struct statfs *bsp;
|
|
struct linux_statfs *lsp;
|
|
{
|
|
lsp->l_ftype = bsp->f_type;
|
|
lsp->l_fbsize = bsp->f_bsize;
|
|
lsp->l_fblocks = bsp->f_blocks;
|
|
lsp->l_fbfree = bsp->f_bfree;
|
|
lsp->l_fbavail = bsp->f_bavail;
|
|
lsp->l_ffiles = bsp->f_files;
|
|
lsp->l_fffree = bsp->f_ffree;
|
|
lsp->l_ffsid.val[0] = bsp->f_fsid.val[0];
|
|
lsp->l_ffsid.val[1] = bsp->f_fsid.val[1];
|
|
lsp->l_fnamelen = MAXNAMLEN; /* XXX */
|
|
}
|
|
|
|
/*
|
|
* Implement the fs stat functions. Straightforward.
|
|
*/
|
|
int
|
|
linux_statfs(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_statfs_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct linux_statfs *) sp;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct statfs btmp, *bsp;
|
|
struct linux_statfs ltmp;
|
|
struct statfs_args bsa;
|
|
caddr_t sg;
|
|
int error;
|
|
|
|
sg = stackgap_init();
|
|
bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs));
|
|
|
|
CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
|
|
|
|
SCARG(&bsa, path) = SCARG(uap, path);
|
|
SCARG(&bsa, buf) = bsp;
|
|
|
|
if ((error = statfs(p, &bsa, retval)))
|
|
return error;
|
|
|
|
if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp)))
|
|
return error;
|
|
|
|
bsd_to_linux_statfs(&btmp, <mp);
|
|
|
|
return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp);
|
|
}
|
|
|
|
int
|
|
linux_fstatfs(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_fstatfs_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(struct linux_statfs *) sp;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct statfs btmp, *bsp;
|
|
struct linux_statfs ltmp;
|
|
struct fstatfs_args bsa;
|
|
caddr_t sg;
|
|
int error;
|
|
|
|
sg = stackgap_init();
|
|
bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs));
|
|
|
|
SCARG(&bsa, fd) = SCARG(uap, fd);
|
|
SCARG(&bsa, buf) = bsp;
|
|
|
|
if ((error = statfs(p, &bsa, retval)))
|
|
return error;
|
|
|
|
if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp)))
|
|
return error;
|
|
|
|
bsd_to_linux_statfs(&btmp, <mp);
|
|
|
|
return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp);
|
|
}
|
|
|
|
/*
|
|
* uname(). Just copy the info from the various strings stored in the
|
|
* kernel, and put it in the Linux utsname structure. That structure
|
|
* is almost the same as the NetBSD one, only it has fields 65 characters
|
|
* long, and an extra domainname field.
|
|
*/
|
|
int
|
|
linux_uname(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_uname_args /* {
|
|
syscallarg(struct linux_utsname *) up;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
extern char ostype[], osrelease[], version[], hostname[], domainname[];
|
|
extern char machine[];
|
|
struct linux_utsname tluts;
|
|
int len;
|
|
char *cp;
|
|
|
|
strncpy(tluts.l_sysname, ostype, sizeof (tluts.l_sysname));
|
|
strncpy(tluts.l_nodename, hostname, sizeof (tluts.l_nodename));
|
|
strncpy(tluts.l_release, osrelease, sizeof (tluts.l_release));
|
|
strncpy(tluts.l_machine, machine, sizeof (tluts.l_machine));
|
|
strncpy(tluts.l_domainname, domainname, sizeof (tluts.l_domainname));
|
|
strncpy(tluts.l_version, version, sizeof (tluts.l_version));
|
|
|
|
/* This part taken from the the uname() in libc */
|
|
len = sizeof (tluts.l_version);
|
|
for (cp = tluts.l_version; len--; ++cp)
|
|
if (*cp == '\n' || *cp == '\t')
|
|
if (len > 1)
|
|
*cp = ' ';
|
|
else
|
|
*cp = '\0';
|
|
|
|
return copyout(&tluts, SCARG(uap, up), sizeof tluts);
|
|
}
|
|
|
|
/*
|
|
* Linux wants to pass everything to a syscall in registers. However,
|
|
* mmap() has 6 of them. Oops: out of register error. They just pass
|
|
* everything in a structure.
|
|
*/
|
|
int
|
|
linux_mmap(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_mmap_args /* {
|
|
syscallarg(struct linux_mmap *) lmp;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct linux_mmap lmap;
|
|
struct mmap_args cma;
|
|
int error, flags;
|
|
|
|
if ((error = copyin(SCARG(uap, lmp), &lmap, sizeof lmap)))
|
|
return error;
|
|
|
|
flags = 0;
|
|
flags |= cvtto_bsd_mask(lmap.lm_flags, LINUX_MAP_SHARED, MAP_SHARED);
|
|
flags |= cvtto_bsd_mask(lmap.lm_flags, LINUX_MAP_PRIVATE, MAP_PRIVATE);
|
|
flags |= cvtto_bsd_mask(lmap.lm_flags, LINUX_MAP_FIXED, MAP_FIXED);
|
|
flags |= cvtto_bsd_mask(lmap.lm_flags, LINUX_MAP_ANON, MAP_ANON);
|
|
|
|
SCARG(&cma,addr) = lmap.lm_addr;
|
|
SCARG(&cma,len) = lmap.lm_len;
|
|
SCARG(&cma,prot) = lmap.lm_prot;
|
|
SCARG(&cma,flags) = flags;
|
|
SCARG(&cma,fd) = lmap.lm_fd;
|
|
SCARG(&cma,pad) = 0;
|
|
SCARG(&cma,pos) = lmap.lm_pos;
|
|
|
|
return mmap(p, &cma, retval);
|
|
}
|
|
|
|
/*
|
|
* Linux doesn't use the retval[1] value to determine whether
|
|
* we are the child or parent.
|
|
*/
|
|
int
|
|
linux_fork(p, uap, retval)
|
|
struct proc *p;
|
|
void *uap;
|
|
register_t *retval;
|
|
{
|
|
int error;
|
|
|
|
if ((error = fork(p, uap, retval)))
|
|
return error;
|
|
|
|
if (retval[1] == 1)
|
|
retval[0] = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This code is partly stolen from src/lib/libc/compat-43/times.c
|
|
* XXX - CLK_TCK isn't declared in /sys, just in <time.h>, done here
|
|
*/
|
|
|
|
#define CLK_TCK 100
|
|
#define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
|
|
|
|
int
|
|
linux_times(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_times_args /* {
|
|
syscallarg(struct times *) tms;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct timeval t;
|
|
struct linux_tms ltms;
|
|
struct rusage ru;
|
|
int error, s;
|
|
|
|
calcru(p, &ru.ru_utime, &ru.ru_stime, NULL);
|
|
ltms.ltms_utime = CONVTCK(ru.ru_utime);
|
|
ltms.ltms_stime = CONVTCK(ru.ru_stime);
|
|
|
|
ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime);
|
|
ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime);
|
|
|
|
if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms)))
|
|
return error;
|
|
|
|
s = splclock();
|
|
timersub(&time, &boottime, &t);
|
|
splx(s);
|
|
|
|
retval[0] = ((linux_clock_t)(CONVTCK(t)));
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* NetBSD passes fd[0] in retval[0], and fd[1] in retval[1].
|
|
* Linux directly passes the pointer.
|
|
*/
|
|
int
|
|
linux_pipe(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_pipe_args /* {
|
|
syscallarg(int *) pfds;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
int error;
|
|
|
|
if ((error = pipe(p, 0, retval)))
|
|
return error;
|
|
|
|
/* Assumes register_t is an int */
|
|
|
|
if ((error = copyout(retval, SCARG(uap, pfds), 2 * sizeof (int))))
|
|
return error;
|
|
|
|
retval[0] = 0;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Alarm. This is a libc call which used setitimer(2) in NetBSD.
|
|
* Fiddle with the timers to make it work.
|
|
*/
|
|
int
|
|
linux_alarm(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_alarm_args /* {
|
|
syscallarg(unsigned int) secs;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
int error, s;
|
|
struct itimerval *itp, it;
|
|
|
|
itp = &p->p_realtimer;
|
|
s = splclock();
|
|
/*
|
|
* Clear any pending timer alarms.
|
|
*/
|
|
untimeout(realitexpire, p);
|
|
timerclear(&itp->it_interval);
|
|
if (timerisset(&itp->it_value) &&
|
|
timercmp(&itp->it_value, &time, >))
|
|
timersub(&itp->it_value, &time, &itp->it_value);
|
|
/*
|
|
* Return how many seconds were left (rounded up)
|
|
*/
|
|
retval[0] = itp->it_value.tv_sec;
|
|
if (itp->it_value.tv_usec)
|
|
retval[0]++;
|
|
|
|
/*
|
|
* alarm(0) just resets the timer.
|
|
*/
|
|
if (SCARG(uap, secs) == 0) {
|
|
timerclear(&itp->it_value);
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check the new alarm time for sanity, and set it.
|
|
*/
|
|
timerclear(&it.it_interval);
|
|
it.it_value.tv_sec = SCARG(uap, secs);
|
|
it.it_value.tv_usec = 0;
|
|
if (itimerfix(&it.it_value) || itimerfix(&it.it_interval)) {
|
|
splx(s);
|
|
return (EINVAL);
|
|
}
|
|
|
|
if (timerisset(&it.it_value)) {
|
|
timeradd(&it.it_value, &time, &it.it_value);
|
|
timeout(realitexpire, p, hzto(&it.it_value));
|
|
}
|
|
p->p_realtimer = it;
|
|
splx(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* utime(). Do conversion to things that utimes() understands,
|
|
* and pass it on.
|
|
*/
|
|
int
|
|
linux_utime(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_utime_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct linux_utimbuf *)times;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
caddr_t sg;
|
|
int error;
|
|
struct utimes_args ua;
|
|
struct timeval tv[2], *tvp;
|
|
struct linux_utimbuf lut;
|
|
|
|
sg = stackgap_init();
|
|
CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
|
|
|
|
SCARG(&ua, path) = SCARG(uap, path);
|
|
|
|
if (SCARG(uap, times) != NULL) {
|
|
if ((error = copyin(SCARG(uap, times), &lut, sizeof lut)))
|
|
return error;
|
|
tv[0].tv_usec = tv[1].tv_usec = 0;
|
|
tv[0].tv_sec = lut.l_actime;
|
|
tv[1].tv_sec = lut.l_modtime;
|
|
tvp = (struct timeval *) stackgap_alloc(sizeof tv);
|
|
if ((error = copyout(tv, tvp, sizeof tv)))
|
|
return error;
|
|
SCARG(&ua, tptr) = tvp;
|
|
}
|
|
else
|
|
SCARG(&ua, tptr) = NULL;
|
|
|
|
return utimes(p, uap, retval);
|
|
}
|
|
|
|
/*
|
|
* Linux 'readdir' call. This code is mostly taken from the
|
|
* SunOS getdents call (see compat/sunos/sunos_misc.c), though
|
|
* an attempt has been made to keep it a little cleaner (failing
|
|
* miserably, because of the cruft needed if count 1 is passed).
|
|
*
|
|
* Read in BSD-style entries, convert them, and copy them out.
|
|
* Note that the Linux d_reclen is actually the name length,
|
|
* and d_off is the reclen.
|
|
*
|
|
* Note that this doesn't handle union-mounted filesystems.
|
|
*/
|
|
int
|
|
linux_readdir(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_readdir_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(struct linux_dirent *) dent;
|
|
syscallarg(unsigned int) count;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct dirent *bdp;
|
|
struct vnode *vp;
|
|
caddr_t inp, buf; /* BSD-format */
|
|
int len, reclen; /* BSD-format */
|
|
caddr_t outp; /* Linux-format */
|
|
int resid, linuxreclen; /* Linux-format */
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
struct linux_dirent idb;
|
|
off_t off; /* true file offset */
|
|
linux_off_t soff; /* Linux file offset */
|
|
int buflen, error, eofflag, nbytes, justone;
|
|
struct vattr va;
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
|
|
if ((fp->f_flag & FREAD) == 0)
|
|
return (EBADF);
|
|
|
|
vp = (struct vnode *) fp->f_data;
|
|
|
|
if (vp->v_type != VDIR) /* XXX vnode readdir op should do this */
|
|
return (EINVAL);
|
|
|
|
if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)))
|
|
return error;
|
|
|
|
nbytes = SCARG(uap, count);
|
|
if (nbytes == 1) { /* Need this for older Linux libs, apparently */
|
|
nbytes = sizeof (struct linux_dirent);
|
|
justone = 1;
|
|
}
|
|
else
|
|
justone = 0;
|
|
|
|
buflen = max(va.va_blocksize, nbytes);
|
|
buf = malloc(buflen, M_TEMP, M_WAITOK);
|
|
VOP_LOCK(vp);
|
|
off = fp->f_offset;
|
|
again:
|
|
aiov.iov_base = buf;
|
|
aiov.iov_len = buflen;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_SYSSPACE;
|
|
auio.uio_procp = p;
|
|
auio.uio_resid = buflen;
|
|
auio.uio_offset = off;
|
|
/*
|
|
* First we read into the malloc'ed buffer, then
|
|
* we massage it into user space, one record at a time.
|
|
*/
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (u_long *) 0, 0);
|
|
if (error)
|
|
goto out;
|
|
|
|
inp = buf;
|
|
outp = (caddr_t) SCARG(uap, dent);
|
|
resid = nbytes;
|
|
if ((len = buflen - auio.uio_resid) == 0)
|
|
goto eof;
|
|
|
|
for (; len > 0; len -= reclen) {
|
|
reclen = ((struct dirent *) inp)->d_reclen;
|
|
if (reclen & 3)
|
|
panic("linux_readdir");
|
|
off += reclen; /* each entry points to next */
|
|
bdp = (struct dirent *) inp;
|
|
if (bdp->d_fileno == 0) {
|
|
inp += reclen; /* it is a hole; squish it out */
|
|
continue;
|
|
}
|
|
linuxreclen = LINUX_RECLEN(&idb, bdp->d_namlen);
|
|
if (reclen > len || resid < linuxreclen) {
|
|
/* entry too big for buffer, so just stop */
|
|
outp++;
|
|
break;
|
|
}
|
|
/*
|
|
* Massage in place to make a Linux-shaped dirent (otherwise
|
|
* we have to worry about touching user memory outside of
|
|
* the copyout() call).
|
|
*/
|
|
idb.l_dino = (long) bdp->d_fileno;
|
|
idb.l_doff = (linux_off_t) linuxreclen;
|
|
idb.l_dreclen = (u_short) bdp->d_namlen; /* sigh */
|
|
strcpy(idb.l_dname, bdp->d_name);
|
|
if ((error = copyout((caddr_t)&idb, outp, linuxreclen)))
|
|
goto out;
|
|
/* advance past this real entry */
|
|
inp += reclen;
|
|
/* advance output past Linux-shaped entry */
|
|
outp += linuxreclen;
|
|
resid -= linuxreclen;
|
|
if (justone)
|
|
break;
|
|
}
|
|
|
|
/* if we squished out the whole block, try again */
|
|
if (outp == (caddr_t) SCARG(uap, dent))
|
|
goto again;
|
|
fp->f_offset = off; /* update the vnode offset */
|
|
|
|
if (justone)
|
|
nbytes = resid + linuxreclen;
|
|
|
|
eof:
|
|
*retval = nbytes - resid;
|
|
out:
|
|
VOP_UNLOCK(vp);
|
|
free(buf, M_TEMP);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Out of register error once more.. Apart from that, no difference.
|
|
*/
|
|
int
|
|
linux_select(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_select_args /* {
|
|
syscallarg(struct linux_select *) lsp;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct linux_select ls;
|
|
struct select_args bsa;
|
|
int error;
|
|
|
|
if ((error = copyin(SCARG(uap, lsp), (caddr_t) &ls, sizeof ls)))
|
|
return error;
|
|
|
|
SCARG(&bsa, nd) = ls.nfds;
|
|
SCARG(&bsa, in) = ls.readfds;
|
|
SCARG(&bsa, ou) = ls.writefds;
|
|
SCARG(&bsa, ex) = ls.exceptfds;
|
|
SCARG(&bsa, tv) = ls.timeout;
|
|
|
|
return select(p, &bsa, retval);
|
|
}
|
|
|
|
/*
|
|
* Get the process group of a certain process. Look it up
|
|
* and return the value.
|
|
*/
|
|
int
|
|
linux_getpgid(p, uap, retval)
|
|
struct proc *p;
|
|
struct linux_getpgid_args /* {
|
|
syscallarg(int) pid;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct proc *targp;
|
|
|
|
if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid)
|
|
if ((targp = pfind(SCARG(uap, pid))) == 0)
|
|
return ESRCH;
|
|
else
|
|
targp = p;
|
|
|
|
retval[0] = targp->p_pgid;
|
|
return 0;
|
|
}
|