41df5ed40a
1998-03-01 Richard Henderson <rth@cygnus.com> * shlib-versions: Match alpha*. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Add adjtimex. * sysdeps/unix/sysv/linux/alpha/adjtimex.S: Remove. * sysdeps/alpha/fpu/bits/mathinline.h (isunordered et al): New. Implement copysign* with and without __ prefix. Likewise for fabs; use builtin for gcc 2.8. (floor*): New. (fdim*): New. * elf/elf.h (EF_SPARC*, EF_ALPHA*, SHT_ALPHA*, SHF_ALPHA*): New. (R_SPARC*): Match current v9 ABI. * sysdeps/wordsize-64/stdint.h (intptr_t): Is a long. * sunrpc/clnt_udp.c (clntudp_call): Use socklen_t. * sunrpc/pmap_rmt.c (clnt_broadcast): Likewise. * sunrpc/svc_tcp.c (svctcp_create, rendezvous_request): Likewise. * sysdeps/generic/getresgid.c: Use prototype form because of warning. * sysdeps/unix/sysv/linux/getdents.c: Likewise. * sysdeps/unix/sysv/linux/alpha/adjtime.c: Likewise. * sysdeps/unix/grantpt.c (argv): Fix consts. * sysdeps/unix/sysv/linux/getpt.c: Include <string.h> * sysdeps/unix/sysv/linux/sigaction.c: Likewise.
112 lines
2.8 KiB
C
112 lines
2.8 KiB
C
/* Copyright (C) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <assert.h>
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#include "pty-internal.h"
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/* Given a fd on a master pseudoterminal, chown the file associated
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with the slave to the calling process, and set its group and
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mode appropriately. Note that this is an unprivileged operation. */
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/* This "generic Unix" implementation works because we provide the program
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/usr/libexec/pt_chown, and it only depends on ptsname() working. */
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static const char helper[] = LIBEXECDIR "/pt_chown";
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static const char *const argv[] = { "pt_chown", NULL };
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int
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grantpt (fd)
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int fd;
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{
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struct stat st;
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int w, pid;
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char namebuf[PTYNAMELEN];
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/* Some systems do it for us. */
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if (ptsname_r (fd, namebuf, PTYNAMELEN) == NULL)
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return -1;
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if (stat (namebuf, &st))
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return -1;
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if (st.st_uid == getuid ())
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return 0;
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/* We have to do it in user space. */
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pid = fork ();
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if (pid == -1)
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return -1;
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else if (pid == 0)
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{
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/* Disable core dumps in the child. */
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struct rlimit off = { 0, 0 };
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setrlimit (RLIMIT_CORE, &off);
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/* The helper does its thing on fd PTY_FD. */
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if (fd != PTY_FD)
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if (dup2 (fd, PTY_FD) == -1)
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_exit (FAIL_EBADF);
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execve (helper, argv, 0);
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_exit (FAIL_EXEC);
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}
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else
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{
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if (waitpid (pid, &w, 0) == -1)
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return -1;
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if (!WIFEXITED (w))
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{
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__set_errno (ENOEXEC);
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return -1;
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}
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else
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switch (WEXITSTATUS(w))
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{
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case 0:
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break;
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case FAIL_EBADF:
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__set_errno (EBADF);
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return -1;
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case FAIL_EINVAL:
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__set_errno (EINVAL);
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return -1;
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case FAIL_EACCES:
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__set_errno (EACCES);
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return -1;
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case FAIL_EXEC:
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__set_errno (ENOEXEC);
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return -1;
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default:
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assert(! "getpt: internal error: invalid exit code from pt_chown");
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}
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}
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/* Success. */
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return 0;
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}
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