1 /* Remote File-I/O communications
3 Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 /* See the GDB User Guide for details of the GDB remote protocol. */
24 #include "gdb_string.h"
27 #include "gdb/fileio.h"
30 #include "exceptions.h"
31 #include "remote-fileio.h"
32 #include "event-loop.h"
37 #include <sys/cygwin.h> /* For cygwin_conv_to_full_posix_path. */
46 #define FIO_FD_INVALID -1
47 #define FIO_FD_CONSOLE_IN -2
48 #define FIO_FD_CONSOLE_OUT -3
50 static int remote_fio_system_call_allowed = 0;
52 static struct async_signal_handler *sigint_fileio_token;
55 remote_fileio_init_fd_map (void)
59 if (!remote_fio_data.fd_map)
61 remote_fio_data.fd_map = (int *) xmalloc (10 * sizeof (int));
62 remote_fio_data.fd_map_size = 10;
63 remote_fio_data.fd_map[0] = FIO_FD_CONSOLE_IN;
64 remote_fio_data.fd_map[1] = FIO_FD_CONSOLE_OUT;
65 remote_fio_data.fd_map[2] = FIO_FD_CONSOLE_OUT;
66 for (i = 3; i < 10; ++i)
67 remote_fio_data.fd_map[i] = FIO_FD_INVALID;
73 remote_fileio_resize_fd_map (void)
75 int i = remote_fio_data.fd_map_size;
77 if (!remote_fio_data.fd_map)
78 return remote_fileio_init_fd_map ();
79 remote_fio_data.fd_map_size += 10;
80 remote_fio_data.fd_map =
81 (int *) xrealloc (remote_fio_data.fd_map,
82 remote_fio_data.fd_map_size * sizeof (int));
83 for (; i < remote_fio_data.fd_map_size; i++)
84 remote_fio_data.fd_map[i] = FIO_FD_INVALID;
85 return remote_fio_data.fd_map_size - 10;
89 remote_fileio_next_free_fd (void)
93 for (i = 0; i < remote_fio_data.fd_map_size; ++i)
94 if (remote_fio_data.fd_map[i] == FIO_FD_INVALID)
96 return remote_fileio_resize_fd_map ();
100 remote_fileio_fd_to_targetfd (int fd)
102 int target_fd = remote_fileio_next_free_fd ();
103 remote_fio_data.fd_map[target_fd] = fd;
108 remote_fileio_map_fd (int target_fd)
110 remote_fileio_init_fd_map ();
111 if (target_fd < 0 || target_fd >= remote_fio_data.fd_map_size)
112 return FIO_FD_INVALID;
113 return remote_fio_data.fd_map[target_fd];
117 remote_fileio_close_target_fd (int target_fd)
119 remote_fileio_init_fd_map ();
120 if (target_fd >= 0 && target_fd < remote_fio_data.fd_map_size)
121 remote_fio_data.fd_map[target_fd] = FIO_FD_INVALID;
125 remote_fileio_oflags_to_host (long flags)
129 if (flags & FILEIO_O_CREAT)
131 if (flags & FILEIO_O_EXCL)
133 if (flags & FILEIO_O_TRUNC)
135 if (flags & FILEIO_O_APPEND)
137 if (flags & FILEIO_O_RDONLY)
139 if (flags & FILEIO_O_WRONLY)
141 if (flags & FILEIO_O_RDWR)
143 /* On systems supporting binary and text mode, always open files in
152 remote_fileio_mode_to_host (long mode, int open_call)
158 if (mode & FILEIO_S_IFREG)
160 if (mode & FILEIO_S_IFDIR)
162 if (mode & FILEIO_S_IFCHR)
165 if (mode & FILEIO_S_IRUSR)
167 if (mode & FILEIO_S_IWUSR)
169 if (mode & FILEIO_S_IXUSR)
172 if (mode & FILEIO_S_IRGRP)
176 if (mode & FILEIO_S_IWGRP)
180 if (mode & FILEIO_S_IXGRP)
183 if (mode & FILEIO_S_IROTH)
186 if (mode & FILEIO_S_IWOTH)
190 if (mode & FILEIO_S_IXOTH)
197 remote_fileio_mode_to_target (mode_t mode)
202 tmode |= FILEIO_S_IFREG;
204 tmode |= FILEIO_S_IFDIR;
206 tmode |= FILEIO_S_IFCHR;
208 tmode |= FILEIO_S_IRUSR;
210 tmode |= FILEIO_S_IWUSR;
212 tmode |= FILEIO_S_IXUSR;
215 tmode |= FILEIO_S_IRGRP;
219 tmode |= FILEIO_S_IWGRP;
223 tmode |= FILEIO_S_IXGRP;
226 tmode |= FILEIO_S_IROTH;
229 tmode |= FILEIO_S_IWOTH;
233 tmode |= FILEIO_S_IXOTH;
239 remote_fileio_errno_to_target (int error)
246 return FILEIO_ENOENT;
254 return FILEIO_EACCES;
256 return FILEIO_EFAULT;
260 return FILEIO_EEXIST;
262 return FILEIO_ENODEV;
264 return FILEIO_ENOTDIR;
266 return FILEIO_EISDIR;
268 return FILEIO_EINVAL;
270 return FILEIO_ENFILE;
272 return FILEIO_EMFILE;
276 return FILEIO_ENOSPC;
278 return FILEIO_ESPIPE;
282 return FILEIO_ENOSYS;
284 return FILEIO_ENAMETOOLONG;
286 return FILEIO_EUNKNOWN;
290 remote_fileio_seek_flag_to_host (long num, int *flag)
296 case FILEIO_SEEK_SET:
299 case FILEIO_SEEK_CUR:
302 case FILEIO_SEEK_END:
312 remote_fileio_extract_long (char **buf, LONGEST *retlong)
317 if (!buf || !*buf || !**buf || !retlong)
319 c = strchr (*buf, ',');
323 c = strchr (*buf, '\0');
324 while (strchr ("+-", **buf))
330 for (*retlong = 0; **buf; ++*buf)
333 if (**buf >= '0' && **buf <= '9')
334 *retlong += **buf - '0';
335 else if (**buf >= 'a' && **buf <= 'f')
336 *retlong += **buf - 'a' + 10;
337 else if (**buf >= 'A' && **buf <= 'F')
338 *retlong += **buf - 'A' + 10;
348 remote_fileio_extract_int (char **buf, long *retint)
355 ret = remote_fileio_extract_long (buf, &retlong);
357 *retint = (long) retlong;
362 remote_fileio_extract_ptr_w_len (char **buf, CORE_ADDR *ptrval, int *length)
367 if (!buf || !*buf || !**buf || !ptrval || !length)
369 c = strchr (*buf, '/');
373 if (remote_fileio_extract_long (buf, &retlong))
375 *ptrval = (CORE_ADDR) retlong;
377 if (remote_fileio_extract_long (buf, &retlong))
379 *length = (int) retlong;
383 /* Convert to big endian */
385 remote_fileio_to_be (LONGEST num, char *buf, int bytes)
389 for (i = 0; i < bytes; ++i)
390 buf[i] = (num >> (8 * (bytes - i - 1))) & 0xff;
394 remote_fileio_to_fio_uint (long num, fio_uint_t fnum)
396 remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4);
400 remote_fileio_to_fio_mode (mode_t num, fio_mode_t fnum)
402 remote_fileio_to_be (remote_fileio_mode_to_target(num), (char *) fnum, 4);
406 remote_fileio_to_fio_time (time_t num, fio_time_t fnum)
408 remote_fileio_to_be ((LONGEST) num, (char *) fnum, 4);
412 remote_fileio_to_fio_long (LONGEST num, fio_long_t fnum)
414 remote_fileio_to_be (num, (char *) fnum, 8);
418 remote_fileio_to_fio_ulong (LONGEST num, fio_ulong_t fnum)
420 remote_fileio_to_be (num, (char *) fnum, 8);
424 remote_fileio_to_fio_stat (struct stat *st, struct fio_stat *fst)
428 /* `st_dev' is set in the calling function */
429 remote_fileio_to_fio_uint ((long) st->st_ino, fst->fst_ino);
430 remote_fileio_to_fio_mode (st->st_mode, fst->fst_mode);
431 remote_fileio_to_fio_uint ((long) st->st_nlink, fst->fst_nlink);
432 remote_fileio_to_fio_uint ((long) st->st_uid, fst->fst_uid);
433 remote_fileio_to_fio_uint ((long) st->st_gid, fst->fst_gid);
434 remote_fileio_to_fio_uint ((long) st->st_rdev, fst->fst_rdev);
435 remote_fileio_to_fio_ulong ((LONGEST) st->st_size, fst->fst_size);
436 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
437 blksize = st->st_blksize;
441 remote_fileio_to_fio_ulong (blksize, fst->fst_blksize);
442 #if HAVE_STRUCT_STAT_ST_BLOCKS
443 remote_fileio_to_fio_ulong ((LONGEST) st->st_blocks, fst->fst_blocks);
445 /* FIXME: This is correct for DJGPP, but other systems that don't
446 have st_blocks, if any, might prefer 512 instead of st_blksize.
447 (eliz, 30-12-2003) */
448 remote_fileio_to_fio_ulong (((LONGEST) st->st_size + blksize - 1)
452 remote_fileio_to_fio_time (st->st_atime, fst->fst_atime);
453 remote_fileio_to_fio_time (st->st_mtime, fst->fst_mtime);
454 remote_fileio_to_fio_time (st->st_ctime, fst->fst_ctime);
458 remote_fileio_to_fio_timeval (struct timeval *tv, struct fio_timeval *ftv)
460 remote_fileio_to_fio_time (tv->tv_sec, ftv->ftv_sec);
461 remote_fileio_to_fio_long (tv->tv_usec, ftv->ftv_usec);
464 static int remote_fio_ctrl_c_flag = 0;
465 static int remote_fio_no_longjmp = 0;
467 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
468 static struct sigaction remote_fio_sa;
469 static struct sigaction remote_fio_osa;
471 static void (*remote_fio_ofunc)(int);
475 remote_fileio_sig_init (void)
477 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
478 remote_fio_sa.sa_handler = SIG_IGN;
479 sigemptyset (&remote_fio_sa.sa_mask);
480 remote_fio_sa.sa_flags = 0;
481 sigaction (SIGINT, &remote_fio_sa, &remote_fio_osa);
483 remote_fio_ofunc = signal (SIGINT, SIG_IGN);
488 remote_fileio_sig_set (void (*sigint_func)(int))
490 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
491 remote_fio_sa.sa_handler = sigint_func;
492 sigemptyset (&remote_fio_sa.sa_mask);
493 remote_fio_sa.sa_flags = 0;
494 sigaction (SIGINT, &remote_fio_sa, NULL);
496 signal (SIGINT, sigint_func);
501 remote_fileio_sig_exit (void)
503 #if defined (HAVE_SIGACTION) && defined (SA_RESTART)
504 sigaction (SIGINT, &remote_fio_osa, NULL);
506 signal (SIGINT, remote_fio_ofunc);
511 async_remote_fileio_interrupt (gdb_client_data arg)
513 deprecated_throw_reason (RETURN_QUIT);
517 remote_fileio_ctrl_c_signal_handler (int signo)
519 remote_fileio_sig_set (SIG_IGN);
520 remote_fio_ctrl_c_flag = 1;
521 if (!remote_fio_no_longjmp)
522 gdb_call_async_signal_handler (sigint_fileio_token, 1);
523 remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler);
527 remote_fileio_reply (int retcode, int error)
531 remote_fileio_sig_set (SIG_IGN);
538 sprintf (buf + strlen (buf), "%x", retcode);
539 if (error || remote_fio_ctrl_c_flag)
541 if (error && remote_fio_ctrl_c_flag)
542 error = FILEIO_EINTR;
548 sprintf (buf + strlen (buf), ",%x", error);
549 if (remote_fio_ctrl_c_flag)
552 remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler);
557 remote_fileio_ioerror (void)
559 remote_fileio_reply (-1, FILEIO_EIO);
563 remote_fileio_badfd (void)
565 remote_fileio_reply (-1, FILEIO_EBADF);
569 remote_fileio_return_errno (int retcode)
571 remote_fileio_reply (retcode,
572 retcode < 0 ? remote_fileio_errno_to_target (errno) : 0);
576 remote_fileio_return_success (int retcode)
578 remote_fileio_reply (retcode, 0);
581 /* Wrapper function for remote_write_bytes() which has the disadvantage to
582 write only one packet, regardless of the requested number of bytes to
583 transfer. This wrapper calls remote_write_bytes() as often as needed. */
585 remote_fileio_write_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
587 int ret = 0, written;
589 while (len > 0 && (written = remote_write_bytes (memaddr, myaddr, len)) > 0)
600 remote_fileio_func_open (char *buf)
603 int length, retlength;
610 /* 1. Parameter: Ptr to pathname / length incl. trailing zero */
611 if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length))
613 remote_fileio_ioerror ();
616 /* 2. Parameter: open flags */
617 if (remote_fileio_extract_int (&buf, &num))
619 remote_fileio_ioerror ();
622 flags = remote_fileio_oflags_to_host (num);
623 /* 3. Parameter: open mode */
624 if (remote_fileio_extract_int (&buf, &num))
626 remote_fileio_ioerror ();
629 mode = remote_fileio_mode_to_host (num, 1);
631 /* Request pathname using 'm' packet */
632 pathname = alloca (length);
633 retlength = remote_read_bytes (ptrval, (gdb_byte *) pathname, length);
634 if (retlength != length)
636 remote_fileio_ioerror ();
640 /* Check if pathname exists and is not a regular file or directory. If so,
641 return an appropriate error code. Same for trying to open directories
643 if (!stat (pathname, &st))
645 if (!S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode))
647 remote_fileio_reply (-1, FILEIO_ENODEV);
650 if (S_ISDIR (st.st_mode)
651 && ((flags & O_WRONLY) == O_WRONLY || (flags & O_RDWR) == O_RDWR))
653 remote_fileio_reply (-1, FILEIO_EISDIR);
658 remote_fio_no_longjmp = 1;
659 fd = open (pathname, flags, mode);
662 remote_fileio_return_errno (-1);
666 fd = remote_fileio_fd_to_targetfd (fd);
667 remote_fileio_return_success (fd);
671 remote_fileio_func_close (char *buf)
676 /* Parameter: file descriptor */
677 if (remote_fileio_extract_int (&buf, &num))
679 remote_fileio_ioerror ();
682 fd = remote_fileio_map_fd ((int) num);
683 if (fd == FIO_FD_INVALID)
685 remote_fileio_badfd ();
689 remote_fio_no_longjmp = 1;
690 if (fd != FIO_FD_CONSOLE_IN && fd != FIO_FD_CONSOLE_OUT && close (fd))
691 remote_fileio_return_errno (-1);
692 remote_fileio_close_target_fd ((int) num);
693 remote_fileio_return_success (0);
697 remote_fileio_func_read (char *buf)
702 int fd, ret, retlength;
705 off_t old_offset, new_offset;
707 /* 1. Parameter: file descriptor */
708 if (remote_fileio_extract_int (&buf, &target_fd))
710 remote_fileio_ioerror ();
713 fd = remote_fileio_map_fd ((int) target_fd);
714 if (fd == FIO_FD_INVALID)
716 remote_fileio_badfd ();
719 /* 2. Parameter: buffer pointer */
720 if (remote_fileio_extract_long (&buf, &lnum))
722 remote_fileio_ioerror ();
725 ptrval = (CORE_ADDR) lnum;
726 /* 3. Parameter: buffer length */
727 if (remote_fileio_extract_int (&buf, &num))
729 remote_fileio_ioerror ();
732 length = (size_t) num;
736 case FIO_FD_CONSOLE_OUT:
737 remote_fileio_badfd ();
739 case FIO_FD_CONSOLE_IN:
741 static char *remaining_buf = NULL;
742 static int remaining_length = 0;
744 buffer = (gdb_byte *) xmalloc (32768);
747 remote_fio_no_longjmp = 1;
748 if (remaining_length > length)
750 memcpy (buffer, remaining_buf, length);
751 memmove (remaining_buf, remaining_buf + length,
752 remaining_length - length);
753 remaining_length -= length;
758 memcpy (buffer, remaining_buf, remaining_length);
759 xfree (remaining_buf);
760 remaining_buf = NULL;
761 ret = remaining_length;
766 ret = ui_file_read (gdb_stdtargin, (char *) buffer, 32767);
767 remote_fio_no_longjmp = 1;
768 if (ret > 0 && (size_t)ret > length)
770 remaining_buf = (char *) xmalloc (ret - length);
771 remaining_length = ret - length;
772 memcpy (remaining_buf, buffer + length, remaining_length);
779 buffer = (gdb_byte *) xmalloc (length);
780 /* POSIX defines EINTR behaviour of read in a weird way. It's allowed
781 for read() to return -1 even if "some" bytes have been read. It
782 has been corrected in SUSv2 but that doesn't help us much...
783 Therefore a complete solution must check how many bytes have been
784 read on EINTR to return a more reliable value to the target */
785 old_offset = lseek (fd, 0, SEEK_CUR);
786 remote_fio_no_longjmp = 1;
787 ret = read (fd, buffer, length);
788 if (ret < 0 && errno == EINTR)
790 new_offset = lseek (fd, 0, SEEK_CUR);
791 /* If some data has been read, return the number of bytes read.
792 The Ctrl-C flag is set in remote_fileio_reply() anyway */
793 if (old_offset != new_offset)
794 ret = new_offset - old_offset;
801 retlength = remote_fileio_write_bytes (ptrval, buffer, ret);
802 if (retlength != ret)
803 ret = -1; /* errno has been set to EIO in remote_fileio_write_bytes() */
807 remote_fileio_return_errno (-1);
809 remote_fileio_return_success (ret);
815 remote_fileio_func_write (char *buf)
820 int fd, ret, retlength;
824 /* 1. Parameter: file descriptor */
825 if (remote_fileio_extract_int (&buf, &target_fd))
827 remote_fileio_ioerror ();
830 fd = remote_fileio_map_fd ((int) target_fd);
831 if (fd == FIO_FD_INVALID)
833 remote_fileio_badfd ();
836 /* 2. Parameter: buffer pointer */
837 if (remote_fileio_extract_long (&buf, &lnum))
839 remote_fileio_ioerror ();
842 ptrval = (CORE_ADDR) lnum;
843 /* 3. Parameter: buffer length */
844 if (remote_fileio_extract_int (&buf, &num))
846 remote_fileio_ioerror ();
849 length = (size_t) num;
851 buffer = (gdb_byte *) xmalloc (length);
852 retlength = remote_read_bytes (ptrval, buffer, length);
853 if (retlength != length)
856 remote_fileio_ioerror ();
860 remote_fio_no_longjmp = 1;
863 case FIO_FD_CONSOLE_IN:
864 remote_fileio_badfd ();
867 case FIO_FD_CONSOLE_OUT:
868 ui_file_write (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr,
869 (char *) buffer, length);
870 gdb_flush (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr);
874 ret = write (fd, buffer, length);
875 if (ret < 0 && errno == EACCES)
876 errno = EBADF; /* Cygwin returns EACCESS when writing to a R/O file.*/
881 remote_fileio_return_errno (-1);
883 remote_fileio_return_success (ret);
889 remote_fileio_func_lseek (char *buf)
896 /* 1. Parameter: file descriptor */
897 if (remote_fileio_extract_int (&buf, &num))
899 remote_fileio_ioerror ();
902 fd = remote_fileio_map_fd ((int) num);
903 if (fd == FIO_FD_INVALID)
905 remote_fileio_badfd ();
908 else if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT)
910 remote_fileio_reply (-1, FILEIO_ESPIPE);
914 /* 2. Parameter: offset */
915 if (remote_fileio_extract_long (&buf, &lnum))
917 remote_fileio_ioerror ();
920 offset = (off_t) lnum;
921 /* 3. Parameter: flag */
922 if (remote_fileio_extract_int (&buf, &num))
924 remote_fileio_ioerror ();
927 if (remote_fileio_seek_flag_to_host (num, &flag))
929 remote_fileio_reply (-1, FILEIO_EINVAL);
933 remote_fio_no_longjmp = 1;
934 ret = lseek (fd, offset, flag);
936 if (ret == (off_t) -1)
937 remote_fileio_return_errno (-1);
939 remote_fileio_return_success (ret);
943 remote_fileio_func_rename (char *buf)
945 CORE_ADDR old_ptr, new_ptr;
946 int old_len, new_len, retlength;
947 char *oldpath, *newpath;
949 struct stat ost, nst;
951 /* 1. Parameter: Ptr to oldpath / length incl. trailing zero */
952 if (remote_fileio_extract_ptr_w_len (&buf, &old_ptr, &old_len))
954 remote_fileio_ioerror ();
958 /* 2. Parameter: Ptr to newpath / length incl. trailing zero */
959 if (remote_fileio_extract_ptr_w_len (&buf, &new_ptr, &new_len))
961 remote_fileio_ioerror ();
965 /* Request oldpath using 'm' packet */
966 oldpath = alloca (old_len);
967 retlength = remote_read_bytes (old_ptr, (gdb_byte *) oldpath, old_len);
968 if (retlength != old_len)
970 remote_fileio_ioerror ();
974 /* Request newpath using 'm' packet */
975 newpath = alloca (new_len);
976 retlength = remote_read_bytes (new_ptr, (gdb_byte *) newpath, new_len);
977 if (retlength != new_len)
979 remote_fileio_ioerror ();
983 /* Only operate on regular files and directories */
984 of = stat (oldpath, &ost);
985 nf = stat (newpath, &nst);
986 if ((!of && !S_ISREG (ost.st_mode) && !S_ISDIR (ost.st_mode))
987 || (!nf && !S_ISREG (nst.st_mode) && !S_ISDIR (nst.st_mode)))
989 remote_fileio_reply (-1, FILEIO_EACCES);
993 remote_fio_no_longjmp = 1;
994 ret = rename (oldpath, newpath);
998 /* Special case: newpath is a non-empty directory. Some systems
999 return ENOTEMPTY, some return EEXIST. We coerce that to be
1001 if (errno == ENOTEMPTY)
1004 /* Workaround some Cygwin problems with correct errnos. */
1005 if (errno == EACCES)
1007 if (!of && !nf && S_ISDIR (nst.st_mode))
1009 if (S_ISREG (ost.st_mode))
1013 char oldfullpath[PATH_MAX + 1];
1014 char newfullpath[PATH_MAX + 1];
1017 cygwin_conv_to_full_posix_path (oldpath, oldfullpath);
1018 cygwin_conv_to_full_posix_path (newpath, newfullpath);
1019 len = strlen (oldfullpath);
1020 if (newfullpath[len] == '/'
1021 && !strncmp (oldfullpath, newfullpath, len))
1030 remote_fileio_return_errno (-1);
1033 remote_fileio_return_success (ret);
1037 remote_fileio_func_unlink (char *buf)
1040 int length, retlength;
1045 /* Parameter: Ptr to pathname / length incl. trailing zero */
1046 if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length))
1048 remote_fileio_ioerror ();
1051 /* Request pathname using 'm' packet */
1052 pathname = alloca (length);
1053 retlength = remote_read_bytes (ptrval, (gdb_byte *) pathname, length);
1054 if (retlength != length)
1056 remote_fileio_ioerror ();
1060 /* Only operate on regular files (and directories, which allows to return
1061 the correct return code) */
1062 if (!stat (pathname, &st) && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode))
1064 remote_fileio_reply (-1, FILEIO_ENODEV);
1068 remote_fio_no_longjmp = 1;
1069 ret = unlink (pathname);
1072 remote_fileio_return_errno (-1);
1074 remote_fileio_return_success (ret);
1078 remote_fileio_func_stat (char *buf)
1080 CORE_ADDR statptr, nameptr;
1081 int ret, namelength, retlength;
1085 struct fio_stat fst;
1087 /* 1. Parameter: Ptr to pathname / length incl. trailing zero */
1088 if (remote_fileio_extract_ptr_w_len (&buf, &nameptr, &namelength))
1090 remote_fileio_ioerror ();
1094 /* 2. Parameter: Ptr to struct stat */
1095 if (remote_fileio_extract_long (&buf, &lnum))
1097 remote_fileio_ioerror ();
1100 statptr = (CORE_ADDR) lnum;
1102 /* Request pathname using 'm' packet */
1103 pathname = alloca (namelength);
1104 retlength = remote_read_bytes (nameptr, (gdb_byte *) pathname, namelength);
1105 if (retlength != namelength)
1107 remote_fileio_ioerror ();
1111 remote_fio_no_longjmp = 1;
1112 ret = stat (pathname, &st);
1116 remote_fileio_return_errno (-1);
1119 /* Only operate on regular files and directories */
1120 if (!ret && !S_ISREG (st.st_mode) && !S_ISDIR (st.st_mode))
1122 remote_fileio_reply (-1, FILEIO_EACCES);
1127 remote_fileio_to_fio_stat (&st, &fst);
1128 remote_fileio_to_fio_uint (0, fst.fst_dev);
1130 retlength = remote_fileio_write_bytes (statptr,
1131 (gdb_byte *) &fst, sizeof fst);
1132 if (retlength != sizeof fst)
1134 remote_fileio_return_errno (-1);
1138 remote_fileio_return_success (ret);
1142 remote_fileio_func_fstat (char *buf)
1145 int fd, ret, retlength;
1149 struct fio_stat fst;
1152 /* 1. Parameter: file descriptor */
1153 if (remote_fileio_extract_int (&buf, &target_fd))
1155 remote_fileio_ioerror ();
1158 fd = remote_fileio_map_fd ((int) target_fd);
1159 if (fd == FIO_FD_INVALID)
1161 remote_fileio_badfd ();
1164 /* 2. Parameter: Ptr to struct stat */
1165 if (remote_fileio_extract_long (&buf, &lnum))
1167 remote_fileio_ioerror ();
1170 ptrval = (CORE_ADDR) lnum;
1172 remote_fio_no_longjmp = 1;
1173 if (fd == FIO_FD_CONSOLE_IN || fd == FIO_FD_CONSOLE_OUT)
1175 remote_fileio_to_fio_uint (1, fst.fst_dev);
1176 st.st_mode = S_IFCHR | (fd == FIO_FD_CONSOLE_IN ? S_IRUSR : S_IWUSR);
1179 st.st_uid = getuid ();
1184 st.st_gid = getgid ();
1190 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1191 st.st_blksize = 512;
1193 #if HAVE_STRUCT_STAT_ST_BLOCKS
1196 if (!gettimeofday (&tv, NULL))
1197 st.st_atime = st.st_mtime = st.st_ctime = tv.tv_sec;
1199 st.st_atime = st.st_mtime = st.st_ctime = (time_t) 0;
1203 ret = fstat (fd, &st);
1207 remote_fileio_return_errno (-1);
1212 remote_fileio_to_fio_stat (&st, &fst);
1214 retlength = remote_fileio_write_bytes (ptrval, (gdb_byte *) &fst, sizeof fst);
1215 if (retlength != sizeof fst)
1217 remote_fileio_return_errno (-1);
1221 remote_fileio_return_success (ret);
1225 remote_fileio_func_gettimeofday (char *buf)
1231 struct fio_timeval ftv;
1233 /* 1. Parameter: struct timeval pointer */
1234 if (remote_fileio_extract_long (&buf, &lnum))
1236 remote_fileio_ioerror ();
1239 ptrval = (CORE_ADDR) lnum;
1240 /* 2. Parameter: some pointer value... */
1241 if (remote_fileio_extract_long (&buf, &lnum))
1243 remote_fileio_ioerror ();
1246 /* ...which has to be NULL */
1249 remote_fileio_reply (-1, FILEIO_EINVAL);
1253 remote_fio_no_longjmp = 1;
1254 ret = gettimeofday (&tv, NULL);
1258 remote_fileio_return_errno (-1);
1264 remote_fileio_to_fio_timeval (&tv, &ftv);
1266 retlength = remote_fileio_write_bytes (ptrval, (gdb_byte *) &ftv, sizeof ftv);
1267 if (retlength != sizeof ftv)
1269 remote_fileio_return_errno (-1);
1273 remote_fileio_return_success (ret);
1277 remote_fileio_func_isatty (char *buf)
1282 /* Parameter: file descriptor */
1283 if (remote_fileio_extract_int (&buf, &target_fd))
1285 remote_fileio_ioerror ();
1288 remote_fio_no_longjmp = 1;
1289 fd = remote_fileio_map_fd ((int) target_fd);
1290 remote_fileio_return_success (fd == FIO_FD_CONSOLE_IN ||
1291 fd == FIO_FD_CONSOLE_OUT ? 1 : 0);
1295 remote_fileio_func_system (char *buf)
1298 int ret, length, retlength;
1299 char *cmdline = NULL;
1301 /* Parameter: Ptr to commandline / length incl. trailing zero */
1302 if (remote_fileio_extract_ptr_w_len (&buf, &ptrval, &length))
1304 remote_fileio_ioerror ();
1310 /* Request commandline using 'm' packet */
1311 cmdline = alloca (length);
1312 retlength = remote_read_bytes (ptrval, (gdb_byte *) cmdline, length);
1313 if (retlength != length)
1315 remote_fileio_ioerror ();
1320 /* Check if system(3) has been explicitely allowed using the
1321 `set remote system-call-allowed 1' command. If length is 0,
1322 indicating a NULL parameter to the system call, return zero to
1323 indicate a shell is not available. Otherwise fail with EPERM. */
1324 if (!remote_fio_system_call_allowed)
1327 remote_fileio_return_success (0);
1329 remote_fileio_reply (-1, FILEIO_EPERM);
1333 remote_fio_no_longjmp = 1;
1334 ret = system (cmdline);
1337 remote_fileio_return_success (ret);
1339 remote_fileio_return_errno (-1);
1341 remote_fileio_return_success (WEXITSTATUS (ret));
1346 void (*func)(char *);
1347 } remote_fio_func_map[] = {
1348 { "open", remote_fileio_func_open },
1349 { "close", remote_fileio_func_close },
1350 { "read", remote_fileio_func_read },
1351 { "write", remote_fileio_func_write },
1352 { "lseek", remote_fileio_func_lseek },
1353 { "rename", remote_fileio_func_rename },
1354 { "unlink", remote_fileio_func_unlink },
1355 { "stat", remote_fileio_func_stat },
1356 { "fstat", remote_fileio_func_fstat },
1357 { "gettimeofday", remote_fileio_func_gettimeofday },
1358 { "isatty", remote_fileio_func_isatty },
1359 { "system", remote_fileio_func_system },
1364 do_remote_fileio_request (struct ui_out *uiout, void *buf_arg)
1366 char *buf = buf_arg;
1370 remote_fileio_sig_set (remote_fileio_ctrl_c_signal_handler);
1372 c = strchr (++buf, ',');
1376 c = strchr (buf, '\0');
1377 for (idx = 0; remote_fio_func_map[idx].name; ++idx)
1378 if (!strcmp (remote_fio_func_map[idx].name, buf))
1380 if (!remote_fio_func_map[idx].name) /* ERROR: No such function. */
1381 return RETURN_ERROR;
1382 remote_fio_func_map[idx].func (c);
1386 /* Close any open descriptors, and reinitialize the file mapping. */
1389 remote_fileio_reset (void)
1393 for (ix = 0; ix != remote_fio_data.fd_map_size; ix++)
1395 int fd = remote_fio_data.fd_map[ix];
1400 if (remote_fio_data.fd_map)
1402 xfree (remote_fio_data.fd_map);
1403 remote_fio_data.fd_map = NULL;
1404 remote_fio_data.fd_map_size = 0;
1409 remote_fileio_request (char *buf)
1413 remote_fileio_sig_init ();
1415 remote_fio_ctrl_c_flag = 0;
1416 remote_fio_no_longjmp = 0;
1418 ex = catch_exceptions (uiout, do_remote_fileio_request, (void *)buf,
1423 remote_fileio_reply (-1, FILEIO_ENOSYS);
1426 remote_fileio_reply (-1, FILEIO_EINTR);
1432 remote_fileio_sig_exit ();
1436 set_system_call_allowed (char *args, int from_tty)
1441 int val = strtoul (args, &arg_end, 10);
1442 if (*args && *arg_end == '\0')
1444 remote_fio_system_call_allowed = !!val;
1448 error (_("Illegal argument for \"set remote system-call-allowed\" command"));
1452 show_system_call_allowed (char *args, int from_tty)
1455 error (_("Garbage after \"show remote system-call-allowed\" command: `%s'"), args);
1456 printf_unfiltered ("Calling host system(3) call from target is %sallowed\n",
1457 remote_fio_system_call_allowed ? "" : "not ");
1461 initialize_remote_fileio (struct cmd_list_element *remote_set_cmdlist,
1462 struct cmd_list_element *remote_show_cmdlist)
1464 sigint_fileio_token =
1465 create_async_signal_handler (async_remote_fileio_interrupt, NULL);
1467 add_cmd ("system-call-allowed", no_class,
1468 set_system_call_allowed,
1469 _("Set if the host system(3) call is allowed for the target."),
1470 &remote_set_cmdlist);
1471 add_cmd ("system-call-allowed", no_class,
1472 show_system_call_allowed,
1473 _("Show if the host system(3) call is allowed for the target."),
1474 &remote_show_cmdlist);