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annotate lib/lstat.c @ 10690:01f3623813da

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Split winsock.c into many smaller files. * lib/close.c: Add _gl_close_fd_maybe_socket from winsock.c. * lib/accept.c: New file, based on winsock.c. * lib/bind.c: New file, based on winsock.c. * lib/connect.c: New file, based on winsock.c. * lib/getpeername.c: New file, based on winsock.c. * lib/getsockname.c: New file, based on winsock.c. * lib/getsockopt.c: New file, based on winsock.c. * lib/ioctl.c: New file, based on winsock.c. * lib/listen.c: New file, based on winsock.c. * lib/recv.c: New file, based on winsock.c. * lib/recvfrom.c: New file, based on winsock.c. * lib/send.c: New file, based on winsock.c. * lib/sendto.c: New file, based on winsock.c. * lib/setsockopt.c: New file, based on winsock.c. * lib/shutdown.c: New file, based on winsock.c. * lib/socket.c: New file, based on winsock.c. * lib/w32sock.h: New file, based on winsock.c. * lib/winsock.c: Remove file. * modules/accept: Likewise. * modules/bind: Likewise. * modules/connect: Likewise. * modules/getpeername: Likewise. * modules/getsockname: Likewise. * modules/getsockopt: Likewise. * modules/ioctl: Likewise. * modules/listen: Likewise. * modules/recv: Likewise. * modules/recvfrom: Likewise. * modules/send: Likewise. * modules/sendto: Likewise. * modules/setsockopt: Likewise. * modules/shutdown: Likewise. * modules/socket: Use socket.c instead of winsock.c. * modules/sys_socket: Remove (unneeded?) dependency on winsock.c. * doc/posix-functions/accept.texi: Doc fix. * doc/posix-functions/bind.texi: Doc fix. * doc/posix-functions/close.texi: Doc fix. * doc/posix-functions/connect.texi: Doc fix. * doc/posix-functions/getpeername.texi: Doc fix. * doc/posix-functions/getsockname.texi: Doc fix. * doc/posix-functions/getsockopt.texi: Doc fix. * doc/posix-functions/ioctl.texi: Doc fix. * doc/posix-functions/listen.texi: Doc fix. * doc/posix-functions/recv.texi: Doc fix. * doc/posix-functions/recvfrom.texi: Doc fix. * doc/posix-functions/send.texi: Doc fix. * doc/posix-functions/sendto.texi: Doc fix. * doc/posix-functions/setsockopt.texi: Doc fix. * doc/posix-functions/shutdown.texi: Doc fix. * doc/posix-functions/socket.texi: Doc fix.
author Simon Josefsson <simon@josefsson.org>
date Tue, 21 Oct 2008 12:17:19 +0200
parents 989b49566cae
children eacd308b94de
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1 /* Work around a bug of lstat on some systems
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2
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3 Copyright (C) 1997-1999, 2000-2006, 2008 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 /* written by Jim Meyering */
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19
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20 #include <config.h>
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21
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22 /* Get the original definition of open. It might be defined as a macro. */
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23 #define __need_system_sys_stat_h
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24 #include <sys/types.h>
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25 #include <sys/stat.h>
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26 #undef __need_system_sys_stat_h
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27
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28 static inline int
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29 orig_lstat (const char *filename, struct stat *buf)
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30 {
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31 return lstat (filename, buf);
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32 }
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33
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34 /* Specification. */
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35 #include <sys/stat.h>
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36
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37 #include <string.h>
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38 #include <errno.h>
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39
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40 /* lstat works differently on Linux and Solaris systems. POSIX (see
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41 `pathname resolution' in the glossary) requires that programs like
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42 `ls' take into consideration the fact that FILE has a trailing slash
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43 when FILE is a symbolic link. On Linux and Solaris 10 systems, the
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44 lstat function already has the desired semantics (in treating
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45 `lstat ("symlink/", sbuf)' just like `lstat ("symlink/.", sbuf)',
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46 but on Solaris 9 and earlier it does not.
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47
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48 If FILE has a trailing slash and specifies a symbolic link,
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49 then use stat() to get more info on the referent of FILE.
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50 If the referent is a non-directory, then set errno to ENOTDIR
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51 and return -1. Otherwise, return stat's result. */
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52
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53 int
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54 rpl_lstat (const char *file, struct stat *sbuf)
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55 {
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56 size_t len;
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57 int lstat_result = orig_lstat (file, sbuf);
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58
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59 if (lstat_result != 0 || !S_ISLNK (sbuf->st_mode))
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60 return lstat_result;
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61
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62 len = strlen (file);
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63 if (len == 0 || file[len - 1] != '/')
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64 return 0;
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65
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66 /* FILE refers to a symbolic link and the name ends with a slash.
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67 Call stat() to get info about the link's referent. */
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68
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69 /* If stat fails, then we do the same. */
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70 if (stat (file, sbuf) != 0)
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71 return -1;
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72
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73 /* If FILE references a directory, return 0. */
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74 if (S_ISDIR (sbuf->st_mode))
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75 return 0;
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76
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77 /* Here, we know stat succeeded and FILE references a non-directory.
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78 But it was specified via a name including a trailing slash.
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79 Fail with errno set to ENOTDIR to indicate the contradiction. */
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80 errno = ENOTDIR;
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81 return -1;
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82 }