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1# serial 30
2# How to list mounted file systems.
3
4# Copyright (C) 1998-2004, 2006, 2009-2013 Free Software Foundation, Inc.
5#
6# This file is free software; the Free Software Foundation
7# gives unlimited permission to copy and/or distribute it,
8# with or without modifications, as long as this notice is preserved.
9
10dnl From Jim Meyering.
11dnl
12dnl This is not pretty. I've just taken the autoconf code and wrapped
13dnl it in an AC_DEFUN and made some other fixes.
14dnl
15
16# Replace Autoconf's AC_FUNC_GETMNTENT to work around a bug in Autoconf
17# through Autoconf 2.59. We can remove this once we assume Autoconf 2.60
18# or later.
19AC_DEFUN([AC_FUNC_GETMNTENT],
20[# getmntent is in the standard C library on UNICOS, in -lsun on Irix 4,
21# -lseq on Dynix/PTX, -lgen on Unixware.
22AC_SEARCH_LIBS([getmntent], [sun seq gen])
23AC_CHECK_FUNCS([getmntent])
24])
25
26# gl_LIST_MOUNTED_FILE_SYSTEMS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
27AC_DEFUN([gl_LIST_MOUNTED_FILE_SYSTEMS],
28 [
29AC_CHECK_FUNCS([listmntent getmntinfo])
30AC_CHECK_HEADERS_ONCE([sys/param.h sys/statvfs.h])
31
32# We must include grp.h before ucred.h on OSF V4.0, since ucred.h uses
33# NGROUPS (as the array dimension for a struct member) without a definition.
34AC_CHECK_HEADERS([sys/ucred.h], [], [], [#include <grp.h>])
35
36AC_CHECK_HEADERS([sys/mount.h], [], [],
37 [AC_INCLUDES_DEFAULT
38 [#if HAVE_SYS_PARAM_H
39 #include <sys/param.h>
40 #endif]])
41
42AC_CHECK_HEADERS([mntent.h sys/fs_types.h])
43 getfsstat_includes="\
44$ac_includes_default
45#if HAVE_SYS_PARAM_H
46# include <sys/param.h> /* needed by powerpc-apple-darwin1.3.7 */
47#endif
48#if HAVE_SYS_UCRED_H
49# include <grp.h> /* needed for definition of NGROUPS */
50# include <sys/ucred.h> /* needed by powerpc-apple-darwin1.3.7 */
51#endif
52#if HAVE_SYS_MOUNT_H
53# include <sys/mount.h>
54#endif
55#if HAVE_SYS_FS_TYPES_H
56# include <sys/fs_types.h> /* needed by powerpc-apple-darwin1.3.7 */
57#endif
58"
59AC_CHECK_MEMBERS([struct fsstat.f_fstypename],,,[$getfsstat_includes])
60
61# Determine how to get the list of mounted file systems.
62ac_list_mounted_fs=
63
64# If the getmntent function is available but not in the standard library,
65# make sure LIBS contains the appropriate -l option.
66AC_FUNC_GETMNTENT
67
68# This test must precede the ones for getmntent because Unicos-9 is
69# reported to have the getmntent function, but its support is incompatible
70# with other getmntent implementations.
71
72# NOTE: Normally, I wouldn't use a check for system type as I've done for
73# 'CRAY' below since that goes against the whole autoconf philosophy. But
74# I think there is too great a chance that some non-Cray system has a
75# function named listmntent to risk the false positive.
76
77if test -z "$ac_list_mounted_fs"; then
78 # Cray UNICOS 9
79 AC_MSG_CHECKING([for listmntent of Cray/Unicos-9])
80 AC_CACHE_VAL([fu_cv_sys_mounted_cray_listmntent],
81 [fu_cv_sys_mounted_cray_listmntent=no
82 AC_EGREP_CPP([yes],
83 [#ifdef _CRAY
84yes
85#endif
86 ], [test $ac_cv_func_listmntent = yes \
87 && fu_cv_sys_mounted_cray_listmntent=yes]
88 )
89 ]
90 )
91 AC_MSG_RESULT([$fu_cv_sys_mounted_cray_listmntent])
92 if test $fu_cv_sys_mounted_cray_listmntent = yes; then
93 ac_list_mounted_fs=found
94 AC_DEFINE([MOUNTED_LISTMNTENT], [1],
95 [Define if there is a function named listmntent that can be used to
96 list all mounted file systems. (UNICOS)])
97 fi
98fi
99
100if test -z "$ac_list_mounted_fs"; then
101 # AIX.
102 AC_MSG_CHECKING([for mntctl function and struct vmount])
103 AC_CACHE_VAL([fu_cv_sys_mounted_vmount],
104 [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <fshelp.h>]])],
105 [fu_cv_sys_mounted_vmount=yes],
106 [fu_cv_sys_mounted_vmount=no])])
107 AC_MSG_RESULT([$fu_cv_sys_mounted_vmount])
108 if test $fu_cv_sys_mounted_vmount = yes; then
109 ac_list_mounted_fs=found
110 AC_DEFINE([MOUNTED_VMOUNT], [1],
111 [Define if there is a function named mntctl that can be used to read
112 the list of mounted file systems, and there is a system header file
113 that declares 'struct vmount'. (AIX)])
114 fi
115fi
116
117if test $ac_cv_func_getmntent = yes; then
118
119 # This system has the getmntent function.
120 # Determine whether it's the one-argument variant or the two-argument one.
121
122 if test -z "$ac_list_mounted_fs"; then
123 # 4.3BSD, SunOS, HP-UX, Dynix, Irix
124 AC_MSG_CHECKING([for one-argument getmntent function])
125 AC_CACHE_VAL([fu_cv_sys_mounted_getmntent1],
126 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
127/* SunOS 4.1.x /usr/include/mntent.h needs this for FILE */
128#include <stdio.h>
129
130#include <mntent.h>
131#if !defined MOUNTED
132# if defined _PATH_MOUNTED /* GNU libc */
133# define MOUNTED _PATH_MOUNTED
134# endif
135# if defined MNT_MNTTAB /* HP-UX. */
136# define MOUNTED MNT_MNTTAB
137# endif
138# if defined MNTTABNAME /* Dynix. */
139# define MOUNTED MNTTABNAME
140# endif
141#endif
142]],
143 [[ struct mntent *mnt = 0; char *table = MOUNTED;
144 if (sizeof mnt && sizeof table) return 0;]])],
145 [fu_cv_sys_mounted_getmntent1=yes],
146 [fu_cv_sys_mounted_getmntent1=no])])
147 AC_MSG_RESULT([$fu_cv_sys_mounted_getmntent1])
148 if test $fu_cv_sys_mounted_getmntent1 = yes; then
149 ac_list_mounted_fs=found
150 AC_DEFINE([MOUNTED_GETMNTENT1], [1],
151 [Define if there is a function named getmntent for reading the list
152 of mounted file systems, and that function takes a single argument.
153 (4.3BSD, SunOS, HP-UX, Dynix, Irix)])
154 fi
155 fi
156
157 if test -z "$ac_list_mounted_fs"; then
158 # SVR4
159 AC_MSG_CHECKING([for two-argument getmntent function])
160 AC_CACHE_VAL([fu_cv_sys_mounted_getmntent2],
161 [AC_EGREP_HEADER([getmntent], [sys/mnttab.h],
162 fu_cv_sys_mounted_getmntent2=yes,
163 fu_cv_sys_mounted_getmntent2=no)])
164 AC_MSG_RESULT([$fu_cv_sys_mounted_getmntent2])
165 if test $fu_cv_sys_mounted_getmntent2 = yes; then
166 ac_list_mounted_fs=found
167 AC_DEFINE([MOUNTED_GETMNTENT2], [1],
168 [Define if there is a function named getmntent for reading the list of
169 mounted file systems, and that function takes two arguments. (SVR4)])
170 AC_CHECK_FUNCS([hasmntopt])
171 fi
172 fi
173
174fi
175
176if test -z "$ac_list_mounted_fs"; then
177 # DEC Alpha running OSF/1, and Apple Darwin 1.3.
178 # powerpc-apple-darwin1.3.7 needs sys/param.h sys/ucred.h sys/fs_types.h
179
180 AC_MSG_CHECKING([for getfsstat function])
181 AC_CACHE_VAL([fu_cv_sys_mounted_getfsstat],
182 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
183#include <sys/types.h>
184#if HAVE_STRUCT_FSSTAT_F_FSTYPENAME
185# define FS_TYPE(Ent) ((Ent).f_fstypename)
186#else
187# define FS_TYPE(Ent) mnt_names[(Ent).f_type]
188#endif
189$getfsstat_includes]]
190,
191 [[struct statfs *stats;
192 int numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT);
193 char *t = FS_TYPE (*stats); ]])],
194 [fu_cv_sys_mounted_getfsstat=yes],
195 [fu_cv_sys_mounted_getfsstat=no])])
196 AC_MSG_RESULT([$fu_cv_sys_mounted_getfsstat])
197 if test $fu_cv_sys_mounted_getfsstat = yes; then
198 ac_list_mounted_fs=found
199 AC_DEFINE([MOUNTED_GETFSSTAT], [1],
200 [Define if there is a function named getfsstat for reading the
201 list of mounted file systems. (DEC Alpha running OSF/1)])
202 fi
203fi
204
205if test -z "$ac_list_mounted_fs"; then
206 # SVR3
207 AC_MSG_CHECKING([for FIXME existence of three headers])
208 AC_CACHE_VAL([fu_cv_sys_mounted_fread_fstyp],
209 [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
210#include <sys/statfs.h>
211#include <sys/fstyp.h>
212#include <mnttab.h>]])],
213 [fu_cv_sys_mounted_fread_fstyp=yes],
214 [fu_cv_sys_mounted_fread_fstyp=no])])
215 AC_MSG_RESULT([$fu_cv_sys_mounted_fread_fstyp])
216 if test $fu_cv_sys_mounted_fread_fstyp = yes; then
217 ac_list_mounted_fs=found
218 AC_DEFINE([MOUNTED_FREAD_FSTYP], [1],
219 [Define if (like SVR2) there is no specific function for reading the
220 list of mounted file systems, and your system has these header files:
221 <sys/fstyp.h> and <sys/statfs.h>. (SVR3)])
222 fi
223fi
224
225if test -z "$ac_list_mounted_fs"; then
226 # 4.4BSD and DEC OSF/1.
227 AC_MSG_CHECKING([for getmntinfo function])
228 AC_CACHE_VAL([fu_cv_sys_mounted_getmntinfo],
229 [
230 test "$ac_cv_func_getmntinfo" = yes \
231 && fu_cv_sys_mounted_getmntinfo=yes \
232 || fu_cv_sys_mounted_getmntinfo=no
233 ])
234 AC_MSG_RESULT([$fu_cv_sys_mounted_getmntinfo])
235 if test $fu_cv_sys_mounted_getmntinfo = yes; then
236 AC_MSG_CHECKING([whether getmntinfo returns statvfs structures])
237 AC_CACHE_VAL([fu_cv_sys_mounted_getmntinfo2],
238 [
239 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
240#if HAVE_SYS_PARAM_H
241# include <sys/param.h>
242#endif
243#include <sys/types.h>
244#if HAVE_SYS_MOUNT_H
245# include <sys/mount.h>
246#endif
247#if HAVE_SYS_STATVFS_H
248# include <sys/statvfs.h>
249#endif
250extern
251#ifdef __cplusplus
252"C"
253#endif
254int getmntinfo (struct statfs **, int);
255 ]], [])],
256 [fu_cv_sys_mounted_getmntinfo2=no],
257 [fu_cv_sys_mounted_getmntinfo2=yes])
258 ])
259 AC_MSG_RESULT([$fu_cv_sys_mounted_getmntinfo2])
260 if test $fu_cv_sys_mounted_getmntinfo2 = no; then
261 ac_list_mounted_fs=found
262 AC_DEFINE([MOUNTED_GETMNTINFO], [1],
263 [Define if there is a function named getmntinfo for reading the
264 list of mounted file systems and it returns an array of
265 'struct statfs'. (4.4BSD, Darwin)])
266 else
267 ac_list_mounted_fs=found
268 AC_DEFINE([MOUNTED_GETMNTINFO2], [1],
269 [Define if there is a function named getmntinfo for reading the
270 list of mounted file systems and it returns an array of
271 'struct statvfs'. (NetBSD 3.0)])
272 fi
273 fi
274fi
275
276if test -z "$ac_list_mounted_fs"; then
277 # Ultrix
278 AC_MSG_CHECKING([for getmnt function])
279 AC_CACHE_VAL([fu_cv_sys_mounted_getmnt],
280 [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
281#include <sys/fs_types.h>
282#include <sys/mount.h>]])],
283 [fu_cv_sys_mounted_getmnt=yes],
284 [fu_cv_sys_mounted_getmnt=no])])
285 AC_MSG_RESULT([$fu_cv_sys_mounted_getmnt])
286 if test $fu_cv_sys_mounted_getmnt = yes; then
287 ac_list_mounted_fs=found
288 AC_DEFINE([MOUNTED_GETMNT], [1],
289 [Define if there is a function named getmnt for reading the list of
290 mounted file systems. (Ultrix)])
291 fi
292fi
293
294if test -z "$ac_list_mounted_fs"; then
295 # BeOS
296 AC_CHECK_FUNCS([next_dev fs_stat_dev])
297 AC_CHECK_HEADERS([fs_info.h])
298 AC_MSG_CHECKING([for BEOS mounted file system support functions])
299 if test $ac_cv_header_fs_info_h = yes \
300 && test $ac_cv_func_next_dev = yes \
301 && test $ac_cv_func_fs_stat_dev = yes; then
302 fu_result=yes
303 else
304 fu_result=no
305 fi
306 AC_MSG_RESULT([$fu_result])
307 if test $fu_result = yes; then
308 ac_list_mounted_fs=found
309 AC_DEFINE([MOUNTED_FS_STAT_DEV], [1],
310 [Define if there are functions named next_dev and fs_stat_dev for
311 reading the list of mounted file systems. (BeOS)])
312 fi
313fi
314
315if test -z "$ac_list_mounted_fs"; then
316 # SVR2
317 AC_MSG_CHECKING([whether it is possible to resort to fread on /etc/mnttab])
318 AC_CACHE_VAL([fu_cv_sys_mounted_fread],
319 [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <mnttab.h>]])],
320 [fu_cv_sys_mounted_fread=yes],
321 [fu_cv_sys_mounted_fread=no])])
322 AC_MSG_RESULT([$fu_cv_sys_mounted_fread])
323 if test $fu_cv_sys_mounted_fread = yes; then
324 ac_list_mounted_fs=found
325 AC_DEFINE([MOUNTED_FREAD], [1],
326 [Define if there is no specific function for reading the list of
327 mounted file systems. fread will be used to read /etc/mnttab.
328 (SVR2) ])
329 fi
330fi
331
332if test -z "$ac_list_mounted_fs"; then
333 # Interix / BSD alike statvfs
334 # the code is really interix specific, so make sure, we're on it.
335 case "$host" in
336 *-interix*)
337 AC_CHECK_FUNCS([statvfs])
338 if test $ac_cv_func_statvfs = yes; then
339 ac_list_mounted_fs=found
340 AC_DEFINE([MOUNTED_INTERIX_STATVFS], [1],
341 [Define if we are on interix, and ought to use statvfs plus
342 some special knowledge on where mounted file systems can be
343 found. (Interix)])
344 fi
345 ;;
346 esac
347fi
348
349if test -z "$ac_list_mounted_fs"; then
350 AC_MSG_ERROR([could not determine how to read list of mounted file systems])
351 # FIXME -- no need to abort building the whole package
352 # Can't build mountlist.c or anything that needs its functions
353fi
354
355AS_IF([test $ac_list_mounted_fs = found], [$1], [$2])
356
357 ])