Revert "Remove unused filesystem stat symbols."

This reverts commit 821805a244cacd9869331999cd53407f3323206a.

What's out, is out.

perl #107904 Filesys-Df
perl #108189 Filesys-DfPortable
perl #108191 Filesys-Statvfs
perl #126368 Filesys-DfPortable

3 files changed, 215 insertions, 0 deletions

diff --git a/plan9/config.plan9 b/plan9/config.plan9
index ce7cb0edc2..722e82999e 100644
--- a/plan9/config.plan9
+++ b/plan9/config.plan9
@@ -1478,12 +1478,24 @@
  */
 /*#define HAS_FREXPL		/ **/
 
+/* HAS_STRUCT_FS_DATA:
+ *	This symbol, if defined, indicates that the struct fs_data
+ *	to do statfs() is supported.
+ */
+/*#define HAS_STRUCT_FS_DATA	/ **/
+
 /* HAS_FSEEKO:
  *	This symbol, if defined, indicates that the fseeko routine is
  *	available to fseek beyond 32 bits (useful for ILP32 hosts).
  */
 /*#define HAS_FSEEKO		/ **/
 
+/* HAS_FSTATFS:
+ *	This symbol, if defined, indicates that the fstatfs routine is
+ *	available to stat filesystems by file descriptors.
+ */
+/*#define HAS_FSTATFS		/ **/
+
 /* HAS_FSYNC:
  *	This symbol, if defined, indicates that the fsync routine is
  *	available to write a file's modified data and attributes to
@@ -1526,6 +1538,12 @@
  */
 /*#define HAS_GETESPWNAM		/ **/
 
+/* HAS_GETFSSTAT:
+ *	This symbol, if defined, indicates that the getfsstat routine is
+ *	available to stat filesystems in bulk.
+ */
+/*#define HAS_GETFSSTAT		/ **/
+
 /* HAS_GETGRENT:
  *	This symbol, if defined, indicates that the getgrent routine is
  *	available for sequential access of the group database.
@@ -1645,6 +1663,18 @@
 /*#define HAS_GETLOGIN_R	   / **/
 #define GETLOGIN_R_PROTO 0	   /**/
 
+/* HAS_GETMNT:
+ *	This symbol, if defined, indicates that the getmnt routine is
+ *	available to get filesystem mount info by filename.
+ */
+/*#define HAS_GETMNT		/ **/
+
+/* HAS_GETMNTENT:
+ *	This symbol, if defined, indicates that the getmntent routine is
+ *	available to iterate through mounted file systems to get their info.
+ */
+/*#define HAS_GETMNTENT		/ **/
+
 /* HAS_GETNETBYADDR:
  *	This symbol, if defined, indicates that the getnetbyaddr() routine is
  *	available to look up networks by their IP addresses.
@@ -1832,6 +1862,11 @@
 #if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE)
 #   define _GNU_SOURCE
 #endif
+/* HAS_HASMNTOPT:
+ *	This symbol, if defined, indicates that the hasmntopt routine is
+ *	available to query the mount options of file systems.
+ */
+/*#define HAS_HASMNTOPT		/ **/
 
 /* HAS_HTONL:
  *	This symbol, if defined, indicates that the htonl() routine (and
@@ -2390,6 +2425,29 @@
 /*#define USE_STAT_BLOCKS 	/ **/
 #endif
 
+/* HAS_STRUCT_STATFS_F_FLAGS:
+ *	This symbol, if defined, indicates that the struct statfs
+ *	does have the f_flags member containing the mount flags of
+ *	the filesystem containing the file.
+ *	This kind of struct statfs is coming from <sys/mount.h> (BSD 4.3),
+ *	not from <sys/statfs.h> (SYSV).  Older BSDs (like Ultrix) do not
+ *	have statfs() and struct statfs, they have ustat() and getmnt()
+ *	with struct ustat and struct fs_data.
+ */
+/*#define HAS_STRUCT_STATFS_F_FLAGS		/ **/
+
+/* HAS_STRUCT_STATFS:
+ *	This symbol, if defined, indicates that the struct statfs
+ *	to do statfs() is supported.
+ */
+/*#define HAS_STRUCT_STATFS	/ **/
+
+/* HAS_FSTATVFS:
+ *	This symbol, if defined, indicates that the fstatvfs routine is
+ *	available to stat filesystems by file descriptors.
+ */
+/*#define HAS_FSTATVFS		/ **/
+
 /* USE_STDIO_PTR:
  *	This symbol is defined if the _ptr and _cnt fields (or similar)
  *	of the stdio FILE structure can be used to access the stdio buffer
@@ -2602,6 +2660,12 @@
  */
 /*#define HAS_UNORDERED		/ **/
 
+/* HAS_USTAT:
+ *	This symbol, if defined, indicates that the ustat system call is
+ *	available to query file system statistics by dev_t.
+ */
+/*#define HAS_USTAT		/ **/
+
 /* HAS_VFORK:
  *	This symbol, if defined, indicates that vfork() exists.
  */
@@ -2783,6 +2847,12 @@
  */
 /*#define   I_MACH_CTHREADS	/ **/
 
+/* I_MNTENT:
+ *	This symbol, if defined, indicates that <mntent.h> exists and
+ *	should be included.
+ */
+/*#define	I_MNTENT		/ **/
+
 /* I_NETDB:
  *	This symbol, if defined, indicates that <netdb.h> exists and
  *	should be included.
@@ -2889,6 +2959,23 @@
  */
 /*#define	I_SYSMODE		/ **/
 
+/* I_SYS_MOUNT:
+ *	This symbol, if defined, indicates that <sys/mount.h> exists and
+ *	should be included.
+ */
+/*#define	I_SYS_MOUNT		/ **/
+
+/* I_SYS_STATFS:
+ *	This symbol, if defined, indicates that <sys/statfs.h> exists.
+ */
+/*#define	I_SYS_STATFS		/ **/
+
+/* I_SYS_STATVFS:
+ *	This symbol, if defined, indicates that <sys/statvfs.h> exists and
+ *	should be included.
+ */
+/*#define	I_SYS_STATVFS		/ **/
+
 /* I_SYSUIO:
  *	This symbol, if defined, indicates that <sys/uio.h> exists and
  *	should be included.
@@ -2901,6 +2988,12 @@
  */
 #define	I_SYSUTSNAME		/**/
 
+/* I_SYS_VFS:
+ *	This symbol, if defined, indicates that <sys/vfs.h> exists and
+ *	should be included.
+ */
+/*#define	I_SYS_VFS		/ **/
+
 /* Plan 9: P9 has both <time.h> and <sys/time.h> */
 /* I_TIME:
  *	This symbol, if defined, indicates to the C program that it should
@@ -2926,6 +3019,12 @@
 /*#define I_SYS_TIME_KERNEL		/ **/
 /*#define HAS_TM_TM_ZONE		/ **/
 
+/* I_USTAT:
+ *	This symbol, if defined, indicates that <ustat.h> exists and
+ *	should be included.
+ */
+/*#define	I_USTAT		/ **/
+
 /* PERL_INC_VERSION_LIST:
  *	This variable specifies the list of subdirectories in over
  *	which perl.c:incpush() and lib/lib.pm will automatically
diff --git a/plan9/config_h.sample b/plan9/config_h.sample
index c89ab71453..d88498430c 100644
--- a/plan9/config_h.sample
+++ b/plan9/config_h.sample
@@ -1431,12 +1431,24 @@
  */
 /*#define HAS_FREXPL		/ **/
 
+/* HAS_STRUCT_FS_DATA:
+ *	This symbol, if defined, indicates that the struct fs_data
+ *	to do statfs() is supported.
+ */
+/*#define HAS_STRUCT_FS_DATA	/ **/
+
 /* HAS_FSEEKO:
  *	This symbol, if defined, indicates that the fseeko routine is
  *	available to fseek beyond 32 bits (useful for ILP32 hosts).
  */
 /*#define HAS_FSEEKO		/ **/
 
+/* HAS_FSTATFS:
+ *	This symbol, if defined, indicates that the fstatfs routine is
+ *	available to stat filesystems by file descriptors.
+ */
+/*#define HAS_FSTATFS		/ **/
+
 /* HAS_FSYNC:
  *	This symbol, if defined, indicates that the fsync routine is
  *	available to write a file's modified data and attributes to
@@ -1479,6 +1491,12 @@
  */
 /*#define HAS_GETESPWNAM		/ **/
 
+/* HAS_GETFSSTAT:
+ *	This symbol, if defined, indicates that the getfsstat routine is
+ *	available to stat filesystems in bulk.
+ */
+/*#define HAS_GETFSSTAT		/ **/
+
 /* HAS_GETGRENT:
  *	This symbol, if defined, indicates that the getgrent routine is
  *	available for sequential access of the group database.
@@ -1598,6 +1616,18 @@
 /*#define HAS_GETLOGIN_R	   / **/
 #define GETLOGIN_R_PROTO 0	   /**/
 
+/* HAS_GETMNT:
+ *	This symbol, if defined, indicates that the getmnt routine is
+ *	available to get filesystem mount info by filename.
+ */
+/*#define HAS_GETMNT		/ **/
+
+/* HAS_GETMNTENT:
+ *	This symbol, if defined, indicates that the getmntent routine is
+ *	available to iterate through mounted file systems to get their info.
+ */
+/*#define HAS_GETMNTENT		/ **/
+
 /* HAS_GETNETBYADDR:
  *	This symbol, if defined, indicates that the getnetbyaddr() routine is
  *	available to look up networks by their IP addresses.
@@ -1785,6 +1815,11 @@
 #if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE)
 #   define _GNU_SOURCE
 #endif
+/* HAS_HASMNTOPT:
+ *	This symbol, if defined, indicates that the hasmntopt routine is
+ *	available to query the mount options of file systems.
+ */
+/*#define HAS_HASMNTOPT		/ **/
 
 /* HAS_HTONL:
  *	This symbol, if defined, indicates that the htonl() routine (and
@@ -2322,6 +2357,29 @@
 /*#define USE_STAT_BLOCKS 	/ **/
 #endif
 
+/* HAS_STRUCT_STATFS_F_FLAGS:
+ *	This symbol, if defined, indicates that the struct statfs
+ *	does have the f_flags member containing the mount flags of
+ *	the filesystem containing the file.
+ *	This kind of struct statfs is coming from <sys/mount.h> (BSD 4.3),
+ *	not from <sys/statfs.h> (SYSV).  Older BSDs (like Ultrix) do not
+ *	have statfs() and struct statfs, they have ustat() and getmnt()
+ *	with struct ustat and struct fs_data.
+ */
+/*#define HAS_STRUCT_STATFS_F_FLAGS		/ **/
+
+/* HAS_STRUCT_STATFS:
+ *	This symbol, if defined, indicates that the struct statfs
+ *	to do statfs() is supported.
+ */
+/*#define HAS_STRUCT_STATFS	/ **/
+
+/* HAS_FSTATVFS:
+ *	This symbol, if defined, indicates that the fstatvfs routine is
+ *	available to stat filesystems by file descriptors.
+ */
+/*#define HAS_FSTATVFS		/ **/
+
 /* USE_STDIO_PTR:
  *	This symbol is defined if the _ptr and _cnt fields (or similar)
  *	of the stdio FILE structure can be used to access the stdio buffer
@@ -2534,6 +2592,12 @@
  */
 /*#define HAS_UNORDERED		/ **/
 
+/* HAS_USTAT:
+ *	This symbol, if defined, indicates that the ustat system call is
+ *	available to query file system statistics by dev_t.
+ */
+/*#define HAS_USTAT		/ **/
+
 /* HAS_VFORK:
  *	This symbol, if defined, indicates that vfork() exists.
  */
@@ -2715,6 +2779,12 @@
  */
 /*#define   I_MACH_CTHREADS	/ **/
 
+/* I_MNTENT:
+ *	This symbol, if defined, indicates that <mntent.h> exists and
+ *	should be included.
+ */
+/*#define	I_MNTENT		/ **/
+
 /* I_NETDB:
  *	This symbol, if defined, indicates that <netdb.h> exists and
  *	should be included.
@@ -2821,6 +2891,23 @@
  */
 /*#define	I_SYSMODE		/ **/
 
+/* I_SYS_MOUNT:
+ *	This symbol, if defined, indicates that <sys/mount.h> exists and
+ *	should be included.
+ */
+/*#define	I_SYS_MOUNT		/ **/
+
+/* I_SYS_STATFS:
+ *	This symbol, if defined, indicates that <sys/statfs.h> exists.
+ */
+/*#define	I_SYS_STATFS		/ **/
+
+/* I_SYS_STATVFS:
+ *	This symbol, if defined, indicates that <sys/statvfs.h> exists and
+ *	should be included.
+ */
+/*#define	I_SYS_STATVFS		/ **/
+
 /* I_SYSUIO:
  *	This symbol, if defined, indicates that <sys/uio.h> exists and
  *	should be included.
@@ -2833,6 +2920,12 @@
  */
 #define	I_SYSUTSNAME		/**/
 
+/* I_SYS_VFS:
+ *	This symbol, if defined, indicates that <sys/vfs.h> exists and
+ *	should be included.
+ */
+/*#define	I_SYS_VFS		/ **/
+
 /* I_TIME:
  *	This symbol, if defined, indicates to the C program that it should
  *	include <time.h>.
@@ -2857,6 +2950,12 @@
 /*#define I_SYS_TIME_KERNEL		/ **/
 /*#define HAS_TM_TM_ZONE		/ **/
 
+/* I_USTAT:
+ *	This symbol, if defined, indicates that <ustat.h> exists and
+ *	should be included.
+ */
+/*#define	I_USTAT		/ **/
+
 /* PERL_INC_VERSION_LIST:
  *	This variable specifies the list of subdirectories in over
  *	which perl.c:incpush() and lib/lib.pm will automatically
diff --git a/plan9/config_sh.sample b/plan9/config_sh.sample
index 86802f02dc..4dd6efb049 100644
--- a/plan9/config_sh.sample
+++ b/plan9/config_sh.sample
@@ -222,8 +222,11 @@ d_fpclassl='undef'
 d_fpgetround='undef'
 d_fpos64_t='undef'
 d_frexpl='undef'
+d_fs_data_s='undef'
 d_fseeko='undef'
 d_fsetpos='define'
+d_fstatfs='undef'
+d_fstatvfs='undef'
 d_fsync='define'
 d_ftello='undef'
 d_ftime='undef'
@@ -233,6 +236,7 @@ d_gdbmndbm_h_uses_prototypes='undef'
 d_getaddrinfo='undef'
 d_getcwd='define'
 d_getespwnam='undef'
+d_getfsstat='undef'
 d_getgrent='define'
 d_getgrent_r='undef'
 d_getgrgid_r='undef'
@@ -249,6 +253,8 @@ d_gethostprotos='undef'
 d_getitimer='undef'
 d_getlogin='define'
 d_getlogin_r='undef'
+d_getmnt='undef'
+d_getmntent='undef'
 d_getnameinfo='undef'
 d_getnbyaddr='undef'
 d_getnbyname='undef'
@@ -289,6 +295,7 @@ d_gmtime64='undef'
 d_gmtime_r='undef'
 d_gnulibc='undef'
 d_grpasswd='undef'
+d_hasmntopt='undef'
 d_htonl='define'
 d_hypot='undef'
 d_ilogb='undef'
@@ -514,7 +521,10 @@ d_sresgproto='undef'
 d_sresuproto='undef'
 d_stat='define'
 d_statblks='undef'
+d_statfs_f_flags='undef'
+d_statfs_s='undef'
 d_static_inline='undef'
+d_statvfs='undef'
 d_stdio_cnt_lval='undef'
 d_stdio_ptr_lval='undef'
 d_stdio_ptr_lval_nochange_cnt='undef'
@@ -573,6 +583,7 @@ d_unordered='undef'
 d_unsetenv='undef'
 d_usleep='undef'
 d_usleepproto='undef'
+d_ustat='undef'
 d_vendorarch='undef'
 d_vendorbin='undef'
 d_vendorlib='undef'
@@ -713,6 +724,7 @@ i_malloc='undef'
 i_mallocmalloc='undef'
 i_math='define'
 i_memory='undef'
+i_mntent='undef'
 i_ndbm='undef'
 i_netdb='define'
 i_neterrno='undef'
@@ -743,6 +755,7 @@ i_sysioctl='define'
 i_syslog='undef'
 i_sysmman='undef'
 i_sysmode='undef'
+i_sysmount='undef'
 i_sysndir='undef'
 i_sysparam='define'
 i_syspoll='undef'
@@ -751,6 +764,8 @@ i_syssecrt='undef'
 i_sysselct='define'
 i_syssockio='undef'
 i_sysstat='define'
+i_sysstatfs='undef'
+i_sysstatvfs='undef'
 i_systime='undef'
 i_systimek='undef'
 i_systimes='define'
@@ -758,11 +773,13 @@ i_systypes='define'
 i_sysuio='define'
 i_sysun='define'
 i_sysutsname='define'
+i_sysvfs='undef'
 i_syswait='define'
 i_termio='undef'
 i_termios='define'
 i_time='define'
 i_unistd='define'
+i_ustat='undef'
 i_utime='define'
 i_values='undef'
 i_varargs='undef'