master f836452beb0: Update from Gnulib by running admin/merge-gnulib

[Paul Eggert]

branch: master
commit f836452beb0b1e1e11f297f448f452c01a8fa385
Author: Paul Eggert <eggert@cs.ucla.edu>
Commit: Paul Eggert <eggert@cs.ucla.edu>

    Update from Gnulib by running admin/merge-gnulib
---
 lib/file-has-acl.c  | 37 ++++++++++++++++++++++++++-----------
 lib/gettime.c       |  4 ++--
 lib/gettimeofday.c  | 14 ++++++--------
 lib/nanosleep.c     |  3 +--
 lib/pselect.c       |  6 ++++--
 lib/stat-time.h     | 33 +++++++++++----------------------
 lib/timespec.h      |  5 +----
 lib/utimens.c       | 20 ++++++++++----------
 m4/gnulib-common.m4 |  6 +++++-
 9 files changed, 66 insertions(+), 62 deletions(-)

diff --git a/lib/file-has-acl.c b/lib/file-has-acl.c
index 38bc806dc49..4cddc80bd13 100644
--- a/lib/file-has-acl.c
+++ b/lib/file-has-acl.c
@@ -29,7 +29,10 @@
 
 #include "acl-internal.h"
 
+#include "minmax.h"
+
 #if USE_ACL && HAVE_LINUX_XATTR_H && HAVE_LISTXATTR
+# include <stdckdint.h>
 # include <string.h>
 # include <arpa/inet.h>
 # include <sys/xattr.h>
@@ -181,32 +184,44 @@ file_has_acl (char const *name, struct stat const *sb)
              && errno == ERANGE)
         {
           free (heapbuf);
-          listbufsize = listxattr (name, NULL, 0);
-          if (listbufsize < 0)
-            return -1;
-          if (SIZE_MAX < listbufsize)
+          ssize_t newsize = listxattr (name, NULL, 0);
+          if (newsize <= 0)
+            return newsize;
+
+          /* Grow LISTBUFSIZE to at least NEWSIZE.  Grow it by a
+             nontrivial amount too, to defend against denial of
+             service by an adversary that fiddles with ACLs.  */
+          bool overflow = ckd_add (&listbufsize, listbufsize, listbufsize >> 
1);
+          listbufsize = MAX (listbufsize, newsize);
+          if (overflow || SIZE_MAX < listbufsize)
             {
               errno = ENOMEM;
               return -1;
             }
+
           listbuf = heapbuf = malloc (listbufsize);
           if (!listbuf)
             return -1;
         }
 
+      /* In Fedora 39, a file can have both NFSv4 and POSIX ACLs,
+         but if it has an NFSv4 ACL that's the one that matters.
+         In earlier Fedora the two types of ACLs were mutually exclusive.
+         Attempt to work correctly on both kinds of systems.  */
+      bool nfsv4_acl
+        = 0 < listsize && have_xattr (XATTR_NAME_NFSV4_ACL, listbuf, listsize);
       int ret
-        = (listsize < 0 ? -1
-           : (have_xattr (XATTR_NAME_POSIX_ACL_ACCESS, listbuf, listsize)
+        = (listsize <= 0 ? listsize
+           : (nfsv4_acl
+              || have_xattr (XATTR_NAME_POSIX_ACL_ACCESS, listbuf, listsize)
               || (S_ISDIR (sb->st_mode)
                   && have_xattr (XATTR_NAME_POSIX_ACL_DEFAULT,
                                  listbuf, listsize))));
-      bool nfsv4_acl_but_no_posix_acl
-        = ret == 0 && have_xattr (XATTR_NAME_NFSV4_ACL, listbuf, listsize);
       free (heapbuf);
 
-      /* If there is an NFSv4 ACL but no POSIX ACL, follow up with a
-         getxattr syscall to see whether the NFSv4 ACL is nontrivial.  */
-      if (nfsv4_acl_but_no_posix_acl)
+      /* If there is an NFSv4 ACL, follow up with a getxattr syscall
+         to see whether the NFSv4 ACL is nontrivial.  */
+      if (nfsv4_acl)
         {
           ret = getxattr (name, XATTR_NAME_NFSV4_ACL,
                           stackbuf.xattr, sizeof stackbuf.xattr);
diff --git a/lib/gettime.c b/lib/gettime.c
index f86cc4efbff..ec40ff903e1 100644
--- a/lib/gettime.c
+++ b/lib/gettime.c
@@ -35,8 +35,8 @@ gettime (struct timespec *ts)
 #else
   struct timeval tv;
   gettimeofday (&tv, NULL);
-  ts->tv_sec = tv.tv_sec;
-  ts->tv_nsec = tv.tv_usec * 1000;
+  *ts = (struct timespec) { .tv_sec  = tv.tv_sec,
+                            .tv_nsec = tv.tv_usec * 1000 };
 #endif
 }
 
diff --git a/lib/gettimeofday.c b/lib/gettimeofday.c
index d896ec132b9..c71629cbc57 100644
--- a/lib/gettimeofday.c
+++ b/lib/gettimeofday.c
@@ -113,8 +113,10 @@ gettimeofday (struct timeval *restrict tv, void *restrict 
tz)
   ULONGLONG since_1970 =
     since_1601 - (ULONGLONG) 134774 * (ULONGLONG) 86400 * (ULONGLONG) 10000000;
   ULONGLONG microseconds_since_1970 = since_1970 / (ULONGLONG) 10;
-  tv->tv_sec = microseconds_since_1970 / (ULONGLONG) 1000000;
-  tv->tv_usec = microseconds_since_1970 % (ULONGLONG) 1000000;
+  *tv = (struct timeval) {
+    .tv_sec  = microseconds_since_1970 / (ULONGLONG) 1000000,
+    .tv_usec = microseconds_since_1970 % (ULONGLONG) 1000000
+  };
 
   return 0;
 
@@ -127,10 +129,7 @@ gettimeofday (struct timeval *restrict tv, void *restrict 
tz)
   struct timeval otv;
   int result = gettimeofday (&otv, (struct timezone *) tz);
   if (result == 0)
-    {
-      tv->tv_sec = otv.tv_sec;
-      tv->tv_usec = otv.tv_usec;
-    }
+    *tv = otv;
 #  else
   int result = gettimeofday (tv, (struct timezone *) tz);
 #  endif
@@ -143,8 +142,7 @@ gettimeofday (struct timeval *restrict tv, void *restrict 
tz)
 #   error "Only 1-second nominal clock resolution found.  Is that intended?" \
           "If so, compile with the -DOK_TO_USE_1S_CLOCK option."
 #  endif
-  tv->tv_sec = time (NULL);
-  tv->tv_usec = 0;
+  *tv = (struct timeval) { .tv_sec = time (NULL), .tv_usec = 0 };
 
   return 0;
 
diff --git a/lib/nanosleep.c b/lib/nanosleep.c
index 3f295f49b5d..10974df461e 100644
--- a/lib/nanosleep.c
+++ b/lib/nanosleep.c
@@ -60,8 +60,7 @@ nanosleep (const struct timespec *requested_delay,
     static_assert (TYPE_MAXIMUM (time_t) / 24 / 24 / 60 / 60);
     const time_t limit = 24 * 24 * 60 * 60;
     time_t seconds = requested_delay->tv_sec;
-    struct timespec intermediate;
-    intermediate.tv_nsec = requested_delay->tv_nsec;
+    struct timespec intermediate = *requested_delay;
 
     while (limit < seconds)
       {
diff --git a/lib/pselect.c b/lib/pselect.c
index 52d38378783..1b8c19130c2 100644
--- a/lib/pselect.c
+++ b/lib/pselect.c
@@ -59,8 +59,10 @@ pselect (int nfds, fd_set *restrict rfds,
           return -1;
         }
 
-      tv.tv_sec = timeout->tv_sec;
-      tv.tv_usec = (timeout->tv_nsec + 999) / 1000;
+      tv = (struct timeval) {
+        .tv_sec = timeout->tv_sec,
+        .tv_usec = (timeout->tv_nsec + 999) / 1000
+      };
       tvp = &tv;
     }
   else
diff --git a/lib/stat-time.h b/lib/stat-time.h
index 5b2702356ee..af084102dae 100644
--- a/lib/stat-time.h
+++ b/lib/stat-time.h
@@ -122,10 +122,8 @@ get_stat_atime (struct stat const *st)
 #ifdef STAT_TIMESPEC
   return STAT_TIMESPEC (st, st_atim);
 #else
-  struct timespec t;
-  t.tv_sec = st->st_atime;
-  t.tv_nsec = get_stat_atime_ns (st);
-  return t;
+  return (struct timespec) { .tv_sec = st->st_atime,
+                             .tv_nsec = get_stat_atime_ns (st) };
 #endif
 }
 
@@ -136,10 +134,8 @@ get_stat_ctime (struct stat const *st)
 #ifdef STAT_TIMESPEC
   return STAT_TIMESPEC (st, st_ctim);
 #else
-  struct timespec t;
-  t.tv_sec = st->st_ctime;
-  t.tv_nsec = get_stat_ctime_ns (st);
-  return t;
+  return (struct timespec) { .tv_sec = st->st_ctime,
+                             .tv_nsec = get_stat_ctime_ns (st) };
 #endif
 }
 
@@ -150,10 +146,8 @@ get_stat_mtime (struct stat const *st)
 #ifdef STAT_TIMESPEC
   return STAT_TIMESPEC (st, st_mtim);
 #else
-  struct timespec t;
-  t.tv_sec = st->st_mtime;
-  t.tv_nsec = get_stat_mtime_ns (st);
-  return t;
+  return (struct timespec) { .tv_sec = st->st_mtime,
+                             .tv_nsec = get_stat_mtime_ns (st) };
 #endif
 }
 
@@ -168,8 +162,8 @@ get_stat_birthtime (_GL_UNUSED struct stat const *st)
      || defined HAVE_STRUCT_STAT_ST_BIRTHTIM_TV_NSEC)
   t = STAT_TIMESPEC (st, st_birthtim);
 #elif defined HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC
-  t.tv_sec = st->st_birthtime;
-  t.tv_nsec = st->st_birthtimensec;
+  t = (struct timespec) { .tv_sec = st->st_birthtime,
+                          .tv_nsec = st->st_birthtimensec };
 #elif defined _WIN32 && ! defined __CYGWIN__
   /* Native Windows platforms (but not Cygwin) put the "file creation
      time" in st_ctime (!).  See
@@ -177,13 +171,11 @@ get_stat_birthtime (_GL_UNUSED struct stat const *st)
 # if _GL_WINDOWS_STAT_TIMESPEC
   t = st->st_ctim;
 # else
-  t.tv_sec = st->st_ctime;
-  t.tv_nsec = 0;
+  t = (struct timespec) { .tv_sec = st->st_ctime };
 # endif
 #else
   /* Birth time is not supported.  */
-  t.tv_sec = -1;
-  t.tv_nsec = -1;
+  t = (struct timespec) { .tv_sec = -1, .tv_nsec = -1 };
 #endif
 
 #if (defined HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC \
@@ -195,10 +187,7 @@ get_stat_birthtime (_GL_UNUSED struct stat const *st)
      sometimes returns junk in the birth time fields; work around this
      bug if it is detected.  */
   if (! (t.tv_sec && 0 <= t.tv_nsec && t.tv_nsec < 1000000000))
-    {
-      t.tv_sec = -1;
-      t.tv_nsec = -1;
-    }
+    t = (struct timespec) { .tv_sec = -1, .tv_nsec = -1 };
 #endif
 
   return t;
diff --git a/lib/timespec.h b/lib/timespec.h
index 0bdfd76ef78..e94da75defe 100644
--- a/lib/timespec.h
+++ b/lib/timespec.h
@@ -55,10 +55,7 @@ enum { LOG10_TIMESPEC_RESOLUTION = LOG10_TIMESPEC_HZ };
 _GL_TIMESPEC_INLINE struct timespec
 make_timespec (time_t s, long int ns)
 {
-  struct timespec r;
-  r.tv_sec = s;
-  r.tv_nsec = ns;
-  return r;
+  return (struct timespec) { .tv_sec = s, .tv_nsec = ns };
 }
 
 /* Return negative, zero, positive if A < B, A == B, A > B, respectively.  */
diff --git a/lib/utimens.c b/lib/utimens.c
index 4c5377eca0f..faa197e6cb5 100644
--- a/lib/utimens.c
+++ b/lib/utimens.c
@@ -405,10 +405,10 @@ fdutimens (int fd, char const *file, struct timespec 
const timespec[2])
     struct timeval *t;
     if (ts)
       {
-        timeval[0].tv_sec = ts[0].tv_sec;
-        timeval[0].tv_usec = ts[0].tv_nsec / 1000;
-        timeval[1].tv_sec = ts[1].tv_sec;
-        timeval[1].tv_usec = ts[1].tv_nsec / 1000;
+        timeval[0] = (struct timeval) { .tv_sec  = ts[0].tv_sec,
+                                        .tv_usec = ts[0].tv_nsec / 1000 };
+        timeval[1] = (struct timeval) { .tv_sec  = ts[1].tv_sec,
+                                        .tv_usec = ts[1].tv_nsec / 1000 };
         t = timeval;
       }
     else
@@ -502,8 +502,8 @@ fdutimens (int fd, char const *file, struct timespec const 
timespec[2])
       struct utimbuf *ut;
       if (ts)
         {
-          utimbuf.actime = ts[0].tv_sec;
-          utimbuf.modtime = ts[1].tv_sec;
+          utimbuf = (struct utimbuf) { .actime  = ts[0].tv_sec,
+                                       .modtime = ts[1].tv_sec };
           ut = &utimbuf;
         }
       else
@@ -621,10 +621,10 @@ lutimens (char const *file, struct timespec const 
timespec[2])
     int result;
     if (ts)
       {
-        timeval[0].tv_sec = ts[0].tv_sec;
-        timeval[0].tv_usec = ts[0].tv_nsec / 1000;
-        timeval[1].tv_sec = ts[1].tv_sec;
-        timeval[1].tv_usec = ts[1].tv_nsec / 1000;
+        timeval[0] = (struct timeval) { .tv_sec = ts[0].tv_sec,
+                                        .tv_usec = ts[0].tv_nsec / 1000 };
+        timeval[1] = (struct timeval) { .tv_sec = ts[1].tv_sec,
+                                        .tv_usec = ts[1].tv_nsec / 1000 };
         t = timeval;
       }
     else
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index edb8572da25..a2b53d33dca 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 86
+# gnulib-common.m4 serial 87
 dnl Copyright (C) 2007-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -1053,6 +1053,7 @@ AC_DEFUN([gl_CC_GNULIB_WARNINGS],
     dnl -Wno-float-conversion                 >= 4.9          >= 3.9
     dnl -Wno-float-equal                      >= 3            >= 3.9
     dnl -Wimplicit-fallthrough                >= 7            >= 3.9
+    dnl -Wno-missing-field-initializers       >= 4.0, < 11
     dnl -Wno-pedantic                         >= 4.8          >= 3.9
     dnl -Wno-sign-compare                     >= 3            >= 3.9
     dnl -Wno-sign-conversion                  >= 4.3          >= 3.9
@@ -1078,6 +1079,9 @@ AC_DEFUN([gl_CC_GNULIB_WARNINGS],
       #if __GNUC__ >= 7 || (__clang_major__ + (__clang_minor__ >= 9) > 3)
       -Wimplicit-fallthrough
       #endif
+      #if __GNUC__ >= 4 && __GNUC__ < 11 && !defined __clang__
+      -Wno-missing-field-initializers
+      #endif
       #if __GNUC__ + (__GNUC_MINOR__ >= 8) > 4 || (__clang_major__ + 
(__clang_minor__ >= 9) > 3)
       -Wno-pedantic
       #endif