accept high-precision timestamps in lfs.touch

.travis.yml

@@ -1,15 +1,34 @@
-language: c
-
+language: generic
 sudo: false
 
-env:
-  - LUA="lua 5.1"
-  - LUA="lua 5.2"
-  - LUA="lua 5.3"
-  - LUA="luajit 2.1"
+jobs:
+  - os: linux
+    env:
+    - LUA="lua 5.1"
+      LIBFLAG="-shared --coverage"
+  - os: linux
+    env:
+    - LUA="lua 5.2"
+      LIBFLAG="-shared --coverage"
+  - os: linux
+    env:
+    - LUA="lua 5.3"
+      LIBFLAG="-shared --coverage"
+  - os: linux
+    env:
+    - LUA="lua 5.4"
+      LIBFLAG="-shared --coverage"
+  - os: linux
+    env:
+    - LUA="luajit 2.1"
+      LIBFLAG="-shared --coverage"
+  - os: osx
+    env:
+    - LUA="lua 5.1"
+      LIBFLAG="-bundle -undefined dynamic_lookup -all_load --coverage"
 
 before_install:
-  - pip install --user cpp-coveralls hererocks
+  - pip install cpp-coveralls hererocks
   - hererocks env --$LUA --luarocks latest
   - export PATH="$PWD/env/bin:$PATH"
   - luarocks install lua-path 
@@ -19,7 +38,7 @@ before_install:
   - luarocks install luacov-coveralls --server=https://luarocks.org/dev --deps-mode=none
 
 install:
-  - luarocks make CFLAGS="-O2 -fPIC -ftest-coverage -fprofile-arcs" LIBFLAG="-shared --coverage"
+  - luarocks make CFLAGS="-O2 -fPIC -ftest-coverage -fprofile-arcs" LIBFLAG="$LIBFLAG"
 
 script:
   - lua -lluacov tests/test.lua

src/lfs.c

@@ -172,6 +172,15 @@ typedef struct dir_data {
 
 #endif
 
+#if _POSIX_VERSION >= 200809L
+#define UTIME_FUNC(dirp, name, utb)  utimensat(dirp ? dirfd(dirp) : 0, name, utb, 0)
+#define UTIME_STRUCT                 struct timespec
+#else
+#define UTIME_FUNC(dirp, name, utb)  utime(name, utb)
+#define UTIME_STRUCT                 struct utimbuf
+#endif
+
+
 #ifdef _WIN32
 #define lfs_mkdir _mkdir
 #else
@@ -820,17 +829,39 @@ static const char *mode2string(mode_t mode)
 static int file_utime(lua_State * L)
 {
   const char *file = luaL_checkstring(L, 1);
-  struct utimbuf utb, *buf;
+  UTIME_STRUCT utb[2];
+  UTIME_STRUCT *buf;
+#ifndef _WIN32
+  DIR* dirp = NULL;
+#endif
 
   if (lua_gettop(L) == 1)       /* set to current date/time */
     buf = NULL;
   else {
-    utb.actime = (time_t) luaL_optnumber(L, 2, 0);
-    utb.modtime = (time_t) luaL_optinteger(L, 3, utb.actime);
-    buf = &utb;
+#if _POSIX_VERSION >= 200809L
+    lua_Number acctime = luaL_optnumber(L, 2, 0);
+    lua_Number modtime = luaL_optnumber(L, 3, acctime);
+    utb[0].tv_sec = acctime;
+    utb[0].tv_nsec = (acctime - utb[0].tv_sec) * 1000000000;
+    utb[1].tv_sec = modtime;
+    utb[1].tv_nsec = (modtime - utb[1].tv_sec) * 1000000000;
+    if (file[0] != '/') {
+      dirp = opendir(".");
+    }
+#else
+    utb[0].actime = (time_t) luaL_optnumber(L, 2, 0);
+    utb[0].modtime = (time_t) luaL_optnumber(L, 3, utb[0].actime);
+#endif
+    buf = utb;
   }
 
-  return pushresult(L, utime(file, buf), NULL);
+  int res = UTIME_FUNC(dirp, file, buf);
+#ifndef _WIN32
+  if (dirp) {
+    closedir(dirp);
+  }
+#endif
+  return pushresult(L, res, NULL);
 }
 
 
@@ -876,22 +907,37 @@ static void push_st_rdev(lua_State * L, STAT_STRUCT * info)
   lua_pushinteger(L, (lua_Integer) info->st_rdev);
 }
 
+#define push_stat_timespec(field) \
+  lua_pushnumber(L, info->FIELDNAME(field).tv_sec \
+  + info->FIELDNAME(field).tv_nsec / 1000000000.0)
+
+#if _POSIX_VERSION >= 200809L
+#define FIELDNAME(field)           field
+#define push_stat_time(field)      push_stat_timespec(field)
+#elif __APPLE__
+#define FIELDNAME(field)           field ## espec
+#define push_stat_time(field)      push_stat_timespec(field)
+#else
+#define FIELDNAME(field)           field ## e
+#define push_stat_time(field)      lua_pushinteger(L, info->FIELDNAME(field))
+#endif
+
 /* time of last access */
 static void push_st_atime(lua_State * L, STAT_STRUCT * info)
 {
-  lua_pushinteger(L, (lua_Integer) info->st_atime);
+  push_stat_time(st_atim);
 }
 
 /* time of last data modification */
 static void push_st_mtime(lua_State * L, STAT_STRUCT * info)
 {
-  lua_pushinteger(L, (lua_Integer) info->st_mtime);
+  push_stat_time(st_mtim);
 }
 
 /* time of last file status change */
 static void push_st_ctime(lua_State * L, STAT_STRUCT * info)
 {
-  lua_pushinteger(L, (lua_Integer) info->st_ctime);
+  push_stat_time(st_ctim);
 }
 
 /* file size, in bytes */

tests/test.lua

@@ -79,6 +79,19 @@ assert (new_att.modification == testdate, "could not set modification time")
 io.write(".")
 io.flush()
 
+-- High-precision attributes
+local testdate_hi = os.time({ year = 2021, day = 1, month = 23, hour=0}) + 0.5555
+assert (lfs.touch (tmpfile, testdate_hi))
+local new_att_hi = assert (lfs.attributes (tmpfile))
+if new_att_hi.modification ~= testdate_hi then
+    io.write("\n")
+    io.write("warning: no support for high-precision timestamps\n")
+    io.flush()
+end
+
+io.write(".")
+io.flush()
+
 -- Change access and modification time
 local testdate1 = os.time({ year = 2007, day = 10, month = 2, hour=0})
 local testdate2 = os.time({ year = 2007, day = 11, month = 2, hour=0})
@@ -151,8 +164,8 @@ io.flush()
 -- Restore access time to current value
 assert (lfs.touch (tmpfile, attrib.access, attrib.modification))
 new_att = assert (lfs.attributes (tmpfile))
-assert (new_att.access == attrib.access)
-assert (new_att.modification == attrib.modification)
+assert (new_att.access - attrib.access < 1)
+assert (new_att.modification - attrib.modification < 1)
 
 io.write(".")
 io.flush()
@@ -194,7 +207,7 @@ io.write(".")
 io.flush()
 
 -- Stressing directory iterator
-count = 0
+local count = 0
 for i = 1, 4000 do
         for file in lfs.dir (tmp) do
                 count = count + 1