X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;ds=sidebyside;f=util-src%2Fpposix.c;h=c8c25ba942c60e972c237b2f2694b08f7e1cfb62;hb=a1f09e2cbcabc2aaa116b512d9b304476858c261;hp=8dfd6c75405be78ff14aee2a5eed11c11d4b5b30;hpb=c7db4b9b2d7a6876a2302d1b6fd5f1d2fff61e08;p=prosody.git

diff --git a/util-src/pposix.c b/util-src/pposix.c
index 8dfd6c75..c8c25ba9 100644
--- a/util-src/pposix.c
+++ b/util-src/pposix.c
@@ -32,8 +32,14 @@
 #include <string.h>
 #include <errno.h>
 #include "lua.h"
+#include "lualib.h"
 #include "lauxlib.h"
 
+#include <fcntl.h>
+#if defined(_GNU_SOURCE)
+#include <linux/falloc.h>
+#endif
+
 #if (defined(_SVID_SOURCE) && !defined(WITHOUT_MALLINFO))
 	#include <malloc.h>
 	#define WITH_MALLINFO
@@ -83,6 +89,10 @@ static int lc_daemonize(lua_State *L)
 	close(0);
 	close(1);
 	close(2);
+	/* Make sure accidental use of FDs 0, 1, 2 don't cause weirdness */
+	open("/dev/null", O_RDONLY);
+	open("/dev/null", O_WRONLY);
+	open("/dev/null", O_WRONLY);
 
 	/* Final fork, use it wisely */
 	if(fork())
@@ -194,12 +204,13 @@ int level_constants[] = 	{
 			};
 int lc_syslog_log(lua_State* L)
 {
-	int level = luaL_checkoption(L, 1, "notice", level_strings);
-	level = level_constants[level];
+	int level = level_constants[luaL_checkoption(L, 1, "notice", level_strings)];
 
-	luaL_checkstring(L, 2);
+	if(lua_gettop(L) == 3)
+		syslog(level, "%s: %s", luaL_checkstring(L, 2), luaL_checkstring(L, 3));
+	else
+		syslog(level, "%s", lua_tostring(L, 2));
 
-	syslog(level, "%s", lua_tostring(L, 2));
 	return 0;
 }
 
@@ -473,6 +484,9 @@ int string2resource(const char *s) {
 	if (!strcmp(s, "MEMLOCK")) return RLIMIT_MEMLOCK;
 	if (!strcmp(s, "NPROC")) return RLIMIT_NPROC;
 	if (!strcmp(s, "RSS")) return RLIMIT_RSS;
+#endif
+#ifdef RLIMIT_NICE
+	if (!strcmp(s, "NICE")) return RLIMIT_NICE;
 #endif
 	return -1;
 }
@@ -622,20 +636,75 @@ int lc_meminfo(lua_State* L)
 {
 	struct mallinfo info = mallinfo();
 	lua_newtable(L);
+	/* This is the total size of memory allocated with sbrk by malloc, in bytes. */
 	lua_pushinteger(L, info.arena);
 	lua_setfield(L, -2, "allocated");
+	/* This is the total size of memory allocated with mmap, in bytes. */
 	lua_pushinteger(L, info.hblkhd);
 	lua_setfield(L, -2, "allocated_mmap");
+	/* This is the total size of memory occupied by chunks handed out by malloc. */
 	lua_pushinteger(L, info.uordblks);
 	lua_setfield(L, -2, "used");
+	/* This is the total size of memory occupied by free (not in use) chunks. */
 	lua_pushinteger(L, info.fordblks);
 	lua_setfield(L, -2, "unused");
+	/* This is the size of the top-most releasable chunk that normally borders the
+	   end of the heap (i.e., the high end of the virtual address space's data segment). */
 	lua_pushinteger(L, info.keepcost);
 	lua_setfield(L, -2, "returnable");
 	return 1;
 }
 #endif
 
+/* File handle extraction blatantly stolen from
+ * https://github.com/rrthomas/luaposix/blob/master/lposix.c#L631
+ * */
+
+#if _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L || defined(_GNU_SOURCE)
+int lc_fallocate(lua_State* L)
+{
+	off_t offset, len;
+	FILE *f = *(FILE**) luaL_checkudata(L, 1, LUA_FILEHANDLE);
+
+	offset = luaL_checkinteger(L, 2);
+	len = luaL_checkinteger(L, 3);
+
+#if defined(_GNU_SOURCE)
+	if(fallocate(fileno(f), FALLOC_FL_KEEP_SIZE, offset, len) == 0)
+	{
+		lua_pushboolean(L, 1);
+		return 1;
+	}
+
+	if(errno != ENOSYS && errno != EOPNOTSUPP)
+	{
+		lua_pushnil(L);
+		lua_pushstring(L, strerror(errno));
+		return 2;
+	}
+#else
+#warning Only using posix_fallocate() fallback.
+#warning Linux fallocate() is strongly recommended if available: recompile with -D_GNU_SOURCE
+#warning Note that posix_fallocate() will still be used on filesystems that dont support fallocate()
+#endif
+
+	if(posix_fallocate(fileno(f), offset, len) == 0)
+	{
+		lua_pushboolean(L, 1);
+		return 1;
+	}
+	else
+	{
+		lua_pushnil(L);
+		lua_pushstring(L, strerror(errno));
+		/* posix_fallocate() can leave a bunch of NULs at the end, so we cut that
+		 * this assumes that offset == length of the file */
+		ftruncate(fileno(f), offset);
+		return 2;
+	}
+}
+#endif
+
 /* Register functions */
 
 int luaopen_util_pposix(lua_State *L)
@@ -673,6 +742,10 @@ int luaopen_util_pposix(lua_State *L)
 		{ "meminfo", lc_meminfo },
 #endif
 
+#if _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L || defined(_GNU_SOURCE)
+		{ "fallocate", lc_fallocate },
+#endif
+
 		{ NULL, NULL }
 	};