X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Fwin32_replacements.c;h=3082255033b3123cec78f70d965df4cb16e9c39c;hb=9ca5c20853d3be06378fb985aa75c75df280d1e2;hp=5b3017a33af07437d178b1215dadef2c94b52241;hpb=ca0419160ac10e3bb3836a01d53a9960105dc608;p=wimlib

diff --git a/src/win32_replacements.c b/src/win32_replacements.c
index 5b3017a3..30822550 100644
--- a/src/win32_replacements.c
+++ b/src/win32_replacements.c
@@ -31,6 +31,7 @@
 #include <errno.h>
 #include <pthread.h>
 #include <io.h>	/* for _get_osfhandle()  */
+#include <fcntl.h>
 
 #include "wimlib/win32_common.h"
 
@@ -372,4 +373,33 @@ globfree(glob_t *pglob)
 	FREE(pglob->gl_pathv);
 }
 
+/* Replacement for fopen(path, "a") that doesn't prevent other processes from
+ * reading the file  */
+FILE *
+win32_open_logfile(const wchar_t *path)
+{
+	HANDLE h;
+	int fd;
+	FILE *fp;
+
+	h = CreateFile(path, FILE_APPEND_DATA, FILE_SHARE_VALID_FLAGS,
+		       NULL, OPEN_ALWAYS, 0, NULL);
+	if (h == INVALID_HANDLE_VALUE)
+		return NULL;
+
+	fd = _open_osfhandle((intptr_t)h, O_APPEND);
+	if (fd < 0) {
+		CloseHandle(h);
+		return NULL;
+	}
+
+	fp = fdopen(fd, "a");
+	if (!fp) {
+		close(fd);
+		return NULL;
+	}
+
+	return fp;
+}
+
 #endif /* __WIN32__ */