Say when --track is useful in the git-checkout docs.

diff --git a/git-compat-util.h b/git-compat-util.h
index c08688c8f355ccf61a746bbe1ac9a6788bdea7e3..ca0a597a282328bff9e0e29fd3653dbd656489fb 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -21,6 +21,9 @@
 
 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
 
+/* Approximation of the length of the decimal representation of this type. */
+#define decimal_length(x)      ((int)(sizeof(x) * 2.56 + 0.5) + 1)
+
 #if !defined(__APPLE__) && !defined(__FreeBSD__)
 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
@@ -164,6 +167,11 @@ extern size_t gitstrlcpy(char *, const char *, size_t);
 extern uintmax_t gitstrtoumax(const char *, char **, int);
 #endif
 
+#ifdef NO_HSTRERROR
+#define hstrerror githstrerror
+extern const char *githstrerror(int herror);
+#endif
+
 extern void release_pack_memory(size_t, int);
 
 static inline char* xstrdup(const char *str)
@@ -279,6 +287,32 @@ static inline ssize_t xwrite(int fd, const void *buf, size_t len)
        }
 }
 
+static inline int xdup(int fd)
+{
+       int ret = dup(fd);
+       if (ret < 0)
+               die("dup failed: %s", strerror(errno));
+       return ret;
+}
+
+static inline FILE *xfdopen(int fd, const char *mode)
+{
+       FILE *stream = fdopen(fd, mode);
+       if (stream == NULL)
+               die("Out of memory? fdopen failed: %s", strerror(errno));
+       return stream;
+}
+
+static inline int xmkstemp(char *template)
+{
+       int fd;
+
+       fd = mkstemp(template);
+       if (fd < 0)
+               die("Unable to create temporary file: %s", strerror(errno));
+       return fd;
+}
+
 static inline size_t xsize_t(off_t len)
 {
        return (size_t)len;