X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=src%2Fmisc.c;h=78844ffcc8f6ed5adca60b9f6cd9fb9a8bab8c74;hb=c2c2df6c939397b9330a675fdcecba4a8d99ea60;hp=55bedd2b2c901669ff4025feadbb2fd338984831;hpb=d659cbaccdc1f3279c49107cf15f15a639738529;p=chaz%2Ftar

diff --git a/src/misc.c b/src/misc.c
index 55bedd2..78844ff 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -23,6 +23,14 @@
 #include <quotearg.h>
 #include <save-cwd.h>
 #include <unlinkdir.h>
+#include <utimens.h>
+
+#if HAVE_STROPTS_H
+# include <stropts.h>
+#endif
+#if HAVE_SYS_FILIO_H
+# include <sys/filio.h>
+#endif
 
 
 /* Handling strings.  */
@@ -239,6 +247,27 @@ code_ns_fraction (int ns, char *p)
 	}
     }
 }
+
+char const *
+code_timespec (struct timespec t, char sbuf[TIMESPEC_STRSIZE_BOUND])
+{
+  time_t s = t.tv_sec;
+  int ns = t.tv_nsec;
+  char *np;
+  bool negative = s < 0;
+
+  if (negative && ns != 0)
+    {
+      s++;
+      ns = BILLION - ns;
+    }
+
+  np = umaxtostr (negative ? - (uintmax_t) s : (uintmax_t) s, sbuf + 1);
+  if (negative)
+    *--np = '-';
+  code_ns_fraction (ns, sbuf + UINTMAX_STRSIZE_BOUND);
+  return np;
+}
 
 /* File handling.  */
 
@@ -469,6 +498,26 @@ deref_stat (bool deref, char const *name, struct stat *buf)
   return deref ? stat (name, buf) : lstat (name, buf);
 }
 
+/* Set FD's (i.e., FILE's) access time to TIMESPEC[0].  If that's not
+   possible to do by itself, set its access and data modification
+   times to TIMESPEC[0] and TIMESPEC[1], respectively.  */
+int
+set_file_atime (int fd, char const *file, struct timespec const timespec[2])
+{
+#ifdef _FIOSATIME
+  if (0 <= fd)
+    {
+      struct timeval timeval;
+      timeval.tv_sec = timespec[0].tv_sec;
+      timeval.tv_usec = timespec[0].tv_nsec / 1000;
+      if (ioctl (fd, _FIOSATIME, &timeval) == 0)
+	return 0;
+    }
+#endif
+
+  return futimens (fd, file, timespec);
+}
+
 /* A description of a working directory.  */
 struct wd
 {