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authorBernhard Reutner-Fischer2014-04-13 16:37:57 +0200
committerDenys Vlasenko2014-04-13 16:37:57 +0200
commitad16741ccd8a8587644d88fb8fdfc41ada1928a6 (patch)
treeaa6461272aa3b71bb2f2f8da4b91a31d8b35eb59 /libbb
parent69b114fb8a2566e14ce125f7736add9dacf6e18d (diff)
downloadbusybox-ad16741ccd8a8587644d88fb8fdfc41ada1928a6.zip
busybox-ad16741ccd8a8587644d88fb8fdfc41ada1928a6.tar.gz
libbb: provide usleep() fallback implementation
POSIX.1-2008 removed the usleep function, provide a fallback implementaion using the recommended nanosleep(). Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
-rw-r--r--libbb/platform.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/libbb/platform.c b/libbb/platform.c
index 1973451..8d90ca4 100644
--- a/libbb/platform.c
+++ b/libbb/platform.c
@@ -17,6 +17,24 @@ char* FAST_FUNC strchrnul(const char *s, int c)
}
#endif
+#ifndef HAVE_USLEEP
+int FAST_FUNC usleep(unsigned usec)
+{
+ struct timespec ts;
+ ts.tv_sec = usec / 1000000u;
+ ts.tv_nsec = (usec % 1000000u) * 1000u;
+ /*
+ * If a signal has non-default handler, nanosleep returns early.
+ * Our version of usleep doesn't return early
+ * if interrupted by such signals:
+ *
+ */
+ while (nanosleep(&ts, &ts) != 0)
+ continue;
+ return 0;
+}
+#endif
+
#ifndef HAVE_VASPRINTF
int FAST_FUNC vasprintf(char **string_ptr, const char *format, va_list p)
{