caps: handle EINTR in read()

We don't want to link caps.{c,h} against utils.{c,h} for the sake of our static builds init.lxc.static. This means lxc_write_nointr() will not be available. So handle it EINTR. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

caps: handle EINTR in read()
b608a3d9 · Christian Brauner · c66853b8 · b608a3d9
Unverified Commit b608a3d9 authored Jul 29, 2018 by Christian Brauner
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caps.c src/lxc/caps.c +5 -1

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--- a/src/lxc/caps.c
+++ b/src/lxc/caps.c
@@ -315,7 +315,11 @@ static int _real_caps_last_cap(void)
 		char *ptr;
 		int n;

-		if ((n = read(fd, buf, 31)) >= 0) {
+	again:
+		n = read(fd, buf, 31);
+		if (n < 0 && errno == EINTR) {
+			goto again;
+		} else if (n >= 0) {
 			buf[n] = '\0';
 			errno = 0;