X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Ffailtest%2Ffailtest.c;h=851f2eabf043e4e3f8fa8c53cfe2056431a27220;hb=0a36c4014ffa3fc35d70f69303b6a9d3c697c693;hp=7a6f5220e60cd5ed7d1035922b267751c999a84e;hpb=b0a59bdcb3356eec66015bcdffd9a3fbaef0489a;p=ccan

diff --git a/ccan/failtest/failtest.c b/ccan/failtest/failtest.c
index 7a6f5220..851f2eab 100644
--- a/ccan/failtest/failtest.c
+++ b/ccan/failtest/failtest.c
@@ -12,6 +12,7 @@
 #include <sys/wait.h>
 #include <sys/stat.h>
 #include <sys/time.h>
+#include <signal.h>
 #include <assert.h>
 #include <ccan/read_write_all/read_write_all.h>
 #include <ccan/failtest/failtest_proto.h>
@@ -248,7 +249,8 @@ static struct saved_file *save_file(struct saved_file *next, int fd)
 	s->len = lseek(fd, 0, SEEK_END);
 	lseek(fd, 0, SEEK_SET);
 	s->contents = malloc(s->len);
-	read(fd, s->contents, s->len);
+	if (read(fd, s->contents, s->len) != s->len)
+		err(1, "Failed to save %zu bytes", (size_t)s->len);
 	lseek(fd, s->off, SEEK_SET);
 	return s;
 }
@@ -293,8 +295,11 @@ static void restore_files(struct saved_file *s)
 		struct saved_file *next = s->next;
 
 		lseek(s->fd, 0, SEEK_SET);
-		write(s->fd, s->contents, s->len);
-		ftruncate(s->fd, s->len);
+		if (write(s->fd, s->contents, s->len) != s->len)
+			err(1, "Failed to restore %zu bytes", (size_t)s->len);
+		if (ftruncate(s->fd, s->len) != 0)
+			err(1, "Failed to trim file to length %zu",
+			    (size_t)s->len);
 		free(s->contents);
 		lseek(s->fd, s->off, SEEK_SET);
 		free(s);
@@ -364,7 +369,10 @@ static bool should_fail(struct failtest_call *call)
 		/* + means continue after end, like normal. */
 		if (*failpath == '+')
 			failpath = NULL;
-		else {
+		else if (*failpath == '\0') {
+			/* Continue, but don't inject errors. */
+			return call->fail = false;
+		} else {
 			if (tolower((unsigned char)*failpath)
 			    != info_to_arg[call->type])
 				errx(1, "Failpath expected '%c' got '%c'\n",
@@ -392,8 +400,8 @@ static bool should_fail(struct failtest_call *call)
 			signal(SIGUSR1, SIG_IGN);
 			sprintf(str, "xterm -e gdb /proc/%d/exe %d &",
 				getpid(), getpid());
-			system(str);
-			sleep(5);
+			if (system(str) == 0)
+				sleep(5);
 		}
 	}