failtest: capture pread/pwrite

[ccan] / ccan / failtest / failtest.c

diff --git a/ccan/failtest/failtest.c b/ccan/failtest/failtest.c
index 1118466ebc5d963bb78c8a218e73689a37c164bc..a9e1aa49887e0b97b4a4be7c89aeb5c8271e9d24 100644 (file)
--- a/ccan/failtest/failtest.c
+++ b/ccan/failtest/failtest.c
@@ -466,14 +466,15 @@ int failtest_pipe(int pipefd[2], const char *file, unsigned line)
        return p->u.pipe.ret;
 }
 
-ssize_t failtest_read(int fd, void *buf, size_t count,
-                     const char *file, unsigned line)
+ssize_t failtest_pread(int fd, void *buf, size_t count, off_t off,
+                      const char *file, unsigned line)
 {
        struct failtest_call *p;
        struct read_call call;
        call.fd = fd;
        call.buf = buf;
        call.count = count;
+       call.off = off;
        p = add_history(FAILTEST_READ, file, line, &call);
 
        /* This is going to change seek offset, so save it. */
@@ -485,7 +486,7 @@ ssize_t failtest_read(int fd, void *buf, size_t count,
                p->u.read.ret = -1;
                p->error = EIO;
        } else {
-               p->u.read.ret = read(fd, buf, count);
+               p->u.read.ret = pread(fd, buf, count, off);
        }
        errno = p->error;
        return p->u.read.ret;
@@ -497,8 +498,8 @@ static struct write_info *new_write(void)
        return &writes[writes_num++];
 }
 
-ssize_t failtest_write(int fd, const void *buf, size_t count,
-                      const char *file, unsigned line)
+ssize_t failtest_pwrite(int fd, const void *buf, size_t count, off_t off,
+                       const char *file, unsigned line)
 {
        struct failtest_call *p;
        struct write_call call;
@@ -507,6 +508,7 @@ ssize_t failtest_write(int fd, const void *buf, size_t count,
        call.fd = fd;
        call.buf = buf;
        call.count = count;
+       call.off = off;
        p = add_history(FAILTEST_WRITE, file, line, &call);
 
        offset = lseek(fd, 0, SEEK_CUR);
@@ -570,12 +572,26 @@ ssize_t failtest_write(int fd, const void *buf, size_t count,
                                return p->u.write.ret;
                        }
                }
-               p->u.write.ret = write(fd, buf, count);
+               p->u.write.ret = pwrite(fd, buf, count, off);
        }
        errno = p->error;
        return p->u.write.ret;
 }
 
+ssize_t failtest_read(int fd, void *buf, size_t count,
+                     const char *file, unsigned line)
+{
+       return failtest_pread(fd, buf, count, lseek(fd, 0, SEEK_CUR),
+                             file, line);
+}
+
+ssize_t failtest_write(int fd, const void *buf, size_t count,
+                      const char *file, unsigned line)
+{
+       return failtest_pwrite(fd, buf, count, lseek(fd, 0, SEEK_CUR),
+                              file, line);
+}
+
 static struct lock_info *WARN_UNUSED_RESULT
 add_lock(struct lock_info *locks, int fd, off_t start, off_t end, int type)
 {