remove the impression of unexpectedness when access is denied

diff --git a/pkt-line.c b/pkt-line.c
index 5a04984ea31744528de30269add2754ed2dcd105..eaba15f124b5d8247d39bd0844967cb5a9101ba8 100644 (file)
--- a/pkt-line.c
+++ b/pkt-line.c
@@ -135,13 +135,19 @@ void packet_buf_write(struct strbuf *buf, const char *fmt, ...)
        strbuf_add(buf, buffer, n);
 }
 
-static void safe_read(int fd, void *buffer, unsigned size)
+static int safe_read(int fd, void *buffer, unsigned size, int return_line_fail)
 {
        ssize_t ret = read_in_full(fd, buffer, size);
        if (ret < 0)
                die_errno("read error");
-       else if (ret < size)
+       else if (ret < size) {
+               if (return_line_fail)
+                       return -1;
+
                die("The remote end hung up unexpectedly");
+       }
+
+       return ret;
 }
 
 static int packet_length(const char *linelen)
@@ -169,12 +175,14 @@ static int packet_length(const char *linelen)
        return len;
 }
 
-int packet_read_line(int fd, char *buffer, unsigned size)
+static int packet_read_internal(int fd, char *buffer, unsigned size, int return_line_fail)
 {
-       int len;
+       int len, ret;
        char linelen[4];
 
-       safe_read(fd, linelen, 4);
+       ret = safe_read(fd, linelen, 4, return_line_fail);
+       if (return_line_fail && ret < 0)
+               return ret;
        len = packet_length(linelen);
        if (len < 0)
                die("protocol error: bad line length character: %.4s", linelen);
@@ -185,12 +193,24 @@ int packet_read_line(int fd, char *buffer, unsigned size)
        len -= 4;
        if (len >= size)
                die("protocol error: bad line length %d", len);
-       safe_read(fd, buffer, len);
+       ret = safe_read(fd, buffer, len, return_line_fail);
+       if (return_line_fail && ret < 0)
+               return ret;
        buffer[len] = 0;
        packet_trace(buffer, len, 0);
        return len;
 }
 
+int packet_read(int fd, char *buffer, unsigned size)
+{
+       return packet_read_internal(fd, buffer, size, 1);
+}
+
+int packet_read_line(int fd, char *buffer, unsigned size)
+{
+       return packet_read_internal(fd, buffer, size, 0);
+}
+
 int packet_get_line(struct strbuf *out,
        char **src_buf, size_t *src_len)
 {