[PATCH v2 08/13] libdpkg: check for write errors during decompression

[Jonathan Nieder <jrnieder@gmail.com>]

An unnoticed write error is unlikely to cause major problems,
since the process on the other end still has a chance to notice
the mangled stream.  But it is worth fixing, especially because
the writing end can give a better error message.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
 lib/dpkg/compression.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/lib/dpkg/compression.c b/lib/dpkg/compression.c
index 821c0a4..f901867 100644
--- a/lib/dpkg/compression.c
+++ b/lib/dpkg/compression.c
@@ -44,6 +44,8 @@ fd_fd_filter(int fd_in, int fd_out,
   zFile zfile = zdopen(fd_in, "r"); \
   \
   while ((actualread = zread(zfile, buffer, sizeof(buffer)))) { \
+    int actualwrite; \
+    \
     if (actualread < 0) { \
       int err = 0; \
       const char *errmsg = zerror(zfile, &err); \
@@ -53,7 +55,11 @@ fd_fd_filter(int fd_in, int fd_out,
       ohshit(_("%s: internal " format " error: %s: %s"), \
              desc, "read", errmsg); \
     } \
-    write(fd_out, buffer, actualread); \
+    \
+    actualwrite = write(fd_out, buffer, actualread); \
+    if (actualwrite != actualread) \
+      ohshite(_("%s: internal " format " error: %s"), \
+              desc, "write"); \
   } \
   exit(0); \
 } while(0)
-- 
1.6.5.rc1.199.g596ec