From 41724cbcdef11cb00fcd720c75d399288ea41fd0 Mon Sep 17 00:00:00 2001
From: Allan McRae <allan@archlinux.org>
Date: Sun, 27 Jun 2010 21:13:01 +1000
Subject: Check return value of fwrite when copying files
Check that writing to destination file actually occurs in
_alpm_copyfile. Required adding a new error (PM_ERR_WRITE)
as none of the others appeared appropriate.
Prevents compiler warning when using -D_FORTIFY_SOURCE=2.
Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>
---
lib/libalpm/alpm.h | 1 +
lib/libalpm/util.c | 10 +++++++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h
index 33291325..0c01f214 100644
--- a/lib/libalpm/alpm.h
+++ b/lib/libalpm/alpm.h
@@ -522,6 +522,7 @@ enum _pmerrno_t {
PM_ERR_FILE_CONFLICTS,
/* Misc */
PM_ERR_RETRIEVE,
+ PM_ERR_WRITE,
PM_ERR_INVALID_REGEX,
/* External library errors */
PM_ERR_LIBARCHIVE,
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index b033e0a3..fd5bb628 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -143,7 +143,15 @@ int _alpm_copyfile(const char *src, const char *dest)
/* do the actual file copy */
while((len = fread(buf, 1, CPBUFSIZE, in))) {
- fwrite(buf, 1, len, out);
+ size_t nwritten = 0;
+ nwritten = fwrite(buf, 1, len, out);
+ if((nwritten != len) || ferror(out)) {
+ pm_errno = PM_ERR_WRITE;
+ _alpm_log(PM_LOG_ERROR, _("error writing to file '%s': %s\n"),
+ dest, strerror(errno));
+ ret = -1;
+ goto cleanup;
+ }
}
/* chmod dest to permissions of src, as long as it is not a symlink */
--
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