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 <[email protected]> --- lib/libalpm/alpm.h | 1 + lib/libalpm/util.c | 10 +++++++++- 2 files changed, 10 insertions(+), 1 deletions(-) diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h index 3329132..0c01f21 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 383568c..559d62e 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 */ -- 1.7.1
