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* Better error checking.

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This commit is contained in:
Eelco Dolstra 2006-08-31 11:40:39 +00:00
parent f93f7b75be
commit 354d58b3d7
1 changed files with 6 additions and 11 deletions
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17
src/libutil/archive.cc
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@ -79,19 +79,15 @@ static void dumpContents(const Path & path, unsigned int size,
if (fd == -1) throw SysError(format("opening file `%1%'") % path);
unsigned char buf[65536];
unsigned int left = size;
unsigned int total = 0;
ssize_t n;
while ((n = read(fd, buf, sizeof(buf)))) {
checkInterrupt();
if (n == -1) throw SysError("reading file " + path);
total += n;
while (left >= 0) {
size_t n = left > sizeof(buf) ? sizeof(buf) : left;
readFull(fd, buf, n);
left -= n;
sink(buf, n);
}
if (total != size)
throw SysError("file changed while reading it: " + path);
writePadding(size, sink);
}
@ -231,8 +227,7 @@ static void restoreContents(int fd, const Path & path, RestoreSource & source)
unsigned int n = sizeof(buf);
if (n > left) n = left;
source(buf, n);
if (write(fd, buf, n) != (ssize_t) n)
throw SysError("writing file " + path);
writeFull(fd, buf, n);
left -= n;
}