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gzip, gunzip: avoid hanging when opening special files

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This matches the behavior of GNU gzip.
This commit is contained in:
Eric Biggers 2016-10-23 13:54:53 -07:00
parent f100a42c02
commit 3a7658d144
1 changed files with 11 additions and 3 deletions
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14
programs/prog_util.c
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@ -42,11 +42,17 @@
#ifndef O_BINARY
# define O_BINARY 0
#endif
#ifndef O_SEQUENTIAL
# define O_SEQUENTIAL 0
#endif
#ifndef O_NOFOLLOW
# define O_NOFOLLOW 0
#endif
#ifndef O_SEQUENTIAL
# define O_SEQUENTIAL 0
#ifndef O_NONBLOCK
# define O_NONBLOCK 0
#endif
#ifndef O_NOCTTY
# define O_NOCTTY 0
#endif
/* The invocation name of the program (filename component only) */
@ -216,7 +222,7 @@ xopen_for_read(const tchar *path, bool symlink_ok, struct file_stream *strm)
if (strm->name == NULL)
return -1;
strm->fd = topen(path, O_RDONLY | O_BINARY |
strm->fd = topen(path, O_RDONLY | O_BINARY | O_NONBLOCK | O_NOCTTY |
(symlink_ok ? 0 : O_NOFOLLOW) | O_SEQUENTIAL);
if (strm->fd < 0) {
msg_errno("Can't open %"TS" for reading", strm->name);
@ -361,6 +367,8 @@ xread(struct file_stream *strm, void *buf, size_t count)
if (res == 0)
break;
if (res < 0) {
if (errno == EAGAIN || errno == EINTR)
continue;
msg_errno("Error reading from %"TS, strm->name);
return -1;
}