2 * Copyright (c) 2018, 2022 Stefan Sperling <stsp@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include "got_compat.h"
26 #include "got_error.h"
28 #include "got_lib_poll.h"
30 const struct got_error *
31 got_poll_fd(int fd, int events, int timeout)
39 pfd[0].events = events;
44 if (sigemptyset(&sigset) == -1)
45 return got_error_from_errno("sigemptyset");
46 if (sigaddset(&sigset, SIGWINCH) == -1)
47 return got_error_from_errno("sigaddset");
49 n = ppoll(pfd, 1, timeout == INFTIM ? NULL : &ts, &sigset);
51 return got_error_from_errno("ppoll");
53 if (pfd[0].revents & POLLHUP)
54 return got_error(GOT_ERR_EOF);
55 return got_error(GOT_ERR_TIMEOUT);
57 if (pfd[0].revents & (POLLERR | POLLNVAL))
58 return got_error_from_errno("poll error");
59 if (pfd[0].revents & events)
61 if (pfd[0].revents & POLLHUP)
62 return got_error(GOT_ERR_EOF);
64 return got_error(GOT_ERR_INTERRUPT);
67 const struct got_error *
68 got_poll_read_full(int fd, size_t *len, void *buf, size_t bufsize,
71 const struct got_error *err = NULL;
75 if (minbytes > bufsize)
76 return got_error(GOT_ERR_NO_SPACE);
78 while (have < minbytes) {
79 err = got_poll_fd(fd, POLLIN, INFTIM);
82 r = read(fd, buf + have, bufsize - have);
84 return got_error_from_errno("read");
86 return got_error(GOT_ERR_EOF);
94 const struct got_error *
95 got_poll_write_full(int fd, const void *buf, off_t len)
97 const struct got_error *err = NULL;
101 while (wlen != len) {
103 err = got_poll_fd(fd, POLLOUT, INFTIM);
107 w = write(fd, buf + wlen, len - wlen);
110 return got_error_from_errno("write");