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/* $Id: catman.c,v 1.14 2017/02/06 19:02:37 schwarze Exp $ */
/*
* Copyright (c) 2017 Michael Stapelberg <stapelberg@debian.org>
* Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#if HAVE_ERR
#include <err.h>
#endif
#include <errno.h>
#include <fcntl.h>
#if HAVE_FTS
#include <fts.h>
#else
#include "compat_fts.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int process_manpage(int, int, const char *);
int process_tree(int, int);
void run_mandocd(int, const char *, const char *)
__attribute__((noreturn));
ssize_t sock_fd_write(int, int, int, int);
void usage(void) __attribute__((noreturn));
void
run_mandocd(int sockfd, const char *outtype, const char* defos)
{
char sockfdstr[10];
if (snprintf(sockfdstr, sizeof(sockfdstr), "%d", sockfd) == -1)
err(1, "snprintf");
if (defos == NULL)
execlp("mandocd", "mandocd", "-T", outtype, sockfdstr, NULL);
else
execlp("mandocd", "mandocd", "-T", outtype,
"-I", defos, sockfdstr, NULL);
err(1, "exec");
}
ssize_t
sock_fd_write(int fd, int fd0, int fd1, int fd2)
{
struct msghdr msg;
struct iovec iov;
union {
struct cmsghdr cmsghdr;
char control[CMSG_SPACE(3 * sizeof(int))];
} cmsgu;
struct cmsghdr *cmsg;
int *walk;
unsigned char dummy[1] = {'\0'};
iov.iov_base = dummy;
iov.iov_len = sizeof(dummy);
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = cmsgu.control;
msg.msg_controllen = sizeof(cmsgu.control);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_len = CMSG_LEN(3 * sizeof(int));
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
walk = (int *)CMSG_DATA(cmsg);
*(walk++) = fd0;
*(walk++) = fd1;
*(walk++) = fd2;
return sendmsg(fd, &msg, 0);
}
int
process_manpage(int srv_fd, int dstdir_fd, const char *path)
{
int in_fd, out_fd;
int irc;
if ((in_fd = open(path, O_RDONLY)) == -1) {
warn("open(%s)", path);
return 0;
}
if ((out_fd = openat(dstdir_fd, path,
O_WRONLY | O_NOFOLLOW | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) == -1) {
warn("openat(%s)", path);
close(in_fd);
return 0;
}
irc = sock_fd_write(srv_fd, in_fd, out_fd, STDERR_FILENO);
close(in_fd);
close(out_fd);
if (irc < 0) {
warn("sendmsg");
return -1;
}
return 0;
}
int
process_tree(int srv_fd, int dstdir_fd)
{
FTS *ftsp;
FTSENT *entry;
const char *argv[2];
const char *path;
argv[0] = ".";
argv[1] = (char *)NULL;
if ((ftsp = fts_open((char * const *)argv,
FTS_PHYSICAL | FTS_NOCHDIR, NULL)) == NULL) {
warn("fts_open");
return -1;
}
while ((entry = fts_read(ftsp)) != NULL) {
path = entry->fts_path + 2;
switch (entry->fts_info) {
case FTS_F:
if (process_manpage(srv_fd, dstdir_fd, path) == -1) {
fts_close(ftsp);
return -1;
}
break;
case FTS_D:
if (*path != '\0' &&
mkdirat(dstdir_fd, path, S_IRWXU | S_IRGRP |
S_IXGRP | S_IROTH | S_IXOTH) == -1 &&
errno != EEXIST) {
warn("mkdirat(%s)", path);
(void)fts_set(ftsp, entry, FTS_SKIP);
}
break;
case FTS_DP:
break;
default:
warnx("%s: not a regular file", path);
break;
}
}
fts_close(ftsp);
return 0;
}
int
main(int argc, char **argv)
{
const char *defos, *outtype;
int srv_fds[2];
int dstdir_fd;
int opt;
pid_t pid;
defos = NULL;
outtype = "ascii";
while ((opt = getopt(argc, argv, "I:T:")) != -1) {
switch (opt) {
case 'I':
defos = optarg;
break;
case 'T':
outtype = optarg;
break;
default:
usage();
}
}
if (argc > 0) {
argc -= optind;
argv += optind;
}
if (argc != 2)
usage();
if (socketpair(AF_LOCAL, SOCK_STREAM, AF_UNSPEC, srv_fds) == -1)
err(1, "socketpair");
pid = fork();
switch (pid) {
case -1:
err(1, "fork");
case 0:
close(srv_fds[0]);
run_mandocd(srv_fds[1], outtype, defos);
default:
break;
}
close(srv_fds[1]);
if ((dstdir_fd = open(argv[1], O_RDONLY | O_DIRECTORY)) == -1)
err(1, "open(%s)", argv[1]);
if (chdir(argv[0]) == -1)
err(1, "chdir(%s)", argv[0]);
return process_tree(srv_fds[0], dstdir_fd) == -1 ? 1 : 0;
}
void
usage(void)
{
fprintf(stderr, "usage: catman [-I os=name] [-T output] "
"srcdir dstdir\n");
exit(1);
}
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