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Annotation of mandoc/catman.c, Revision 1.14

1.14    ! schwarze    1: /*     $Id: catman.c,v 1.13 2017/02/04 12:03:07 schwarze Exp $ */
1.1       kristaps    2: /*
1.13      schwarze    3:  * Copyright (c) 2017 Michael Stapelberg <stapelberg@debian.org>
                      4:  * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
                      7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
                      9:  *
1.13      schwarze   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.1       kristaps   11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.13      schwarze   12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.1       kristaps   13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17:  */
                     18: #include "config.h"
                     19:
1.13      schwarze   20: #include <sys/types.h>
                     21: #include <sys/socket.h>
1.1       kristaps   22: #include <sys/stat.h>
                     23:
1.13      schwarze   24: #if HAVE_ERR
                     25: #include <err.h>
                     26: #endif
1.14    ! schwarze   27: #include <errno.h>
1.1       kristaps   28: #include <fcntl.h>
1.13      schwarze   29: #if HAVE_FTS
                     30: #include <fts.h>
                     31: #else
                     32: #include "compat_fts.h"
                     33: #endif
1.1       kristaps   34: #include <stdio.h>
                     35: #include <stdlib.h>
                     36: #include <string.h>
                     37: #include <unistd.h>
                     38:
1.13      schwarze   39: int     process_manpage(int, int, const char *);
                     40: int     process_tree(int, int);
1.14    ! schwarze   41: void    run_mandocd(int, const char *, const char *)
        !            42:                __attribute__((noreturn));
1.13      schwarze   43: ssize_t         sock_fd_write(int, int, int, int);
                     44: void    usage(void) __attribute__((noreturn));
                     45:
                     46:
                     47: void
1.14    ! schwarze   48: run_mandocd(int sockfd, const char *outtype, const char* defos)
1.13      schwarze   49: {
                     50:        char     sockfdstr[10];
                     51:
                     52:        if (snprintf(sockfdstr, sizeof(sockfdstr), "%d", sockfd) == -1)
                     53:                err(1, "snprintf");
1.14    ! schwarze   54:        if (defos == NULL)
        !            55:                execlp("mandocd", "mandocd", "-T", outtype, sockfdstr, NULL);
        !            56:        else
        !            57:                execlp("mandocd", "mandocd", "-T", outtype,
        !            58:                    "-I", defos, sockfdstr, NULL);
1.13      schwarze   59:        err(1, "exec");
                     60: }
                     61:
                     62: ssize_t
                     63: sock_fd_write(int fd, int fd0, int fd1, int fd2)
                     64: {
                     65:        struct msghdr    msg;
                     66:        struct iovec     iov;
                     67:        union {
                     68:                struct cmsghdr   cmsghdr;
                     69:                char             control[CMSG_SPACE(3 * sizeof(int))];
                     70:        } cmsgu;
                     71:        struct cmsghdr  *cmsg;
                     72:        int             *walk;
                     73:        unsigned char    dummy[1] = {'\0'};
                     74:
                     75:        iov.iov_base = dummy;
                     76:        iov.iov_len = sizeof(dummy);
                     77:
                     78:        msg.msg_name = NULL;
                     79:        msg.msg_namelen = 0;
                     80:        msg.msg_iov = &iov;
                     81:        msg.msg_iovlen = 1;
                     82:
                     83:        msg.msg_control = cmsgu.control;
                     84:        msg.msg_controllen = sizeof(cmsgu.control);
                     85:
                     86:        cmsg = CMSG_FIRSTHDR(&msg);
                     87:        cmsg->cmsg_len = CMSG_LEN(3 * sizeof(int));
                     88:        cmsg->cmsg_level = SOL_SOCKET;
                     89:        cmsg->cmsg_type = SCM_RIGHTS;
                     90:
                     91:        walk = (int *)CMSG_DATA(cmsg);
                     92:        *(walk++) = fd0;
                     93:        *(walk++) = fd1;
                     94:        *(walk++) = fd2;
1.1       kristaps   95:
1.13      schwarze   96:        return sendmsg(fd, &msg, 0);
                     97: }
1.1       kristaps   98:
                     99: int
1.13      schwarze  100: process_manpage(int srv_fd, int dstdir_fd, const char *path)
1.1       kristaps  101: {
1.13      schwarze  102:        int      in_fd, out_fd;
1.14    ! schwarze  103:        int      irc;
1.1       kristaps  104:
1.13      schwarze  105:        if ((in_fd = open(path, O_RDONLY)) == -1) {
                    106:                warn("open(%s)", path);
1.14    ! schwarze  107:                return 0;
1.13      schwarze  108:        }
1.1       kristaps  109:
1.13      schwarze  110:        if ((out_fd = openat(dstdir_fd, path,
                    111:            O_WRONLY | O_NOFOLLOW | O_CREAT | O_TRUNC,
1.14    ! schwarze  112:            S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) == -1) {
1.13      schwarze  113:                warn("openat(%s)", path);
                    114:                close(in_fd);
1.14    ! schwarze  115:                return 0;
1.1       kristaps  116:        }
                    117:
1.14    ! schwarze  118:        irc = sock_fd_write(srv_fd, in_fd, out_fd, STDERR_FILENO);
        !           119:
        !           120:        close(in_fd);
        !           121:        close(out_fd);
        !           122:
        !           123:        if (irc < 0) {
1.13      schwarze  124:                warn("sendmsg");
                    125:                return -1;
                    126:        }
                    127:        return 0;
1.1       kristaps  128: }
                    129:
1.13      schwarze  130: int
                    131: process_tree(int srv_fd, int dstdir_fd)
1.1       kristaps  132: {
1.13      schwarze  133:        FTS             *ftsp;
                    134:        FTSENT          *entry;
                    135:        const char      *argv[2];
                    136:        const char      *path;
1.1       kristaps  137:
1.13      schwarze  138:        argv[0] = ".";
                    139:        argv[1] = (char *)NULL;
1.1       kristaps  140:
1.13      schwarze  141:        if ((ftsp = fts_open((char * const *)argv,
                    142:            FTS_PHYSICAL | FTS_NOCHDIR, NULL)) == NULL) {
                    143:                warn("fts_open");
                    144:                return -1;
                    145:        }
                    146:
                    147:        while ((entry = fts_read(ftsp)) != NULL) {
                    148:                path = entry->fts_path + 2;
                    149:                switch (entry->fts_info) {
                    150:                case FTS_F:
1.14    ! schwarze  151:                        if (process_manpage(srv_fd, dstdir_fd, path) == -1) {
        !           152:                                fts_close(ftsp);
        !           153:                                return -1;
        !           154:                        }
1.13      schwarze  155:                        break;
                    156:                case FTS_D:
1.14    ! schwarze  157:                        if (*path != '\0' &&
        !           158:                            mkdirat(dstdir_fd, path, S_IRWXU | S_IRGRP |
        !           159:                              S_IXGRP | S_IROTH | S_IXOTH) == -1 &&
        !           160:                            errno != EEXIST) {
        !           161:                                warn("mkdirat(%s)", path);
        !           162:                                (void)fts_set(ftsp, entry, FTS_SKIP);
        !           163:                        }
        !           164:                        break;
1.13      schwarze  165:                case FTS_DP:
                    166:                        break;
                    167:                default:
                    168:                        warnx("%s: not a regular file", path);
                    169:                        break;
1.1       kristaps  170:                }
1.13      schwarze  171:        }
1.1       kristaps  172:
1.13      schwarze  173:        fts_close(ftsp);
                    174:        return 0;
1.1       kristaps  175: }
                    176:
1.13      schwarze  177: int
                    178: main(int argc, char **argv)
1.1       kristaps  179: {
1.14    ! schwarze  180:        const char      *defos, *outtype;
1.13      schwarze  181:        int              srv_fds[2];
                    182:        int              dstdir_fd;
                    183:        int              opt;
1.1       kristaps  184:        pid_t            pid;
                    185:
1.14    ! schwarze  186:        defos = NULL;
1.13      schwarze  187:        outtype = "ascii";
1.14    ! schwarze  188:        while ((opt = getopt(argc, argv, "I:T:")) != -1) {
1.13      schwarze  189:                switch (opt) {
1.14    ! schwarze  190:                case 'I':
        !           191:                        defos = optarg;
        !           192:                        break;
1.13      schwarze  193:                case 'T':
                    194:                        outtype = optarg;
1.1       kristaps  195:                        break;
1.13      schwarze  196:                default:
                    197:                        usage();
1.1       kristaps  198:                }
1.13      schwarze  199:        }
1.1       kristaps  200:
1.13      schwarze  201:        if (argc > 0) {
                    202:                argc -= optind;
                    203:                argv += optind;
1.1       kristaps  204:        }
1.13      schwarze  205:        if (argc != 2)
                    206:                usage();
1.1       kristaps  207:
1.13      schwarze  208:        if (socketpair(AF_LOCAL, SOCK_STREAM, AF_UNSPEC, srv_fds) == -1)
                    209:                err(1, "socketpair");
1.1       kristaps  210:
1.13      schwarze  211:        pid = fork();
                    212:        switch (pid) {
                    213:        case -1:
                    214:                err(1, "fork");
                    215:        case 0:
                    216:                close(srv_fds[0]);
1.14    ! schwarze  217:                run_mandocd(srv_fds[1], outtype, defos);
1.13      schwarze  218:        default:
                    219:                break;
1.1       kristaps  220:        }
1.13      schwarze  221:        close(srv_fds[1]);
1.1       kristaps  222:
1.13      schwarze  223:        if ((dstdir_fd = open(argv[1], O_RDONLY | O_DIRECTORY)) == -1)
                    224:                err(1, "open(%s)", argv[1]);
1.1       kristaps  225:
1.13      schwarze  226:        if (chdir(argv[0]) == -1)
                    227:                err(1, "chdir(%s)", argv[0]);
1.1       kristaps  228:
1.13      schwarze  229:        return process_tree(srv_fds[0], dstdir_fd) == -1 ? 1 : 0;
1.1       kristaps  230: }
                    231:
1.13      schwarze  232: void
                    233: usage(void)
1.1       kristaps  234: {
1.14    ! schwarze  235:        fprintf(stderr, "usage: catman [-I os=name] [-T output] "
        !           236:            "srcdir dstdir\n");
1.13      schwarze  237:        exit(1);
1.1       kristaps  238: }

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