]> git.cameronkatri.com Git - mandoc.git/blobdiff - main.c
first batch of -T markdown tests
[mandoc.git] / main.c
diff --git a/main.c b/main.c
index 31dc9994cc17c2b4b690be72e103ec4aa67dd54d..22b825302125624eb733574bb64a3c726d7d053e 100644 (file)
--- a/main.c
+++ b/main.c
@@ -1,7 +1,7 @@
-/*     $Id: main.c,v 1.253 2015/10/22 21:54:23 schwarze Exp $ */
+/*     $Id: main.c,v 1.285 2017/03/03 14:23:23 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2010-2012, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2010-2012, 2014-2017 Ingo Schwarze <schwarze@openbsd.org>
  * Copyright (c) 2010 Joerg Sonnenberger <joerg@netbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
 
 #include <assert.h>
 #include <ctype.h>
+#if HAVE_ERR
 #include <err.h>
+#endif
+#include <errno.h>
 #include <fcntl.h>
 #include <glob.h>
+#if HAVE_SANDBOX_INIT
+#include <sandbox.h>
+#endif
 #include <signal.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 #include <unistd.h>
 
 #include "mandoc_aux.h"
 #include "manconf.h"
 #include "mansearch.h"
 
-#if !defined(__GNUC__) || (__GNUC__ < 2)
-# if !defined(lint)
-#  define __attribute__(x)
-# endif
-#endif /* !defined(__GNUC__) || (__GNUC__ < 2) */
-
 enum   outmode {
        OUTMODE_DEF = 0,
        OUTMODE_FLN,
@@ -66,6 +67,7 @@ enum  outt {
        OUTT_TREE,      /* -Ttree */
        OUTT_MAN,       /* -Tman */
        OUTT_HTML,      /* -Thtml */
+       OUTT_MARKDOWN,  /* -Tmarkdown */
        OUTT_LINT,      /* -Tlint */
        OUTT_PS,        /* -Tps */
        OUTT_PDF        /* -Tpdf */
@@ -80,6 +82,9 @@ struct        curparse {
        struct manoutput *outopts;      /* output options */
 };
 
+
+int                      mandocdb(int, char *[]);
+
 static int               fs_lookup(const struct manpaths *,
                                size_t ipath, const char *,
                                const char *, const char *,
@@ -88,21 +93,17 @@ static      void              fs_search(const struct mansearch *,
                                const struct manpaths *, int, char**,
                                struct manpage **, size_t *);
 static int               koptions(int *, char *);
-#if HAVE_SQLITE3
-int                      mandocdb(int, char**);
-#endif
 static int               moptions(int *, char *);
 static void              mmsg(enum mandocerr, enum mandoclevel,
                                const char *, int, int, const char *);
+static void              outdata_alloc(struct curparse *);
 static void              parse(struct curparse *, int, const char *);
 static void              passthrough(const char *, int, int);
 static pid_t             spawn_pager(struct tag_files *);
 static int               toptions(struct curparse *, char *);
-static void              usage(enum argmode) __attribute__((noreturn));
+static void              usage(enum argmode) __attribute__((__noreturn__));
 static int               woptions(struct curparse *, char *);
 
-extern char             *__progname;
-
 static const int sec_prios[] = {1, 4, 5, 8, 6, 3, 7, 2, 9};
 static char              help_arg[] = "help";
 static char             *help_argv[] = {help_arg, NULL};
@@ -113,37 +114,49 @@ int
 main(int argc, char *argv[])
 {
        struct manconf   conf;
-       struct curparse  curp;
        struct mansearch search;
+       struct curparse  curp;
        struct tag_files *tag_files;
-       char            *auxpaths;
-       char            *defos;
-       unsigned char   *uc;
        struct manpage  *res, *resp;
-       char            *conf_file, *defpaths;
-       size_t           isec, i, sz;
+       const char      *progname, *sec, *thisarg;
+       char            *conf_file, *defpaths, *auxpaths;
+       char            *defos, *oarg;
+       unsigned char   *uc;
+       size_t           i, sz;
        int              prio, best_prio;
-       char             sec;
-       enum mandoclevel rctmp;
        enum outmode     outmode;
        int              fd;
        int              show_usage;
        int              options;
        int              use_pager;
+       int              status, signum;
        int              c;
+       pid_t            pager_pid, tc_pgid, man_pgid, pid;
 
-#if !HAVE_PROGNAME
+#if HAVE_PROGNAME
+       progname = getprogname();
+#else
        if (argc < 1)
-               __progname = mandoc_strdup("mandoc");
-       else if ((__progname = strrchr(argv[0], '/')) == NULL)
-               __progname = argv[0];
+               progname = mandoc_strdup("mandoc");
+       else if ((progname = strrchr(argv[0], '/')) == NULL)
+               progname = argv[0];
        else
-               ++__progname;
+               ++progname;
+       setprogname(progname);
 #endif
 
-#if HAVE_SQLITE3
-       if (strcmp(__progname, BINM_MAKEWHATIS) == 0)
+       if (strncmp(progname, "mandocdb", 8) == 0 ||
+           strcmp(progname, BINM_MAKEWHATIS) == 0)
                return mandocdb(argc, argv);
+
+#if HAVE_PLEDGE
+       if (pledge("stdio rpath tmppath tty proc exec", NULL) == -1)
+               err((int)MANDOCLEVEL_SYSERR, "pledge");
+#endif
+
+#if HAVE_SANDBOX_INIT
+       if (sandbox_init(kSBXProfileNoInternet, SANDBOX_NAMED, NULL) == -1)
+               errx((int)MANDOCLEVEL_SYSERR, "sandbox_init");
 #endif
 
        /* Search options. */
@@ -154,14 +167,15 @@ main(int argc, char *argv[])
 
        memset(&search, 0, sizeof(struct mansearch));
        search.outkey = "Nd";
+       oarg = NULL;
 
-       if (strcmp(__progname, BINM_MAN) == 0)
+       if (strcmp(progname, BINM_MAN) == 0)
                search.argmode = ARG_NAME;
-       else if (strcmp(__progname, BINM_APROPOS) == 0)
+       else if (strcmp(progname, BINM_APROPOS) == 0)
                search.argmode = ARG_EXPR;
-       else if (strcmp(__progname, BINM_WHATIS) == 0)
+       else if (strcmp(progname, BINM_WHATIS) == 0)
                search.argmode = ARG_WORD;
-       else if (strncmp(__progname, "help", 4) == 0)
+       else if (strncmp(progname, "help", 4) == 0)
                search.argmode = ARG_NAME;
        else
                search.argmode = ARG_FILE;
@@ -232,10 +246,7 @@ main(int argc, char *argv[])
                        auxpaths = optarg;
                        break;
                case 'O':
-                       search.outkey = optarg;
-                       while (optarg != NULL)
-                               manconf_output(&conf.output,
-                                   strsep(&optarg, ","));
+                       oarg = optarg;
                        break;
                case 'S':
                        search.arch = optarg;
@@ -280,11 +291,32 @@ main(int argc, char *argv[])
                }
        }
 
+       if (oarg != NULL) {
+               if (outmode == OUTMODE_LST)
+                       search.outkey = oarg;
+               else {
+                       while (oarg != NULL) {
+                               thisarg = oarg;
+                               if (manconf_output(&conf.output,
+                                   strsep(&oarg, ","), 0) == 0)
+                                       continue;
+                               warnx("-O %s: Bad argument", thisarg);
+                               return (int)MANDOCLEVEL_BADARG;
+                       }
+               }
+       }
+
        if (outmode == OUTMODE_FLN ||
            outmode == OUTMODE_LST ||
            !isatty(STDOUT_FILENO))
                use_pager = 0;
 
+#if HAVE_PLEDGE
+       if (!use_pager)
+               if (pledge("stdio rpath", NULL) == -1)
+                       err((int)MANDOCLEVEL_SYSERR, "pledge");
+#endif
+
        /* Parse arguments. */
 
        if (argc > 0) {
@@ -299,7 +331,7 @@ main(int argc, char *argv[])
         */
 
        if (search.argmode == ARG_NAME) {
-               if (*__progname == 'h') {
+               if (*progname == 'h') {
                        if (argc == 0) {
                                argv = help_argv;
                                argc = 1;
@@ -326,9 +358,6 @@ main(int argc, char *argv[])
        /* man(1), whatis(1), apropos(1) */
 
        if (search.argmode != ARG_FILE) {
-               if (argc == 0)
-                       usage(search.argmode);
-
                if (search.argmode == ARG_NAME &&
                    outmode == OUTMODE_ONE)
                        search.firstmatch = 1;
@@ -336,19 +365,9 @@ main(int argc, char *argv[])
                /* Access the mandoc database. */
 
                manconf_parse(&conf, conf_file, defpaths, auxpaths);
-#if HAVE_SQLITE3
-               mansearch_setup(1);
                if ( ! mansearch(&search, &conf.manpath,
                    argc, argv, &res, &sz))
                        usage(search.argmode);
-#else
-               if (search.argmode != ARG_NAME) {
-                       fputs("mandoc: database support not compiled in\n",
-                           stderr);
-                       return (int)MANDOCLEVEL_BADARG;
-               }
-               sz = 0;
-#endif
 
                if (sz == 0) {
                        if (search.argmode == ARG_NAME)
@@ -371,7 +390,7 @@ main(int argc, char *argv[])
 
                if (outmode == OUTMODE_ONE) {
                        argc = 1;
-                       best_prio = 10;
+                       best_prio = 20;
                } else if (outmode == OUTMODE_ALL)
                        argc = (int)sz;
 
@@ -387,11 +406,13 @@ main(int argc, char *argv[])
                                    res[i].output);
                        else if (outmode == OUTMODE_ONE) {
                                /* Search for the best section. */
-                               isec = strcspn(res[i].file, "123456789");
-                               sec = res[i].file[isec];
-                               if ('\0' == sec)
+                               sec = res[i].file;
+                               sec += strcspn(sec, "123456789");
+                               if (sec[0] == '\0')
                                        continue;
-                               prio = sec_prios[sec - '1'];
+                               prio = sec_prios[sec[0] - '1'];
+                               if (sec[1] != '/')
+                                       prio += 10;
                                if (prio >= best_prio)
                                        continue;
                                best_prio = prio;
@@ -411,6 +432,16 @@ main(int argc, char *argv[])
 
        /* mandoc(1) */
 
+#if HAVE_PLEDGE
+       if (use_pager) {
+               if (pledge("stdio rpath tmppath tty proc exec", NULL) == -1)
+                       err((int)MANDOCLEVEL_SYSERR, "pledge");
+       } else {
+               if (pledge("stdio rpath", NULL) == -1)
+                       err((int)MANDOCLEVEL_SYSERR, "pledge");
+       }
+#endif
+
        if (search.argmode == ARG_FILE && ! moptions(&options, auxpaths))
                return (int)MANDOCLEVEL_BADARG;
 
@@ -430,11 +461,7 @@ main(int argc, char *argv[])
        }
 
        while (argc > 0) {
-               rctmp = mparse_open(curp.mp, &fd,
-                   resp != NULL ? resp->file : *argv);
-               if (rc < rctmp)
-                       rc = rctmp;
-
+               fd = mparse_open(curp.mp, resp != NULL ? resp->file : *argv);
                if (fd != -1) {
                        if (use_pager) {
                                tag_files = tag_init();
@@ -443,7 +470,7 @@ main(int argc, char *argv[])
 
                        if (resp == NULL)
                                parse(&curp, fd, *argv);
-                       else if (resp->form & FORM_SRC) {
+                       else if (resp->form == FORM_SRC) {
                                /* For .so only; ignore failure. */
                                chdir(conf.manpath.paths[resp->ipath]);
                                parse(&curp, fd, resp->file);
@@ -451,9 +478,13 @@ main(int argc, char *argv[])
                                passthrough(resp->file, fd,
                                    conf.output.synopsisonly);
 
-                       if (argc > 1 && curp.outtype <= OUTT_UTF8)
-                               ascii_sepline(curp.outdata);
-               }
+                       if (argc > 1 && curp.outtype <= OUTT_UTF8) {
+                               if (curp.outdata == NULL)
+                                       outdata_alloc(&curp);
+                               terminal_sepline(curp.outdata);
+                       }
+               } else if (rc < MANDOCLEVEL_ERROR)
+                       rc = MANDOCLEVEL_ERROR;
 
                if (MANDOCLEVEL_OK != rc && curp.wstop)
                        break;
@@ -490,10 +521,7 @@ main(int argc, char *argv[])
 out:
        if (search.argmode != ARG_FILE) {
                manconf_free(&conf);
-#if HAVE_SQLITE3
                mansearch_free(res, sz);
-               mansearch_setup(0);
-#endif
        }
 
        free(defos);
@@ -506,7 +534,52 @@ out:
        if (tag_files != NULL) {
                fclose(stdout);
                tag_write();
-               waitpid(spawn_pager(tag_files), NULL, 0);
+               man_pgid = getpgid(0);
+               tag_files->tcpgid = man_pgid == getpid() ?
+                   getpgid(getppid()) : man_pgid;
+               pager_pid = 0;
+               signum = SIGSTOP;
+               for (;;) {
+
+                       /* Stop here until moved to the foreground. */
+
+                       tc_pgid = tcgetpgrp(tag_files->ofd);
+                       if (tc_pgid != man_pgid) {
+                               if (tc_pgid == pager_pid) {
+                                       (void)tcsetpgrp(tag_files->ofd,
+                                           man_pgid);
+                                       if (signum == SIGTTIN)
+                                               continue;
+                               } else
+                                       tag_files->tcpgid = tc_pgid;
+                               kill(0, signum);
+                               continue;
+                       }
+
+                       /* Once in the foreground, activate the pager. */
+
+                       if (pager_pid) {
+                               (void)tcsetpgrp(tag_files->ofd, pager_pid);
+                               kill(pager_pid, SIGCONT);
+                       } else
+                               pager_pid = spawn_pager(tag_files);
+
+                       /* Wait for the pager to stop or exit. */
+
+                       while ((pid = waitpid(pager_pid, &status,
+                           WUNTRACED)) == -1 && errno == EINTR)
+                               continue;
+
+                       if (pid == -1) {
+                               warn("wait");
+                               rc = MANDOCLEVEL_SYSERR;
+                               break;
+                       }
+                       if (!WIFSTOPPED(status))
+                               break;
+
+                       signum = WSTOPSIG(status);
+               }
                tag_unlink();
        }
 
@@ -552,7 +625,8 @@ fs_lookup(const struct manpaths *paths, size_t ipath,
        glob_t           globinfo;
        struct manpage  *page;
        char            *file;
-       int              form, globres;
+       int              globres;
+       enum form        form;
 
        form = FORM_SRC;
        mandoc_asprintf(&file, "%s/man%s/%s.%s",
@@ -590,10 +664,8 @@ fs_lookup(const struct manpaths *paths, size_t ipath,
                return 0;
 
 found:
-#if HAVE_SQLITE3
-       warnx("outdated mandoc.db lacks %s(%s) entry, run makewhatis %s\n",
-           name, sec, paths->paths[ipath]);
-#endif
+       warnx("outdated mandoc.db lacks %s(%s) entry, run %s %s",
+           name, sec, BINM_MAKEWHATIS, paths->paths[ipath]);
        *res = mandoc_reallocarray(*res, ++*ressz, sizeof(struct manpage));
        page = *res + (*ressz - 1);
        page->file = file;
@@ -611,7 +683,7 @@ fs_search(const struct mansearch *cfg, const struct manpaths *paths,
        int argc, char **argv, struct manpage **res, size_t *ressz)
 {
        const char *const sections[] =
-           {"1", "8", "6", "2", "3", "3p", "5", "7", "4", "9"};
+           {"1", "8", "6", "2", "3", "5", "7", "4", "9", "3p"};
        const size_t nsec = sizeof(sections)/sizeof(sections[0]);
 
        size_t           ipath, isec, lastsz;
@@ -650,9 +722,11 @@ parse(struct curparse *curp, int fd, const char *file)
        /* Begin by parsing the file itself. */
 
        assert(file);
-       assert(fd >= -1);
+       assert(fd >= 0);
 
        rctmp = mparse_readfd(curp->mp, fd, file);
+       if (fd != STDIN_FILENO)
+               close(fd);
        if (rc < rctmp)
                rc = rctmp;
 
@@ -664,32 +738,8 @@ parse(struct curparse *curp, int fd, const char *file)
        if (rctmp != MANDOCLEVEL_OK && curp->wstop)
                return;
 
-       /* If unset, allocate output dev now (if applicable). */
-
-       if (curp->outdata == NULL) {
-               switch (curp->outtype) {
-               case OUTT_HTML:
-                       curp->outdata = html_alloc(curp->outopts);
-                       break;
-               case OUTT_UTF8:
-                       curp->outdata = utf8_alloc(curp->outopts);
-                       break;
-               case OUTT_LOCALE:
-                       curp->outdata = locale_alloc(curp->outopts);
-                       break;
-               case OUTT_ASCII:
-                       curp->outdata = ascii_alloc(curp->outopts);
-                       break;
-               case OUTT_PDF:
-                       curp->outdata = pdf_alloc(curp->outopts);
-                       break;
-               case OUTT_PS:
-                       curp->outdata = ps_alloc(curp->outopts);
-                       break;
-               default:
-                       break;
-               }
-       }
+       if (curp->outdata == NULL)
+               outdata_alloc(curp);
 
        mparse_result(curp->mp, &man, NULL);
 
@@ -698,7 +748,8 @@ parse(struct curparse *curp, int fd, const char *file)
        if (man == NULL)
                return;
        if (man->macroset == MACROSET_MDOC) {
-               mdoc_validate(man);
+               if (curp->outtype != OUTT_TREE || !curp->outopts->noval)
+                       mdoc_validate(man);
                switch (curp->outtype) {
                case OUTT_HTML:
                        html_mdoc(curp->outdata, man);
@@ -716,12 +767,16 @@ parse(struct curparse *curp, int fd, const char *file)
                case OUTT_PS:
                        terminal_mdoc(curp->outdata, man);
                        break;
+               case OUTT_MARKDOWN:
+                       markdown_mdoc(curp->outdata, man);
+                       break;
                default:
                        break;
                }
        }
        if (man->macroset == MACROSET_MAN) {
-               man_validate(man);
+               if (curp->outtype != OUTT_TREE || !curp->outopts->noval)
+                       man_validate(man);
                switch (curp->outtype) {
                case OUTT_HTML:
                        html_man(curp->outdata, man);
@@ -743,6 +798,34 @@ parse(struct curparse *curp, int fd, const char *file)
                        break;
                }
        }
+       mparse_updaterc(curp->mp, &rc);
+}
+
+static void
+outdata_alloc(struct curparse *curp)
+{
+       switch (curp->outtype) {
+       case OUTT_HTML:
+               curp->outdata = html_alloc(curp->outopts);
+               break;
+       case OUTT_UTF8:
+               curp->outdata = utf8_alloc(curp->outopts);
+               break;
+       case OUTT_LOCALE:
+               curp->outdata = locale_alloc(curp->outopts);
+               break;
+       case OUTT_ASCII:
+               curp->outdata = ascii_alloc(curp->outopts);
+               break;
+       case OUTT_PDF:
+               curp->outdata = pdf_alloc(curp->outopts);
+               break;
+       case OUTT_PS:
+               curp->outdata = ps_alloc(curp->outopts);
+               break;
+       default:
+               break;
+       }
 }
 
 static void
@@ -753,12 +836,18 @@ passthrough(const char *file, int fd, int synopsis_only)
 
        FILE            *stream;
        const char      *syscall;
-       char            *line;
-       size_t           len, off;
-       ssize_t          nw;
+       char            *line, *cp;
+       size_t           linesz;
+       ssize_t          len, written;
        int              print;
 
-       fflush(stdout);
+       line = NULL;
+       linesz = 0;
+
+       if (fflush(stdout) == EOF) {
+               syscall = "fflush";
+               goto fail;
+       }
 
        if ((stream = fdopen(fd, "r")) == NULL) {
                close(fd);
@@ -767,45 +856,45 @@ passthrough(const char *file, int fd, int synopsis_only)
        }
 
        print = 0;
-       while ((line = fgetln(stream, &len)) != NULL) {
+       while ((len = getline(&line, &linesz, stream)) != -1) {
+               cp = line;
                if (synopsis_only) {
                        if (print) {
-                               if ( ! isspace((unsigned char)*line))
+                               if ( ! isspace((unsigned char)*cp))
                                        goto done;
-                               while (len &&
-                                   isspace((unsigned char)*line)) {
-                                       line++;
+                               while (isspace((unsigned char)*cp)) {
+                                       cp++;
                                        len--;
                                }
                        } else {
-                               if ((len == sizeof(synb) &&
-                                    ! strncmp(line, synb, len - 1)) ||
-                                   (len == sizeof(synr) &&
-                                    ! strncmp(line, synr, len - 1)))
+                               if (strcmp(cp, synb) == 0 ||
+                                   strcmp(cp, synr) == 0)
                                        print = 1;
                                continue;
                        }
                }
-               for (off = 0; off < len; off += nw)
-                       if ((nw = write(STDOUT_FILENO, line + off,
-                           len - off)) == -1 || nw == 0) {
-                               fclose(stream);
-                               syscall = "write";
-                               goto fail;
-                       }
+               for (; len > 0; len -= written) {
+                       if ((written = write(STDOUT_FILENO, cp, len)) != -1)
+                               continue;
+                       fclose(stream);
+                       syscall = "write";
+                       goto fail;
+               }
        }
 
        if (ferror(stream)) {
                fclose(stream);
-               syscall = "fgetln";
+               syscall = "getline";
                goto fail;
        }
 
 done:
+       free(line);
        fclose(stream);
        return;
 
 fail:
+       free(line);
        warn("%s: SYSERR: %s", file, syscall);
        if (rc < MANDOCLEVEL_SYSERR)
                rc = MANDOCLEVEL_SYSERR;
@@ -865,6 +954,8 @@ toptions(struct curparse *curp, char *arg)
                curp->outtype = OUTT_MAN;
        else if (0 == strcmp(arg, "html"))
                curp->outtype = OUTT_HTML;
+       else if (0 == strcmp(arg, "markdown"))
+               curp->outtype = OUTT_MARKDOWN;
        else if (0 == strcmp(arg, "utf8"))
                curp->outtype = OUTT_UTF8;
        else if (0 == strcmp(arg, "locale"))
@@ -899,7 +990,7 @@ woptions(struct curparse *curp, char *arg)
 
        while (*arg) {
                o = arg;
-               switch (getsubopt(&arg, UNCONST(toks), &v)) {
+               switch (getsubopt(&arg, (char * const *)toks, &v)) {
                case 0:
                        curp->wstop = 1;
                        break;
@@ -931,7 +1022,8 @@ mmsg(enum mandocerr t, enum mandoclevel lvl,
 {
        const char      *mparse_msg;
 
-       fprintf(stderr, "%s: %s:", __progname, file);
+       fprintf(stderr, "%s: %s:", getprogname(),
+           file == NULL ? "<stdin>" : file);
 
        if (line)
                fprintf(stderr, "%d:%d:", line, col + 1);
@@ -950,6 +1042,7 @@ mmsg(enum mandocerr t, enum mandoclevel lvl,
 static pid_t
 spawn_pager(struct tag_files *tag_files)
 {
+       const struct timespec timeout = { 0, 100000000 };  /* 0.1s */
 #define MAX_PAGER_ARGS 16
        char            *argv[MAX_PAGER_ARGS];
        const char      *pager;
@@ -983,11 +1076,11 @@ spawn_pager(struct tag_files *tag_files)
                        break;
        }
 
-       /* For more(1) and less(1), use the tag file. */
+       /* For less(1), use the tag file. */
 
        if ((cmdlen = strlen(argv[0])) >= 4) {
                cp = argv[0] + cmdlen - 4;
-               if (strcmp(cp, "less") == 0 || strcmp(cp, "more") == 0) {
+               if (strcmp(cp, "less") == 0) {
                        argv[argc++] = mandoc_strdup("-T");
                        argv[argc++] = tag_files->tfn;
                }
@@ -1001,6 +1094,13 @@ spawn_pager(struct tag_files *tag_files)
        case 0:
                break;
        default:
+               (void)setpgid(pager_pid, 0);
+               (void)tcsetpgrp(tag_files->ofd, pager_pid);
+#if HAVE_PLEDGE
+               if (pledge("stdio rpath tmppath tty proc", NULL) == -1)
+                       err((int)MANDOCLEVEL_SYSERR, "pledge");
+#endif
+               tag_files->pager_pid = pager_pid;
                return pager_pid;
        }
 
@@ -1010,6 +1110,12 @@ spawn_pager(struct tag_files *tag_files)
                err((int)MANDOCLEVEL_SYSERR, "pager stdout");
        close(tag_files->ofd);
        close(tag_files->tfd);
+
+       /* Do not start the pager before controlling the terminal. */
+
+       while (tcgetpgrp(STDOUT_FILENO) != getpid())
+               nanosleep(&timeout, NULL);
+
        execvp(argv[0], argv);
        err((int)MANDOCLEVEL_SYSERR, "exec %s", argv[0]);
 }