/* $OpenBSD: main.c,v 1.39 2017/04/18 01:45:35 deraadt Exp $ */ /*- * Copyright (c) 1992, 1993, 1994 * The Regents of the University of California. All rights reserved. * Copyright (c) 1992, 1993, 1994, 1995, 1996 * Keith Bostic. All rights reserved. * * See the LICENSE file for redistribution information. */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "common.h" #include "../vi/vi.h" #ifdef DEBUG static void attach(GS *); #endif static int v_obsolete(char *[]); /* * editor -- * Main editor routine. * * PUBLIC: int editor(GS *, int, char *[]); */ int editor(GS *gp, int argc, char *argv[]) { extern int optind; extern char *optarg; const char *p; EVENT ev; FREF *frp; SCR *sp; size_t len; u_int flags; int ch, flagchk, lflag, secure, startup, readonly, rval, silent; char *tag_f, *wsizearg, path[256]; static const char *optstr[3] = { #ifdef DEBUG "c:D:FlRrSsT:t:vw:", "c:D:eFlRrST:t:w:", "c:D:eFlrST:t:w:" #else "c:FlRrSst:vw:", "c:eFlRrSt:w:", "c:eFlrSt:w:" #endif }; if (pledge("stdio rpath wpath cpath fattr flock getpw tty proc exec", NULL) == -1) { perror("pledge"); goto err; } /* Initialize the busy routine, if not defined by the screen. */ if (gp->scr_busy == NULL) gp->scr_busy = vs_busy; /* Initialize the message routine, if not defined by the screen. */ if (gp->scr_msg == NULL) gp->scr_msg = vs_msg; /* Common global structure initialization. */ TAILQ_INIT(&gp->dq); TAILQ_INIT(&gp->hq); LIST_INIT(&gp->ecq); LIST_INSERT_HEAD(&gp->ecq, &gp->excmd, q); gp->noprint = DEFAULT_NOPRINT; /* Structures shared by screens so stored in the GS structure. */ TAILQ_INIT(&gp->frefq); TAILQ_INIT(&gp->dcb_store.textq); LIST_INIT(&gp->cutq); LIST_INIT(&gp->seqq); /* Set initial screen type and mode based on the program name. */ readonly = 0; if (!strcmp(getprogname(), "ex") || !strcmp(getprogname(), "nex")) LF_INIT(SC_EX); else { /* Nview, view are readonly. */ if (!strcmp(getprogname(), "nview") || !strcmp(getprogname(), "view")) readonly = 1; /* Vi is the default. */ LF_INIT(SC_VI); } /* Convert old-style arguments into new-style ones. */ if (v_obsolete(argv)) return (1); /* Parse the arguments. */ flagchk = '\0'; tag_f = wsizearg = NULL; lflag = secure = silent = 0; startup = 1; /* Set the file snapshot flag. */ F_SET(gp, G_SNAPSHOT); pmode = MODE_EX; if (!strcmp(getprogname(), "ex")) pmode = MODE_EX; else if (!strcmp(getprogname(), "vi")) pmode = MODE_VI; else if (!strcmp(getprogname(), "view")) pmode = MODE_VIEW; while ((ch = getopt(argc, argv, optstr[pmode])) != -1) switch (ch) { case 'c': /* Run the command. */ /* * XXX * We should support multiple -c options. */ if (gp->c_option != NULL) { warnx("only one -c command may be specified."); return (1); } gp->c_option = optarg; break; #ifdef DEBUG case 'D': switch (optarg[0]) { case 's': startup = 0; break; case 'w': attach(gp); break; default: warnx("-D requires s or w argument."); return (1); } break; #endif case 'e': /* Ex mode. */ LF_CLR(SC_VI); LF_SET(SC_EX); break; case 'F': /* No snapshot. */ F_CLR(gp, G_SNAPSHOT); break; case 'l': /* Set lisp, showmatch options. */ lflag = 1; break; case 'R': /* Readonly. */ readonly = 1; break; case 'r': /* Recover. */ if (flagchk == 't') { warnx( "only one of -r and -t may be specified."); return (1); } flagchk = 'r'; break; case 'S': secure = 1; break; case 's': silent = 1; break; #ifdef DEBUG case 'T': /* Trace. */ if ((gp->tracefp = fopen(optarg, "w")) == NULL) { warn("%s", optarg); goto err; } (void)fprintf(gp->tracefp, "\n===\ntrace: open %s\n", optarg); break; #endif case 't': /* Tag. */ if (flagchk == 'r') { warnx( "only one of -r and -t may be specified."); return (1); } if (flagchk == 't') { warnx("only one tag file may be specified."); return (1); } flagchk = 't'; tag_f = optarg; break; case 'v': /* Vi mode. */ LF_CLR(SC_EX); LF_SET(SC_VI); break; case 'w': wsizearg = optarg; break; case '?': default: (void)gp->scr_usage(); return (1); } argc -= optind; argv += optind; if (secure) if (pledge("stdio rpath wpath cpath fattr flock getpw tty", NULL) == -1) { perror("pledge"); goto err; } /* * -s option is only meaningful to ex. * * If not reading from a terminal, it's like -s was specified. */ if (silent && !LF_ISSET(SC_EX)) { warnx("-s option is only applicable to ex."); goto err; } if (LF_ISSET(SC_EX) && F_ISSET(gp, G_SCRIPTED)) silent = 1; /* * Build and initialize the first/current screen. This is a bit * tricky. If an error is returned, we may or may not have a * screen structure. If we have a screen structure, put it on a * display queue so that the error messages get displayed. * * !!! * Everything we do until we go interactive is done in ex mode. */ if (screen_init(gp, NULL, &sp)) { if (sp != NULL) TAILQ_INSERT_HEAD(&gp->dq, sp, q); goto err; } F_SET(sp, SC_EX); TAILQ_INSERT_HEAD(&gp->dq, sp, q); if (v_key_init(sp)) /* Special key initialization. */ goto err; { int oargs[5], *oargp = oargs; if (lflag) { /* Command-line options. */ *oargp++ = O_LISP; *oargp++ = O_SHOWMATCH; } if (readonly) *oargp++ = O_READONLY; if (secure) *oargp++ = O_SECURE; *oargp = -1; /* Options initialization. */ if (opts_init(sp, oargs)) goto err; } if (wsizearg != NULL) { ARGS *av[2], a, b; (void)snprintf(path, sizeof(path), "window=%s", wsizearg); a.bp = (CHAR_T *)path; a.len = strlen(path); b.bp = NULL; b.len = 0; av[0] = &a; av[1] = &b; (void)opts_set(sp, av, NULL); } if (silent) { /* Ex batch mode option values. */ O_CLR(sp, O_AUTOPRINT); O_CLR(sp, O_PROMPT); O_CLR(sp, O_VERBOSE); O_CLR(sp, O_WARN); F_SET(sp, SC_EX_SILENT); } sp->rows = O_VAL(sp, O_LINES); /* Make ex formatting work. */ sp->cols = O_VAL(sp, O_COLUMNS); if (!silent && startup) { /* Read EXINIT, exrc files. */ if (ex_exrc(sp)) goto err; if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) { if (screen_end(sp)) goto err; goto done; } } /* * List recovery files if -r specified without file arguments. * Note, options must be initialized and startup information * read before doing this. */ if (flagchk == 'r' && argv[0] == NULL) { if (rcv_list(sp)) goto err; if (screen_end(sp)) goto err; goto done; } /* * !!! * Initialize the default ^D, ^U scrolling value here, after the * user has had every opportunity to set the window option. * * It's historic practice that changing the value of the window * option did not alter the default scrolling value, only giving * a count to ^D/^U did that. */ sp->defscroll = (O_VAL(sp, O_WINDOW) + 1) / 2; /* * If we don't have a command-line option, switch into the right * editor now, so that we position default files correctly, and * so that any tags file file-already-locked messages are in the * vi screen, not the ex screen. * * XXX * If we have a command-line option, the error message can end * up in the wrong place, but I think that the combination is * unlikely. */ if (gp->c_option == NULL) { F_CLR(sp, SC_EX | SC_VI); F_SET(sp, LF_ISSET(SC_EX | SC_VI)); } /* Open a tag file if specified. */ if (tag_f != NULL && ex_tag_first(sp, tag_f)) goto err; /* * Append any remaining arguments as file names. Files are recovery * files if -r specified. If the tag option or ex startup commands * loaded a file, then any file arguments are going to come after it. */ if (*argv != NULL) { if (sp->frp != NULL) { size_t l; /* Cheat -- we know we have an extra argv slot. */ l = strlen(sp->frp->name) + 1; if ((*--argv = malloc(l)) == NULL) { warn(NULL); goto err; } (void)strlcpy(*argv, sp->frp->name, l); } sp->argv = sp->cargv = argv; F_SET(sp, SC_ARGNOFREE); if (flagchk == 'r') F_SET(sp, SC_ARGRECOVER); } /* * If the ex startup commands and or/the tag option haven't already * created a file, create one. If no command-line files were given, * use a temporary file. */ if (sp->frp == NULL) { if (sp->argv == NULL) { if ((frp = file_add(sp, NULL)) == NULL) goto err; } else { if ((frp = file_add(sp, (CHAR_T *)sp->argv[0])) == NULL) goto err; if (F_ISSET(sp, SC_ARGRECOVER)) F_SET(frp, FR_RECOVER); } if (file_init(sp, frp, NULL, 0)) goto err; if (EXCMD_RUNNING(gp)) { (void)ex_cmd(sp); if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) { if (screen_end(sp)) goto err; goto done; } } } /* * Check to see if we need to wait for ex. If SC_SCR_EX is set, ex * was forced to initialize the screen during startup. We'd like to * wait for a single character from the user, but we can't because * we're not in raw mode. We can't switch to raw mode because the * vi initialization will switch to xterm's alternate screen, causing * us to lose the messages we're pausing to make sure the user read. * So, wait for a complete line. */ if (F_ISSET(sp, SC_SCR_EX)) { p = msg_cmsg(sp, CMSG_CONT_R, &len); (void)write(STDOUT_FILENO, p, len); for (;;) { if (v_event_get(sp, &ev, 0, 0)) goto err; if (ev.e_event == E_INTERRUPT || (ev.e_event == E_CHARACTER && (ev.e_value == K_CR || ev.e_value == K_NL))) break; (void)gp->scr_bell(sp); } } /* Switch into the right editor, regardless. */ F_CLR(sp, SC_EX | SC_VI); F_SET(sp, LF_ISSET(SC_EX | SC_VI) | SC_STATUS_CNT); /* * Main edit loop. Vi handles split screens itself, we only return * here when switching editor modes or restarting the screen. */ while (sp != NULL) if (F_ISSET(sp, SC_EX) ? ex(&sp) : vi(&sp)) goto err; done: rval = 0; if (0) err: rval = 1; /* Clean out the global structure. */ v_end(gp); return (rval); } /* * v_end -- * End the program, discarding screens and most of the global area. * * PUBLIC: void v_end(GS *); */ void v_end(GS *gp) { MSGS *mp; SCR *sp; /* If there are any remaining screens, kill them off. */ if (gp->ccl_sp != NULL) { (void)file_end(gp->ccl_sp, NULL, 1); (void)screen_end(gp->ccl_sp); } while ((sp = TAILQ_FIRST(&gp->dq))) (void)screen_end(sp); /* Removes sp from the queue. */ while ((sp = TAILQ_FIRST(&gp->hq))) (void)screen_end(sp); /* Removes sp from the queue. */ #if defined(DEBUG) || defined(PURIFY) { FREF *frp; /* Free FREF's. */ while ((frp = TAILQ_FIRST(&gp->frefq))) { TAILQ_REMOVE(&gp->frefq, frp, q); free(frp->name); free(frp->tname); free(frp); } } /* Free key input queue. */ free(gp->i_event); /* Free cut buffers. */ cut_close(gp); /* Free map sequences. */ seq_close(gp); /* Free default buffer storage. */ (void)text_lfree(&gp->dcb_store.textq); #endif /* Ring the bell if scheduled. */ if (F_ISSET(gp, G_BELLSCHED)) (void)fprintf(stderr, "\07"); /* \a */ /* * Flush any remaining messages. If a message is here, it's almost * certainly the message about the event that killed us (although * it's possible that the user is sourcing a file that exits from the * editor). */ while ((mp = LIST_FIRST(&gp->msgq)) != NULL) { (void)fprintf(stderr, "%s%.*s", mp->mtype == M_ERR ? "ex/vi: " : "", (int)mp->len, mp->buf); LIST_REMOVE(mp, q); #if defined(DEBUG) || defined(PURIFY) free(mp->buf); free(mp); #endif } #if defined(DEBUG) || defined(PURIFY) /* Free any temporary space. */ free(gp->tmp_bp); #if defined(DEBUG) /* Close debugging file descriptor. */ if (gp->tracefp != NULL) (void)fclose(gp->tracefp); #endif #endif } /* * v_obsolete -- * Convert historic arguments into something getopt(3) will like. */ static int v_obsolete(char *argv[]) { size_t len; char *p; /* * Translate old style arguments into something getopt will like. * Make sure it's not text space memory, because ex modifies the * strings. * Change "+" into "-c$". * Change "+" into "-c". * Change "-" into "-s" * The c, T, t and w options take arguments so they can't be * special arguments. * * Stop if we find "--" as an argument, the user may want to edit * a file named "+foo". */ while (*++argv && strcmp(argv[0], "--")) if (argv[0][0] == '+') { if (argv[0][1] == '\0') { argv[0] = strdup("-c$"); if (argv[0] == NULL) goto nomem; } else { p = argv[0]; len = strlen(argv[0]); if ((argv[0] = malloc(len + 2)) == NULL) goto nomem; argv[0][0] = '-'; argv[0][1] = 'c'; (void)strlcpy(argv[0] + 2, p + 1, len); } } else if (argv[0][0] == '-') { if (argv[0][1] == '\0') { argv[0] = strdup("-s"); if (argv[0] == NULL) { nomem: warn(NULL); return (1); } } else if ((argv[0][1] == 'c' || argv[0][1] == 'T' || argv[0][1] == 't' || argv[0][1] == 'w') && argv[0][2] == '\0') ++argv; } return (0); } #ifdef DEBUG static void attach(GS *gp) { int fd; char ch; if ((fd = open(_PATH_TTY, O_RDONLY, 0)) < 0) { warn("%s", _PATH_TTY); return; } (void)printf("process %ld waiting, enter to continue: ", (long)getpid()); (void)fflush(stdout); do { if (read(fd, &ch, 1) != 1) { (void)close(fd); return; } } while (ch != '\n' && ch != '\r'); (void)close(fd); } #endif