119304Speter/*- 219304Speter * Copyright (c) 1992, 1993, 1994 319304Speter * The Regents of the University of California. All rights reserved. 419304Speter * Copyright (c) 1992, 1993, 1994, 1995, 1996 519304Speter * Keith Bostic. All rights reserved. 619304Speter * 719304Speter * See the LICENSE file for redistribution information. 819304Speter */ 919304Speter 1019304Speter#include "config.h" 1119304Speter 1219304Speter#ifndef lint 13254225Speterstatic const char sccsid[] = "$Id: ex_read.c,v 10.44 2001/06/25 15:19:19 skimo Exp $"; 1419304Speter#endif /* not lint */ 1519304Speter 1619304Speter#include <sys/types.h> 1719304Speter#include <sys/queue.h> 1819304Speter#include <sys/stat.h> 1919304Speter 2019304Speter#include <bitstring.h> 2119304Speter#include <ctype.h> 2219304Speter#include <errno.h> 2319304Speter#include <limits.h> 2419304Speter#include <stdio.h> 2519304Speter#include <stdlib.h> 2619304Speter#include <string.h> 2719304Speter 2819304Speter#include "../common/common.h" 2919304Speter#include "../vi/vi.h" 3019304Speter 3119304Speter/* 3219304Speter * ex_read -- :read [file] 3319304Speter * :read [!cmd] 3419304Speter * Read from a file or utility. 3519304Speter * 3619304Speter * !!! 3719304Speter * Historical vi wouldn't undo a filter read, for no apparent reason. 3819304Speter * 3919304Speter * PUBLIC: int ex_read __P((SCR *, EXCMD *)); 4019304Speter */ 4119304Speterint 42254225Speterex_read(SCR *sp, EXCMD *cmdp) 4319304Speter{ 4419304Speter enum { R_ARG, R_EXPANDARG, R_FILTER } which; 4519304Speter struct stat sb; 46254225Speter CHAR_T *arg = NULL; 47254225Speter char *name = NULL; 48254225Speter size_t nlen; 4919304Speter EX_PRIVATE *exp; 5019304Speter FILE *fp; 5119304Speter FREF *frp; 5219304Speter GS *gp; 5319304Speter MARK rm; 5419304Speter recno_t nlines; 55254225Speter size_t arglen = 0; 5619304Speter int argc, rval; 5719304Speter char *p; 5819304Speter 5919304Speter gp = sp->gp; 6019304Speter 6119304Speter /* 6219304Speter * 0 args: read the current pathname. 6319304Speter * 1 args: check for "read !arg". 6419304Speter */ 6519304Speter switch (cmdp->argc) { 6619304Speter case 0: 6719304Speter which = R_ARG; 6819304Speter break; 6919304Speter case 1: 7019304Speter arg = cmdp->argv[0]->bp; 7119304Speter arglen = cmdp->argv[0]->len; 7219304Speter if (*arg == '!') { 7319304Speter ++arg; 7419304Speter --arglen; 7519304Speter which = R_FILTER; 7619304Speter 7719304Speter /* Secure means no shell access. */ 7819304Speter if (O_ISSET(sp, O_SECURE)) { 79254225Speter ex_wemsg(sp, cmdp->cmd->name, EXM_SECURE_F); 8019304Speter return (1); 8119304Speter } 8219304Speter } else 8319304Speter which = R_EXPANDARG; 8419304Speter break; 8519304Speter default: 8619304Speter abort(); 8719304Speter /* NOTREACHED */ 8819304Speter } 8919304Speter 9019304Speter /* Load a temporary file if no file being edited. */ 9119304Speter if (sp->ep == NULL) { 9219304Speter if ((frp = file_add(sp, NULL)) == NULL) 9319304Speter return (1); 9419304Speter if (file_init(sp, frp, NULL, 0)) 9519304Speter return (1); 9619304Speter } 9719304Speter 9819304Speter switch (which) { 9919304Speter case R_FILTER: 10019304Speter /* 10119304Speter * File name and bang expand the user's argument. If 10219304Speter * we don't get an additional argument, it's illegal. 10319304Speter */ 10419304Speter argc = cmdp->argc; 10519304Speter if (argv_exp1(sp, cmdp, arg, arglen, 1)) 10619304Speter return (1); 10719304Speter if (argc == cmdp->argc) { 10819304Speter ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE); 10919304Speter return (1); 11019304Speter } 11119304Speter argc = cmdp->argc - 1; 11219304Speter 11319304Speter /* Set the last bang command. */ 11419304Speter exp = EXP(sp); 11519304Speter if (exp->lastbcomm != NULL) 11619304Speter free(exp->lastbcomm); 11719304Speter if ((exp->lastbcomm = 118254225Speter v_wstrdup(sp, cmdp->argv[argc]->bp, 119254225Speter cmdp->argv[argc]->len)) == NULL) { 12019304Speter msgq(sp, M_SYSERR, NULL); 12119304Speter return (1); 12219304Speter } 12319304Speter 12419304Speter /* 12519304Speter * Vi redisplayed the user's argument if it changed, ex 12619304Speter * always displayed a !, plus the user's argument if it 12719304Speter * changed. 12819304Speter */ 12919304Speter if (F_ISSET(sp, SC_VI)) { 13019304Speter if (F_ISSET(cmdp, E_MODIFY)) 13119304Speter (void)vs_update(sp, "!", cmdp->argv[argc]->bp); 13219304Speter } else { 13319304Speter if (F_ISSET(cmdp, E_MODIFY)) 13419304Speter (void)ex_printf(sp, 135254225Speter "!"WS"\n", cmdp->argv[argc]->bp); 13619304Speter else 13719304Speter (void)ex_puts(sp, "!\n"); 13819304Speter (void)ex_fflush(sp); 13919304Speter } 14019304Speter 14119304Speter /* 14219304Speter * Historically, filter reads as the first ex command didn't 14319304Speter * wait for the user. If SC_SCR_EXWROTE not already set, set 14419304Speter * the don't-wait flag. 14519304Speter */ 14619304Speter if (!F_ISSET(sp, SC_SCR_EXWROTE)) 14719304Speter F_SET(sp, SC_EX_WAIT_NO); 14819304Speter 14919304Speter /* 15019304Speter * Switch into ex canonical mode. The reason to restore the 15119304Speter * original terminal modes for read filters is so that users 15219304Speter * can do things like ":r! cat /dev/tty". 15319304Speter * 15419304Speter * !!! 15519304Speter * We do not output an extra <newline>, so that we don't touch 15619304Speter * the screen on a normal read. 15719304Speter */ 15819304Speter if (F_ISSET(sp, SC_VI)) { 15919304Speter if (gp->scr_screen(sp, SC_EX)) { 160254225Speter ex_wemsg(sp, cmdp->cmd->name, EXM_NOCANON_F); 16119304Speter return (1); 16219304Speter } 16319304Speter /* 16419304Speter * !!! 16519304Speter * Historically, the read command doesn't switch to 16619304Speter * the alternate X11 xterm screen, if doing a filter 16719304Speter * read -- don't set SA_ALTERNATE. 16819304Speter */ 16919304Speter F_SET(sp, SC_SCR_EX | SC_SCR_EXWROTE); 17019304Speter } 17119304Speter 17219304Speter if (ex_filter(sp, cmdp, &cmdp->addr1, 17319304Speter NULL, &rm, cmdp->argv[argc]->bp, FILTER_READ)) 17419304Speter return (1); 17519304Speter 17619304Speter /* The filter version of read set the autoprint flag. */ 17719304Speter F_SET(cmdp, E_AUTOPRINT); 17819304Speter 17919304Speter /* 18019304Speter * If in vi mode, move to the first nonblank. Might have 18119304Speter * switched into ex mode, so saved the original SC_VI value. 18219304Speter */ 18319304Speter sp->lno = rm.lno; 18419304Speter if (F_ISSET(sp, SC_VI)) { 18519304Speter sp->cno = 0; 18619304Speter (void)nonblank(sp, sp->lno, &sp->cno); 18719304Speter } 18819304Speter return (0); 18919304Speter case R_ARG: 19019304Speter name = sp->frp->name; 19119304Speter break; 19219304Speter case R_EXPANDARG: 19319304Speter if (argv_exp2(sp, cmdp, arg, arglen)) 19419304Speter return (1); 19519304Speter /* 19619304Speter * 0 args: impossible. 19719304Speter * 1 args: impossible (I hope). 19819304Speter * 2 args: read it. 19919304Speter * >2 args: object, too many args. 20019304Speter * 20119304Speter * The 1 args case depends on the argv_sexp() function refusing 20219304Speter * to return success without at least one non-blank character. 20319304Speter */ 20419304Speter switch (cmdp->argc) { 20519304Speter case 0: 20619304Speter case 1: 20719304Speter abort(); 20819304Speter /* NOTREACHED */ 20919304Speter case 2: 210254225Speter INT2CHAR(sp, cmdp->argv[1]->bp, cmdp->argv[1]->len + 1, 211254225Speter name, nlen); 21219304Speter /* 21319304Speter * !!! 21419304Speter * Historically, the read and write commands renamed 21519304Speter * "unnamed" files, or, if the file had a name, set 21619304Speter * the alternate file name. 21719304Speter */ 21819304Speter if (F_ISSET(sp->frp, FR_TMPFILE) && 21919304Speter !F_ISSET(sp->frp, FR_EXNAMED)) { 220254225Speter if ((p = strdup(name)) != NULL) { 22119304Speter free(sp->frp->name); 22219304Speter sp->frp->name = p; 22319304Speter } 22419304Speter /* 22519304Speter * The file has a real name, it's no longer a 22619304Speter * temporary, clear the temporary file flags. 22719304Speter */ 22819304Speter F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE); 22919304Speter F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED); 23019304Speter 23119304Speter /* Notify the screen. */ 23219304Speter (void)sp->gp->scr_rename(sp, sp->frp->name, 1); 233254225Speter name = sp->frp->name; 234254225Speter } else { 23519304Speter set_alt_name(sp, name); 236254225Speter name = sp->alt_name; 237254225Speter } 23819304Speter break; 23919304Speter default: 240254225Speter ex_wemsg(sp, cmdp->argv[0]->bp, EXM_FILECOUNT); 24119304Speter return (1); 24219304Speter 24319304Speter } 24419304Speter break; 24519304Speter } 24619304Speter 24719304Speter /* 24819304Speter * !!! 24919304Speter * Historically, vi did not permit reads from non-regular files, nor 25019304Speter * did it distinguish between "read !" and "read!", so there was no 25119304Speter * way to "force" it. We permit reading from named pipes too, since 25219304Speter * they didn't exist when the original implementation of vi was done 25319304Speter * and they seem a reasonable addition. 25419304Speter */ 25519304Speter if ((fp = fopen(name, "r")) == NULL || fstat(fileno(fp), &sb)) { 25619304Speter msgq_str(sp, M_SYSERR, name, "%s"); 25719304Speter return (1); 25819304Speter } 25919304Speter if (!S_ISFIFO(sb.st_mode) && !S_ISREG(sb.st_mode)) { 26019304Speter (void)fclose(fp); 26119304Speter msgq(sp, M_ERR, 26219304Speter "145|Only regular files and named pipes may be read"); 26319304Speter return (1); 26419304Speter } 26519304Speter 26619304Speter /* Try and get a lock. */ 267254225Speter if (file_lock(sp, NULL, fileno(fp), 0) == LOCK_UNAVAIL) 26819304Speter msgq(sp, M_ERR, "146|%s: read lock was unavailable", name); 26919304Speter 27019304Speter rval = ex_readfp(sp, name, fp, &cmdp->addr1, &nlines, 0); 27119304Speter 27219304Speter /* 27319304Speter * In vi, set the cursor to the first line read in, if anything read 27419304Speter * in, otherwise, the address. (Historic vi set it to the line after 27519304Speter * the address regardless, but since that line may not exist we don't 27619304Speter * bother.) 27719304Speter * 27819304Speter * In ex, set the cursor to the last line read in, if anything read in, 27919304Speter * otherwise, the address. 28019304Speter */ 28119304Speter if (F_ISSET(sp, SC_VI)) { 28219304Speter sp->lno = cmdp->addr1.lno; 28319304Speter if (nlines) 28419304Speter ++sp->lno; 28519304Speter } else 28619304Speter sp->lno = cmdp->addr1.lno + nlines; 28719304Speter return (rval); 28819304Speter} 28919304Speter 29019304Speter/* 29119304Speter * ex_readfp -- 29219304Speter * Read lines into the file. 29319304Speter * 29419304Speter * PUBLIC: int ex_readfp __P((SCR *, char *, FILE *, MARK *, recno_t *, int)); 29519304Speter */ 29619304Speterint 297254225Speterex_readfp(SCR *sp, char *name, FILE *fp, MARK *fm, recno_t *nlinesp, int silent) 29819304Speter{ 29919304Speter EX_PRIVATE *exp; 30019304Speter GS *gp; 30119304Speter recno_t lcnt, lno; 30219304Speter size_t len; 30319304Speter u_long ccnt; /* XXX: can't print off_t portably. */ 30419304Speter int nf, rval; 30519304Speter char *p; 306254225Speter size_t wlen; 307254225Speter CHAR_T *wp; 30819304Speter 30919304Speter gp = sp->gp; 31019304Speter exp = EXP(sp); 31119304Speter 31219304Speter /* 31319304Speter * Add in the lines from the output. Insertion starts at the line 31419304Speter * following the address. 31519304Speter */ 31619304Speter ccnt = 0; 31719304Speter lcnt = 0; 31819304Speter p = "147|Reading..."; 31919304Speter for (lno = fm->lno; !ex_getline(sp, fp, &len); ++lno, ++lcnt) { 32019304Speter if ((lcnt + 1) % INTERRUPT_CHECK == 0) { 32119304Speter if (INTERRUPTED(sp)) 32219304Speter break; 32319304Speter if (!silent) { 32419304Speter gp->scr_busy(sp, p, 32519304Speter p == NULL ? BUSY_UPDATE : BUSY_ON); 32619304Speter p = NULL; 32719304Speter } 32819304Speter } 329254225Speter FILE2INT5(sp, exp->ibcw, exp->ibp, len, wp, wlen); 330254225Speter if (db_append(sp, 1, lno, wp, wlen)) 33119304Speter goto err; 33219304Speter ccnt += len; 33319304Speter } 33419304Speter 33519304Speter if (ferror(fp) || fclose(fp)) 33619304Speter goto err; 33719304Speter 33819304Speter /* Return the number of lines read in. */ 33919304Speter if (nlinesp != NULL) 34019304Speter *nlinesp = lcnt; 34119304Speter 34219304Speter if (!silent) { 34319304Speter p = msg_print(sp, name, &nf); 34419304Speter msgq(sp, M_INFO, 345254225Speter "148|%s: %lu lines, %lu characters", p, 346254225Speter (u_long)lcnt, ccnt); 34719304Speter if (nf) 34819304Speter FREE_SPACE(sp, p, 0); 34919304Speter } 35019304Speter 35119304Speter rval = 0; 35219304Speter if (0) { 35319304Spetererr: msgq_str(sp, M_SYSERR, name, "%s"); 35419304Speter (void)fclose(fp); 35519304Speter rval = 1; 35619304Speter } 35719304Speter 35819304Speter if (!silent) 35919304Speter gp->scr_busy(sp, NULL, BUSY_OFF); 36019304Speter return (rval); 36119304Speter} 362