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 1319304Speterstatic const char sccsid[] = "@(#)ex_read.c 10.38 (Berkeley) 8/12/96"; 1419304Speter#endif /* not lint */ 1519304Speter 1619304Speter#include <sys/types.h> 1719304Speter#include <sys/queue.h> 1819304Speter#include <sys/stat.h> 1919304Speter#include <sys/time.h> 2019304Speter 2119304Speter#include <bitstring.h> 2219304Speter#include <ctype.h> 2319304Speter#include <errno.h> 2419304Speter#include <limits.h> 2519304Speter#include <stdio.h> 2619304Speter#include <stdlib.h> 2719304Speter#include <string.h> 2819304Speter 2919304Speter#include "../common/common.h" 3019304Speter#include "../vi/vi.h" 3119304Speter 3219304Speter/* 3319304Speter * ex_read -- :read [file] 3419304Speter * :read [!cmd] 3519304Speter * Read from a file or utility. 3619304Speter * 3719304Speter * !!! 3819304Speter * Historical vi wouldn't undo a filter read, for no apparent reason. 3919304Speter * 4019304Speter * PUBLIC: int ex_read __P((SCR *, EXCMD *)); 4119304Speter */ 4219304Speterint 4319304Speterex_read(sp, cmdp) 4419304Speter SCR *sp; 4519304Speter EXCMD *cmdp; 4619304Speter{ 4719304Speter enum { R_ARG, R_EXPANDARG, R_FILTER } which; 4819304Speter struct stat sb; 4919304Speter CHAR_T *arg, *name; 5019304Speter EX_PRIVATE *exp; 5119304Speter FILE *fp; 5219304Speter FREF *frp; 5319304Speter GS *gp; 5419304Speter MARK rm; 5519304Speter recno_t nlines; 5619304Speter size_t arglen; 5719304Speter int argc, rval; 5819304Speter char *p; 5919304Speter 6019304Speter gp = sp->gp; 6119304Speter 6219304Speter /* 6319304Speter * 0 args: read the current pathname. 6419304Speter * 1 args: check for "read !arg". 6519304Speter */ 6619304Speter switch (cmdp->argc) { 6719304Speter case 0: 6819304Speter which = R_ARG; 6919304Speter break; 7019304Speter case 1: 7119304Speter arg = cmdp->argv[0]->bp; 7219304Speter arglen = cmdp->argv[0]->len; 7319304Speter if (*arg == '!') { 7419304Speter ++arg; 7519304Speter --arglen; 7619304Speter which = R_FILTER; 7719304Speter 7819304Speter /* Secure means no shell access. */ 7919304Speter if (O_ISSET(sp, O_SECURE)) { 8019304Speter ex_emsg(sp, cmdp->cmd->name, EXM_SECURE_F); 8119304Speter return (1); 8219304Speter } 8319304Speter } else 8419304Speter which = R_EXPANDARG; 8519304Speter break; 8619304Speter default: 8719304Speter abort(); 8819304Speter /* NOTREACHED */ 8919304Speter } 9019304Speter 9119304Speter /* Load a temporary file if no file being edited. */ 9219304Speter if (sp->ep == NULL) { 9319304Speter if ((frp = file_add(sp, NULL)) == NULL) 9419304Speter return (1); 9519304Speter if (file_init(sp, frp, NULL, 0)) 9619304Speter return (1); 9719304Speter } 9819304Speter 9919304Speter switch (which) { 10019304Speter case R_FILTER: 10119304Speter /* 10219304Speter * File name and bang expand the user's argument. If 10319304Speter * we don't get an additional argument, it's illegal. 10419304Speter */ 10519304Speter argc = cmdp->argc; 10619304Speter if (argv_exp1(sp, cmdp, arg, arglen, 1)) 10719304Speter return (1); 10819304Speter if (argc == cmdp->argc) { 10919304Speter ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE); 11019304Speter return (1); 11119304Speter } 11219304Speter argc = cmdp->argc - 1; 11319304Speter 11419304Speter /* Set the last bang command. */ 11519304Speter exp = EXP(sp); 11619304Speter if (exp->lastbcomm != NULL) 11719304Speter free(exp->lastbcomm); 11819304Speter if ((exp->lastbcomm = 11919304Speter strdup(cmdp->argv[argc]->bp)) == 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, 13519304Speter "!%s\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)) { 16019304Speter ex_emsg(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: 21019304Speter name = cmdp->argv[1]->bp; 21119304Speter /* 21219304Speter * !!! 21319304Speter * Historically, the read and write commands renamed 21419304Speter * "unnamed" files, or, if the file had a name, set 21519304Speter * the alternate file name. 21619304Speter */ 21719304Speter if (F_ISSET(sp->frp, FR_TMPFILE) && 21819304Speter !F_ISSET(sp->frp, FR_EXNAMED)) { 21919304Speter if ((p = v_strdup(sp, cmdp->argv[1]->bp, 22019304Speter cmdp->argv[1]->len)) != 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); 23319304Speter } else 23419304Speter set_alt_name(sp, name); 23519304Speter break; 23619304Speter default: 23719304Speter ex_emsg(sp, cmdp->argv[0]->bp, EXM_FILECOUNT); 23819304Speter return (1); 23919304Speter 24019304Speter } 24119304Speter break; 24219304Speter } 24319304Speter 24419304Speter /* 24519304Speter * !!! 24619304Speter * Historically, vi did not permit reads from non-regular files, nor 24719304Speter * did it distinguish between "read !" and "read!", so there was no 24819304Speter * way to "force" it. We permit reading from named pipes too, since 24919304Speter * they didn't exist when the original implementation of vi was done 25019304Speter * and they seem a reasonable addition. 25119304Speter */ 25219304Speter if ((fp = fopen(name, "r")) == NULL || fstat(fileno(fp), &sb)) { 25319304Speter msgq_str(sp, M_SYSERR, name, "%s"); 25419304Speter return (1); 25519304Speter } 25619304Speter if (!S_ISFIFO(sb.st_mode) && !S_ISREG(sb.st_mode)) { 25719304Speter (void)fclose(fp); 25819304Speter msgq(sp, M_ERR, 25919304Speter "145|Only regular files and named pipes may be read"); 26019304Speter return (1); 26119304Speter } 26219304Speter 26319304Speter /* Try and get a lock. */ 26419304Speter if (file_lock(sp, NULL, NULL, fileno(fp), 0) == LOCK_UNAVAIL) 26519304Speter msgq(sp, M_ERR, "146|%s: read lock was unavailable", name); 26619304Speter 26719304Speter rval = ex_readfp(sp, name, fp, &cmdp->addr1, &nlines, 0); 26819304Speter 26919304Speter /* 27019304Speter * In vi, set the cursor to the first line read in, if anything read 27119304Speter * in, otherwise, the address. (Historic vi set it to the line after 27219304Speter * the address regardless, but since that line may not exist we don't 27319304Speter * bother.) 27419304Speter * 27519304Speter * In ex, set the cursor to the last line read in, if anything read in, 27619304Speter * otherwise, the address. 27719304Speter */ 27819304Speter if (F_ISSET(sp, SC_VI)) { 27919304Speter sp->lno = cmdp->addr1.lno; 28019304Speter if (nlines) 28119304Speter ++sp->lno; 28219304Speter } else 28319304Speter sp->lno = cmdp->addr1.lno + nlines; 28419304Speter return (rval); 28519304Speter} 28619304Speter 28719304Speter/* 28819304Speter * ex_readfp -- 28919304Speter * Read lines into the file. 29019304Speter * 29119304Speter * PUBLIC: int ex_readfp __P((SCR *, char *, FILE *, MARK *, recno_t *, int)); 29219304Speter */ 29319304Speterint 29419304Speterex_readfp(sp, name, fp, fm, nlinesp, silent) 29519304Speter SCR *sp; 29619304Speter char *name; 29719304Speter FILE *fp; 29819304Speter MARK *fm; 29919304Speter recno_t *nlinesp; 30019304Speter int silent; 30119304Speter{ 30219304Speter EX_PRIVATE *exp; 30319304Speter GS *gp; 30419304Speter recno_t lcnt, lno; 30519304Speter size_t len; 30619304Speter u_long ccnt; /* XXX: can't print off_t portably. */ 30719304Speter int nf, rval; 30819304Speter char *p; 30919304Speter 31019304Speter gp = sp->gp; 31119304Speter exp = EXP(sp); 31219304Speter 31319304Speter /* 31419304Speter * Add in the lines from the output. Insertion starts at the line 31519304Speter * following the address. 31619304Speter */ 31719304Speter ccnt = 0; 31819304Speter lcnt = 0; 31919304Speter p = "147|Reading..."; 32019304Speter for (lno = fm->lno; !ex_getline(sp, fp, &len); ++lno, ++lcnt) { 32119304Speter if ((lcnt + 1) % INTERRUPT_CHECK == 0) { 32219304Speter if (INTERRUPTED(sp)) 32319304Speter break; 32419304Speter if (!silent) { 32519304Speter gp->scr_busy(sp, p, 32619304Speter p == NULL ? BUSY_UPDATE : BUSY_ON); 32719304Speter p = NULL; 32819304Speter } 32919304Speter } 33019304Speter if (db_append(sp, 1, lno, exp->ibp, len)) 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, 34519304Speter "148|%s: %lu lines, %lu characters", p, lcnt, ccnt); 34619304Speter if (nf) 34719304Speter FREE_SPACE(sp, p, 0); 34819304Speter } 34919304Speter 35019304Speter rval = 0; 35119304Speter if (0) { 35219304Spetererr: msgq_str(sp, M_SYSERR, name, "%s"); 35319304Speter (void)fclose(fp); 35419304Speter rval = 1; 35519304Speter } 35619304Speter 35719304Speter if (!silent) 35819304Speter gp->scr_busy(sp, NULL, BUSY_OFF); 35919304Speter return (rval); 36019304Speter} 361