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 13281373Sbaptstatic const char sccsid[] = "$Id: ex_write.c,v 10.43 2015/04/03 15:18:45 zy 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 <fcntl.h> 2419304Speter#include <limits.h> 2519304Speter#include <stdio.h> 2619304Speter#include <stdlib.h> 2719304Speter#include <string.h> 2819304Speter#include <unistd.h> 2919304Speter 3019304Speter#include "../common/common.h" 3119304Speter 3219304Speterenum which {WN, WQ, WRITE, XIT}; 33281373Sbaptstatic int exwr(SCR *, EXCMD *, enum which); 3419304Speter 3519304Speter/* 3619304Speter * ex_wn -- :wn[!] [>>] [file] 3719304Speter * Write to a file and switch to the next one. 3819304Speter * 39281373Sbapt * PUBLIC: int ex_wn(SCR *, EXCMD *); 4019304Speter */ 4119304Speterint 42254225Speterex_wn(SCR *sp, EXCMD *cmdp) 4319304Speter{ 4419304Speter if (exwr(sp, cmdp, WN)) 4519304Speter return (1); 4619304Speter if (file_m3(sp, 0)) 4719304Speter return (1); 4819304Speter 4919304Speter /* The file name isn't a new file to edit. */ 5019304Speter cmdp->argc = 0; 5119304Speter 5219304Speter return (ex_next(sp, cmdp)); 5319304Speter} 5419304Speter 5519304Speter/* 5619304Speter * ex_wq -- :wq[!] [>>] [file] 5719304Speter * Write to a file and quit. 5819304Speter * 59281373Sbapt * PUBLIC: int ex_wq(SCR *, EXCMD *); 6019304Speter */ 6119304Speterint 62254225Speterex_wq(SCR *sp, EXCMD *cmdp) 6319304Speter{ 6419304Speter int force; 6519304Speter 6619304Speter if (exwr(sp, cmdp, WQ)) 6719304Speter return (1); 6819304Speter if (file_m3(sp, 0)) 6919304Speter return (1); 7019304Speter 7119304Speter force = FL_ISSET(cmdp->iflags, E_C_FORCE); 7219304Speter 7319304Speter if (ex_ncheck(sp, force)) 7419304Speter return (1); 7519304Speter 7619304Speter F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 7719304Speter return (0); 7819304Speter} 7919304Speter 8019304Speter/* 8119304Speter * ex_write -- :write[!] [>>] [file] 8219304Speter * :write [!] [cmd] 8319304Speter * Write to a file. 8419304Speter * 85281373Sbapt * PUBLIC: int ex_write(SCR *, EXCMD *); 8619304Speter */ 8719304Speterint 88254225Speterex_write(SCR *sp, EXCMD *cmdp) 8919304Speter{ 9019304Speter return (exwr(sp, cmdp, WRITE)); 9119304Speter} 9219304Speter 9319304Speter 9419304Speter/* 9519304Speter * ex_xit -- :x[it]! [file] 9619304Speter * Write out any modifications and quit. 9719304Speter * 98281373Sbapt * PUBLIC: int ex_xit(SCR *, EXCMD *); 9919304Speter */ 10019304Speterint 101254225Speterex_xit(SCR *sp, EXCMD *cmdp) 10219304Speter{ 10319304Speter int force; 10419304Speter 10519304Speter NEEDFILE(sp, cmdp); 10619304Speter 10719304Speter if (F_ISSET(sp->ep, F_MODIFIED) && exwr(sp, cmdp, XIT)) 10819304Speter return (1); 10919304Speter if (file_m3(sp, 0)) 11019304Speter return (1); 11119304Speter 11219304Speter force = FL_ISSET(cmdp->iflags, E_C_FORCE); 11319304Speter 11419304Speter if (ex_ncheck(sp, force)) 11519304Speter return (1); 11619304Speter 11719304Speter F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 11819304Speter return (0); 11919304Speter} 12019304Speter 12119304Speter/* 12219304Speter * exwr -- 12319304Speter * The guts of the ex write commands. 12419304Speter */ 12519304Speterstatic int 126254225Speterexwr(SCR *sp, EXCMD *cmdp, enum which cmd) 12719304Speter{ 12819304Speter MARK rm; 12919304Speter int flags; 130254225Speter char *name; 131254225Speter CHAR_T *p = NULL; 132254225Speter size_t nlen; 133254225Speter char *n; 134254225Speter int rc; 135254225Speter EX_PRIVATE *exp; 13619304Speter 13719304Speter NEEDFILE(sp, cmdp); 13819304Speter 13919304Speter /* All write commands can have an associated '!'. */ 14019304Speter LF_INIT(FS_POSSIBLE); 14119304Speter if (FL_ISSET(cmdp->iflags, E_C_FORCE)) 14219304Speter LF_SET(FS_FORCE); 14319304Speter 14419304Speter /* Skip any leading whitespace. */ 14519304Speter if (cmdp->argc != 0) 146254225Speter for (p = cmdp->argv[0]->bp; *p != '\0' && cmdskip(*p); ++p); 14719304Speter 14819304Speter /* If "write !" it's a pipe to a utility. */ 14919304Speter if (cmdp->argc != 0 && cmd == WRITE && *p == '!') { 15019304Speter /* Secure means no shell access. */ 15119304Speter if (O_ISSET(sp, O_SECURE)) { 152254225Speter ex_wemsg(sp, cmdp->cmd->name, EXM_SECURE_F); 15319304Speter return (1); 15419304Speter } 15519304Speter 15619304Speter /* Expand the argument. */ 157254225Speter for (++p; *p && cmdskip(*p); ++p); 15819304Speter if (*p == '\0') { 15919304Speter ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE); 16019304Speter return (1); 16119304Speter } 162254225Speter if (argv_exp1(sp, cmdp, p, STRLEN(p), 1)) 16319304Speter return (1); 16419304Speter 165254225Speter /* Set the last bang command */ 166254225Speter exp = EXP(sp); 167254225Speter free(exp->lastbcomm); 168254225Speter exp->lastbcomm = v_wstrdup(sp, cmdp->argv[1]->bp, 169254225Speter cmdp->argv[1]->len); 170254225Speter 17119304Speter /* 17219304Speter * Historically, vi waited after a write filter even if there 17319304Speter * wasn't any output from the command. People complained when 17419304Speter * nvi waited only if there was output, wanting the visual cue 17519304Speter * that the program hadn't written anything. 17619304Speter */ 17719304Speter F_SET(sp, SC_EX_WAIT_YES); 17819304Speter 17919304Speter /* 18019304Speter * !!! 18119304Speter * Ignore the return cursor position, the cursor doesn't 18219304Speter * move. 18319304Speter */ 18419304Speter if (ex_filter(sp, cmdp, &cmdp->addr1, 18519304Speter &cmdp->addr2, &rm, cmdp->argv[1]->bp, FILTER_WRITE)) 18619304Speter return (1); 18719304Speter 18819304Speter /* Ex terminates with a bang, even if the command fails. */ 18919304Speter if (!F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_EX_SILENT)) 19019304Speter (void)ex_puts(sp, "!\n"); 19119304Speter 19219304Speter return (0); 19319304Speter } 19419304Speter 19519304Speter /* Set the FS_ALL flag if we're writing the entire file. */ 19619304Speter if (cmdp->addr1.lno <= 1 && !db_exist(sp, cmdp->addr2.lno + 1)) 19719304Speter LF_SET(FS_ALL); 19819304Speter 19919304Speter /* If "write >>" it's an append to a file. */ 20019304Speter if (cmdp->argc != 0 && cmd != XIT && p[0] == '>' && p[1] == '>') { 20119304Speter LF_SET(FS_APPEND); 20219304Speter 20319304Speter /* Skip ">>" and whitespace. */ 204254225Speter for (p += 2; *p && cmdskip(*p); ++p); 20519304Speter } 20619304Speter 20719304Speter /* If no other arguments, just write the file back. */ 20819304Speter if (cmdp->argc == 0 || *p == '\0') 20919304Speter return (file_write(sp, 21019304Speter &cmdp->addr1, &cmdp->addr2, NULL, flags)); 21119304Speter 21219304Speter /* Build an argv so we get an argument count and file expansion. */ 213254225Speter if (argv_exp2(sp, cmdp, p, STRLEN(p))) 21419304Speter return (1); 21519304Speter 21619304Speter /* 21719304Speter * 0 args: impossible. 21819304Speter * 1 args: impossible (I hope). 21919304Speter * 2 args: read it. 22019304Speter * >2 args: object, too many args. 22119304Speter * 22219304Speter * The 1 args case depends on the argv_sexp() function refusing 22319304Speter * to return success without at least one non-blank character. 22419304Speter */ 22519304Speter switch (cmdp->argc) { 22619304Speter case 0: 22719304Speter case 1: 22819304Speter abort(); 22919304Speter /* NOTREACHED */ 23019304Speter case 2: 231254225Speter INT2CHAR(sp, cmdp->argv[1]->bp, cmdp->argv[1]->len+1, 232254225Speter n, nlen); 233254225Speter name = v_strdup(sp, n, nlen - 1); 23419304Speter 23519304Speter /* 23619304Speter * !!! 23719304Speter * Historically, the read and write commands renamed 23819304Speter * "unnamed" files, or, if the file had a name, set 23919304Speter * the alternate file name. 24019304Speter */ 24119304Speter if (F_ISSET(sp->frp, FR_TMPFILE) && 24219304Speter !F_ISSET(sp->frp, FR_EXNAMED)) { 243254225Speter if ((n = v_strdup(sp, name, nlen - 1)) != NULL) { 24419304Speter free(sp->frp->name); 245254225Speter sp->frp->name = n; 24619304Speter } 24719304Speter /* 24819304Speter * The file has a real name, it's no longer a 24919304Speter * temporary, clear the temporary file flags. 25019304Speter * 25119304Speter * !!! 25219304Speter * If we're writing the whole file, FR_NAMECHANGE 25319304Speter * will be cleared by the write routine -- this is 25419304Speter * historic practice. 25519304Speter */ 25619304Speter F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE); 25719304Speter F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED); 25819304Speter 25919304Speter /* Notify the screen. */ 26019304Speter (void)sp->gp->scr_rename(sp, sp->frp->name, 1); 26119304Speter } else 26219304Speter set_alt_name(sp, name); 26319304Speter break; 26419304Speter default: 265254225Speter INT2CHAR(sp, p, STRLEN(p) + 1, n, nlen); 266254225Speter ex_emsg(sp, n, EXM_FILECOUNT); 26719304Speter return (1); 26819304Speter } 26919304Speter 270254225Speter rc = file_write(sp, &cmdp->addr1, &cmdp->addr2, name, flags); 271254225Speter 272254225Speter free(name); 273254225Speter 274254225Speter return rc; 27519304Speter} 27619304Speter 27719304Speter/* 27819304Speter * ex_writefp -- 27919304Speter * Write a range of lines to a FILE *. 28019304Speter * 281281373Sbapt * PUBLIC: int ex_writefp(SCR *, 282281373Sbapt * PUBLIC: char *, FILE *, MARK *, MARK *, u_long *, u_long *, int); 28319304Speter */ 28419304Speterint 285254225Speterex_writefp(SCR *sp, char *name, FILE *fp, MARK *fm, MARK *tm, u_long *nlno, u_long *nch, int silent) 28619304Speter{ 28719304Speter struct stat sb; 28819304Speter GS *gp; 28919304Speter u_long ccnt; /* XXX: can't print off_t portably. */ 29019304Speter recno_t fline, tline, lcnt; 29119304Speter size_t len; 29219304Speter int rval; 293281373Sbapt char *msg, *p; 29419304Speter 29519304Speter gp = sp->gp; 29619304Speter fline = fm->lno; 29719304Speter tline = tm->lno; 29819304Speter 29919304Speter if (nlno != NULL) { 30019304Speter *nch = 0; 30119304Speter *nlno = 0; 30219304Speter } 30319304Speter 30419304Speter /* 30519304Speter * The vi filter code has multiple processes running simultaneously, 30619304Speter * and one of them calls ex_writefp(). The "unsafe" function calls 30719304Speter * in this code are to db_get() and msgq(). Db_get() is safe, see 30819304Speter * the comment in ex_filter.c:ex_filter() for details. We don't call 30919304Speter * msgq if the multiple process bit in the EXF is set. 31019304Speter * 31119304Speter * !!! 31219304Speter * Historic vi permitted files of 0 length to be written. However, 31319304Speter * since the way vi got around dealing with "empty" files was to 31419304Speter * always have a line in the file no matter what, it wrote them as 31519304Speter * files of a single, empty line. We write empty files. 31619304Speter * 31719304Speter * "Alex, I'll take vi trivia for $1000." 31819304Speter */ 31919304Speter ccnt = 0; 32019304Speter lcnt = 0; 32119304Speter msg = "253|Writing..."; 322281373Sbapt if (tline != 0) 32319304Speter for (; fline <= tline; ++fline, ++lcnt) { 32419304Speter /* Caller has to provide any interrupt message. */ 32519304Speter if ((lcnt + 1) % INTERRUPT_CHECK == 0) { 32619304Speter if (INTERRUPTED(sp)) 32719304Speter break; 32819304Speter if (!silent) { 32919304Speter gp->scr_busy(sp, msg, msg == NULL ? 33019304Speter BUSY_UPDATE : BUSY_ON); 33119304Speter msg = NULL; 33219304Speter } 33319304Speter } 334281373Sbapt if (db_rget(sp, fline, &p, &len)) 33519304Speter goto err; 336281373Sbapt if (fwrite(p, 1, len, fp) != len) 33719304Speter goto err; 33819304Speter ccnt += len; 339281373Sbapt if (putc('\n', fp) != '\n') 34019304Speter break; 34119304Speter ++ccnt; 34219304Speter } 34319304Speter 344281373Sbapt if (fflush(fp)) 34519304Speter goto err; 34619304Speter /* 34719304Speter * XXX 34819304Speter * I don't trust NFS -- check to make sure that we're talking to 34919304Speter * a regular file and sync so that NFS is forced to flush. 35019304Speter */ 35119304Speter if (!fstat(fileno(fp), &sb) && 35219304Speter S_ISREG(sb.st_mode) && fsync(fileno(fp))) 35319304Speter goto err; 35419304Speter 35519304Speter if (fclose(fp)) 35619304Speter goto err; 35719304Speter 35819304Speter rval = 0; 35919304Speter if (0) { 36019304Spetererr: if (!F_ISSET(sp->ep, F_MULTILOCK)) 36119304Speter msgq_str(sp, M_SYSERR, name, "%s"); 36219304Speter (void)fclose(fp); 36319304Speter rval = 1; 36419304Speter } 36519304Speter 36619304Speter if (!silent) 36719304Speter gp->scr_busy(sp, NULL, BUSY_OFF); 36819304Speter 36919304Speter /* Report the possibly partial transfer. */ 37019304Speter if (nlno != NULL) { 37119304Speter *nch = ccnt; 37219304Speter *nlno = lcnt; 37319304Speter } 37419304Speter return (rval); 37519304Speter} 376