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_write.c 10.30 (Berkeley) 7/12/96"; 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}; 3319304Speterstatic int exwr __P((SCR *, EXCMD *, enum which)); 3419304Speter 3519304Speter/* 3619304Speter * ex_wn -- :wn[!] [>>] [file] 3719304Speter * Write to a file and switch to the next one. 3819304Speter * 3919304Speter * PUBLIC: int ex_wn __P((SCR *, EXCMD *)); 4019304Speter */ 4119304Speterint 4219304Speterex_wn(sp, cmdp) 4319304Speter SCR *sp; 4419304Speter EXCMD *cmdp; 4519304Speter{ 4619304Speter if (exwr(sp, cmdp, WN)) 4719304Speter return (1); 4819304Speter if (file_m3(sp, 0)) 4919304Speter return (1); 5019304Speter 5119304Speter /* The file name isn't a new file to edit. */ 5219304Speter cmdp->argc = 0; 5319304Speter 5419304Speter return (ex_next(sp, cmdp)); 5519304Speter} 5619304Speter 5719304Speter/* 5819304Speter * ex_wq -- :wq[!] [>>] [file] 5919304Speter * Write to a file and quit. 6019304Speter * 6119304Speter * PUBLIC: int ex_wq __P((SCR *, EXCMD *)); 6219304Speter */ 6319304Speterint 6419304Speterex_wq(sp, cmdp) 6519304Speter SCR *sp; 6619304Speter EXCMD *cmdp; 6719304Speter{ 6819304Speter int force; 6919304Speter 7019304Speter if (exwr(sp, cmdp, WQ)) 7119304Speter return (1); 7219304Speter if (file_m3(sp, 0)) 7319304Speter return (1); 7419304Speter 7519304Speter force = FL_ISSET(cmdp->iflags, E_C_FORCE); 7619304Speter 7719304Speter if (ex_ncheck(sp, force)) 7819304Speter return (1); 7919304Speter 8019304Speter F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 8119304Speter return (0); 8219304Speter} 8319304Speter 8419304Speter/* 8519304Speter * ex_write -- :write[!] [>>] [file] 8619304Speter * :write [!] [cmd] 8719304Speter * Write to a file. 8819304Speter * 8919304Speter * PUBLIC: int ex_write __P((SCR *, EXCMD *)); 9019304Speter */ 9119304Speterint 9219304Speterex_write(sp, cmdp) 9319304Speter SCR *sp; 9419304Speter EXCMD *cmdp; 9519304Speter{ 9619304Speter return (exwr(sp, cmdp, WRITE)); 9719304Speter} 9819304Speter 9919304Speter 10019304Speter/* 10119304Speter * ex_xit -- :x[it]! [file] 10219304Speter * Write out any modifications and quit. 10319304Speter * 10419304Speter * PUBLIC: int ex_xit __P((SCR *, EXCMD *)); 10519304Speter */ 10619304Speterint 10719304Speterex_xit(sp, cmdp) 10819304Speter SCR *sp; 10919304Speter EXCMD *cmdp; 11019304Speter{ 11119304Speter int force; 11219304Speter 11319304Speter NEEDFILE(sp, cmdp); 11419304Speter 11519304Speter if (F_ISSET(sp->ep, F_MODIFIED) && exwr(sp, cmdp, XIT)) 11619304Speter return (1); 11719304Speter if (file_m3(sp, 0)) 11819304Speter return (1); 11919304Speter 12019304Speter force = FL_ISSET(cmdp->iflags, E_C_FORCE); 12119304Speter 12219304Speter if (ex_ncheck(sp, force)) 12319304Speter return (1); 12419304Speter 12519304Speter F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 12619304Speter return (0); 12719304Speter} 12819304Speter 12919304Speter/* 13019304Speter * exwr -- 13119304Speter * The guts of the ex write commands. 13219304Speter */ 13319304Speterstatic int 13419304Speterexwr(sp, cmdp, cmd) 13519304Speter SCR *sp; 13619304Speter EXCMD *cmdp; 13719304Speter enum which cmd; 13819304Speter{ 13919304Speter MARK rm; 14019304Speter int flags; 14119304Speter char *name, *p; 14219304Speter 14319304Speter NEEDFILE(sp, cmdp); 14419304Speter 14519304Speter /* All write commands can have an associated '!'. */ 14619304Speter LF_INIT(FS_POSSIBLE); 14719304Speter if (FL_ISSET(cmdp->iflags, E_C_FORCE)) 14819304Speter LF_SET(FS_FORCE); 14919304Speter 15019304Speter /* Skip any leading whitespace. */ 15119304Speter if (cmdp->argc != 0) 15219304Speter for (p = cmdp->argv[0]->bp; *p != '\0' && isblank(*p); ++p); 15319304Speter 15419304Speter /* If "write !" it's a pipe to a utility. */ 15519304Speter if (cmdp->argc != 0 && cmd == WRITE && *p == '!') { 15619304Speter /* Secure means no shell access. */ 15719304Speter if (O_ISSET(sp, O_SECURE)) { 15819304Speter ex_emsg(sp, cmdp->cmd->name, EXM_SECURE_F); 15919304Speter return (1); 16019304Speter } 16119304Speter 16219304Speter /* Expand the argument. */ 16319304Speter for (++p; *p && isblank(*p); ++p); 16419304Speter if (*p == '\0') { 16519304Speter ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE); 16619304Speter return (1); 16719304Speter } 16819304Speter if (argv_exp1(sp, cmdp, p, strlen(p), 1)) 16919304Speter return (1); 17019304Speter 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. */ 20419304Speter for (p += 2; *p && isblank(*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. */ 21319304Speter 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: 23119304Speter name = cmdp->argv[1]->bp; 23219304Speter 23319304Speter /* 23419304Speter * !!! 23519304Speter * Historically, the read and write commands renamed 23619304Speter * "unnamed" files, or, if the file had a name, set 23719304Speter * the alternate file name. 23819304Speter */ 23919304Speter if (F_ISSET(sp->frp, FR_TMPFILE) && 24019304Speter !F_ISSET(sp->frp, FR_EXNAMED)) { 24119304Speter if ((p = v_strdup(sp, 24219304Speter cmdp->argv[1]->bp, cmdp->argv[1]->len)) != NULL) { 24319304Speter free(sp->frp->name); 24419304Speter sp->frp->name = p; 24519304Speter } 24619304Speter /* 24719304Speter * The file has a real name, it's no longer a 24819304Speter * temporary, clear the temporary file flags. 24919304Speter * 25019304Speter * !!! 25119304Speter * If we're writing the whole file, FR_NAMECHANGE 25219304Speter * will be cleared by the write routine -- this is 25319304Speter * historic practice. 25419304Speter */ 25519304Speter F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE); 25619304Speter F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED); 25719304Speter 25819304Speter /* Notify the screen. */ 25919304Speter (void)sp->gp->scr_rename(sp, sp->frp->name, 1); 26019304Speter } else 26119304Speter set_alt_name(sp, name); 26219304Speter break; 26319304Speter default: 26419304Speter ex_emsg(sp, p, EXM_FILECOUNT); 26519304Speter return (1); 26619304Speter } 26719304Speter 26819304Speter return (file_write(sp, &cmdp->addr1, &cmdp->addr2, name, flags)); 26919304Speter} 27019304Speter 27119304Speter/* 27219304Speter * ex_writefp -- 27319304Speter * Write a range of lines to a FILE *. 27419304Speter * 27519304Speter * PUBLIC: int ex_writefp __P((SCR *, 27619304Speter * PUBLIC: char *, FILE *, MARK *, MARK *, u_long *, u_long *, int)); 27719304Speter */ 27819304Speterint 27919304Speterex_writefp(sp, name, fp, fm, tm, nlno, nch, silent) 28019304Speter SCR *sp; 28119304Speter char *name; 28219304Speter FILE *fp; 28319304Speter MARK *fm, *tm; 28419304Speter u_long *nlno, *nch; 28519304Speter 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; 29319304Speter 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..."; 32219304Speter 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 } 33419304Speter if (db_get(sp, fline, DBG_FATAL, &p, &len)) 33519304Speter goto err; 33619304Speter if (fwrite(p, 1, len, fp) != len) 33719304Speter goto err; 33819304Speter ccnt += len; 33919304Speter if (putc('\n', fp) != '\n') 34019304Speter break; 34119304Speter ++ccnt; 34219304Speter } 34319304Speter 34419304Speter 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