/* $OpenBSD: ex_write.c,v 1.12 2014/11/12 04:28:41 bentley 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 "../common/common.h" enum which {WN, WQ, WRITE, XIT}; static int exwr(SCR *, EXCMD *, enum which); /* * ex_wn -- :wn[!] [>>] [file] * Write to a file and switch to the next one. * * PUBLIC: int ex_wn(SCR *, EXCMD *); */ int ex_wn(SCR *sp, EXCMD *cmdp) { if (exwr(sp, cmdp, WN)) return (1); if (file_m3(sp, 0)) return (1); /* The file name isn't a new file to edit. */ cmdp->argc = 0; return (ex_next(sp, cmdp)); } /* * ex_wq -- :wq[!] [>>] [file] * Write to a file and quit. * * PUBLIC: int ex_wq(SCR *, EXCMD *); */ int ex_wq(SCR *sp, EXCMD *cmdp) { int force; if (exwr(sp, cmdp, WQ)) return (1); if (file_m3(sp, 0)) return (1); force = FL_ISSET(cmdp->iflags, E_C_FORCE); if (ex_ncheck(sp, force)) return (1); F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); return (0); } /* * ex_write -- :write[!] [>>] [file] * :write [!] [cmd] * Write to a file. * * PUBLIC: int ex_write(SCR *, EXCMD *); */ int ex_write(SCR *sp, EXCMD *cmdp) { return (exwr(sp, cmdp, WRITE)); } /* * ex_xit -- :x[it]! [file] * Write out any modifications and quit. * * PUBLIC: int ex_xit(SCR *, EXCMD *); */ int ex_xit(SCR *sp, EXCMD *cmdp) { int force; NEEDFILE(sp, cmdp); if (F_ISSET(sp->ep, F_MODIFIED) && exwr(sp, cmdp, XIT)) return (1); if (file_m3(sp, 0)) return (1); force = FL_ISSET(cmdp->iflags, E_C_FORCE); if (ex_ncheck(sp, force)) return (1); F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); return (0); } /* * exwr -- * The guts of the ex write commands. */ static int exwr(SCR *sp, EXCMD *cmdp, enum which cmd) { MARK rm; int flags; char *name, *p = NULL; NEEDFILE(sp, cmdp); /* All write commands can have an associated '!'. */ LF_INIT(FS_POSSIBLE); if (FL_ISSET(cmdp->iflags, E_C_FORCE)) LF_SET(FS_FORCE); /* Skip any leading whitespace. */ if (cmdp->argc != 0) for (p = cmdp->argv[0]->bp; isblank(*p); ++p) ; /* If "write !" it's a pipe to a utility. */ if (cmdp->argc != 0 && cmd == WRITE && *p == '!') { /* Secure means no shell access. */ if (O_ISSET(sp, O_SECURE)) { ex_emsg(sp, cmdp->cmd->name, EXM_SECURE_F); return (1); } /* Expand the argument. */ for (++p; isblank(*p); ++p); if (*p == '\0') { ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE); return (1); } if (argv_exp1(sp, cmdp, p, strlen(p), 1)) return (1); /* * Historically, vi waited after a write filter even if there * wasn't any output from the command. People complained when * nvi waited only if there was output, wanting the visual cue * that the program hadn't written anything. */ F_SET(sp, SC_EX_WAIT_YES); /* * !!! * Ignore the return cursor position, the cursor doesn't * move. */ if (ex_filter(sp, cmdp, &cmdp->addr1, &cmdp->addr2, &rm, cmdp->argv[1]->bp, FILTER_WRITE)) return (1); /* Ex terminates with a bang, even if the command fails. */ if (!F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_EX_SILENT)) (void)ex_puts(sp, "!\n"); return (0); } /* Set the FS_ALL flag if we're writing the entire file. */ if (cmdp->addr1.lno <= 1 && !db_exist(sp, cmdp->addr2.lno + 1)) LF_SET(FS_ALL); /* If "write >>" it's an append to a file. */ if (cmdp->argc != 0 && cmd != XIT && p[0] == '>' && p[1] == '>') { LF_SET(FS_APPEND); /* Skip ">>" and whitespace. */ for (p += 2; isblank(*p); ++p); } /* If no other arguments, just write the file back. */ if (cmdp->argc == 0 || *p == '\0') return (file_write(sp, &cmdp->addr1, &cmdp->addr2, NULL, flags)); /* Build an argv so we get an argument count and file expansion. */ if (argv_exp2(sp, cmdp, p, strlen(p))) return (1); /* * 0 args: impossible. * 1 args: impossible (I hope). * 2 args: read it. * >2 args: object, too many args. * * The 1 args case depends on the argv_sexp() function refusing * to return success without at least one non-blank character. */ switch (cmdp->argc) { case 0: case 1: abort(); /* NOTREACHED */ case 2: name = cmdp->argv[1]->bp; /* * !!! * Historically, the read and write commands renamed * "unnamed" files, or, if the file had a name, set * the alternate file name. */ if (F_ISSET(sp->frp, FR_TMPFILE) && !F_ISSET(sp->frp, FR_EXNAMED)) { if ((p = v_strdup(sp, cmdp->argv[1]->bp, cmdp->argv[1]->len)) != NULL) { free(sp->frp->name); sp->frp->name = p; } /* * The file has a real name, it's no longer a * temporary, clear the temporary file flags. * * !!! * If we're writing the whole file, FR_NAMECHANGE * will be cleared by the write routine -- this is * historic practice. */ F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE); F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED); /* Notify the screen. */ (void)sp->gp->scr_rename(sp, sp->frp->name, 1); } else set_alt_name(sp, name); break; default: ex_emsg(sp, p, EXM_FILECOUNT); return (1); } return (file_write(sp, &cmdp->addr1, &cmdp->addr2, name, flags)); } /* * ex_writefp -- * Write a range of lines to a FILE *. * * PUBLIC: int ex_writefp(SCR *, * PUBLIC: char *, FILE *, MARK *, MARK *, u_long *, u_long *, int); */ int ex_writefp(SCR *sp, char *name, FILE *fp, MARK *fm, MARK *tm, u_long *nlno, u_long *nch, int silent) { struct stat sb; GS *gp; u_long ccnt; /* XXX: can't print off_t portably. */ recno_t fline, tline, lcnt; size_t len; int rval; char *msg, *p; gp = sp->gp; fline = fm->lno; tline = tm->lno; if (nlno != NULL) { *nch = 0; *nlno = 0; } /* * The vi filter code has multiple processes running simultaneously, * and one of them calls ex_writefp(). The "unsafe" function calls * in this code are to db_get() and msgq(). Db_get() is safe, see * the comment in ex_filter.c:ex_filter() for details. We don't call * msgq if the multiple process bit in the EXF is set. * * !!! * Historic vi permitted files of 0 length to be written. However, * since the way vi got around dealing with "empty" files was to * always have a line in the file no matter what, it wrote them as * files of a single, empty line. We write empty files. * * "Alex, I'll take vi trivia for $1000." */ ccnt = 0; lcnt = 0; msg = "253|Writing..."; if (tline != 0) for (; fline <= tline; ++fline, ++lcnt) { /* Caller has to provide any interrupt message. */ if ((lcnt + 1) % INTERRUPT_CHECK == 0) { if (INTERRUPTED(sp)) break; if (!silent) { gp->scr_busy(sp, msg, msg == NULL ? BUSY_UPDATE : BUSY_ON); msg = NULL; } } if (db_get(sp, fline, DBG_FATAL, &p, &len)) goto err; if (fwrite(p, 1, len, fp) != len) goto err; ccnt += len; if (putc('\n', fp) != '\n') break; ++ccnt; } if (fflush(fp)) goto err; /* * XXX * I don't trust NFS -- check to make sure that we're talking to * a regular file and sync so that NFS is forced to flush. */ if (!fstat(fileno(fp), &sb) && S_ISREG(sb.st_mode) && fsync(fileno(fp))) goto err; if (fclose(fp)) { fp = NULL; goto err; } rval = 0; if (0) { err: if (!F_ISSET(sp->ep, F_MULTILOCK)) msgq_str(sp, M_SYSERR, name, "%s"); if (fp != NULL) (void)fclose(fp); rval = 1; } if (!silent) gp->scr_busy(sp, NULL, BUSY_OFF); /* Report the possibly partial transfer. */ if (nlno != NULL) { *nch = ccnt; *nlno = lcnt; } return (rval); }