diff options
Diffstat (limited to 'contrib/nvi/ex/ex_write.c')
-rw-r--r-- | contrib/nvi/ex/ex_write.c | 375 |
1 files changed, 375 insertions, 0 deletions
diff --git a/contrib/nvi/ex/ex_write.c b/contrib/nvi/ex/ex_write.c new file mode 100644 index 0000000..b3122e3 --- /dev/null +++ b/contrib/nvi/ex/ex_write.c @@ -0,0 +1,375 @@ +/*- + * 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" + +#ifndef lint +static const char sccsid[] = "@(#)ex_write.c 10.30 (Berkeley) 7/12/96"; +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/queue.h> +#include <sys/stat.h> + +#include <bitstring.h> +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "../common/common.h" + +enum which {WN, WQ, WRITE, XIT}; +static int exwr __P((SCR *, EXCMD *, enum which)); + +/* + * ex_wn -- :wn[!] [>>] [file] + * Write to a file and switch to the next one. + * + * PUBLIC: int ex_wn __P((SCR *, EXCMD *)); + */ +int +ex_wn(sp, cmdp) + 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 __P((SCR *, EXCMD *)); + */ +int +ex_wq(sp, cmdp) + 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 __P((SCR *, EXCMD *)); + */ +int +ex_write(sp, cmdp) + SCR *sp; + EXCMD *cmdp; +{ + return (exwr(sp, cmdp, WRITE)); +} + + +/* + * ex_xit -- :x[it]! [file] + * Write out any modifications and quit. + * + * PUBLIC: int ex_xit __P((SCR *, EXCMD *)); + */ +int +ex_xit(sp, cmdp) + 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(sp, cmdp, cmd) + SCR *sp; + EXCMD *cmdp; + enum which cmd; +{ + MARK rm; + int flags; + char *name, *p; + + 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; *p != '\0' && 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; *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; *p && 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 __P((SCR *, + * PUBLIC: char *, FILE *, MARK *, MARK *, u_long *, u_long *, int)); + */ +int +ex_writefp(sp, name, fp, fm, tm, nlno, nch, silent) + SCR *sp; + char *name; + FILE *fp; + MARK *fm, *tm; + u_long *nlno, *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)) + goto err; + + rval = 0; + if (0) { +err: if (!F_ISSET(sp->ep, F_MULTILOCK)) + msgq_str(sp, M_SYSERR, name, "%s"); + (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); +} |