132 lines
3.0 KiB
C
132 lines
3.0 KiB
C
/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "$Id: ex_cd.c,v 10.13 2012/04/12 06:28:27 zy Exp $";
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#endif /* not lint */
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <errno.h>
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#include <limits.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "../common/common.h"
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/*
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* ex_cd -- :cd[!] [directory]
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* Change directories.
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*
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* PUBLIC: int ex_cd(SCR *, EXCMD *);
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*/
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int
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ex_cd(SCR *sp, EXCMD *cmdp)
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{
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struct passwd *pw;
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ARGS *ap;
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int savech;
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char *dir, *p, *t;
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char *buf;
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size_t dlen;
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/*
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* !!!
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* Historic practice is that the cd isn't attempted if the file has
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* been modified, unless its name begins with a leading '/' or the
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* force flag is set.
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*/
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if (F_ISSET(sp->ep, F_MODIFIED) &&
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!FL_ISSET(cmdp->iflags, E_C_FORCE) && sp->frp->name[0] != '/') {
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msgq(sp, M_ERR,
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"120|File modified since last complete write; write or use ! to override");
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return (1);
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}
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switch (cmdp->argc) {
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case 0:
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/* If no argument, change to the user's home directory. */
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if ((dir = getenv("HOME")) == NULL) {
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if ((pw = getpwuid(getuid())) == NULL ||
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pw->pw_dir == NULL || pw->pw_dir[0] == '\0') {
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msgq(sp, M_ERR,
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"121|Unable to find home directory location");
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return (1);
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}
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dir = pw->pw_dir;
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}
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break;
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case 1:
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INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
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dir, dlen);
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break;
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default:
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abort();
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}
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/*
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* Try the current directory first. If this succeeds, don't display
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* a message, vi didn't historically, and it should be obvious to the
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* user where they are.
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*/
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if (!chdir(dir))
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return (0);
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/*
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* If moving to the user's home directory, or, the path begins with
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* "/", "./" or "../", it's the only place we try.
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*/
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if (cmdp->argc == 0 ||
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(ap = cmdp->argv[0])->bp[0] == '/' ||
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(ap->len == 1 && ap->bp[0] == '.') ||
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(ap->len >= 2 && ap->bp[0] == '.' && ap->bp[1] == '.' &&
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(ap->bp[2] == '/' || ap->bp[2] == '\0')))
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goto err;
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/* Try the O_CDPATH option values. */
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for (p = t = O_STR(sp, O_CDPATH);; ++p)
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if (*p == '\0' || *p == ':') {
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/*
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* Ignore the empty strings and ".", since we've already
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* tried the current directory.
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*/
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if (t < p && (p - t != 1 || *t != '.')) {
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savech = *p;
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*p = '\0';
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if ((buf = join(t, dir)) == NULL) {
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msgq(sp, M_SYSERR, NULL);
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return (1);
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}
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*p = savech;
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if (!chdir(buf)) {
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free(buf);
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if ((buf = getcwd(NULL, 0)) != NULL) {
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msgq_str(sp, M_INFO, buf, "122|New current directory: %s");
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free(buf);
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}
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return (0);
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}
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free(buf);
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}
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t = p + 1;
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if (*p == '\0')
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break;
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}
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err: msgq_str(sp, M_SYSERR, dir, "%s");
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return (1);
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}
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