GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/vi/build/../ex/ex_cd.c Lines: 0 36 0.0 %
Date: 2017-11-13 Branches: 0 53 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: ex_cd.c,v 1.15 2016/05/27 09:18:12 martijn Exp $	*/
2
3
/*-
4
 * Copyright (c) 1992, 1993, 1994
5
 *	The Regents of the University of California.  All rights reserved.
6
 * Copyright (c) 1992, 1993, 1994, 1995, 1996
7
 *	Keith Bostic.  All rights reserved.
8
 *
9
 * See the LICENSE file for redistribution information.
10
 */
11
12
#include "config.h"
13
14
#include <sys/queue.h>
15
16
#include <bitstring.h>
17
#include <errno.h>
18
#include <limits.h>
19
#include <pwd.h>
20
#include <stdio.h>
21
#include <stdlib.h>
22
#include <string.h>
23
#include <unistd.h>
24
25
#include "../common/common.h"
26
27
/*
28
 * ex_cd -- :cd[!] [directory]
29
 *	Change directories.
30
 *
31
 * PUBLIC: int ex_cd(SCR *, EXCMD *);
32
 */
33
int
34
ex_cd(SCR *sp, EXCMD *cmdp)
35
{
36
	struct passwd *pw;
37
	ARGS *ap;
38
	CHAR_T savech;
39
	char *dir, *p, *t;
40
	char buf[PATH_MAX * 2];
41
42
	/*
43
	 * !!!
44
	 * Historic practice is that the cd isn't attempted if the file has
45
	 * been modified, unless its name begins with a leading '/' or the
46
	 * force flag is set.
47
	 */
48
	if (F_ISSET(sp->ep, F_MODIFIED) &&
49
	    !FL_ISSET(cmdp->iflags, E_C_FORCE) && sp->frp->name[0] != '/') {
50
		msgq(sp, M_ERR,
51
    "File modified since last complete write; write or use ! to override");
52
		return (1);
53
	}
54
55
	switch (cmdp->argc) {
56
	case 0:
57
		/* If no argument, change to the user's home directory. */
58
		if ((dir = getenv("HOME")) == NULL || *dir == '\0') {
59
			if ((pw = getpwuid(getuid())) == NULL ||
60
			    pw->pw_dir == NULL || pw->pw_dir[0] == '\0') {
61
				msgq(sp, M_ERR,
62
			   "Unable to find home directory location");
63
				return (1);
64
			}
65
			dir = pw->pw_dir;
66
		}
67
		break;
68
	case 1:
69
		dir = cmdp->argv[0]->bp;
70
		break;
71
	default:
72
		abort();
73
	}
74
75
	/*
76
	 * Try the current directory first.  If this succeeds, don't display
77
	 * a message, vi didn't historically, and it should be obvious to the
78
	 * user where they are.
79
	 */
80
	if (!chdir(dir))
81
		return (0);
82
83
	/*
84
	 * If moving to the user's home directory, or, the path begins with
85
	 * "/", "./" or "../", it's the only place we try.
86
	 */
87
	if (cmdp->argc == 0 ||
88
	    (ap = cmdp->argv[0])->bp[0] == '/' ||
89
	    (ap->len == 1 && ap->bp[0] == '.') ||
90
	    (ap->len >= 2 && ap->bp[0] == '.' && ap->bp[1] == '.' &&
91
	    (ap->bp[2] == '/' || ap->bp[2] == '\0')))
92
		goto err;
93
94
	/* Try the O_CDPATH option values. */
95
	for (p = t = O_STR(sp, O_CDPATH);; ++p)
96
		if (*p == '\0' || *p == ':') {
97
			/*
98
			 * Empty strings specify ".".  The only way to get an
99
			 * empty string is a leading colon, colons in a row,
100
			 * or a trailing colon.  Or, to put it the other way,
101
			 * if the length is 1 or less, then we're dealing with
102
			 * ":XXX", "XXX::XXXX" , "XXX:", or "".  Since we've
103
			 * already tried dot, we ignore them all.
104
			 */
105
			if (t < p - 1) {
106
				savech = *p;
107
				*p = '\0';
108
				(void)snprintf(buf,
109
				    sizeof(buf), "%s/%s", t, dir);
110
				*p = savech;
111
				if (!chdir(buf)) {
112
					if (getcwd(buf, sizeof(buf)) != NULL)
113
		msgq_str(sp, M_INFO, buf, "New current directory: %s");
114
					return (0);
115
				}
116
			}
117
			t = p + 1;
118
			if (*p == '\0')
119
				break;
120
		}
121
122
err:	msgq_str(sp, M_SYSERR, dir, "%s");
123
	return (1);
124
}