src/common/gethomedir.c

#ifndef lint
static const char RCSid[] = "$Id: gethomedir.c,v 1.2 2016/03/06 01:13:17 schorsch Exp $";
#endif
/*
 *  gethomedir.c - search for a users home directory
 *
 */

#include  "copyright.h"

#include <stdlib.h>
#include <string.h>

#include "rtio.h"

#if defined(_WIN32) || defined(_WIN64)

char *
gethomedir(char *uname, char *path, int plen)
{
        char *cd, *cp;

        if (uname == NULL || *uname == '\0') {  /* ours */
                /* pretend we're on unix first (eg. for Cygwin) */
                if ((cp = getenv("HOME")) != NULL) {
                        strlcpy(path, cp, plen);
                        return path;
                }
                /* now let's see what Windows thinks */
                if ((cd = getenv("HOMEDRIVE")) != NULL
                                && (cp = getenv("HOMEPATH")) != NULL) {
                        strlcpy(path, cd, plen);
                        strlcat(path, cp, plen);
                        return path;
                }
                return NULL;
        }
        /* No idea how to find the home directory of another user */
        return NULL;
}
        
#else /* _WIN32 || _WIN64 */


#include <unistd.h>
#include <pwd.h>
#include <sys/types.h>

char *
gethomedir(char *uname, char *path, int plen)
{
        struct passwd *pwent;
        uid_t uid;
        char *cp;

        if (uname == NULL || *uname == '\0') {  /* ours */
                if ((cp = getenv("HOME")) != NULL) {
                        strlcpy(path, cp, plen);
                        return path;
                }
                uid = getuid();
                if ((pwent = getpwuid(uid)) == NULL)
                        return(NULL); /* we don't exist ?!? */
                strlcpy(path, pwent->pw_dir, plen);
                return path;
        }
        /* someone else */
        if ((pwent = getpwnam(uname)) == NULL)
                return(NULL); /* no such user */

        strlcpy(path, pwent->pw_dir, plen);
        return path;
}

#endif /* _WIN32 || _WIN64 */

Revision:	1.3
Committed:	Sun Jul 21 16:48:34 2019 UTC (4 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+7 -12 lines
Log Message:	Replaced strncpy() and strncat() with strlcpy() and strlcat() and other fixes
#	User	Rev	Content
1	schorsch	1.1	#ifndef lint
2	greg	1.3	static const char RCSid[] = "$Id: gethomedir.c,v 1.2 2016/03/06 01:13:17 schorsch Exp $";
3	schorsch	1.1	#endif
4			/*
5			* gethomedir.c - search for a users home directory
6			*
7			*/
8
9			#include "copyright.h"
10
11			#include <stdlib.h>
12			#include <string.h>
13
14			#include "rtio.h"
15
16	schorsch	1.2	#if defined(_WIN32) \|\| defined(_WIN64)
17	schorsch	1.1
18			char *
19			gethomedir(char uname, char path, int plen)
20			{
21			char cd, cp;
22
23			if (uname == NULL \|\| uname == '\0') { / ours */
24			/* pretend we're on unix first (eg. for Cygwin) */
25			if ((cp = getenv("HOME")) != NULL) {
26	greg	1.3	strlcpy(path, cp, plen);
27	schorsch	1.1	return path;
28			}
29			/* now let's see what Windows thinks */
30			if ((cd = getenv("HOMEDRIVE")) != NULL
31			&& (cp = getenv("HOMEPATH")) != NULL) {
32	greg	1.3	strlcpy(path, cd, plen);
33			strlcat(path, cp, plen);
34	schorsch	1.1	return path;
35			}
36			return NULL;
37			}
38			/* No idea how to find the home directory of another user */
39			return NULL;
40			}
41
42	schorsch	1.2	#else /* _WIN32 \|\| _WIN64 */
43	schorsch	1.1
44
45			#include <unistd.h>
46			#include <pwd.h>
47			#include <sys/types.h>
48
49			char *
50			gethomedir(char uname, char path, int plen)
51			{
52			struct passwd *pwent;
53			uid_t uid;
54			char *cp;
55
56			if (uname == NULL \|\| uname == '\0') { / ours */
57			if ((cp = getenv("HOME")) != NULL) {
58	greg	1.3	strlcpy(path, cp, plen);
59	schorsch	1.1	return path;
60			}
61			uid = getuid();
62			if ((pwent = getpwuid(uid)) == NULL)
63			return(NULL); /* we don't exist ?!? */
64	greg	1.3	strlcpy(path, pwent->pw_dir, plen);
65	schorsch	1.1	return path;
66			}
67			/* someone else */
68			if ((pwent = getpwnam(uname)) == NULL)
69			return(NULL); /* no such user */
70
71	greg	1.3	strlcpy(path, pwent->pw_dir, plen);
72	schorsch	1.1	return path;
73			}
74
75	schorsch	1.2	#endif /* _WIN32 \|\| _WIN64 */
76	schorsch	1.1