[apple/system_cmds.git] / chkpasswd.tproj / file_passwd.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pwd.h>
#include <errno.h>
#include "stringops.h"

#define TEMP_FILE "/tmp/.pwtmp"

#define _PASSWD_FILE "/etc/master.passwd"
#define _COMPAT_FILE "/etc/passwd"
#define _PASSWD_FIELDS 10
#define BUFSIZE 8192

extern void checkpasswd(char *, char *);

static int do_compat = 1;

char *
getline(FILE *fp)
{
	static char s[BUFSIZE];
	int len;

    s[0] = '\0';

    fgets(s, BUFSIZE, fp);
    if (s == NULL || s[0] == '\0') return NULL;

	if (s[0] == '#') return s;

	len = strlen(s) - 1;
	s[len] = '\0';

	return s;
}

struct passwd *
parse_user(char *line)
{
	static struct passwd pw = {0};
	char **tokens;
	int i, len;

	if (pw.pw_name != NULL) free(pw.pw_name);
	pw.pw_name = NULL;
	if (pw.pw_passwd != NULL) free(pw.pw_passwd);
	pw.pw_passwd = NULL;
	if (pw.pw_gecos != NULL) free(pw.pw_gecos);
	pw.pw_gecos = NULL;
	if (pw.pw_dir != NULL) free(pw.pw_dir);
	pw.pw_dir = NULL;
	if (pw.pw_shell != NULL) free(pw.pw_shell);
	pw.pw_shell = NULL;

	if (pw.pw_class != NULL) free(pw.pw_class);
	pw.pw_class = NULL;

	if (line == NULL) return (struct passwd *)NULL;
	tokens = explode(line, ':');
	len = listLength(tokens);

	if (len != _PASSWD_FIELDS)
	{
		freeList(tokens);
		return (struct passwd *)NULL;
	}

	i = 0;
	pw.pw_name = tokens[i++];
	pw.pw_passwd = tokens[i++];
	pw.pw_uid = atoi(tokens[i]);
	free(tokens[i++]);
	pw.pw_gid = atoi(tokens[i]);
	free(tokens[i++]);
	pw.pw_class = tokens[i++];
	pw.pw_change = atoi(tokens[i]);
	free(tokens[i++]);
	pw.pw_expire = atoi(tokens[i]);
	free(tokens[i++]);
	pw.pw_gecos = tokens[i++];
	pw.pw_dir = tokens[i++];
	pw.pw_shell = tokens[i++];

	return &pw;
}

struct passwd *
find_user(char *uname, FILE *fp)
{
	char *line;
	struct passwd *pw;

	rewind(fp);

	while (NULL != (line = getline(fp)))
	{
		if (line[0] == '#') continue;
		pw = parse_user(line);
		if (pw == (struct passwd *)NULL) continue;
		if (!strcmp(uname, pw->pw_name)) return pw;
	}

	pw = parse_user(NULL);
	return (struct passwd *)NULL;
}

void
rewrite_file(char *pwname, FILE *fp, struct passwd *newpw)
{
	char *line;
	struct passwd *pw;
	FILE *tfp, *cfp;
	char fname[256];
	
	sprintf(fname, "%s.%d", TEMP_FILE, getpid());

	tfp = fopen(fname, "w+");
	if (tfp == NULL)
	{
		fprintf(stderr, "can't write temporary file \"%s\": ", fname);
		perror("");
		exit(1);
	}

	cfp = NULL;
	if (!strcmp(pwname, _PASSWD_FILE))
	{
		cfp = fopen(_COMPAT_FILE, "w");
		if (cfp == NULL)
		{
			fprintf(stderr, "warning: can't write compatability file \"%s\": ",
				_COMPAT_FILE);
			perror("");
		}
	}

	if (cfp != NULL)
	{
		fprintf(cfp, "#\n");
		fprintf(cfp, "# 4.3BSD-compatable User Database\n");
		fprintf(cfp, "#\n");
		fprintf(cfp, "# Note that this file is not consulted for login.\n");
		fprintf(cfp, "# It only exisits for compatability with 4.3BSD utilities.\n");
		fprintf(cfp, "#\n");
		fprintf(cfp, "# This file is automatically re-written by various system utilities.\n");
		fprintf(cfp, "# Do not edit this file.  Changes will be lost.\n");
		fprintf(cfp, "#\n");
	}

	rewind(fp);

	while (NULL != (line = getline(fp)))
	{
		if (line[0] == '#')
		{
			fprintf(tfp, "%s", line);
			continue;
		}

		pw = parse_user(line);
		if (pw == (struct passwd *)NULL)
		{
			fprintf(stderr, "warning: bad format for entry: \"%s\"\n", line);
			fprintf(tfp, "%s\n", line);
			if (cfp != NULL) fprintf(cfp, "%s\n", line);
			continue;
		}

		if (strcmp(newpw->pw_name, pw->pw_name))
		{
			fprintf(tfp, "%s\n", line);
			if (cfp != NULL) fprintf(cfp, "%s\n", line);
			continue;
		}

		fprintf(tfp, "%s:%s:%d:%d:%s:%d:%d:%s:%s:%s\n",
			newpw->pw_name, newpw->pw_passwd, newpw->pw_uid, newpw->pw_gid,
			newpw->pw_class, newpw->pw_change, newpw->pw_expire,
			newpw->pw_gecos, newpw->pw_dir, newpw->pw_shell);
		if (cfp != NULL)
		{
			fprintf(cfp, "%s:",newpw->pw_name);
			if ((newpw->pw_passwd == NULL) || (newpw->pw_passwd[0] == '\0'))
				fprintf(cfp, ":");
			else
				fprintf(cfp, "*:");
			fprintf(cfp, "%d:%d:%s:%s:%s\n",
				newpw->pw_uid, newpw->pw_gid, newpw->pw_gecos,
				newpw->pw_dir, newpw->pw_shell);
		}
	}

	if (cfp != NULL) fclose(cfp);
	fclose(fp);
	if (unlink(pwname)  < 0)
	{
		fprintf(stderr, "can't update \"%s\": ", pwname);
		perror("");
	}

	rewind(tfp);

	fp = fopen(pwname, "w");
	if (fp == NULL)
	{
		fprintf(stderr, "ERROR: lost file \"%s\"\n", pwname);
		fprintf(stderr, "new passwd file is \"%s\"\n", fname);
		perror("open");
		exit(1);
	}

	while (NULL != (line = getline(tfp)))
	{
		fprintf(fp, "%s", line);
		if (line[0] != '#') fprintf(fp, "\n");
	}
	fclose(fp);
	fclose(tfp);
	unlink(fname);
}

int
file_check_passwd(char *uname, char *locn)
{
	FILE *fp;
	char *fname;
	struct passwd *pw;

	fname = _PASSWD_FILE;
	if (locn != NULL) fname = locn;

	fp = fopen(fname, "r");
	if (fp == NULL)
	{
		fprintf(stderr, "can't read file \"%s\": ", fname);
		perror("");
		exit(1);
	}


	pw = find_user(uname, fp);
	if (pw == (struct passwd *)NULL)
	{
		fprintf(stderr, "user %s not found in file %s\n", uname, fname);
		exit(1);
	}

	checkpasswd(uname, pw->pw_passwd);
	fclose(fp);

	return 0;
}
Commit	Line	Data
1815bff5 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.0 (the 'License'). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License."
	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	#include <stdio.h>
	25	#include <stdlib.h>
	26	#include <unistd.h>
	27	#include <pwd.h>
	28	#include <errno.h>
	29	#include "stringops.h"
	30
	31	#define TEMP_FILE "/tmp/.pwtmp"
	32
	33	#define _PASSWD_FILE "/etc/master.passwd"
	34	#define _COMPAT_FILE "/etc/passwd"
	35	#define _PASSWD_FIELDS 10
	36	#define BUFSIZE 8192
	37
	38	extern void checkpasswd(char , char );
	39
	40	static int do_compat = 1;
	41
	42	char *
	43	getline(FILE *fp)
	44	{
	45	static char s[BUFSIZE];
	46	int len;
	47
	48	s[0] = '\0';
	49
	50	fgets(s, BUFSIZE, fp);
	51	if (s == NULL \|\| s[0] == '\0') return NULL;
	52
	53	if (s[0] == '#') return s;
	54
	55	len = strlen(s) - 1;
	56	s[len] = '\0';
	57
	58	return s;
	59	}
	60
	61	struct passwd *
	62	parse_user(char *line)
	63	{
	64	static struct passwd pw = {0};
65	char **tokens;
66	int i, len;
67
68	if (pw.pw_name != NULL) free(pw.pw_name);
69	pw.pw_name = NULL;
70	if (pw.pw_passwd != NULL) free(pw.pw_passwd);
71	pw.pw_passwd = NULL;
72	if (pw.pw_gecos != NULL) free(pw.pw_gecos);
73	pw.pw_gecos = NULL;
74	if (pw.pw_dir != NULL) free(pw.pw_dir);
75	pw.pw_dir = NULL;
76	if (pw.pw_shell != NULL) free(pw.pw_shell);
77	pw.pw_shell = NULL;
78
79	if (pw.pw_class != NULL) free(pw.pw_class);
80	pw.pw_class = NULL;
81
82	if (line == NULL) return (struct passwd *)NULL;
83	tokens = explode(line, ':');
84	len = listLength(tokens);
85
86	if (len != _PASSWD_FIELDS)
87	{
88	freeList(tokens);
89	return (struct passwd *)NULL;
90	}
91
92	i = 0;
93	pw.pw_name = tokens[i++];
94	pw.pw_passwd = tokens[i++];
95	pw.pw_uid = atoi(tokens[i]);
96	free(tokens[i++]);
97	pw.pw_gid = atoi(tokens[i]);
98	free(tokens[i++]);
99	pw.pw_class = tokens[i++];
100	pw.pw_change = atoi(tokens[i]);
101	free(tokens[i++]);
102	pw.pw_expire = atoi(tokens[i]);
103	free(tokens[i++]);
104	pw.pw_gecos = tokens[i++];
105	pw.pw_dir = tokens[i++];
106	pw.pw_shell = tokens[i++];
107
108	return &pw;
109	}
110
111	struct passwd *
112	find_user(char uname, FILE fp)
113	{
114	char *line;
115	struct passwd *pw;
116
117	rewind(fp);
118
119	while (NULL != (line = getline(fp)))
120	{
121	if (line[0] == '#') continue;
122	pw = parse_user(line);
123	if (pw == (struct passwd *)NULL) continue;
124	if (!strcmp(uname, pw->pw_name)) return pw;
125	}
126
127	pw = parse_user(NULL);
128	return (struct passwd *)NULL;
129	}
130
131	void
132	rewrite_file(char pwname, FILE fp, struct passwd *newpw)
133	{
134	char *line;
135	struct passwd *pw;
136	FILE tfp, cfp;
137	char fname[256];
138
139	sprintf(fname, "%s.%d", TEMP_FILE, getpid());
140
141	tfp = fopen(fname, "w+");
142	if (tfp == NULL)
143	{
144	fprintf(stderr, "can't write temporary file \"%s\": ", fname);
145	perror("");
146	exit(1);
147	}
148
149	cfp = NULL;
150	if (!strcmp(pwname, _PASSWD_FILE))
151	{
152	cfp = fopen(_COMPAT_FILE, "w");
153	if (cfp == NULL)
154	{
155	fprintf(stderr, "warning: can't write compatability file \"%s\": ",
156	_COMPAT_FILE);
157	perror("");
158	}
159	}
160
161	if (cfp != NULL)
162	{
163	fprintf(cfp, "#\n");
164	fprintf(cfp, "# 4.3BSD-compatable User Database\n");
165	fprintf(cfp, "#\n");
166	fprintf(cfp, "# Note that this file is not consulted for login.\n");
167	fprintf(cfp, "# It only exisits for compatability with 4.3BSD utilities.\n");
168	fprintf(cfp, "#\n");
169	fprintf(cfp, "# This file is automatically re-written by various system utilities.\n");
170	fprintf(cfp, "# Do not edit this file. Changes will be lost.\n");
171	fprintf(cfp, "#\n");
172	}
173
174	rewind(fp);
175
176	while (NULL != (line = getline(fp)))
177	{
178	if (line[0] == '#')
179	{
180	fprintf(tfp, "%s", line);
181	continue;
182	}
183
184	pw = parse_user(line);
185	if (pw == (struct passwd *)NULL)
186	{
187	fprintf(stderr, "warning: bad format for entry: \"%s\"\n", line);
188	fprintf(tfp, "%s\n", line);
189	if (cfp != NULL) fprintf(cfp, "%s\n", line);
190	continue;
191	}
192
193	if (strcmp(newpw->pw_name, pw->pw_name))
194	{
195	fprintf(tfp, "%s\n", line);
196	if (cfp != NULL) fprintf(cfp, "%s\n", line);
197	continue;
198	}
199
200	fprintf(tfp, "%s:%s:%d:%d:%s:%d:%d:%s:%s:%s\n",
201	newpw->pw_name, newpw->pw_passwd, newpw->pw_uid, newpw->pw_gid,
202	newpw->pw_class, newpw->pw_change, newpw->pw_expire,
203	newpw->pw_gecos, newpw->pw_dir, newpw->pw_shell);
204	if (cfp != NULL)
205	{
206	fprintf(cfp, "%s:",newpw->pw_name);
207	if ((newpw->pw_passwd == NULL) \|\| (newpw->pw_passwd[0] == '\0'))
208	fprintf(cfp, ":");
209	else
210	fprintf(cfp, "*:");
211	fprintf(cfp, "%d:%d:%s:%s:%s\n",
212	newpw->pw_uid, newpw->pw_gid, newpw->pw_gecos,
213	newpw->pw_dir, newpw->pw_shell);
214	}
215	}
216
217	if (cfp != NULL) fclose(cfp);
218	fclose(fp);
219	if (unlink(pwname) < 0)
220	{
221	fprintf(stderr, "can't update \"%s\": ", pwname);
222	perror("");
223	}
224
225	rewind(tfp);
226
227	fp = fopen(pwname, "w");
228	if (fp == NULL)
229	{
230	fprintf(stderr, "ERROR: lost file \"%s\"\n", pwname);
231	fprintf(stderr, "new passwd file is \"%s\"\n", fname);
232	perror("open");
233	exit(1);
234	}
235
236	while (NULL != (line = getline(tfp)))
237	{
238	fprintf(fp, "%s", line);
239	if (line[0] != '#') fprintf(fp, "\n");
240	}
241	fclose(fp);
242	fclose(tfp);
243	unlink(fname);
244	}
245
246	int
247	file_check_passwd(char uname, char locn)
248	{
249	FILE *fp;
250	char *fname;
251	struct passwd *pw;
252
253	fname = _PASSWD_FILE;
254	if (locn != NULL) fname = locn;
255
256	fp = fopen(fname, "r");
257	if (fp == NULL)
258	{
259	fprintf(stderr, "can't read file \"%s\": ", fname);
260	perror("");
261	exit(1);
262	}
263
264
265	pw = find_user(uname, fp);
266	if (pw == (struct passwd *)NULL)
267	{
268	fprintf(stderr, "user %s not found in file %s\n", uname, fname);
269	exit(1);
270	}
271
272	checkpasswd(uname, pw->pw_passwd);
273	fclose(fp);
274
275	return 0;
276	}