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

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 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 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ 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, QUIET ENJOYMENT 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 getpasswd(char *, int, int, int, int, char *, char **, 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_passwd(char *uname, char *locn)
{
	char *ne, *oc, *nc;
	FILE *fp;
	char *fname;
	struct passwd *pw;
	struct passwd newpw;
	int uid;

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

	fp = fopen(fname, "a+");
	if (fp == NULL)
	{
		fprintf(stderr, "can't write to 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);
	}

	uid = getuid();
	if ((uid != 0) && (uid != pw->pw_uid))
	{
		fprintf(stderr, "Permission denied\n");
		exit(1);
	}

	/*
	 * Get the new password
	 */
	getpasswd(uname, (uid == 0), 5, 0, 0, pw->pw_passwd, &ne, &oc, &nc);

	newpw.pw_name = copyString(pw->pw_name);
	newpw.pw_passwd = copyString(ne);
	newpw.pw_uid = pw->pw_uid;
	newpw.pw_gid = pw->pw_gid;
	newpw.pw_class = copyString(pw->pw_class);
	newpw.pw_change = pw->pw_change;
	newpw.pw_expire = pw->pw_expire;
	newpw.pw_gecos = copyString(pw->pw_gecos);
	newpw.pw_dir = copyString(pw->pw_dir);
	newpw.pw_shell = copyString(pw->pw_shell);

	/*
	 * Re-write the file
	 */
	rewrite_file(fname, fp, &newpw);

	/*
	 * Clean up memory
	 */
	pw = parse_user(NULL);
	free(newpw.pw_name);
	free(newpw.pw_passwd);
	free(newpw.pw_gecos);
	free(newpw.pw_dir);
	free(newpw.pw_shell);
	free(newpw.pw_class);

	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	*
6d658acd A	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
	7	*
	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
1815bff5 A	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
6d658acd A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1815bff5 A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	#include <stdio.h>
	26	#include <stdlib.h>
	27	#include <unistd.h>
	28	#include <pwd.h>
	29	#include <errno.h>
	30	#include "stringops.h"
	31
	32	#define TEMP_FILE "/tmp/.pwtmp"
	33
	34	#define _PASSWD_FILE "/etc/master.passwd"
	35	#define _COMPAT_FILE "/etc/passwd"
	36	#define _PASSWD_FIELDS 10
	37	#define BUFSIZE 8192
	38
	39	extern void getpasswd(char , int, int, int, int, char , char , char, char **);
	40
	41	static int do_compat = 1;
	42
	43	char *
	44	getline(FILE *fp)
	45	{
	46	static char s[BUFSIZE];
	47	int len;
	48
	49	s[0] = '\0';
	50
	51	fgets(s, BUFSIZE, fp);
	52	if (s == NULL \|\| s[0] == '\0') return NULL;
	53
	54	if (s[0] == '#') return s;
	55
	56	len = strlen(s) - 1;
	57	s[len] = '\0';
	58
	59	return s;
	60	}
	61
	62	struct passwd *
	63	parse_user(char *line)
	64	{
	65	static struct passwd pw = {0};
	66	char **tokens;
	67	int i, len;
	68
	69	if (pw.pw_name != NULL) free(pw.pw_name);
	70	pw.pw_name = NULL;
	71	if (pw.pw_passwd != NULL) free(pw.pw_passwd);
	72	pw.pw_passwd = NULL;
	73	if (pw.pw_gecos != NULL) free(pw.pw_gecos);
	74	pw.pw_gecos = NULL;
	75	if (pw.pw_dir != NULL) free(pw.pw_dir);
	76	pw.pw_dir = NULL;
	77	if (pw.pw_shell != NULL) free(pw.pw_shell);
	78	pw.pw_shell = NULL;
	79
	80	if (pw.pw_class != NULL) free(pw.pw_class);
	81	pw.pw_class = NULL;
	82
	83	if (line == NULL) return (struct passwd *)NULL;
	84	tokens = explode(line, ':');
	85	len = listLength(tokens);
86
87	if (len != _PASSWD_FIELDS)
88	{
89	freeList(tokens);
90	return (struct passwd *)NULL;
91	}
92
93	i = 0;
94	pw.pw_name = tokens[i++];
95	pw.pw_passwd = tokens[i++];
96	pw.pw_uid = atoi(tokens[i]);
97	free(tokens[i++]);
98	pw.pw_gid = atoi(tokens[i]);
99	free(tokens[i++]);
100	pw.pw_class = tokens[i++];
101	pw.pw_change = atoi(tokens[i]);
102	free(tokens[i++]);
103	pw.pw_expire = atoi(tokens[i]);
104	free(tokens[i++]);
105	pw.pw_gecos = tokens[i++];
106	pw.pw_dir = tokens[i++];
107	pw.pw_shell = tokens[i++];
108
109	return &pw;
110	}
111
112	struct passwd *
113	find_user(char uname, FILE fp)
114	{
115	char *line;
116	struct passwd *pw;
117
118	rewind(fp);
119
120	while (NULL != (line = getline(fp)))
121	{
122	if (line[0] == '#') continue;
123	pw = parse_user(line);
124	if (pw == (struct passwd *)NULL) continue;
125	if (!strcmp(uname, pw->pw_name)) return pw;
126	}
127
128	pw = parse_user(NULL);
129	return (struct passwd *)NULL;
130	}
131
132	void
133	rewrite_file(char pwname, FILE fp, struct passwd *newpw)
134	{
135	char *line;
136	struct passwd *pw;
137	FILE tfp, cfp;
138	char fname[256];
139
140	sprintf(fname, "%s.%d", TEMP_FILE, getpid());
141
142	tfp = fopen(fname, "w+");
143	if (tfp == NULL)
144	{
145	fprintf(stderr, "can't write temporary file \"%s\": ", fname);
146	perror("");
147	exit(1);
148	}
149
150	cfp = NULL;
151	if (!strcmp(pwname, _PASSWD_FILE))
152	{
153	cfp = fopen(_COMPAT_FILE, "w");
154	if (cfp == NULL)
155	{
156	fprintf(stderr, "warning: can't write compatability file \"%s\": ",
157	_COMPAT_FILE);
158	perror("");
159	}
160	}
161
162	if (cfp != NULL)
163	{
164	fprintf(cfp, "#\n");
165	fprintf(cfp, "# 4.3BSD-compatable User Database\n");
166	fprintf(cfp, "#\n");
167	fprintf(cfp, "# Note that this file is not consulted for login.\n");
168	fprintf(cfp, "# It only exisits for compatability with 4.3BSD utilities.\n");
169	fprintf(cfp, "#\n");
170	fprintf(cfp, "# This file is automatically re-written by various system utilities.\n");
171	fprintf(cfp, "# Do not edit this file. Changes will be lost.\n");
172	fprintf(cfp, "#\n");
173	}
174
175	rewind(fp);
176
177	while (NULL != (line = getline(fp)))
178	{
179	if (line[0] == '#')
180	{
181	fprintf(tfp, "%s", line);
182	continue;
183	}
184
185	pw = parse_user(line);
186	if (pw == (struct passwd *)NULL)
187	{
188	fprintf(stderr, "warning: bad format for entry: \"%s\"\n", line);
189	fprintf(tfp, "%s\n", line);
190	if (cfp != NULL) fprintf(cfp, "%s\n", line);
191	continue;
192	}
193
194	if (strcmp(newpw->pw_name, pw->pw_name))
195	{
196	fprintf(tfp, "%s\n", line);
197	if (cfp != NULL) fprintf(cfp, "%s\n", line);
198	continue;
199	}
200
201	fprintf(tfp, "%s:%s:%d:%d:%s:%d:%d:%s:%s:%s\n",
202	newpw->pw_name, newpw->pw_passwd, newpw->pw_uid, newpw->pw_gid,
203	newpw->pw_class, newpw->pw_change, newpw->pw_expire,
204	newpw->pw_gecos, newpw->pw_dir, newpw->pw_shell);
205	if (cfp != NULL)
206	{
207	fprintf(cfp, "%s:",newpw->pw_name);
208	if ((newpw->pw_passwd == NULL) \|\| (newpw->pw_passwd[0] == '\0'))
209	fprintf(cfp, ":");
210	else
211	fprintf(cfp, "*:");
212	fprintf(cfp, "%d:%d:%s:%s:%s\n",
213	newpw->pw_uid, newpw->pw_gid, newpw->pw_gecos,
214	newpw->pw_dir, newpw->pw_shell);
215	}
216	}
217
218	if (cfp != NULL) fclose(cfp);
219	fclose(fp);
220	if (unlink(pwname) < 0)
221	{
222	fprintf(stderr, "can't update \"%s\": ", pwname);
223	perror("");
224	}
225
226	rewind(tfp);
227
228	fp = fopen(pwname, "w");
229	if (fp == NULL)
230	{
231	fprintf(stderr, "ERROR: lost file \"%s\"\n", pwname);
232	fprintf(stderr, "new passwd file is \"%s\"\n", fname);
233	perror("open");
234	exit(1);
235	}
236
237	while (NULL != (line = getline(tfp)))
238	{
239	fprintf(fp, "%s", line);
240	if (line[0] != '#') fprintf(fp, "\n");
241	}
242	fclose(fp);
243	fclose(tfp);
244	unlink(fname);
245	}
246
247	int
248	file_passwd(char uname, char locn)
249	{
250	char ne, oc, *nc;
251	FILE *fp;
252	char *fname;
253	struct passwd *pw;
254	struct passwd newpw;
255	int uid;
256
257	fname = _PASSWD_FILE;
258	if (locn != NULL) fname = locn;
259
260	fp = fopen(fname, "a+");
261	if (fp == NULL)
262	{
263	fprintf(stderr, "can't write to file \"%s\": ", fname);
264	perror("");
265	exit(1);
266	}
267
268
269	pw = find_user(uname, fp);
270	if (pw == (struct passwd *)NULL)
271	{
272	fprintf(stderr, "user %s not found in file %s\n", uname, fname);
273	exit(1);
274	}
275
276	uid = getuid();
277	if ((uid != 0) && (uid != pw->pw_uid))
278	{
279	fprintf(stderr, "Permission denied\n");
280	exit(1);
281	}
282
283	/*
284	* Get the new password
285	*/
286	getpasswd(uname, (uid == 0), 5, 0, 0, pw->pw_passwd, &ne, &oc, &nc);
287
288	newpw.pw_name = copyString(pw->pw_name);
289	newpw.pw_passwd = copyString(ne);
290	newpw.pw_uid = pw->pw_uid;
291	newpw.pw_gid = pw->pw_gid;
292	newpw.pw_class = copyString(pw->pw_class);
293	newpw.pw_change = pw->pw_change;
294	newpw.pw_expire = pw->pw_expire;
295	newpw.pw_gecos = copyString(pw->pw_gecos);
296	newpw.pw_dir = copyString(pw->pw_dir);
297	newpw.pw_shell = copyString(pw->pw_shell);
298
299	/*
300	* Re-write the file
301	*/
302	rewrite_file(fname, fp, &newpw);
303
304	/*
305	* Clean up memory
306	*/
307	pw = parse_user(NULL);
308	free(newpw.pw_name);
309	free(newpw.pw_passwd);
310	free(newpw.pw_gecos);
311	free(newpw.pw_dir);
312	free(newpw.pw_shell);
313	free(newpw.pw_class);
314
315	fclose(fp);
316
317	return 0;
318	}