user.c revision 21673 
1/* Copyright 1988,1990,1993,1994 by Paul Vixie
2 * All rights reserved
3 *
4 * Distribute freely, except: don't remove my name from the source or
5 * documentation (don't take credit for my work), mark your changes (don't
6 * get me blamed for your possible bugs), don't alter or remove this
7 * notice.  May be sold if buildable source is provided to buyer.  No
8 * warrantee of any kind, express or implied, is included with this
9 * software; use at your own risk, responsibility for damages (if any) to
10 * anyone resulting from the use of this software rests entirely with the
11 * user.
12 *
13 * Send bug reports, bug fixes, enhancements, requests, flames, etc., and
14 * I'll try to keep a version up to date.  I can be reached as follows:
15 * Paul Vixie          <paul@vix.com>          uunet!decwrl!vixie!paul
16 */
17
18#if !defined(lint) && !defined(LINT)
19static char rcsid[] = "$FreeBSD: head/usr.sbin/cron/cron/user.c 21673 1997-01-14 07:20:47Z jkh $";
20#endif
21
22/* vix 26jan87 [log is in RCS file]
23 */
24
25
26#include "cron.h"
27
28
29void
30free_user(u)
31	user	*u;
32{
33	entry	*e, *ne;
34
35	free(u->name);
36	for (e = u->crontab;  e != NULL;  e = ne) {
37		ne = e->next;
38		free_entry(e);
39	}
40	free(u);
41}
42
43
44user *
45load_user(crontab_fd, pw, name)
46	int		crontab_fd;
47	struct passwd	*pw;		/* NULL implies syscrontab */
48	char		*name;
49{
50	char	envstr[MAX_ENVSTR];
51	FILE	*file;
52	user	*u;
53	entry	*e;
54	int	status;
55	char	**envp, **tenvp;
56
57	if (!(file = fdopen(crontab_fd, "r"))) {
58		perror("fdopen on crontab_fd in load_user");
59		return NULL;
60	}
61
62	Debug(DPARS, ("load_user()\n"))
63
64	/* file is open.  build user entry, then read the crontab file.
65	 */
66	if ((u = (user *) malloc(sizeof(user))) == NULL) {
67		errno = ENOMEM;
68		return NULL;
69	}
70	if ((u->name = strdup(name)) == NULL) {
71		free(u);
72		errno = ENOMEM;
73		return NULL;
74	}
75	u->crontab = NULL;
76
77	/*
78	 * init environment.  this will be copied/augmented for each entry.
79	 */
80	if ((envp = env_init()) == NULL) {
81		free(u->name);
82		free(u);
83		return NULL;
84	}
85
86	/*
87	 * load the crontab
88	 */
89	while ((status = load_env(envstr, file)) >= OK) {
90		switch (status) {
91		case ERR:
92			free_user(u);
93			u = NULL;
94			goto done;
95		case FALSE:
96			e = load_entry(file, NULL, pw, envp);
97			if (e) {
98				e->next = u->crontab;
99				u->crontab = e;
100			}
101			break;
102		case TRUE:
103			if ((tenvp = env_set(envp, envstr))) {
104				envp = tenvp;
105			} else {
106				free_user(u);
107				u = NULL;
108				goto done;
109			}
110			break;
111		}
112	}
113
114 done:
115	env_free(envp);
116	fclose(file);
117	Debug(DPARS, ("...load_user() done\n"))
118	return u;
119}
120