1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
From: Tomas Mraz <tmraz@fedoraproject.org>
Date: Tue, 21 Jun 2011 18:26:38 +0200
Subject: Check orphaned crontabs for adoption.
Change the default behaviour of permanently ignoring crontabs with an invalid
owner (ie, getpwnam() fails) to checking for adoption every time cron wakes up.
This makes more sense as nowadays such failures are often traced back to
temporary issues, especially in the context of LDAP lookups and name-caching
daemons.
Bug-Debian: https://bugs.debian.org/634926
Bug-Ubuntu: https://bugs.launchpad.net/bugs/27520
Origin: https://git.fedorahosted.org/cgit/cronie.git/commit/?id=8b407876f276f96914111bd9954f21f627db7b11
Last-Update: 2016-01-15
Index: cron/cron.c
===================================================================
--- cron.orig/cron.c
+++ cron/cron.c
@@ -171,6 +171,7 @@ main(argc, argv)
} while (clockTime == timeRunning);
timeRunning = clockTime;
+ check_orphans(&database);
load_database(&database);
/*
Index: cron/cron.h
===================================================================
--- cron.orig/cron.h
+++ cron/cron.h
@@ -216,6 +216,13 @@ typedef struct _cron_db {
time_t sysd_mtime; /* last modtime on system crondir */
} cron_db;
+typedef struct _orphan {
+ struct _orphan *next; /* link */
+ char *uname;
+ char *fname;
+ char *tabname;
+} orphan;
+
void set_cron_uid __P((void)),
set_cron_cwd __P((void)),
load_database __P((cron_db *)),
@@ -232,7 +239,8 @@ void set_cron_uid __P((void)),
acquire_daemonlock __P((int)),
skip_comments __P((FILE *)),
log_it __P((char *, int, char *, char *)),
- log_close __P((void));
+ log_close __P((void)),
+ check_orphans __P((cron_db *));
int job_runqueue __P((void)),
set_debug_flags __P((char *)),
Index: cron/database.c
===================================================================
--- cron.orig/database.c
+++ cron/database.c
@@ -53,6 +53,9 @@ static user *get_next_system_crontab __P
void force_rescan_user(cron_db *old_db, cron_db *new_db, const char *fname, time_t old_mtime);
+static void add_orphan(const char *uname, const char *fname, const char *tabname);
+static void free_orphan(orphan *o);
+
void
load_database(old_db)
cron_db *old_db;
@@ -311,7 +314,7 @@ process_crontab(uname, fname, tabname, s
{
struct passwd *pw = NULL;
int crontab_fd = OK - 1;
- user *u;
+ user *u = NULL;
/* If the name begins with *system*, don't worry about password -
it's part of the system crontab */
@@ -321,6 +324,7 @@ process_crontab(uname, fname, tabname, s
if (strncmp(fname, "tmp.", 4)) {
/* don't log these temporary files */
log_it(fname, getpid(), "ORPHAN", "no passwd entry");
+ add_orphan(uname, fname, tabname);
}
goto next_crontab;
}
@@ -444,7 +448,10 @@ process_crontab(uname, fname, tabname, s
* 1), but this is all we've got.
*/
Debug(DLOAD, ("\t%s:", fname))
- u = find_user(old_db, fname);
+
+ if (old_db != NULL)
+ u = find_user(old_db, fname);
+
if (u != NULL) {
/* if crontab has not changed since we last read it
* in, then we can just use our existing entry.
@@ -580,3 +587,74 @@ force_rescan_user(cron_db *old_db, cron_
Debug(DLOAD, ("\t%s: [added empty placeholder to force rescan]\n", fname))
link_user(new_db, u);
}
+
+/* This fix was taken from Fedora cronie */
+static orphan *orphans;
+
+static void
+free_orphan(orphan *o) {
+ free(o->tabname);
+ free(o->fname);
+ free(o->uname);
+ free(o);
+}
+
+void
+check_orphans(cron_db *db) {
+ orphan *prev_orphan = NULL;
+ orphan *o = orphans;
+ struct stat statbuf;
+
+ while (o != NULL) {
+ if (getpwnam(o->uname) != NULL) {
+ orphan *next = o->next;
+
+ if (prev_orphan == NULL) {
+ orphans = next;
+ } else {
+ prev_orphan->next = next;
+ }
+
+ process_crontab(o->uname, o->fname, o->tabname,
+ &statbuf, db, NULL);
+
+ /* process_crontab could have added a new orphan */
+ if (prev_orphan == NULL && orphans != next) {
+ prev_orphan = orphans;
+ }
+ free_orphan(o);
+ o = next;
+ } else {
+ prev_orphan = o;
+ o = o->next;
+ }
+ }
+}
+
+static void
+add_orphan(const char *uname, const char *fname, const char *tabname) {
+ orphan *o;
+
+ o = calloc(1, sizeof(*o));
+ if (o == NULL)
+ return;
+
+ if (uname)
+ if ((o->uname=strdup(uname)) == NULL)
+ goto cleanup;
+
+ if (fname)
+ if ((o->fname=strdup(fname)) == NULL)
+ goto cleanup;
+
+ if (tabname)
+ if ((o->tabname=strdup(tabname)) == NULL)
+ goto cleanup;
+
+ o->next = orphans;
+ orphans = o;
+ return;
+
+cleanup:
+ free_orphan(o);
+}
|
