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
|
#include <sysdeps.h>
#include <ctype.h>
#include <pwd.h>
#include <string.h>
#include <iobuf/iobuf.h>
#include <msg/msg.h>
#include <msg/wrap.h>
#include <str/env.h>
#include <str/iter.h>
#include <str/str.h>
#include "bcron.h"
static int parse_assign(str* line, str* env)
{
unsigned i;
unsigned nameend;
for (i = 0; i < line->len; i)
if (isspace(line->s[i]) || line->s[i] == '=')
break;
if (i >= line->len)
return 0;
nameend = i;
while (i < line->len && isspace(line->s[i]))
i;
if (i >= line->len || line->s[i] != '=')
return 0;
i;
while (i < line->len && isspace(line->s[i]))
i;
if (i >= line->len)
return 0;
if ((line->s[i] == '"' || line->s[i] == '\'')
&& line->s[line->len - 1] == line->s[i]) {
i;
line->s[line->len - 1] = 0;
}
line->s[nameend] = 0;
wrap_str(envstr_set(env, line->s, line->s i, 1));
return 1;
}
static struct job* parse_job(str* line,
const char* runas,
const str* environ)
{
struct job_timespec times;
int i;
char* s;
s = line->s;
if ((i = timespec_parse(×, s)) == 0
|| !isspace(s[i]))
return 0;
for (s = i; isspace(*s); s) ;
if (!runas) {
runas = s;
while (*s != 0 && !isspace(*s)) s;
if (s == runas)
return 0;
*s = 0;
while (*s != 0 && isspace(*s)) s;
if (getpwnam(runas) == 0) {
warn3("Unknown user: '", runas, "'");
return 0;
}
}
if (*s == 0)
return 0;
return job_new(×, runas, s, environ);
}
int crontab_parse(struct crontab* c, str* data, const char* runas)
{
static str line;
static str env;
struct job* job;
struct job* head = 0;
struct job* tail = 0;
striter iter;
env.len = 0;
striter_loop(&iter, data, '\n') {
wrap_str(str_copyb(&line, iter.startptr, iter.len));
str_strip(&line);
if (line.len == 0
|| line.s[0] == '#')
continue;
if (parse_assign(&line, &env))
continue;
if ((job = parse_job(&line, runas, &env)) != 0) {
job->next = 0;
job->nexttime = 0;
if (head == 0)
head = job;
else
tail->next = job;
tail = job;
}
else
warn3("Ignoring unparseable line: '", line.s, "'");
}
c->jobs = head;
return 1;
}
int crontab_import(struct crontab* c, const char* path, const char* runas)
{
static str file;
struct ibuf in;
if (c->jobs) {
job_free(c->jobs);
c->jobs = 0;
}
if (!ibuf_open(&in, path, 0)) {
warn3sys("Could not open '", path, "'");
return 0;
}
minifstat(in.io.fd, &c->stat);
file.len = 0;
if (!ibuf_readall(&in, &file)) {
warn3sys("Could not read '", path, "'");
ibuf_close(&in);
return 0;
}
ibuf_close(&in);
if (!crontab_parse(c, &file, runas)) {
warn3("Could not parse '", path, "'");
return 0;
}
return 1;
}
void crontab_free(struct crontab* c)
{
job_free(c->jobs);
free(c);
}
|
