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
|
/* See LICENSE file for copyright and license details. */
#include "common.h"
static char *
spawn_read(struct libgeome_context *ctx, const char *path, const char *const *argv, size_t limit, unsigned int alarm_seconds)
{
struct spawn_join_info info;
char *ret = NULL, *new;
size_t size = 0;
size_t len = 0;
ssize_t r;
int fd, status;
if (libgeome_util_spawn_async_read(ctx, path, argv, alarm_seconds, &info, &fd))
return NULL;
for (;;) {
if (len == size) {
size += 512U;
new = realloc(ret, size);
if (!new) {
ctx->print_error(ctx, "realloc: %s\n", strerror(errno));
goto read_fail;
}
ret = new;
}
r = read(fd, &ret[len], size - len);
if (r <= 0) {
if (!r)
break;
if (errno == EINTR)
continue;
ctx->print_error(ctx, "read <pipe>: %s\n", strerror(errno));
read_fail:
close(fd);
free(ret);
ret = NULL;
libgeome_util_spawn_async_kill(ctx, &info, SIGKILL);
break;
}
len += (size_t)r;
if (len >= limit)
break;
}
if (len) {
if (len == size)
len--;
ret[len] = '\0';
} else {
free(ret);
ret = NULL;
}
if (libgeome_util_spawn_async_join(ctx, &info, &status) || status != 0) {
free(ret);
ret = NULL;
}
return ret;
}
int
libgeome_get_from_command(struct libgeome_context *ctx, struct libgeome_data *out, size_t limit,
unsigned int alarm_secs, const char *path, const char *const *argv)
{
struct location location;
char *text;
text = spawn_read(ctx, path, argv, limit ? limit : 2048U, alarm_secs);
if (!text)
return -1;
out->requested_data &= libgeome_util_parse_output(text, &location);
free(text);
if (out->requested_data & LIBGEOME_DATUM_LATITUDE) {
if (!isfinite(location.latitude) || location.latitude < -90 || location.latitude > 90) {
ctx->print_debug(ctx, "invalid latitude retrieved: %g\n", location.latitude);
out->requested_data ^= LIBGEOME_DATUM_LATITUDE;
} else {
out->latitude = location.latitude;
}
}
if (out->requested_data & LIBGEOME_DATUM_LONGITUDE) {
if (!isfinite(location.longitude) || location.longitude < -180 || location.longitude > 180) {
ctx->print_debug(ctx, "invalid longitude retrieved: %g\n", location.longitude);
out->requested_data ^= LIBGEOME_DATUM_LONGITUDE;
} else {
out->longitude = location.longitude;
}
}
return 0;
}
|
