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
|
/*
* userv - both.c
* Useful very-low-level utility routines, used in both client and daemon.
* These do not (and cannot) depend on infrastructure eg syscallerror,
* because these are not the same.
*
* userv is copyright Ian Jackson and other contributors.
* See README for full authorship information.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with userv; if not, see <http://www.gnu.org/licenses/>.
*/
/* Some nasty people can return 0/EOF + EINTR from stdio !
* These functions attempt to work around this braindamage by retrying
* the call after clearerr. If this doesn't work then clearly your
* libc is _completely_ fubar rather than just somewhat fubar.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "config.h"
#include "both.h"
void *xmalloc(size_t s) {
void *p;
p= malloc(s?s:1); if (!p) syscallerror("malloc");
return p;
}
void *xrealloc(void *p, size_t s) {
p= realloc(p,s);
if (!p) syscallerror("realloc");
return p;
}
char *xstrsave(const char *s) {
char *r;
r= xmalloc(strlen(s)+1);
strcpy(r,s);
return r;
}
int working_getc(FILE *file) {
int c;
for (;;) {
c= getc(file);
if (c != EOF || errno != EINTR) return c;
clearerr(file);
}
}
size_t working_fread(void *ptr, size_t sz, FILE *file) {
size_t done, nr;
done= 0;
for (;;) {
nr= fread((char*)ptr + done, 1, sz-done, file);
done += nr;
if (done == sz || !ferror(file) || errno != EINTR) return done;
clearerr(file);
}
}
|
