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
|
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "open.h"
#include "e.h"
#include "byte.h"
#include "openreadclose.h"
int openreadclose(const char *fn, stralloc *sa, long long bufsize) {
int fd;
long long r;
struct stat st;
if (bufsize <= 1) bufsize = 32;
fd = open_read(fn);
if (fd == -1) {
if (errno == ENOENT) return 0;
return -1;
}
if (fstat(fd, &st) == -1) { close(fd); return -1; }
if (!stralloc_readyplus(sa, st.st_size)) { close(fd); return -1; }
if (!stralloc_copys(sa, "")) { close(fd); return -1; }
for (;;) {
if (!stralloc_readyplus(sa, bufsize)) { close(fd); return -1; }
r = read(fd, sa->s + sa->len, bufsize);
if (r == 0) break;
if (r == -1) {
if (errno == EINTR) continue;
if (errno == EAGAIN) continue;
if (errno == EWOULDBLOCK) continue;
close(fd);
return -1;
}
sa->len += r;
}
close(fd);
return 1;
}
|
