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
|
/*******************************************************************/
/* slibtool: a skinny libtool implementation, written in C */
/* Copyright (C) 2015--2024 SysDeer Technologies, LLC */
/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <slibtool/slibtool.h>
#include "slibtool_driver_impl.h"
#include "slibtool_errinfo_impl.h"
int slbt_map_input(
const struct slbt_driver_ctx * dctx,
int fd,
const char * path,
int prot,
struct slbt_input * map)
{
int ret;
struct stat st;
bool fnew;
int fdcwd;
fdcwd = slbt_driver_fdcwd(dctx);
if ((fnew = (fd < 0)))
fd = openat(fdcwd,path,O_RDONLY | O_CLOEXEC);
if (fd < 0)
return SLBT_SYSTEM_ERROR(dctx,path);
if ((ret = fstat(fd,&st) < 0) && fnew)
close(fd);
else if ((st.st_size == 0) && fnew)
close(fd);
if (ret < 0)
return SLBT_SYSTEM_ERROR(dctx,path);
if (st.st_size == 0) {
map->size = 0;
map->addr = 0;
} else {
map->size = st.st_size;
map->addr = mmap(0,map->size,prot,MAP_PRIVATE,fd,0);
}
if (fnew)
close(fd);
return (map->addr == MAP_FAILED)
? SLBT_SYSTEM_ERROR(dctx,path)
: 0;
}
int slbt_unmap_input(struct slbt_input * map)
{
return map->size ? munmap(map->addr,map->size) : 0;
}
|
