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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*******************************************************************/
/* slibtool: a skinny libtool implementation, written in C */
/* Copyright (C) 2016--2021 SysDeer Technologies, LLC */
/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/
#include <fcntl.h>
#include <stdio.h>
#include <limits.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <sys/wait.h>
#include <slibtool/slibtool.h>
#include "slibtool_driver_impl.h"
#include "slibtool_spawn_impl.h"
#include "slibtool_dprintf_impl.h"
#include "slibtool_symlink_impl.h"
#include "slibtool_readlink_impl.h"
#include "slibtool_errinfo_impl.h"
static char * slbt_mri_argument(
int fdat,
char * arg,
char * buf)
{
int i;
char * lnk;
char * target;
char mricwd[PATH_MAX];
char dstbuf[PATH_MAX];
if ((!(strchr(arg,'+'))) && (!(strchr(arg,'-'))))
return arg;
if (arg[0] == '/')
target = arg;
else {
if (slbt_realpath(fdat,".",O_DIRECTORY,mricwd,sizeof(mricwd)))
return 0;
if ((size_t)snprintf(dstbuf,sizeof(dstbuf),"%s/%s",
mricwd,arg) >= sizeof(dstbuf))
return 0;
target = dstbuf;
}
for (i=0,lnk=0; i<1024 && !lnk; i++) {
if (!(tmpnam(buf)))
return 0;
if (!(symlinkat(target,fdat,buf)))
lnk = buf;
}
return lnk;
}
static void slbt_archive_import_child(
char * program,
int fd[2])
{
char * argv[3];
argv[0] = program;
argv[1] = "-M";
argv[2] = 0;
close(fd[1]);
if (dup2(fd[0],0) == 0)
execvp(program,argv);
_exit(EXIT_FAILURE);
}
int slbt_archive_import(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
char * dstarchive,
char * srcarchive)
{
int fdcwd;
pid_t pid;
pid_t rpid;
int fd[2];
char * dst;
char * src;
char * fmt;
char mridst [L_tmpnam];
char mrisrc [L_tmpnam];
char program[PATH_MAX];
/* fdcwd */
fdcwd = slbt_driver_fdcwd(dctx);
/* not needed? */
if (slbt_symlink_is_a_placeholder(fdcwd,srcarchive))
return 0;
/* program */
if ((size_t)snprintf(program,sizeof(program),
"%s",
dctx->cctx->host.ar)
>= sizeof(program))
return SLBT_BUFFER_ERROR(dctx);
/* fork */
if (pipe(fd))
return SLBT_SYSTEM_ERROR(dctx,0);
if ((pid = fork()) < 0) {
close(fd[0]);
close(fd[1]);
return SLBT_SYSTEM_ERROR(dctx,0);
}
/* child */
if (pid == 0)
slbt_archive_import_child(
program,
fd);
/* parent */
close(fd[0]);
ectx->pid = pid;
dst = slbt_mri_argument(fdcwd,dstarchive,mridst);
src = slbt_mri_argument(fdcwd,srcarchive,mrisrc);
if (!dst || !src)
return SLBT_SYSTEM_ERROR(dctx,0);
fmt = "OPEN %s\n"
"ADDLIB %s\n"
"SAVE\n"
"END\n";
if (slbt_dprintf(fd[1],fmt,dst,src) < 0) {
close(fd[1]);
return SLBT_SYSTEM_ERROR(dctx,0);
}
close(fd[1]);
rpid = waitpid(
pid,
&ectx->exitcode,
0);
if (dst == mridst)
unlinkat(fdcwd,dst,0);
if (src == mrisrc)
unlinkat(fdcwd,src,0);
return (rpid == pid) && (ectx->exitcode == 0)
? 0 : SLBT_CUSTOM_ERROR(dctx,SLBT_ERR_ARCHIVE_IMPORT);
}
|
