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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
/*******************************************************************/
/* slibtool: a skinny libtool implementation, written in C */
/* Copyright (C) 2016--2024 SysDeer Technologies, LLC */
/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#include <slibtool/slibtool.h>
#include "slibtool_driver_impl.h"
#include "slibtool_errinfo_impl.h"
#include "slibtool_linkcmd_impl.h"
#include "slibtool_mapfile_impl.h"
#include "slibtool_metafile_impl.h"
#include "slibtool_snprintf_impl.h"
#include "slibtool_symlink_impl.h"
#include "slibtool_spawn_impl.h"
static int slbt_linkcmd_exit(
struct slbt_deps_meta * depsmeta,
int ret)
{
if (depsmeta->altv)
free(depsmeta->altv);
if (depsmeta->args)
free(depsmeta->args);
return ret;
}
static void slbt_emit_fdwrap_dl_path_fixup(
char * cwd,
char * dpfixup,
size_t dpfixup_size,
char * wrapper)
{
char * p;
char * q;
char * wrapper_dname;
/* obtain cwd-relative directory name of wrapper */
for (p=cwd,q=wrapper; *p && *q && (*p==*q); p++,q++)
(void)0;
wrapper_dname = (*q == '/') ? (q + 1) : q;
dpfixup[0] = 0; strncat(dpfixup,"${0%/*}",dpfixup_size - 1);
/* append parent directory fixup for each level of depth in wrapper_dname */
for (p=wrapper_dname,q=0; *p; ) {
if ((p[0] == '.') && (p[1] == '/')) {
p++; p++;
} else if ((q = strchr(p, '/'))) {
strncat(dpfixup,"/..",dpfixup_size-1); p = (q + 1);
} else {
break;
}
}
strncat(dpfixup,"/",dpfixup_size-1);
}
int slbt_exec_link_create_executable(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
const char * exefilename)
{
int fdcwd;
int fdwrap;
char ** parg;
char ** xarg;
char * base;
char * ccwrap;
char cwd [PATH_MAX];
char dpfixup[PATH_MAX];
char output [PATH_MAX];
char wrapper[PATH_MAX];
char wraplnk[PATH_MAX];
bool fabspath;
bool fpic;
const struct slbt_source_version * verinfo;
struct slbt_deps_meta depsmeta = {0,0,0,0};
struct stat st;
/* initial state */
slbt_reset_arguments(ectx);
/* placeholders */
slbt_reset_placeholders(ectx);
/* fdcwd */
fdcwd = slbt_driver_fdcwd(dctx);
/* fpic */
fpic = !(dctx->cctx->drvflags & SLBT_DRIVER_ALL_STATIC);
/* input argument adjustment */
for (parg=ectx->cargv; *parg; parg++)
slbt_adjust_object_argument(*parg,fpic,true,fdcwd);
/* linker argument adjustment */
for (parg=ectx->cargv, xarg=ectx->xargv; *parg; parg++, xarg++)
if (slbt_adjust_linker_argument(
dctx,
*parg,xarg,true,
dctx->cctx->settings.dsosuffix,
dctx->cctx->settings.arsuffix,
&depsmeta) < 0)
return SLBT_NESTED_ERROR(dctx);
/* --no-undefined */
if (dctx->cctx->drvflags & SLBT_DRIVER_NO_UNDEFINED)
*ectx->noundef = "-Wl,--no-undefined";
/* executable wrapper: create */
if (slbt_snprintf(wrapper,sizeof(wrapper),
"%s.wrapper.tmp",
dctx->cctx->output) < 0)
return SLBT_BUFFER_ERROR(dctx);
if ((fdwrap = openat(fdcwd,wrapper,O_RDWR|O_CREAT|O_TRUNC,0644)) < 0)
return SLBT_SYSTEM_ERROR(dctx,wrapper);
slbt_exec_set_fdwrapper(ectx,fdwrap);
/* executable wrapper: header */
verinfo = slbt_source_version();
/* cwd, DL_PATH fixup */
if (slbt_realpath(fdcwd,".",O_DIRECTORY,cwd,sizeof(cwd)))
return SLBT_SYSTEM_ERROR(dctx,0);
slbt_emit_fdwrap_dl_path_fixup(
cwd,dpfixup,sizeof(dpfixup),
wrapper);
if (slbt_dprintf(fdwrap,
"#!/bin/sh\n"
"# libtool compatible executable wrapper\n"
"# Generated by %s (slibtool %d.%d.%d)\n"
"# [commit reference: %s]\n\n"
"if [ -z \"$%s\" ]; then\n"
"\tDL_PATH=\n"
"\tCOLON=\n"
"\tLCOLON=\n"
"else\n"
"\tDL_PATH=\n"
"\tCOLON=\n"
"\tLCOLON=':'\n"
"fi\n\n"
"DL_PATH_FIXUP=\"%s\";\n\n",
dctx->program,
verinfo->major,verinfo->minor,verinfo->revision,
verinfo->commit,
dctx->cctx->settings.ldpathenv,
dpfixup) < 0)
return SLBT_SYSTEM_ERROR(dctx,0);
/* output */
if (slbt_snprintf(output,sizeof(output),
"%s",exefilename) < 0)
return SLBT_BUFFER_ERROR(dctx);
*ectx->lout[0] = "-o";
*ectx->lout[1] = output;
/* static? */
if (dctx->cctx->drvflags & SLBT_DRIVER_ALL_STATIC)
*ectx->dpic = "-static";
/* .libs/libfoo.so --> -L.libs -lfoo */
if (slbt_exec_link_adjust_argument_vector(
dctx,ectx,&depsmeta,cwd,false))
return SLBT_NESTED_ERROR(dctx);
/* using alternate argument vector */
ccwrap = (char *)dctx->cctx->ccwrap;
ectx->argv = depsmeta.altv;
ectx->program = ccwrap ? ccwrap : depsmeta.altv[0];
/* executable wrapper symlink */
if (slbt_snprintf(wraplnk,sizeof(wraplnk),
"%s.exe.wrapper",
exefilename) < 0)
return slbt_linkcmd_exit(
&depsmeta,
SLBT_BUFFER_ERROR(dctx));
/* executable wrapper: base name */
base = strrchr(wraplnk,'/');
base++;
/* executable wrapper: footer */
fabspath = (exefilename[0] == '/');
if (slbt_dprintf(fdwrap,
"DL_PATH=\"${DL_PATH}${LCOLON}${%s}\"\n\n"
"export %s=\"$DL_PATH\"\n\n"
"if [ $(basename \"$0\") = \"%s\" ]; then\n"
"\tprogram=\"$1\"; shift\n"
"\texec \"$program\" \"$@\"\n"
"fi\n\n"
"exec %s/%s \"$@\"\n",
dctx->cctx->settings.ldpathenv,
dctx->cctx->settings.ldpathenv,
base,
fabspath ? "" : cwd,
fabspath ? &exefilename[1] : exefilename) < 0)
return slbt_linkcmd_exit(
&depsmeta,
SLBT_SYSTEM_ERROR(dctx,0));
/* sigh */
if (slbt_exec_link_finalize_argument_vector(dctx,ectx))
return SLBT_NESTED_ERROR(dctx);
/* step output */
if (!(dctx->cctx->drvflags & SLBT_DRIVER_SILENT))
if (slbt_output_link(dctx,ectx))
return slbt_linkcmd_exit(
&depsmeta,
SLBT_NESTED_ERROR(dctx));
/* spawn */
if ((slbt_spawn(ectx,true) < 0) && (ectx->pid < 0)) {
return slbt_linkcmd_exit(
&depsmeta,
SLBT_SPAWN_ERROR(dctx));
} else if (ectx->exitcode) {
return slbt_linkcmd_exit(
&depsmeta,
SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_LINK_ERROR));
}
/* executable wrapper: finalize */
slbt_exec_close_fdwrapper(ectx);
if (slbt_create_symlink(
dctx,ectx,
dctx->cctx->output,wraplnk,
SLBT_SYMLINK_WRAPPER))
return slbt_linkcmd_exit(
&depsmeta,
SLBT_NESTED_ERROR(dctx));
if (fstatat(fdcwd,wrapper,&st,0))
return slbt_linkcmd_exit(
&depsmeta,
SLBT_SYSTEM_ERROR(dctx,wrapper));
if (renameat(fdcwd,wrapper,fdcwd,dctx->cctx->output))
return slbt_linkcmd_exit(
&depsmeta,
SLBT_SYSTEM_ERROR(dctx,dctx->cctx->output));
if (fchmodat(fdcwd,dctx->cctx->output,0755,0))
return slbt_linkcmd_exit(
&depsmeta,
SLBT_SYSTEM_ERROR(dctx,dctx->cctx->output));
return slbt_linkcmd_exit(&depsmeta,0);
}
|
