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|
/*******************************************************************/
/* slibtool: a skinny libtool implementation, written in C */
/* Copyright (C) 2016 Z. Gilboa */
/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/
#include <string.h>
#include <stdbool.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#include <slibtool/slibtool.h>
#include "slibtool_spawn_impl.h"
/*******************************************************************/
/* */
/* -o <ltlib> switches input result */
/* ---------- --------------------- ----- ------ */
/* libfoo.a [-shared|-static] bar.lo libfoo.a */
/* */
/* ar cru libfoo.a bar.o */
/* ranlib libfoo.a */
/* */
/*******************************************************************/
/*******************************************************************/
/* */
/* -o <ltlib> switches input result */
/* ---------- --------------------- ----- ------ */
/* libfoo.la -shared bar.lo libfoo.la */
/* .libs/libfoo.a */
/* .libs/libfoo.la (lnk) */
/* */
/* ar cru .libs/libfoo.a .libs/bar.o */
/* ranlib .libs/libfoo.a */
/* (generate libfoo.la) */
/* ln -s ../libfoo.la .libs/libfoo.la */
/* */
/*******************************************************************/
/*******************************************************************/
/* */
/* -o <ltlib> switches input result */
/* ---------- --------------------- ----- ------ */
/* libfoo.la -static bar.lo libfoo.la */
/* .libs/libfoo.a */
/* .libs/libfoo.la (lnk) */
/* */
/* ar cru .libs/libfoo.a bar.o */
/* ranlib .libs/libfoo.a */
/* (generate libfoo.la) */
/* ln -s ../libfoo.la .libs/libfoo.la */
/* */
/*******************************************************************/
static bool slbt_adjust_input_argument(char * arg, bool fpic)
{
char * slash;
char * dot;
char base[PATH_MAX];
if (*arg == '-')
return false;
if (!(dot = strrchr(arg,'.')))
return false;
if (strcmp(dot,".lo"))
return false;
if (fpic) {
if ((slash = strrchr(arg,'/')))
slash++;
else
slash = arg;
if ((size_t)snprintf(base,sizeof(base),"%s",
slash) >= sizeof(base))
return false;
sprintf(slash,".libs/%s",base);
dot = strrchr(arg,'.');
}
dot[1] = 'o';
dot[2] = '\0';
return true;
}
static bool slbt_adjust_linker_argument(
char * arg,
bool fpic,
const char * dsosuffix,
const char * arsuffix)
{
int fdlib;
char * slash;
char * dot;
char base[PATH_MAX];
if (*arg == '-')
return false;
if (!(dot = strrchr(arg,'.')))
return false;
if (strcmp(dot,".la"))
return false;
if (fpic) {
if ((slash = strrchr(arg,'/')))
slash++;
else
slash = arg;
if ((size_t)snprintf(base,sizeof(base),"%s",
slash) >= sizeof(base))
return false;
sprintf(slash,".libs/%s",base);
dot = strrchr(arg,'.');
}
/* shared library dependency? */
if (fpic) {
sprintf(dot,"%s",dsosuffix);
if ((fdlib = open(arg,O_RDONLY)) >= 0)
close(fdlib);
else
sprintf(dot,"%s",arsuffix);
return true;
}
/* input archive */
sprintf(dot,"%s",arsuffix);
return true;
}
static int slbt_exec_link_remove_file(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
const char * target)
{
/* remove target (if any) */
if (!(unlink(target)) || (errno == ENOENT))
return 0;
if (!(dctx->cctx->drvflags & SLBT_DRIVER_SILENT))
strerror(errno);
return -1;
}
static int slbt_exec_link_create_archive(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
const char * arfilename,
bool fpic)
{
char ** aarg;
char ** parg;
char * ranlib[3];
char program[PATH_MAX];
char output [PATH_MAX];
/* initial state */
slbt_reset_arguments(ectx);
/* placeholders */
slbt_reset_placeholders(ectx);
/* alternate program (ar, ranlib) */
ectx->program = program;
/* output */
if ((size_t)snprintf(output,sizeof(output),"%s",
arfilename) >= sizeof(output))
return -1;
/* ar alternate argument vector */
if ((size_t)snprintf(program,sizeof(program),"%s",
dctx->cctx->host.ar) >= sizeof(program))
return -1;
aarg = ectx->altv;
*aarg++ = program;
*aarg++ = "cru";
*aarg++ = output;
/* input argument adjustment */
for (parg=ectx->cargv; *parg; parg++)
if (slbt_adjust_input_argument(*parg,fpic))
*aarg++ = *parg;
*aarg = 0;
ectx->argv = ectx->altv;
/* step output */
if (!(dctx->cctx->drvflags & SLBT_DRIVER_SILENT))
if (slbt_output_link(dctx,ectx))
return -1;
/* remove old archive as needed */
if (slbt_exec_link_remove_file(dctx,ectx,output))
return -1;
/* ar spawn */
if ((slbt_spawn(ectx,true) < 0) || ectx->exitcode)
return -1;
/* ranlib argv */
if ((size_t)snprintf(program,sizeof(program),"%s",
dctx->cctx->host.ranlib) >= sizeof(program))
return -1;
ranlib[0] = program;
ranlib[1] = output;
ranlib[2] = 0;
ectx->argv = ranlib;
/* step output */
if (!(dctx->cctx->drvflags & SLBT_DRIVER_SILENT))
if (slbt_output_link(dctx,ectx))
return -1;
/* ranlib spawn */
if ((slbt_spawn(ectx,true) < 0) || ectx->exitcode)
return -1;
return 0;
}
static int slbt_exec_link_create_library(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
const char * dsofilename)
{
char ** parg;
char output [PATH_MAX];
/* initial state */
slbt_reset_arguments(ectx);
/* placeholders */
slbt_reset_placeholders(ectx);
/* using default argument vector */
ectx->argv = ectx->cargv;
ectx->program = ectx->cargv[0];
/* input argument adjustment */
for (parg=ectx->cargv; *parg; parg++)
slbt_adjust_input_argument(*parg,true);
/* linker argument adjustment */
for (parg=ectx->cargv; *parg; parg++)
slbt_adjust_linker_argument(
*parg,true,
dctx->cctx->settings.dsosuffix,
dctx->cctx->settings.arsuffix);
/* --no-undefined */
if (dctx->cctx->drvflags & SLBT_DRIVER_NO_UNDEFINED)
*ectx->noundef = "-Wl,--no-undefined";
/* shared object */
*ectx->dpic = "-shared";
*ectx->fpic = "-fPIC";
/* output */
if ((size_t)snprintf(output,sizeof(output),"%s.%d.%d.%d",
dsofilename,
dctx->cctx->verinfo.major,
dctx->cctx->verinfo.minor,
dctx->cctx->verinfo.revision)
>= sizeof(output))
return -1;
*ectx->lout[0] = "-o";
*ectx->lout[1] = output;
/* step output */
if (!(dctx->cctx->drvflags & SLBT_DRIVER_SILENT))
if (slbt_output_link(dctx,ectx))
return -1;
/* spawn */
if ((slbt_spawn(ectx,true) < 0) || ectx->exitcode)
return -1;
return 0;
}
static int slbt_exec_link_create_symlink(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
const char * target,
char * lnkname,
bool flawrapper)
{
const char * slash;
char * ln[5];
char * dotdot;
char atarget[PATH_MAX];
/* atarget */
if ((slash = strrchr(target,'/')))
slash++;
else
slash = target;
dotdot = flawrapper ? "../" : "";
if ((size_t)snprintf(atarget,sizeof(atarget),"%s%s",
dotdot,slash) >= sizeof(atarget))
return -1;
/* ln argv (fake) */
ln[0] = "ln";
ln[1] = "-s";
ln[2] = atarget;
ln[3] = lnkname;
ln[4] = 0;
ectx->argv = ln;
/* step output */
if (!(dctx->cctx->drvflags & SLBT_DRIVER_SILENT))
if (slbt_output_link(dctx,ectx))
return -1;
/* remove old symlink as needed */
if (slbt_exec_link_remove_file(dctx,ectx,lnkname))
return -1;
/* create symlink */
return symlink(atarget,lnkname);
}
static int slbt_exec_link_create_library_symlink(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
bool fmajor)
{
char target[PATH_MAX];
char lnkname[PATH_MAX];
sprintf(target,"%s.%d.%d.%d",
ectx->dsofilename,
dctx->cctx->verinfo.major,
dctx->cctx->verinfo.minor,
dctx->cctx->verinfo.revision);
if (fmajor)
sprintf(lnkname,"%s.%d",
ectx->dsofilename,
dctx->cctx->verinfo.major);
else
strcpy(lnkname,ectx->dsofilename);
return slbt_exec_link_create_symlink(
dctx,ectx,
target,lnkname,
false);
}
int slbt_exec_link(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx)
{
int ret;
int fdlibs;
const char * output;
char * dot;
FILE * fout;
struct slbt_exec_ctx * actx;
/* context */
if (ectx)
actx = 0;
else if ((ret = slbt_get_exec_ctx(dctx,&ectx)))
return ret;
else
actx = ectx;
/* output suffix */
output = dctx->cctx->output;
dot = strrchr(output,'.');
/* .libs directory */
if (dctx->cctx->drvflags & SLBT_DRIVER_SHARED) {
if ((fdlibs = open(ectx->ldirname,O_DIRECTORY)) >= 0)
close(fdlibs);
else if ((errno != ENOENT) || mkdir(ectx->ldirname,0777)) {
slbt_free_exec_ctx(actx);
return -1;
}
}
/* non-pic libfoo.a */
if (dot && !strcmp(dot,".a"))
if (slbt_exec_link_create_archive(dctx,ectx,output,false)) {
slbt_free_exec_ctx(actx);
return -1;
}
/* pic libfoo.a */
if (dot && !strcmp(dot,".la"))
if (slbt_exec_link_create_archive(
dctx,ectx,
ectx->arfilename,
dctx->cctx->drvflags & SLBT_DRIVER_SHARED)) {
slbt_free_exec_ctx(actx);
return -1;
}
/* dynamic library */
if (dot && !strcmp(dot,".la") && dctx->cctx->rpath) {
/* linking: libfoo.so.x.y.z */
if (slbt_exec_link_create_library(
dctx,ectx,
ectx->dsofilename)) {
slbt_free_exec_ctx(actx);
return -1;
}
/* symlink: libfoo.so.x --> libfoo.so.x.y.z */
if (slbt_exec_link_create_library_symlink(
dctx,ectx,
true)) {
slbt_free_exec_ctx(actx);
return -1;
}
/* symlink: libfoo.so --> libfoo.so.x.y.z */
if (slbt_exec_link_create_library_symlink(
dctx,ectx,
false)) {
slbt_free_exec_ctx(actx);
return -1;
}
}
/* no wrapper? */
if (!dot || strcmp(dot,".la")) {
slbt_free_exec_ctx(actx);
return 0;
}
/* hey, yo, let's rap it up */
if (!(fout = fopen(output,"w"))) {
slbt_free_exec_ctx(actx);
return -1;
}
ret = fprintf(fout,
"# slibtool (pre-alphe) generated file\n\n");
/* wrapper symlink */
if (slbt_exec_link_create_symlink(
dctx,ectx,
output,
ectx->lafilename,
true)) {
slbt_free_exec_ctx(actx);
return -1;
}
/* all done */
fclose(fout);
slbt_free_exec_ctx(actx);
return (ret > 0) ? 0 : -1;
}
|
