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/*******************************************************************/
/* 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)) < 0)
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_mri(
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);
}
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