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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 <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_spawn_impl.h"
static char * slbt_mri_argument(
char * arg,
char * buf)
{
int i;
char * lnk;
char mricwd[PATH_MAX];
char target[PATH_MAX];
if ((!(strchr(arg,'+'))) && (!(strchr(arg,'-'))))
return arg;
if (!(getcwd(mricwd,sizeof(mricwd))))
return 0;
if ((size_t)snprintf(target,sizeof(target),"%s/%s",
mricwd,arg) >= sizeof(target))
return 0;
for (i=0,lnk=0; i<1024 && !lnk; i++) {
if (!(tmpnam(buf)))
return 0;
if (!(symlink(target,buf)))
lnk = buf;
}
return lnk;
}
static int slbt_archive_import_child(
char * program,
int fd[2])
{
char * argv[3];
argv[0] = program;
argv[1] = "-M";
argv[2] = 0;
close(fd[1]);
close(0);
if (dup(fd[0]) == 0)
execvp(program,argv);
exit(EXIT_FAILURE);
return -1;
}
int slbt_archive_import(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
char * dstarchive,
char * srcarchive)
{
int ret;
pid_t pid;
pid_t rpid;
int fd[2];
FILE * fout;
char * dst;
char * src;
char mridst [L_tmpnam];
char mrisrc [L_tmpnam];
char program[PATH_MAX];
if ((size_t)snprintf(program,sizeof(program),"%s",
dctx->cctx->host.ar) >= sizeof(program))
return -1;
if (pipe(fd))
return -1;
if ((pid = fork()) < 0) {
close(fd[0]);
close(fd[1]);
return -1;
}
if (pid == 0)
return slbt_archive_import_child(
program,
fd);
ectx->pid = pid;
dst = slbt_mri_argument(dstarchive,mridst);
src = slbt_mri_argument(srcarchive,mrisrc);
if ((fout = fdopen(fd[1],"a"))) {
ret = (fprintf(
fout,
"OPEN %s\n"
"ADDLIB %s\n"
"SAVE\n"
"END\n",
dst,
src) < 0)
? -1 : 0;
fclose(fout);
close(fd[0]);
} else {
ret = -1;
close(fd[0]);
close(fd[1]);
}
rpid = waitpid(
pid,
&ectx->exitcode,
0);
if (dst == mridst)
unlink(dst);
if (src == mrisrc)
unlink(src);
return ret || (rpid != pid) || ectx->exitcode
? -1 : 0;
}
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