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/***************************************************************/
/* perk: PE Resource Kit */
/* Copyright (C) 2015--2016 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.PERK. */
/***************************************************************/
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#define ARGV_DRIVER
#include <perk/perk.h>
#include <perk/perk_output.h>
#include "perk_driver_impl.h"
#include "argv/argv.h"
struct pe_driver_ctx_alloc {
struct argv_meta * meta;
struct pe_driver_ctx_impl ctx;
uint64_t guard;
const char * units[];
};
static uint32_t pe_argv_flags(uint32_t flags)
{
uint32_t ret = 0;
if (flags & PERK_DRIVER_VERBOSITY_NONE)
ret |= ARGV_VERBOSITY_NONE;
if (flags & PERK_DRIVER_VERBOSITY_ERRORS)
ret |= ARGV_VERBOSITY_ERRORS;
if (flags & PERK_DRIVER_VERBOSITY_STATUS)
ret |= ARGV_VERBOSITY_STATUS;
return ret;
}
static int pe_driver_usage(
const char * program,
const char * arg,
const struct argv_option * options,
struct argv_meta * meta)
{
char header[512];
snprintf(header,sizeof(header),
"Usage: %s [options] <file>...\n" "Options:\n",
program);
argv_usage(stdout,header,options,arg);
argv_free(meta);
return PERK_USAGE;
}
static struct pe_driver_ctx_impl * pe_driver_ctx_alloc(
struct argv_meta * meta,
const struct pe_common_ctx * cctx,
size_t nunits)
{
struct pe_driver_ctx_alloc * ictx;
size_t size;
struct argv_entry * entry;
const char ** units;
size = sizeof(struct pe_driver_ctx_alloc);
size += (nunits+1)*sizeof(const char *);
if (!(ictx = calloc(1,size)))
return 0;
if (cctx)
memcpy(&ictx->ctx.cctx,cctx,sizeof(*cctx));
ictx->meta = meta;
ictx->ctx.cctx.symctx = &ictx->ctx.symctx;
ictx->ctx.cctx.outctx = &ictx->ctx.outctx;
ictx->ctx.cctx.lnkctx = &ictx->ctx.lnkctx;
ictx->ctx.cctx.srvctx = &ictx->ctx.srvctx;
ictx->ctx.cctx.ioctx = &ictx->ctx.ioctx;
for (entry=meta->entries,units=ictx->units; entry->fopt || entry->arg; entry++)
if (!entry->fopt)
*units++ = entry->arg;
ictx->ctx.ctx.units = ictx->units;
return &ictx->ctx;
}
static int pe_get_driver_ctx_fail(struct argv_meta * meta)
{
argv_free(meta);
return -1;
}
int pe_get_driver_ctx(
char ** argv,
char ** envp,
uint32_t flags,
struct pe_driver_ctx ** pctx)
{
struct pe_driver_ctx_impl * ctx;
struct pe_common_ctx cctx;
const struct argv_option * options;
struct argv_meta * meta;
struct argv_entry * entry;
size_t nunits;
const char * program;
const char * pretty;
int fdout;
options = pe_default_options;
if (!(meta = argv_get(argv,options,pe_argv_flags(flags))))
return -1;
pretty = 0;
nunits = 0;
fdout = 0;
program = argv_program_name(argv[0]);
memset(&cctx,0,sizeof(cctx));
if (!argv[1] && (flags & PERK_DRIVER_VERBOSITY_USAGE))
return pe_driver_usage(program,0,options,meta);
/* get options, count units */
for (entry=meta->entries; entry->fopt || entry->arg; entry++) {
if (entry->fopt) {
switch (entry->tag) {
case TAG_HELP:
if (flags & PERK_DRIVER_VERBOSITY_USAGE)
return pe_driver_usage(program,entry->arg,options,meta);
case TAG_VERSION:
cctx.drvflags |= PERK_DRIVER_VERSION;
break;
case TAG_OUTPUT:
cctx.output = entry->arg;
break;
case TAG_PRETTY:
pretty = entry->arg;
break;
case TAG_EXPSYMS:
cctx.fmtflags |= PERK_OUTPUT_EXPORT_SYMS;
break;
case TAG_IMPLIBS:
cctx.fmtflags |= PERK_OUTPUT_IMPORT_LIBS;
break;
case TAG_IMPSYMS:
cctx.fmtflags |= PERK_OUTPUT_IMPORT_SYMS;
break;
}
} else
nunits++;
}
if (cctx.output && ((fdout = open(cctx.output,
O_CREAT|O_TRUNC|O_WRONLY|O_NOCTTY|O_NOFOLLOW,
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0))
return pe_get_driver_ctx_fail(meta);
if (pretty && !strcmp(pretty,"yaml"))
cctx.fmtflags |= PERK_PRETTY_YAML;
else if (pretty && !strcmp(pretty,"dlltool"))
cctx.fmtflags |= PERK_PRETTY_DLLTOOL;
if (!(ctx = pe_driver_ctx_alloc(meta,&cctx,nunits)) && cctx.output)
close(fdout);
if (!ctx)
return pe_get_driver_ctx_fail(meta);
ctx->ctx.program = program;
ctx->ctx.cctx = &ctx->cctx;
ctx->ioctx.fdout = cctx.output ? fdout : -1;
ctx->ioctx.fdin = -1;
ctx->ioctx.fderr = -1;
ctx->ioctx.fdlog = -1;
ctx->ioctx.fdsrc = AT_FDCWD;
ctx->ioctx.fddst = AT_FDCWD;
ctx->ioctx.fdtmp = AT_FDCWD;
*pctx = &ctx->ctx;
return PERK_OK;
}
static void pe_driver_close_fds(struct pe_common_ctx * cctx)
{
if (cctx->ioctx->status && cctx->output)
unlinkat(cctx->ioctx->fddst,cctx->output,0);
if (cctx->ioctx->fdout >= 0)
close(cctx->ioctx->fdout);
}
static void pe_free_driver_ctx_impl(struct pe_driver_ctx_alloc * ictx)
{
if (ictx->ctx.symctx.append)
free(ictx->ctx.symctx.append);
if (ictx->ctx.symctx.exclude)
free(ictx->ctx.symctx.exclude);
pe_driver_close_fds(&ictx->ctx.cctx);
argv_free(ictx->meta);
free(ictx);
}
void pe_free_driver_ctx(struct pe_driver_ctx * ctx)
{
struct pe_driver_ctx_alloc * ictx;
uintptr_t addr;
if (ctx) {
addr = (uintptr_t)ctx - offsetof(struct pe_driver_ctx_alloc,ctx);
addr = addr - offsetof(struct pe_driver_ctx_impl,ctx);
ictx = (struct pe_driver_ctx_alloc *)addr;
pe_free_driver_ctx_impl(ictx);
}
}
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