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#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <perk/perk.h>
#include <perk/perk_output.h>
#include "argv/argv.h"
enum app_tags {
TAG_HELP,
TAG_VERSION,
TAG_OUTPUT,
TAG_PRETTY,
TAG_EXPSYMS,
TAG_IMPLIBS,
TAG_IMPSYMS,
};
static const struct argv_option options[] = {
{"version", 'v',TAG_VERSION,ARGV_OPTARG_NONE, 0,0,
"show version information"},
{"help", 'h',TAG_HELP, ARGV_OPTARG_OPTIONAL, "short|long",0,
"show usage information "
"[listing %s options only]"},
{"output", 'o',TAG_OUTPUT, ARGV_OPTARG_REQUIRED, 0,"<file>",
"write output to %s"},
{"pretty", 'p',TAG_PRETTY, ARGV_OPTARG_REQUIRED, "yaml",0,
"format output for parsing by %s"},
{"expsyms", 'e',TAG_EXPSYMS,ARGV_OPTARG_NONE, 0,0,
"print exported symbols" },
{"implibs", 'i',TAG_IMPLIBS,ARGV_OPTARG_NONE, 0,0,
"list direct dependency libraries"},
{"impsyms", 'I',TAG_IMPSYMS,ARGV_OPTARG_NONE, 0,0,
"list direct dependency libraries "
"along with required symbols"},
{0}
};
struct pe_driver_ctx_impl {
struct argv_meta * meta;
struct pe_symbol_ctx symctx;
struct pe_output_ctx outctx;
struct pe_linker_ctx lnkctx;
struct pe_server_ctx srvctx;
struct pe_driver_ctx 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,
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 * pe_driver_ctx_alloc(struct argv_meta * meta, size_t nunits)
{
struct pe_driver_ctx_impl * ictx;
size_t size;
struct argv_entry * entry;
const char ** units;
size = sizeof(struct pe_driver_ctx_impl);
size += (nunits+1)*sizeof(const char *);
if (!(ictx = calloc(size,1)))
return 0;
ictx->meta = meta;
ictx->ctx.cctx.symctx = &ictx->symctx;
ictx->ctx.cctx.outctx = &ictx->outctx;
ictx->ctx.cctx.lnkctx = &ictx->lnkctx;
ictx->ctx.cctx.srvctx = &ictx->srvctx;
for (entry=meta->entries,units=ictx->units; entry->fopt || entry->arg; entry++)
if (!entry->fopt)
*units++ = entry->arg;
ictx->ctx.units = ictx->units;
return &ictx->ctx;
}
int pe_get_driver_ctx_fail(struct argv_meta * meta)
{
argv_free(meta);
return -1;
}
int pe_get_driver_ctx(
const char ** argv,
const char ** envp,
uint32_t flags,
struct pe_driver_ctx ** pctx)
{
struct pe_driver_ctx * ctx;
struct argv_meta * meta;
struct argv_entry * entry;
size_t nunits;
uint64_t dflags;
uint64_t fflags;
const char * program;
const char * output;
const char * pretty;
int fdout;
if (!(meta = argv_get(argv,options,pe_argv_flags(flags))))
return -1;
dflags = 0;
fflags = 0;
output = 0;
pretty = 0;
nunits = 0;
program = argv_program_name(argv[0]);
if (!argv[1] && (flags & PERK_DRIVER_VERBOSITY_USAGE))
return pe_driver_usage(program,0,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,meta);
case TAG_VERSION:
dflags |= PERK_DRIVER_VERSION;
break;
case TAG_OUTPUT:
output = entry->arg;
break;
case TAG_PRETTY:
pretty = entry->arg;
break;
case TAG_EXPSYMS:
fflags |= PERK_OUTPUT_EXPORT_SYMS;
break;
case TAG_IMPLIBS:
fflags |= PERK_OUTPUT_IMPORT_LIBS;
break;
case TAG_IMPSYMS:
fflags |= PERK_OUTPUT_IMPORT_SYMS;
break;
}
} else
nunits++;
}
if (output && ((fdout = open(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 (!(ctx = pe_driver_ctx_alloc(meta,nunits)) && output)
close(fdout);
if (!ctx)
return pe_get_driver_ctx_fail(meta);
if (pretty && !strcmp(pretty,"yaml"))
fflags |= PERK_PRETTY_YAML;
ctx->program = program;
ctx->cctx.drvflags = dflags;
ctx->cctx.fmtflags = fflags;
ctx->cctx.output = output;
ctx->cctx.fdout = output ? fdout : -1;
ctx->cctx.fdin = -1;
ctx->cctx.fderr = -1;
ctx->cctx.fdlog = -1;
ctx->cctx.fdsrc = AT_FDCWD;
ctx->cctx.fddst = AT_FDCWD;
ctx->cctx.fdtmp = AT_FDCWD;
*pctx = ctx;
return PERK_OK;
}
static void pe_driver_close_fds(struct pe_common_ctx * cctx)
{
if (cctx->status && cctx->output)
unlinkat(cctx->fddst,cctx->output,0);
if (cctx->fdout >= 0)
close(cctx->fdout);
}
static void pe_free_driver_ctx_impl(struct pe_driver_ctx_impl * ictx)
{
if (ictx->symctx.append)
free(ictx->symctx.append);
if (ictx->symctx.exclude)
free(ictx->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_impl * ictx;
uintptr_t addr;
if (ctx) {
addr = (uintptr_t)ctx - offsetof(struct pe_driver_ctx_impl,ctx);
ictx = (struct pe_driver_ctx_impl *)addr;
pe_free_driver_ctx_impl(ictx);
}
}
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