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/**************************************************************/
/* tpax: a topological pax implementation */
/* Copyright (C) 2020--2024 SysDeer Technologies, LLC */
/* Released under GPLv2 and GPLv3; see COPYING.TPAX. */
/**************************************************************/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <tpax/tpax.h>
#include "tpax_driver_impl.h"
#include "tpax_dprintf_impl.h"
static const char aclr_reset[] = "\x1b[0m";
static const char aclr_bold[] = "\x1b[1m";
static const char aclr_red[] = "\x1b[31m";
static const char aclr_green[] = "\x1b[32m";
static const char aclr_blue[] = "\x1b[34m";
static const char aclr_magenta[] = "\x1b[35m";
static const char * const tpax_error_strings[TPAX_ERR_CAP] = {
[TPAX_ERR_FLOW_ERROR] = "flow error: unexpected condition or other",
[TPAX_ERR_FLEE_ERROR] = "flees and bugs and cats and mice",
[TPAX_ERR_NULL_CONTEXT] = "null driver or unit context",
[TPAX_ERR_BAD_DATA] = "corrupt or wrong daata",
[TPAX_ERR_FILE_CHANGED] = "file has changed",
[TPAX_ERR_REGION_SIZE] = "file too large for a memory snapshot",
};
static const char * tpax_output_error_header(const struct tpax_error_info * erri)
{
if (erri->eflags & TPAX_ERROR_CHILD)
return "exec error upon";
else if (erri->eflags & TPAX_ERROR_TOP_LEVEL)
return "error logged in";
else if (erri->eflags & TPAX_ERROR_NESTED)
return "< returned to >";
else
return "distorted state";
}
static const char * tpax_output_unit_header(const struct tpax_error_info * erri)
{
if (!(erri->eflags & TPAX_ERROR_CUSTOM))
return "while opening";
else
return "while parsing";
}
static const char * tpax_output_strerror(
const struct tpax_error_info * erri,
char (*errbuf)[256])
{
if (erri->eflags & TPAX_ERROR_CUSTOM)
return ((erri->elibcode < 0) || (erri->elibcode >= TPAX_ERR_CAP))
? "internal error: please report to the maintainer"
: tpax_error_strings[erri->elibcode];
else if (erri->eflags & TPAX_ERROR_NESTED)
return "";
else if (erri->eflags & TPAX_ERROR_CHILD)
return "(see child process error messages)";
else if (erri->esyscode == ENOBUFS)
return "input error: string length exceeds buffer size";
else
return strerror_r(erri->esyscode,*errbuf,sizeof(*errbuf))
? "internal error: strerror_r(3) call failed"
: *errbuf;
}
static int tpax_output_error_record_plain(
const struct tpax_driver_ctx * dctx,
const struct tpax_error_info * erri)
{
const char * epath;
char errbuf[256];
int fderr = tpax_driver_fderr(dctx);
const char * errdesc = tpax_output_strerror(erri,&errbuf);
epath = erri->euctx
? *erri->euctx->path
: erri->eunit;
if (epath && !(erri->eflags & TPAX_ERROR_NESTED))
if (tpax_dprintf(
fderr,
"%s: [%s] '%s':\n",
dctx->program,
tpax_output_unit_header(erri),
epath) < 0)
return -1;
if (tpax_dprintf(
fderr,
"%s: %s %s(), line %d%s%s.\n",
dctx->program,
tpax_output_error_header(erri),
erri->efunction,
erri->eline,
strlen(errdesc) ? ": " : "",
errdesc) < 0)
return -1;
return 0;
}
static int tpax_output_error_record_annotated(
const struct tpax_driver_ctx * dctx,
const struct tpax_error_info * erri)
{
const char * epath;
char errbuf[256];
int fderr = tpax_driver_fderr(dctx);
const char * errdesc = tpax_output_strerror(erri,&errbuf);
epath = erri->euctx
? *erri->euctx->path
: erri->eunit;
if (epath && !(erri->eflags & TPAX_ERROR_NESTED))
if (tpax_dprintf(
fderr,
"%s%s%s:%s %s[%s]%s %s%s'%s'%s:\n",
aclr_bold,aclr_magenta,
dctx->program,
aclr_reset,
aclr_bold,
tpax_output_unit_header(erri),
aclr_reset,
aclr_bold,aclr_red,
epath,
aclr_reset) < 0)
return -1;
if (tpax_dprintf(
fderr,
"%s%s%s:%s %s%s%s %s%s%s()%s, %s%sline %d%s%s%s%s%s.\n",
aclr_bold,aclr_magenta,
dctx->program,
aclr_reset,
aclr_bold,
tpax_output_error_header(erri),
aclr_reset,
aclr_bold,aclr_blue,
erri->efunction,
aclr_reset,
aclr_bold,aclr_green,
erri->eline,
aclr_reset,
strlen(errdesc) ? ": " : "",
aclr_bold,
errdesc,
aclr_reset) < 0)
return -1;
return 0;
}
int tpax_output_error_record(
const struct tpax_driver_ctx * dctx,
const struct tpax_error_info * erri)
{
if (dctx->cctx->drvflags & TPAX_DRIVER_ANNOTATE_NEVER)
return tpax_output_error_record_plain(dctx,erri);
else if (dctx->cctx->drvflags & TPAX_DRIVER_ANNOTATE_ALWAYS)
return tpax_output_error_record_annotated(dctx,erri);
else if (isatty(tpax_driver_fderr(dctx)))
return tpax_output_error_record_annotated(dctx,erri);
else
return tpax_output_error_record_plain(dctx,erri);
}
static int tpax_output_error_vector_plain(const struct tpax_driver_ctx * dctx)
{
struct tpax_error_info ** perr;
for (perr=dctx->errv; *perr; perr++)
if (tpax_output_error_record_plain(dctx,*perr))
return -1;
return 0;
}
static int tpax_output_error_vector_annotated(const struct tpax_driver_ctx * dctx)
{
struct tpax_error_info ** perr;
for (perr=dctx->errv; *perr; perr++)
if (tpax_output_error_record_annotated(dctx,*perr))
return -1;
return 0;
}
int tpax_output_error_vector(const struct tpax_driver_ctx * dctx)
{
if (dctx->cctx->drvflags & TPAX_DRIVER_ANNOTATE_NEVER)
return tpax_output_error_vector_plain(dctx);
else if (dctx->cctx->drvflags & TPAX_DRIVER_ANNOTATE_ALWAYS)
return tpax_output_error_vector_annotated(dctx);
else if (isatty(tpax_driver_fderr(dctx)))
return tpax_output_error_vector_annotated(dctx);
else
return tpax_output_error_vector_plain(dctx);
}
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