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/* $OpenBSD: log.c,v 1.5 2019/06/12 18:21:07 lum Exp $ */
/*
* This file is in the public domain.
*
* Author: Mark Lumsden <mark@showcomplex.com>
*
*/
/*
* Record a history of an mg session for temporal debugging.
* Sometimes pressing a key will set the scene for a bug only visible
* dozens of keystrokes later. gdb has its limitations in this scenario.
*
* Note this file is not compiled into mg by default, you will need to
* amend the 'Makefile' for that to happen. Because of this, the code
* is subjet to bit-rot. However, I know myself and others have
* written similar functionally often enough, that recording the below
* in a code repository could aid the developement efforts of mg, even
* if it requires a bit of effort to get working. The current code is
* written in the spirit of debugging (quickly and perhaps not ideal,
* but it does what is required well enough). Should debugging become
* more formalised within mg, then I would expect that to change.
*/
#include <sys/queue.h>
#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "def.h"
#include "log.h"
#include "funmap.h"
char *mglogfiles_create(char *);
int mglog_lines(PF);
int mglog_undo(void);
char *mglogdir;
extern char *mglogpath_lines;
extern char *mglogpath_undo;
int mgloglevel;
int
mglog(PF funct)
{
if(!mglog_lines(funct))
ewprintf("Problem logging lines");
if(!mglog_undo())
ewprintf("Problem logging undo");
return (TRUE);
}
int
mglog_undo(void)
{
struct undo_rec *rec;
struct stat sb;
FILE *fd;
char buf[4096], tmp[1024];
int num;
char *jptr;
jptr = "^J"; /* :) */
if(stat(mglogpath_undo, &sb))
return (FALSE);
fd = fopen(mglogpath_undo, "a");
/*
* From undo_dump()
*/
num = 0;
TAILQ_FOREACH(rec, &curbp->b_undo, next) {
num++;
if (fprintf(fd, "%d:\t %s at %d ", num,
(rec->type == DELETE) ? "DELETE":
(rec->type == DELREG) ? "DELREGION":
(rec->type == INSERT) ? "INSERT":
(rec->type == BOUNDARY) ? "----" :
(rec->type == MODIFIED) ? "MODIFIED": "UNKNOWN",
rec->pos) == -1) {
fclose(fd);
return (FALSE);
}
if (rec->content) {
(void)strlcat(buf, "\"", sizeof(buf));
snprintf(tmp, sizeof(tmp), "%.*s",
*rec->content == '\n' ? 2 : rec->region.r_size,
*rec->content == '\n' ? jptr : rec->content);
(void)strlcat(buf, tmp, sizeof(buf));
(void)strlcat(buf, "\"", sizeof(buf));
}
snprintf(tmp, sizeof(tmp), " [%d]", rec->region.r_size);
if (strlcat(buf, tmp, sizeof(buf)) >= sizeof(buf)) {
dobeep();
ewprintf("Undo record too large. Aborted.");
return (FALSE);
}
if (fprintf(fd, "%s\n", buf) == -1) {
fclose(fd);
return (FALSE);
}
tmp[0] = buf[0] = '\0';
}
if (fprintf(fd, "\t [end-of-undo]\n\n") == -1) {
fclose(fd);
return (FALSE);
}
fclose(fd);
return (TRUE);
}
int
mglog_lines(PF funct)
{
struct line *lp;
struct stat sb;
char *curline, *tmp, o;
FILE *fd;
int i;
i = 0;
if(stat(mglogpath_lines, &sb))
return (FALSE);
fd = fopen(mglogpath_lines, "a");
if (fprintf(fd, "%s\n", function_name(funct)) == -1) {
fclose(fd);
return (FALSE);
}
lp = bfirstlp(curbp);
for(;;) {
i++;
curline = " ";
o = ' ';
if (i == curwp->w_dotline) {
curline = ">";
if (lp->l_used > 0 && curwp->w_doto < lp->l_used)
o = lp->l_text[curwp->w_doto];
else
o = '-';
}
if (lp->l_size == 0)
tmp = " ";
else
tmp = lp->l_text;
if (fprintf(fd, "%s%p b^%p f.%p %d %d\t%c|%s\n", curline,
lp, lp->l_bp, lp->l_fp,
lp->l_size, lp->l_used, o, tmp) == -1) {
fclose(fd);
return (FALSE);
}
lp = lforw(lp);
if (lp == curbp->b_headp) {
if (fprintf(fd, " %p b^%p f.%p [bhead]\n(EOB)\n",
lp, lp->l_bp, lp->l_fp) == -1) {
fclose(fd);
return (FALSE);
}
if (fprintf(fd, "lines:raw:%d buf:%d wdot:%d\n\n",
i, curbp->b_lines, curwp->w_dotline) == -1) {
fclose(fd);
return (FALSE);
}
break;
}
}
fclose(fd);
return (TRUE);
}
/*
* Make sure logging to log files can happen.
*/
int
mgloginit(void)
{
struct stat sb;
mode_t dir_mode, f_mode, oumask;
char *mglogfile_lines, *mglogfile_undo;
mglogdir = "./log/";
mglogfile_lines = "line.log";
mglogfile_undo = "undo.log";
/*
* Change mgloglevel for desired level of logging.
* log.h has relevant level info.
*/
mgloglevel = 1;
oumask = umask(0);
f_mode = 0777& ~oumask;
dir_mode = f_mode | S_IWUSR | S_IXUSR;
if(stat(mglogdir, &sb)) {
if (mkdir(mglogdir, dir_mode) != 0)
return (FALSE);
if (chmod(mglogdir, f_mode) < 0)
return (FALSE);
}
mglogpath_lines = mglogfiles_create(mglogfile_lines);
if (mglogpath_lines == NULL)
return (FALSE);
mglogpath_undo = mglogfiles_create(mglogfile_undo);
if (mglogpath_undo == NULL)
return (FALSE);
return (TRUE);
}
char *
mglogfiles_create(char *mglogfile)
{
struct stat sb;
char tmp[20], *tmp2;
int fd;
if (strlcpy(tmp, mglogdir, sizeof(tmp)) >
sizeof(tmp))
return (NULL);
if (strlcat(tmp, mglogfile, sizeof(tmp)) >
sizeof(tmp))
return (NULL);
if ((tmp2 = strndup(tmp, 20)) == NULL)
return (NULL);
if(stat(tmp2, &sb))
fd = open(tmp2, O_RDWR | O_CREAT | O_TRUNC, 0644);
else
fd = open(tmp2, O_RDWR | O_TRUNC, 0644);
if (fd == -1)
return (NULL);
close(fd);
return (tmp2);
}
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