github.com/rricharz.Tek4010
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Code Issues Releases Wiki Activity

debug facility of esc sequences, use SHELL

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This commit is contained in:
Rene Richarz
2026-05-08 10:17:27 +02:00
parent af52982a57
commit dba12b8a01
1 changed files with 117 additions and 27 deletions
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144
src/tube.c
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@@ -155,6 +155,78 @@ int childExited = 0;
static void tube_set_source_rgb(cairo_t *cr, double intensity, double saturation);
// debug esc support facility
#define ESCDEBUG_LEN 16
static int argEscDebug = 0;
static int escDebugActive = 0;
static int escDebugCount = 0;
static int escDebugBuf[ESCDEBUG_LEN];
static void escdebug_print_char(int ch)
{
ch &= 0xff;
if (ch == 27)
printf("<ESC>");
else if (ch == 7)
printf("<BEL>");
else if (ch == '\r')
printf("<CR>");
else if (ch == '\n')
printf("<LF>");
else if ((ch >= 32) && (ch < 127))
putchar(ch);
else
printf("<%02X>", ch);
}
void escdebug_print(void)
{
int i;
printf("ESCDEBUG: ");
for (i = 0; i < escDebugCount; i++)
escdebug_print_char(escDebugBuf[i]);
printf("\n");
fflush(stdout);
}
void escdebug_char(int ch)
{
if (!argEscDebug)
return;
ch &= 0xff;
if (ch == 27) {
if (escDebugActive && escDebugCount > 0)
escdebug_print();
escDebugActive = 1;
escDebugCount = 0;
escDebugBuf[escDebugCount++] = ch;
return;
}
if (!escDebugActive)
return;
if (escDebugCount < ESCDEBUG_LEN)
escDebugBuf[escDebugCount++] = ch;
if ((ch == '\r') || (ch == '\n') ||
(escDebugCount >= ESCDEBUG_LEN)) {
escdebug_print();
escDebugActive = 0;
escDebugCount = 0;
}
}
// helpers for timing
long tube_mSeconds()
// return time in msec since start of program
{
@@ -225,7 +297,10 @@ int tube_getInputChar()
int c = getc(getData) & 0x7F;
charCount++;
charResetCount++;
lastTime = t;
lastTime = t;
escdebug_char(c);
return c;
}
else
@@ -404,6 +479,8 @@ void tube_init(int argc, char* argv[])
}
else if (strcmp(argv[firstArg],"-half") == 0)
argHalf = 1;
else if (strcmp(argv[firstArg],"-escdebug") == 0)
argEscDebug = 1;
else {
printf("tek4010: unknown argument %s\n", argv[firstArg]);
exit(1);
@@ -467,37 +544,50 @@ void tube_init(int argc, char* argv[])
printf("Cannot fork pseudo terminal\n");
exit(1);
}
else if (pid == 0) {
setenv("TERM", "tek4014", 1);
else if (pid == 0) {
if (argPty) {
char *shell;
// configure local sh for Tektronix-style line editing
struct termios tio;
if (tcgetattr(STDIN_FILENO, &tio) == 0) {
#ifdef ECHOCTL
tio.c_lflag &= ~ECHOCTL;
#endif
tio.c_lflag |= ECHOE;
tio.c_cc[VERASE] = 0x08;
tcsetattr(STDIN_FILENO, TCSANOW, &tio);
}
// setenv("PS1", "tek4010$ ", 1);
execl("/bin/sh", "sh", "-i", (char *) NULL);
}
else {
// we need a second string array with an empty string as last item!
argv2[0] = argv[firstArg];
for (int i = 1; i < argc; i++)
argv2[i] = argv[firstArg + i - 1];
argv2[argc - firstArg + 1] = (char*) NULL;
setenv("TERM", "tek4014", 1);
execv(argv2[0], argv2 + 1);
if (argPty) {
shell = getenv("SHELL");
if ((shell == NULL) || (shell[0] == 0) ||
(strstr(shell, "zsh") != NULL))
shell = "/bin/sh";
// configure default shell for Tektronix-style line editing
struct termios tio;
if (tcgetattr(STDIN_FILENO, &tio) == 0) {
#ifdef ECHOCTL
tio.c_lflag &= ~ECHOCTL;
#endif
tio.c_lflag |= ECHOE;
tio.c_cc[VERASE] = 0x08;
tcsetattr(STDIN_FILENO, TCSANOW, &tio);
}
_exit(127);
}
char *shell_argv[] = { shell, "-i", NULL };
execvp(shell, shell_argv);
}
else {
// we need a second string array with an empty string as last item!
argv2[0] = argv[firstArg];
for (int i = 1; i < argc; i++)
argv2[i] = argv[firstArg + i - 1];
argv2[argc - firstArg + 1] = (char*) NULL;
execv(argv2[0], argv2 + 1);
}
_exit(127);
}
// parent process