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fis-gtm/sr_unix/iott_rdone.c

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/****************************************************************
* *
* Copyright 2001, 2013 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include <errno.h>
#include <wctype.h>
#include <wchar.h>
#include <signal.h>
#include "gtm_string.h"
#include "iotcp_select.h"
#include "io.h"
#include "iottdef.h"
#include "iott_edit.h"
#include "trmdef.h"
#include "iotimer.h"
#include "gt_timer.h"
#include "gtmio.h"
#include "eintr_wrappers.h"
#include "send_msg.h"
#include "outofband.h"
#include "error.h"
#include "std_dev_outbndset.h"
#include "wake_alarm.h"
#ifdef UNICODE_SUPPORTED
#include "gtm_icu_api.h"
#include "gtm_utf8.h"
#endif
GBLREF volatile int4 outofband;
GBLREF boolean_t dollar_zininterrupt;
GBLREF mv_stent *mv_chain;
GBLREF stack_frame *frame_pointer;
GBLREF unsigned char *msp, *stackbase, *stacktop, *stackwarn;
GBLREF io_pair io_curr_device;
GBLREF io_pair io_std_device;
GBLREF bool prin_in_dev_failure;
GBLREF int4 ctrap_action_is;
GBLREF bool out_of_time;
GBLREF boolean_t gtm_utf8_mode;
LITREF unsigned char lower_to_upper_table[];
error_def(ERR_CTRAP);
error_def(ERR_IOEOF);
error_def(ERR_NOPRINCIO);
error_def(ERR_ZINTRECURSEIO);
error_def(ERR_STACKOFLOW);
error_def(ERR_STACKCRIT);
int iott_rdone (mint *v, int4 timeout) /* timeout in seconds */
{
boolean_t ret = FALSE, timed, utf8_active, zint_restart, first_time;
unsigned char inbyte;
wint_t inchar;
#ifdef __MVS__
wint_t asc_inchar;
#endif
char dc1, dc3;
short int i;
io_desc *io_ptr;
d_tt_struct *tt_ptr;
tt_interrupt *tt_state;
TID timer_id;
int rdlen, selstat, status, utf8_more, inchar_width;
int4 msec_timeout; /* timeout in milliseconds */
uint4 mask;
int msk_in, msk_num;
unsigned char *zb_ptr, *zb_top;
unsigned char more_buf[GTM_MB_LEN_MAX + 1], *more_ptr; /* to build up multi byte for character */
fd_set input_fd;
struct timeval input_timeval;
ABS_TIME cur_time, end_time;
mv_stent *mv_zintdev;
io_ptr = io_curr_device.in;
assert (io_ptr->state == dev_open);
iott_flush(io_curr_device.out);
tt_ptr = (d_tt_struct*) io_ptr->dev_sp;
timer_id = (TID) iott_rdone;
*v = -1;
dc1 = (char) 17;
dc3 = (char) 19;
mask = tt_ptr->term_ctrl;
utf8_active = gtm_utf8_mode ? (CHSET_M != io_ptr->ichset) : FALSE;
zint_restart = FALSE;
if (tt_ptr->mupintr)
{ /* restore state to before job interrupt */
tt_state = &tt_ptr->tt_state_save;
if (ttwhichinvalid == tt_state->who_saved)
GTMASSERT;
if (dollar_zininterrupt)
{
tt_ptr->mupintr = FALSE;
tt_state->who_saved = ttwhichinvalid;
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_ZINTRECURSEIO);
}
if (ttrdone != tt_state->who_saved)
GTMASSERT; /* ZINTRECURSEIO should have caught */
mv_zintdev = io_find_mvstent(io_ptr, FALSE);
if (NULL != mv_zintdev)
{
mv_zintdev->mv_st_cont.mvs_zintdev.buffer_valid = FALSE;
mv_zintdev->mv_st_cont.mvs_zintdev.io_ptr = NULL;
if (mv_chain == mv_zintdev)
POP_MV_STENT(); /* pop if top of stack */
end_time = tt_state->end_time;
if (utf8_active)
{
utf8_more = tt_state->utf8_more;
more_ptr = tt_state->more_ptr;
memcpy(more_buf, tt_state->more_buf, SIZEOF(more_buf));
}
zb_ptr = tt_state->zb_ptr;
zb_top = tt_state->zb_top;
tt_state->who_saved = ttwhichinvalid;
tt_ptr->mupintr = FALSE;
zint_restart = TRUE;
}
}
if (!zint_restart)
{
utf8_more = 0;
/* ---------------------------------------------------------
* zb_ptr is used to fill-in the value of $zb as we go
* If we drop-out with error or otherwise permaturely,
* consider $zb to be null.
* ---------------------------------------------------------
*/
zb_ptr = io_ptr->dollar.zb;
zb_top = zb_ptr + SIZEOF(io_ptr->dollar.zb) - 1;
*zb_ptr = 0;
io_ptr->esc_state = START;
io_ptr->dollar.za = 0;
io_ptr->dollar.zeof = FALSE;
if (mask & TRM_NOTYPEAHD)
TCFLUSH(tt_ptr->fildes, TCIFLUSH, status);
if (mask & TRM_READSYNC)
{
DOWRITERC(tt_ptr->fildes, &dc1, 1, status);
if (0 != status)
{
io_ptr->dollar.za = 9;
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) status);
}
}
}
out_of_time = FALSE;
if (timeout == NO_M_TIMEOUT)
{
timed = FALSE;
input_timeval.tv_sec = 100;
msec_timeout = NO_M_TIMEOUT;
} else
{
timed = TRUE;
input_timeval.tv_sec = timeout;
msec_timeout = timeout2msec(timeout);
if (0 == msec_timeout)
{
if (!zint_restart)
iott_mterm(io_ptr);
} else
{
sys_get_curr_time(&cur_time);
if (!zint_restart)
add_int_to_abs_time(&cur_time, msec_timeout, &end_time);
}
}
input_timeval.tv_usec = 0;
first_time = TRUE;
do
{
if (outofband)
{
if (jobinterrupt == outofband)
{ /* save state if jobinterrupt */
tt_state = &tt_ptr->tt_state_save;
tt_state->exp_length = 0;
tt_state->who_saved = ttrdone;
tt_state->end_time = end_time;
if (utf8_active)
{
tt_state->utf8_more = utf8_more;
tt_state->more_ptr = more_ptr;
memcpy(tt_state->more_buf, more_buf, SIZEOF(more_buf));
}
tt_state->zb_ptr = zb_ptr;
tt_state->zb_top = zb_top;
PUSH_MV_STENT(MVST_ZINTDEV); /* used as a flag only */
mv_chain->mv_st_cont.mvs_zintdev.buffer_valid = FALSE;
mv_chain->mv_st_cont.mvs_zintdev.io_ptr = io_ptr;
tt_ptr->mupintr = TRUE;
} else
{
if (timed && (0 == msec_timeout))
iott_rterm(io_ptr);
}
outofband_action(FALSE);
break;
}
if (!first_time)
{
if (timed)
{
if (0 != msec_timeout)
{
sys_get_curr_time(&cur_time);
cur_time = sub_abs_time(&end_time, &cur_time);
if (0 > cur_time.at_sec)
{
ret = FALSE;
break;
}
input_timeval.tv_sec = cur_time.at_sec;
input_timeval.tv_usec = (gtm_tv_usec_t)cur_time.at_usec;
}
} else
{ /* This is an untimed read. We had set the select timeout to be 100 seconds by default. But since
* "select" changes the timeout (in Linux) to account for the elapsed wait time, we need to reset
* the timeout to be 100 seconds (else multiple iterations of this for loop could cause it to be
* reset to 0 causing a CPU spin loop).
*/
input_timeval.tv_sec = 100;
}
} else
first_time = FALSE;
FD_ZERO(&input_fd);
FD_SET(tt_ptr->fildes, &input_fd);
assert(FD_ISSET(tt_ptr->fildes, &input_fd) != 0);
/* the checks for EINTR below are valid and should not be converted to EINTR
* wrapper macros, since the select/read is not retried on EINTR.
*/
selstat = select(tt_ptr->fildes + 1, (void *)&input_fd, (void *)NULL, (void *)NULL, &input_timeval);
if (0 > selstat)
{
if (EINTR != errno)
{
io_ptr->dollar.za = 9;
if (timed && (0 == msec_timeout))
iott_rterm(io_ptr);
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) errno);
break;
}
} else if (0 == selstat)
{
if (timed)
{
wake_alarm(); /* sets out_of_time to be true for zero as well as non-zero timeouts */
break;
}
continue; /* select() timeout; try again */
} else if ((rdlen = (int)(read(tt_ptr->fildes, &inbyte, 1))) == 1) /* This read is protected */
{
assert(FD_ISSET(tt_ptr->fildes, &input_fd) != 0);
/* --------------------------------------------------
* set prin_in_dev_failure to FALSE to indicate that
* input device is working now.
* --------------------------------------------------
*/
prin_in_dev_failure = FALSE;
#ifdef UNICODE_SUPPORTED
if (utf8_active)
{
if (tt_ptr->discard_lf)
{ /* saw CR last time so ignore following LF */
tt_ptr->discard_lf = FALSE;
if (NATIVE_LF == inbyte)
continue;
}
if (utf8_more)
{ /* needed extra bytes */
*more_ptr++ = inbyte;
if (--utf8_more)
continue; /* get next byte */
UTF8_MBTOWC(more_buf, more_ptr, inchar);
if (WEOF == inchar)
{ /* invalid char */
io_ptr->dollar.za = 9;
/* No data to return */
iott_readfl_badchar(NULL, NULL, 0,
(int)((more_ptr - more_buf)), more_buf, more_ptr, NULL);
utf8_badchar((int)(more_ptr - more_buf), more_buf, more_ptr, 0, NULL); /* BADCHAR */
break;
}
} else
{
more_ptr = more_buf;
if (0 < (utf8_more = UTF8_MBFOLLOW(&inbyte))) /* assignment */
{
if ((0 > utf8_more) || (GTM_MB_LEN_MAX < utf8_more))
{ /* invalid character */
io_ptr->dollar.za = 9;
*more_ptr++ = inbyte;
/* No data to return */
iott_readfl_badchar(NULL, NULL, 0, 1, more_buf, more_ptr, NULL);
utf8_badchar(1, more_buf, more_ptr, 0, NULL); /* ERR_BADCHAR */
break;
} else
{
*more_ptr++ = inbyte;
continue; /* get next byte */
}
} else
{ /* single byte */
*more_ptr++ = inbyte;
UTF8_MBTOWC(more_buf, more_ptr, inchar);
if (WEOF == inchar)
{ /* invalid char */
io_ptr->dollar.za = 9;
/* No data to return */
iott_readfl_badchar(NULL, NULL, 0, 1, more_buf, more_ptr, NULL);
utf8_badchar(1, more_buf, more_ptr, 0, NULL); /* ERR_BADCHAR */
break;
}
}
}
if (mask & TRM_CONVERT)
inchar = u_toupper(inchar);
GTM_IO_WCWIDTH(inchar, inchar_width);
} else
{
#endif
if (mask & TRM_CONVERT)
NATIVE_CVT2UPPER(inbyte, inbyte);
inchar = inbyte;
inchar_width = 1;
#ifdef UNICODE_SUPPORTED
}
#endif
GETASCII(asc_inchar, inchar);
if (INPUT_CHAR < ' ' && ((1 << INPUT_CHAR) & tt_ptr->enbld_outofbands.mask))
{
std_dev_outbndset(INPUT_CHAR);
if (timed)
{
if (0 == msec_timeout)
iott_rterm(io_ptr);
}
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(3) ERR_CTRAP, 1, ctrap_action_is);
ret = FALSE;
break;
}
else if ( ((mask & TRM_ESCAPE) != 0)
&& (inchar == NATIVE_ESC || io_ptr->esc_state != START))
{
*v = INPUT_CHAR;
ret = FALSE;
do
{
if (zb_ptr >= zb_top UNICODE_ONLY(|| (utf8_active && ASCII_MAX < inchar)))
{
/* -------------
* $zb overflow
* -------------
*/
io_ptr->dollar.za = 2;
break;
}
*zb_ptr++ = (unsigned char)inchar;
iott_escape(zb_ptr - 1, zb_ptr, io_ptr);
/* RESTORE_DOLLARZB(asc_inchar); */
*(zb_ptr - 1) = (unsigned char)INPUT_CHAR; /* need to store ASCII value */
if (io_ptr->esc_state == FINI)
{
ret = TRUE;
break;
}
if (io_ptr->esc_state == BADESC)
{
/* ------------------------------
* Escape sequence failed parse.
* ------------------------------
*/
io_ptr->dollar.za = 2;
break;
}
DOREADRL(tt_ptr->fildes, &inbyte, 1, rdlen);
inchar = inbyte;
GETASCII(asc_inchar, inchar);
} while (1 == rdlen);
*zb_ptr++ = 0;
if (rdlen != 1 && io_ptr->dollar.za == 0)
io_ptr->dollar.za = 9;
/* -------------------------------------------------
* End of escape sequence...do not process further.
* -------------------------------------------------
*/
break;
}
else
{
/* may need to deal with terminators > ASCII_MAX and/or LS and PS if default_mask_term */
ret = TRUE;
if (!utf8_active || ASCII_MAX >= INPUT_CHAR)
{
msk_num = (uint4)INPUT_CHAR / NUM_BITS_IN_INT4;
msk_in = (1 << ((uint4)INPUT_CHAR % NUM_BITS_IN_INT4));
} else
msk_num = msk_in = 0; /* force to not match terminator */
if ((!(msk_in & tt_ptr->mask_term.mask[msk_num])) && (!(mask & TRM_NOECHO)))
{
status = iott_write_raw(tt_ptr->fildes,
utf8_active ? (void *)&inchar : (void *)&inbyte, 1);
if (0 >= status)
{
status = errno;
io_ptr->dollar.za = 9;
if (timed)
{
if (0 == msec_timeout)
iott_rterm(io_ptr);
}
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) status);
}
}
break;
}
} else if (rdlen < 0)
{
if (errno != EINTR)
{
io_ptr->dollar.za = 9;
if (timed && (0 == msec_timeout))
iott_rterm(io_ptr);
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) errno);
break;
}
} else
/* ------------
* rdlen == 0
* ------------
*/
{ /* ---------------------------------------------------------
* select() says there's something to read, but
* read() found zero characters; assume connection dropped.
* ---------------------------------------------------------
*/
if (io_curr_device.in == io_std_device.in)
{
if (!prin_in_dev_failure)
prin_in_dev_failure = TRUE;
else
{
send_msg_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_NOPRINCIO);
stop_image_no_core();
}
}
if (io_ptr->dollar.zeof)
{
io_ptr->dollar.za = 9;
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_IOEOF);
} else
{
io_ptr->dollar.zeof = TRUE;
io_ptr->dollar.za = 0;
if (io_ptr->error_handler.len > 0)
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) ERR_IOEOF);
}
break;
}
} while (!out_of_time);
if (timed)
{
if (0 == msec_timeout)
iott_rterm(io_ptr);
}
if (mask & TRM_READSYNC)
{
DOWRITERC(tt_ptr->fildes, &dc3, 1, status);
if (0 != status)
{
io_ptr->dollar.za = 9;
rts_error_csa(CSA_ARG(NULL) VARLSTCNT(1) status);
}
}
if (outofband && jobinterrupt != outofband)
{
io_ptr->dollar.za = 9;
return FALSE;
}
io_ptr->dollar.za = 0;
if (ret && io_ptr->esc_state != FINI)
{
*v = INPUT_CHAR;
if ((TT_EDITING & tt_ptr->ext_cap) && !((TRM_PASTHRU|TRM_NOECHO) & mask))
{ /* keep above test in sync with iott_readfl */
assert(tt_ptr->recall_buff.addr);
if (!utf8_active)
{
tt_ptr->recall_buff.addr[0] = INPUT_CHAR;
tt_ptr->recall_buff.len = 1;
}
#ifdef UNICODE_SUPPORTED
else
{
memcpy(tt_ptr->recall_buff.addr, &INPUT_CHAR, SIZEOF(INPUT_CHAR));
tt_ptr->recall_buff.len = SIZEOF(INPUT_CHAR);
}
#endif
tt_ptr->recall_width = inchar_width;
}
/* SIMPLIFY THIS! */
if (!utf8_active || ASCII_MAX >= INPUT_CHAR)
{ /* may need changes to allow terminator > MAX_ASCII and/or LS and PS if default_mask_term */
msk_num = (uint4)INPUT_CHAR / NUM_BITS_IN_INT4;
msk_in = (1 << ((uint4)INPUT_CHAR % NUM_BITS_IN_INT4));
} else
msk_num = msk_in = 0; /* force no match to terminator */
if (msk_in & tt_ptr->mask_term.mask[msk_num])
{
*zb_ptr++ = INPUT_CHAR;
*zb_ptr++ = 0;
}
else
io_ptr->dollar.zb[0] = '\0';
if ((!(msk_in & tt_ptr->mask_term.mask[msk_num])) && (!(mask & TRM_NOECHO)))
{
if ((io_ptr->dollar.x += inchar_width) >= io_ptr->width && io_ptr->wrap)
{
++(io_ptr->dollar.y);
if (io_ptr->length)
io_ptr->dollar.y %= io_ptr->length;
io_ptr->dollar.x %= io_ptr->width;
if (io_ptr->dollar.x == 0)
DOWRITE(tt_ptr->fildes, NATIVE_TTEOL, STRLEN(NATIVE_TTEOL));
}
}
}
memcpy(io_ptr->dollar.key, io_ptr->dollar.zb, (zb_ptr - io_ptr->dollar.zb));
return ret;
}
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