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Add option to send an initstring before dropping to the main loop

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This commit is contained in:
Maciej Grela
2017-03-20 22:47:46 +01:00
parent deffd18c24
commit a1cc4f9128
2 changed files with 20 additions and 1 deletions
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8
picocom.1.md
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@ -282,6 +282,14 @@ Picocom accepts the following command-line options.
mapping is performed) is also logged to the same file. (Default:
no logging)
**--initstring** | **-t**
: Send the provided string after opening the serial port. This
feature is useful for example if the serial device needs some
special magic strings to start responding. Use $(echo -e ...)
or xxd to generate special characters like a CR or binary data.
Note, that the initial string is not sent if **--noinit** is set.
**--lower-rts**
: Lower the RTS control signal after opening the serial port (by

13
picocom.c
View File

@ -191,6 +191,7 @@ struct {
int omap;
int emap;
char *log_filename;
char *initstring;
int lower_rts;
int lower_dtr;
} opts = {
@ -213,6 +214,7 @@ struct {
.omap = M_O_DFL,
.emap = M_E_DFL,
.log_filename = NULL,
.initstring = NULL,
.lower_rts = 0,
.lower_dtr = 0
};
@ -1310,6 +1312,7 @@ show_usage(char *name)
printf(" --omap <map> (output mappings)\n");
printf(" --emap <map> (local-echo mappings)\n");
printf(" --lo<g>file <filename>\n");
printf(" --inits<t>ring <s>\n");
printf(" --lower-rts\n");
printf(" --lower-dtr\n");
printf(" --<h>elp\n");
@ -1354,6 +1357,7 @@ parse_args(int argc, char *argv[])
{"databits", required_argument, 0, 'd'},
{"stopbits", required_argument, 0, 'p'},
{"logfile", required_argument, 0, 'g'},
{"initstring", required_argument, 0, 't'},
{"lower-rts", no_argument, 0, 'R'},
{"lower-dtr", no_argument, 0, 'D'},
{"help", no_argument, 0, 'h'},
@ -1369,7 +1373,7 @@ parse_args(int argc, char *argv[])
/* no default error messages printed. */
opterr = 0;
c = getopt_long(argc, argv, "hirlcv:s:r:e:f:b:y:d:p:g:",
c = getopt_long(argc, argv, "hirlcv:s:r:e:f:b:y:d:p:g:t:",
longOptions, &optionIndex);
if (c < 0)
@ -1497,6 +1501,9 @@ parse_args(int argc, char *argv[])
case 'g':
opts.log_filename = strdup(optarg);
break;
case 't':
opts.initstring = strdup(optarg);
break;
case 'R':
opts.lower_rts = 1;
break;
@ -1617,6 +1624,10 @@ main(int argc, char *argv[])
opts.flow, /* flow control. */
1, /* local or modem */
!opts.noreset); /* hup-on-close. */
if (opts.initstring) {
write(tty_fd, opts.initstring, strlen(opts.initstring));
}
}
if ( r < 0 )
fatal("failed to add device %s: %s",