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authorRoberto E. Vargas Caballero <k0ga@shike2.com>2015-04-13 19:03:53 +0200
committerRoberto E. Vargas Caballero <k0ga@shike2.com>2015-04-15 10:52:44 +0200
commit215bdb2da3eca77ba01b70503c527baaad67c359 (patch)
treed3d8ea65fb4496e9a26ebc55a898bc34ca37e5a8 /st.c
parent56abffb4b67f235d20de30f29ba027ab34c171e3 (diff)
downloadst-215bdb2da3eca77ba01b70503c527baaad67c359.tar.gz
st-215bdb2da3eca77ba01b70503c527baaad67c359.tar.bz2
Add tty line support
Not always is desirable to create a pseudo terminal, and some times we want to open a terminal emulator over a tty line. With this new patch is possible to do someting like: $ st -l /dev/ttyS0 115200 Without this option was needed to launch another terminal emulator over st (for example minicom, picocom, cu, ...).
Diffstat (limited to 'st.c')
-rw-r--r--st.c66
1 files changed, 54 insertions, 12 deletions
diff --git a/st.c b/st.c
index bb8c365..d22c605 100644
--- a/st.c
+++ b/st.c
@@ -352,6 +352,7 @@ static void draw(void);
static void redraw(void);
static void drawregion(int, int, int, int);
static void execsh(void);
+static void stty(void);
static void sigchld(int);
static void run(void);
@@ -508,6 +509,7 @@ static char *opt_title = NULL;
static char *opt_embed = NULL;
static char *opt_class = NULL;
static char *opt_font = NULL;
+static char *opt_line = NULL;
static int oldbutton = 3; /* button event on startup: 3 = release */
static char *usedfont = NULL;
@@ -1253,11 +1255,55 @@ sigchld(int a) {
exit(EXIT_SUCCESS);
}
+
+void
+stty(void)
+{
+ char cmd[_POSIX_ARG_MAX], **p, *q, *s;
+ size_t n, siz;
+
+ if((n = strlen(stty_args)) > sizeof(cmd)-1)
+ die("incorrect stty parameters\n");
+ memcpy(cmd, stty_args, n);
+ q = cmd + n;
+ siz = sizeof(cmd) - n;
+ for(p = opt_cmd; p && (s = *p); ++p) {
+ if((n = strlen(s)) > siz-1)
+ die("stty parameter length too long\n");
+ *q++ = ' ';
+ q = memcpy(q, s, n);
+ q += n;
+ siz-= n + 1;
+ }
+ *q = '\0';
+ system(cmd);
+}
+
void
ttynew(void) {
int m, s;
struct winsize w = {term.row, term.col, 0, 0};
+ if(opt_io) {
+ term.mode |= MODE_PRINT;
+ iofd = (!strcmp(opt_io, "-")) ?
+ STDOUT_FILENO :
+ open(opt_io, O_WRONLY | O_CREAT, 0666);
+ if(iofd < 0) {
+ fprintf(stderr, "Error opening %s:%s\n",
+ opt_io, strerror(errno));
+ }
+ }
+
+ if (opt_line) {
+ if((cmdfd = open(opt_line, O_RDWR)) < 0)
+ die("open line failed: %s\n", strerror(errno));
+ close(STDIN_FILENO);
+ dup(cmdfd);
+ stty();
+ return;
+ }
+
/* seems to work fine on linux, openbsd and freebsd */
if(openpty(&m, &s, NULL, NULL, &w) < 0)
die("openpty failed: %s\n", strerror(errno));
@@ -1267,6 +1313,7 @@ ttynew(void) {
die("fork failed\n");
break;
case 0:
+ close(iofd);
setsid(); /* create a new process group */
dup2(s, STDIN_FILENO);
dup2(s, STDOUT_FILENO);
@@ -1281,16 +1328,6 @@ ttynew(void) {
close(s);
cmdfd = m;
signal(SIGCHLD, sigchld);
- if(opt_io) {
- term.mode |= MODE_PRINT;
- iofd = (!strcmp(opt_io, "-")) ?
- STDOUT_FILENO :
- open(opt_io, O_WRONLY | O_CREAT, 0666);
- if(iofd < 0) {
- fprintf(stderr, "Error opening %s:%s\n",
- opt_io, strerror(errno));
- }
- }
break;
}
}
@@ -4009,9 +4046,11 @@ run(void) {
void
usage(void) {
- die("%s " VERSION " (c) 2010-2015 st engineers\n" \
+ die("%s " VERSION " (c) 2010-2015 st engineers\n"
"usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
- " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n",
+ " [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
+ " st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
+ " [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
argv0);
}
@@ -4047,6 +4086,9 @@ main(int argc, char *argv[]) {
case 'o':
opt_io = EARGF(usage());
break;
+ case 'l':
+ opt_line = EARGF(usage());
+ break;
case 't':
opt_title = EARGF(usage());
break;