use stdio(3) - st - Simple Terminal
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---
(DIR) commit a7f50ebb64892900e5b56e30c6edd83807a4040b
(DIR) parent 07d1edcd76cf8ec3f6e72e79bbc1481da77e30f7
(HTM) Author: Matthias-Christian Ott <ott@enolink.de>
Date: Mon, 25 Aug 2008 17:56:00 +0200
use stdio(3)
Diffstat:
std.c | 95 ++++++++++++++++---------------
1 file changed, 48 insertions(+), 47 deletions(-)
---
(DIR) diff --git a/std.c b/std.c
@@ -15,6 +15,7 @@
#include <sys/wait.h>
#include <ctype.h>
#include <err.h>
+#include <errno.h>
#include <fcntl.h>
#if !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
#include <pty.h>
@@ -36,15 +37,8 @@ typedef struct {
int n;
} RingBuffer;
-ttypedef struct {
- unsigned char data[BUFSIZ];
- int i, n;
- int fd;
-} ReadBuffer;
-
static void buffer(char c);
static void cmd(const char *cmdstr, ...);
-static int getch(ReadBuffer *buf);
static void getpty(void);
static void movea(int x, int y);
static void mover(int x, int y);
@@ -54,7 +48,6 @@ static void scroll(int l);
static void shell(void);
static void sigchld(int n);
static char unbuffer(void);
-static void ungetch(ReadBuffer *buf, int c);
static int cols = 80, lines = 25;
static int cx = 0, cy = 0;
@@ -63,7 +56,7 @@ static int ptm, pts;
static _Bool bold, digit, qmark;
static pid_t pid;
static RingBuffer buf;
-static ReadBuffer cmdbuf, ptmbuf;
+static FILE *fptm;
void
buffer(char c) {
@@ -86,17 +79,6 @@ cmd(const char *cmdstr, ...) {
va_end(ap);
}
-int
-getch(ReadBuffer *buf) {
- if(buf->i++ >= buf->n) {
- buf->n = read(buf->fd, buf->data, BUFSIZ);
- if(buf->n == -1)
- err(EXIT_FAILURE, "cannot read");
- buf->i = 0;
- }
- return buf->data[buf->i];
-}
-
void
movea(int x, int y) {
x = MAX(x, cols);
@@ -121,10 +103,10 @@ parseesc(void) {
int arg[16];
memset(arg, 0, LENGTH(arg));
- c = getch(&ptmbuf);
+ c = getc(fptm);
switch(c) {
case '[':
- c = getch(&ptmbuf);
+ c = getc(fptm);
for(j = 0; j < LENGTH(arg);) {
if(isdigit(c)) {
digit = 1;
@@ -146,7 +128,7 @@ parseesc(void) {
}
break;
}
- c = getch(&ptmbuf);
+ c = getc(fptm);
}
switch(c) {
case '@':
@@ -220,7 +202,7 @@ parseesc(void) {
break;
default:
putchar('\033');
- ungetch(&ptmbuf, c);
+ ungetc(c, fptm);
}
}
@@ -308,13 +290,6 @@ unbuffer(void) {
return c;
}
-void
-ungetch(ReadBuffer *buf, int c) {
- if(buf->i + 1 >= buf->n)
- errx(EXIT_FAILURE, "buffer full");
- buf->data[buf->i++] = c;
-}
-
int
main(int argc, char *argv[]) {
fd_set rfds;
@@ -325,28 +300,31 @@ main(int argc, char *argv[]) {
errx(EXIT_FAILURE, "usage: std [-v]");
getpty();
shell();
- cmdbuf.fd = STDIN_FILENO;
- ptmbuf.fd = ptm;
FD_ZERO(&rfds);
FD_SET(STDIN_FILENO, &rfds);
FD_SET(ptm, &rfds);
+ if(!(fptm = fdopen(ptm, "r+")))
+ err(EXIT_FAILURE, "cannot open pty");
+ if(fcntl(ptm, F_SETFL, O_NONBLOCK) == -1)
+ err(EXIT_FAILURE, "cannot set pty to non-blocking mode");
+ if(fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK) == -1)
+ err(EXIT_FAILURE, "cannot set stdin to non-blocking mode");
for(;;) {
- if(select(ptm + 1, &rfds, NULL, NULL, NULL) == -1)
+ if(select(MAX(ptm, STDIN_FILENO) + 1, &rfds, NULL, NULL, NULL) == -1)
err(EXIT_FAILURE, "cannot select");
- if(FD_ISSET(STDIN_FILENO, &rfds))
- do {
- c = getch(&cmdbuf);
- switch(c) {
- case ':':
- parsecmd();
- break;
- default:
+ if(FD_ISSET(ptm, &rfds)) {
+ for(;;) {
+ if((c = getc(fptm)) == EOF) {
+ if(feof(fptm)) {
+ FD_CLR(ptm, &rfds);
+ fflush(fptm);
+ break;
+ }
+ if(errno != EAGAIN)
+ err(EXIT_FAILURE, "cannot read from pty");
+ fflush(stdout);
break;
}
- } while(cmdbuf.i < cmdbuf.n);
- if(FD_ISSET(ptm, &rfds)) {
- do {
- c = getch(&ptmbuf);
switch(c) {
case '\033':
parseesc();
@@ -354,9 +332,32 @@ main(int argc, char *argv[]) {
default:
putchar(c);
}
- } while(ptmbuf.i < ptmbuf.n);
+ }
fflush(stdout);
}
+ if(FD_ISSET(STDIN_FILENO, &rfds)) {
+ for(;;) {
+ if((c = getchar()) == EOF) {
+ if(feof(stdin)) {
+ FD_CLR(STDIN_FILENO, &rfds);
+ fflush(fptm);
+ break;
+ }
+ if(errno != EAGAIN)
+ err(EXIT_FAILURE, "cannot read from stdin");
+ fflush(fptm);
+ break;
+ }
+ switch(c) {
+ case ':':
+ parsecmd();
+ break;
+ default:
+ putc(c, fptm);
+ }
+ }
+ fflush(fptm);
+ }
}
return 0;
}