From d58dd3b8bc42ed31232e4145696d7dacb117a31c Mon Sep 17 00:00:00 2001 From: Anselm R Garbe Date: Sun, 10 May 2009 13:17:09 +0100 Subject: backport of local changes --- std.c | 363 ------------------------------------------------------------------ 1 file changed, 363 deletions(-) delete mode 100644 std.c (limited to 'std.c') diff --git a/std.c b/std.c deleted file mode 100644 index 55da9d6..0000000 --- a/std.c +++ /dev/null @@ -1,363 +0,0 @@ -/* See LICENSE file for copyright and license details. - * - * Simple terminal daemon is a terminal emulator. It can be used in - * combination with simple terminal to emulate a mostly VT100-compatible - * terminal. - * - * In this process std works like a filter. It reads data from a - * pseudo-terminal and parses the escape sequences and transforms them - * into an ed(1)-like language. The resulting data is buffered and - * written to stdout. - * Parallely it reads data from stdin and parses and executes the - * commands. The resulting data is written to the pseudo-terminal. - */ -#include -#include -#include -#include -#include -#include -#if !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) -#include -#endif -#include -#include -#include -#include -#include -#include - -#define LENGTH(x) (sizeof(x) / sizeof((x)[0])) -#define MAX(a,b) (((a) > (b)) ? (a) : (b)) -#define MIN(a,b) (((a) < (b)) ? (a) : (b)) - -typedef struct { - unsigned char data[BUFSIZ]; - int s, e; - int n; -} RingBuffer; - -static void buffer(char c); -static void cmd(const char *cmdstr, ...); -static void getpty(void); -static void movea(int x, int y); -static void mover(int x, int y); -static void parsecmd(void); -static void parseesc(void); -static void scroll(int l); -static void shell(void); -static void sigchld(int n); -static char unbuffer(void); - -static int cols = 80, lines = 25; -static int cx = 0, cy = 0; -static int c; -static int ptm, pts; -static _Bool bold, digit, qmark; -static pid_t pid; -static RingBuffer buf; -static FILE *fptm; - -void -buffer(char c) { - if(buf.n < LENGTH(buf.data)) - buf.n++; - else - buf.s = (buf.s + 1) % LENGTH(buf.data); - buf.data[buf.e++] = c; - buf.e %= LENGTH(buf.data); -} - -void -cmd(const char *cmdstr, ...) { - va_list ap; - - putchar('\n'); - putchar(':'); - va_start(ap, cmdstr); - vfprintf(stdout, cmdstr, ap); - va_end(ap); -} - -void -movea(int x, int y) { - x = MAX(x, cols); - y = MAX(y, lines); - cx = x; - cy = y; - cmd("seek(%d,%d)", x, y); -} - -void -mover(int x, int y) { - movea(cx + x, cy + y); -} - -void -parsecmd(void) { -} - -void -parseesc(void) { - int i, j; - int arg[16]; - - memset(arg, 0, LENGTH(arg)); - c = getc(fptm); - switch(c) { - case '[': - c = getc(fptm); - for(j = 0; j < LENGTH(arg);) { - if(isdigit(c)) { - digit = 1; - arg[j] *= 10; - arg[j] += c - '0'; - } - else if(c == '?') - qmark = 1; - else if(c == ';') { - if(!digit) - errx(EXIT_FAILURE, "syntax error"); - digit = 0; - j++; - } - else { - if(digit) { - digit = 0; - j++; - } - break; - } - c = getc(fptm); - } - switch(c) { - case '@': - break; - case 'A': - mover(0, j ? arg[0] : 1); - break; - case 'B': - mover(0, j ? -arg[0] : -1); - break; - case 'C': - mover(j ? arg[0] : 1, 0); - break; - case 'D': - mover(j ? -arg[0] : -1, 0); - break; - case 'E': - /* movel(j ? arg[0] : 1); */ - break; - case 'F': - /* movel(j ? -arg[0] : -1); */ - break; - case '`': - case 'G': - movea(j ? arg[0] : 1, cy); - break; - case 'f': - case 'H': - movea(arg[1] ? arg[1] : 1, arg[0] ? arg[0] : 1); - case 'L': - /* insline(j ? arg[0] : 1); */ - break; - case 'M': - /* delline(j ? arg[0] : 1); */ - break; - case 'P': - break; - case 'S': - scroll(j ? arg[0] : 1); - break; - case 'T': - scroll(j ? -arg[0] : -1); - break; - case 'd': - movea(cx, j ? arg[0] : 1); - break; - case 'm': - for(i = 0; i < j; i++) { - if(arg[i] >= 30 && arg[i] <= 37) - cmd("#%d", arg[i] - 30); - if(arg[i] >= 40 && arg[i] <= 47) - cmd("|%d", arg[i] - 40); - /* xterm bright colors */ - if(arg[i] >= 90 && arg[i] <= 97) - cmd("#%d", arg[i] - 90); - if(arg[i] >= 100 && arg[i] <= 107) - cmd("|%d", arg[i] - 100); - switch(arg[i]) { - case 0: - case 22: - if(bold) - cmd("bold"); - case 1: - if(!bold) - cmd("bold"); - break; - } - } - break; - } - break; - default: - putchar('\033'); - ungetc(c, fptm); - } -} - -void -scroll(int l) { - cmd("seek(%d,%d)", cx, cy + l); -} - -void -getpty(void) { - char *ptsdev; - -#if defined(_GNU_SOURCE) - ptm = getpt(); -#elif _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600 - ptm = posix_openpt(O_RDWR); -#else - ptm = open("/dev/ptmx", O_RDWR); - if(ptm == -1) - if(openpty(&ptm, &pts, NULL, NULL, NULL) == -1) - err(EXIT_FAILURE, "cannot open pty"); -#endif -#if defined(_XOPEN_SOURCE) - if(ptm != -1) { - if(grantpt(ptm) == -1) - err(EXIT_FAILURE, "cannot grant access to pty"); - if(unlockpt(ptm) == -1) - err(EXIT_FAILURE, "cannot unlock pty"); - ptsdev = ptsname(ptm); - if(!ptsdev) - err(EXIT_FAILURE, "slave pty name undefined"); - pts = open(ptsdev, O_RDWR); - if(pts == -1) - err(EXIT_FAILURE, "cannot open slave pty"); - } - else - err(EXIT_FAILURE, "cannot open pty"); -#endif -} - -void -shell(void) { - static char *shell = NULL; - - if(!shell && !(shell = getenv("SHELL"))) - shell = "/bin/sh"; - pid = fork(); - switch(pid) { - case -1: - err(EXIT_FAILURE, "cannot fork"); - case 0: - setsid(); - dup2(pts, STDIN_FILENO); - dup2(pts, STDOUT_FILENO); - dup2(pts, STDERR_FILENO); - close(ptm); - putenv("TERM=vt102"); - execvp(shell, NULL); - break; - default: - close(pts); - signal(SIGCHLD, sigchld); - } -} - -void -sigchld(int n) { - int ret; - - if(waitpid(pid, &ret, 0) == -1) - err(EXIT_FAILURE, "waiting for child failed"); - if(WIFEXITED(ret)) - exit(WEXITSTATUS(ret)); - else - exit(EXIT_SUCCESS); -} - -char -unbuffer(void) { - char c; - - c = buf.data[buf.s++]; - buf.s %= LENGTH(buf.data); - buf.n--; - return c; -} - -int -main(int argc, char *argv[]) { - fd_set rfds; - - if(argc == 2 && !strcmp("-v", argv[1])) - errx(EXIT_SUCCESS, "std-"VERSION", © 2008 Matthias-Christian Ott"); - else if(argc == 1) - errx(EXIT_FAILURE, "usage: std [-v]"); - getpty(); - shell(); - 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(MAX(ptm, STDIN_FILENO) + 1, &rfds, NULL, NULL, NULL) == -1) - err(EXIT_FAILURE, "cannot select"); - 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; - } - switch(c) { - case '\033': - parseesc(); - break; - default: - putchar(c); - } - } - 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; -} -- cgit v1.2.3