2 #include <sys/select.h>
16 #define LENGTH(x) (sizeof(x) / sizeof((x)[0]))
17 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
18 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
21 void cmd(const char *cmdstr, ...);
22 void *emallocz(unsigned int size);
23 void eprint(const char *errstr, ...);
24 void eprintn(const char *errstr, ...);
26 void movea(int x, int y);
27 void mover(int x, int y);
35 unsigned char data[BUFSIZ];
40 int cols = 80, lines = 25;
45 _Bool bold, digit, qmark;
51 if(buf.n < LENGTH(buf.data))
54 buf.s = (buf.s + 1) % LENGTH(buf.data);
55 buf.data[buf.e++] = c;
56 buf.e %= LENGTH(buf.data);
60 cmd(const char *cmdstr, ...) {
66 vfprintf(stdout, cmdstr, ap);
71 emallocz(unsigned int size) {
72 void *res = calloc(1, size);
75 eprint("fatal: could not malloc() %u bytes\n", size);
80 eprint(const char *errstr, ...) {
84 vfprintf(stderr, errstr, ap);
90 eprintn(const char *errstr, ...) {
94 vfprintf(stderr, errstr, ap);
96 fprintf(stderr, ": %s\n", strerror(errno));
104 #if defined(_GNU_SOURCE)
106 #elif _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
107 ptm = posix_openpt(O_RDWR);
109 ptm = open("/dev/ptmx", O_RDWR);
111 if(openpty(&ptm, &pts, NULL, NULL, NULL) == -1)
112 eprintn("error, cannot open pty");
114 #if defined(_XOPEN_SOURCE)
116 if(grantpt(ptm) == -1)
117 eprintn("error, cannot grant access to pty");
118 if(unlockpt(ptm) == -1)
119 eprintn("error, cannot unlock pty");
120 ptsdev = ptsname(ptm);
122 eprintn("error, slave pty name undefined");
123 pts = open(ptsdev, O_RDWR);
125 eprintn("error, cannot open slave pty");
128 eprintn("error, cannot open pty");
133 movea(int x, int y) {
138 cmd("s %d,%d", x, y);
142 mover(int x, int y) {
143 movea(cx + x, cy + y);
151 memset(arg, 0, LENGTH(arg));
156 for(j = 0; j < LENGTH(arg);) {
166 eprint("syntax error\n");
183 mover(0, j ? arg[0] : 1);
186 mover(0, j ? -arg[0] : -1);
189 mover(j ? arg[0] : 1, 0);
192 mover(j ? -arg[0] : -1, 0);
195 /* movel(j ? arg[0] : 1); */
198 /* movel(j ? -arg[0] : -1); */
202 movea(j ? arg[0] : 1, cy);
206 movea(arg[1] ? arg[1] : 1, arg[0] ? arg[0] : 1);
208 /* insline(j ? arg[0] : 1); */
211 /* delline(j ? arg[0] : 1); */
216 scroll(j ? arg[0] : 1);
219 scroll(j ? -arg[0] : -1);
222 movea(cx, j ? arg[0] : 1);
225 for(i = 0; i < j; i++) {
226 if(arg[i] >= 30 && arg[i] <= 37)
227 cmd("#%d", arg[i] - 30);
228 if(arg[i] >= 40 && arg[i] <= 47)
229 cmd("|%d", arg[i] - 40);
230 /* xterm bright colors */
231 if(arg[i] >= 90 && arg[i] <= 97)
232 cmd("#%d", arg[i] - 90);
233 if(arg[i] >= 100 && arg[i] <= 107)
234 cmd("|%d", arg[i] - 100);
257 cmd("s %d, %d", cx, cy + l);
262 static char *shell = NULL;
264 if(!shell && !(shell = getenv("SHELL")))
269 eprint("error, cannot fork\n");
272 dup2(pts, STDIN_FILENO);
273 dup2(pts, STDOUT_FILENO);
274 dup2(pts, STDERR_FILENO);
276 putenv("TERM=vt102");
281 signal(SIGCHLD, sigchld);
289 if(waitpid(pid, &ret, 0) == -1)
290 eprintn("error, waiting for child failed");
292 exit(WEXITSTATUS(ret));
301 c = buf.data[buf.s++];
302 buf.s %= LENGTH(buf.data);
308 main(int argc, char *argv[]) {
309 if(argc == 2 && !strcmp("-v", argv[1]))
310 eprint("std-"VERSION", © 2008 Matthias-Christian Ott\n");
312 eprint("usage: st [-v]\n");
315 fptm = fdopen(ptm, "r+");
317 eprintn("cannot open slave pty");