int main(int argc, char **argv)
{
char *hide = "\x1b[2J\x1b[H\x1b[?25l";
char *show = "\x1b[?25h";
char **args = argv + 1;
if (fb_init(FBDEV)) {
fprintf(stderr, "fbpad: failed to initialize the framebuffer\n");
return 1;
}
if (sizeof(fbval_t) != FBM_BPP(fb_mode())) {
fprintf(stderr, "fbpad: fbval_t does not match framebuffer depth\n");
return 1;
}
if (pad_init()) {
fprintf(stderr, "fbpad: cannot find fonts\n");
return 1;
}
write(1, hide, strlen(hide));
signalsetup();
fcntl(0, F_SETFL, fcntl(0, F_GETFL) | O_NONBLOCK);
while (args[0] && args[0][0] == '-')
args++;
mainloop(args[0] ? args : NULL);
write(1, show, strlen(show));
pad_free();
scr_done();
fb_free();
return 0;
}
int main (void) {
char *backp;
sigset_t blockmask;
pid_t childpid;
struct sigaction defhandler;
int inbackground;
char inbuf[MAX_CANON];
int len;
if (signalsetup(&defhandler, &blockmask, jumphd) == -1) {
perror("Failed to set up shell signal handling");
return 1;
}
for( ; ; ) {
if ((sigsetjmp(jumptoprompt, 1)) && /* if return from signal, newline */
(fputs("\n", stdout) == EOF) )
continue;
okaytojump = 1;
printf("%d",(int)getpid());
if (fputs(PROMPT_STRING, stdout) == EOF)
continue;
if (fgets(inbuf, MAX_CANON, stdin) == NULL)
continue;
len = strlen(inbuf);
if (inbuf[len - 1] == '\n')
inbuf[len - 1] = 0;
if (strcmp(inbuf, QUIT_STRING) == 0)
break;
if ((backp = strchr(inbuf, BACK_SYMBOL)) == NULL)
inbackground = 0;
else {
inbackground = 1;
*backp = 0;
}
if (sigprocmask(SIG_BLOCK, &blockmask, NULL) == -1)
perror("Failed to block signals");
if ((childpid = fork()) == -1)
perror("Failed to fork");
else if (childpid == 0) {
if (inbackground && (setpgid(0, 0) == -1))
return 1;
if ((sigaction(SIGINT, &defhandler, NULL) == -1) ||
(sigaction(SIGQUIT, &defhandler, NULL) == -1) ||
(sigprocmask(SIG_UNBLOCK, &blockmask, NULL) == -1)) {
perror("Failed to set signal handling for command ");
return 1;
}
executecmd(inbuf);
return 1;
}
if (sigprocmask(SIG_UNBLOCK, &blockmask, NULL) == -1)
perror("Failed to unblock signals");
if (!inbackground) /* wait explicitly for the foreground process */
waitpid(childpid, NULL, 0);
while (waitpid(-1, NULL, WNOHANG) > 0); /* wait for background procs */
}
return 0;
}
int main (void) {
sigset_t blockmask;
pid_t childpid;
struct sigaction defaction;
char inbuf[MAX_CANON];
int len;
if (signalsetup(&defaction, &blockmask, SIG_IGN) == -1) {
perror("Failed to set up shell signal handling");
return 1;
}
if (sigprocmask(SIG_BLOCK, &blockmask, NULL) == -1) {
perror("Failed to block signals");
return 1;
}
for( ; ; ) {
if (fputs(PROMPT_STRING, stdout) == EOF)
continue;
if (fgets(inbuf, MAX_CANON, stdin) == NULL)
continue;
len = strlen(inbuf);
if (inbuf[len - 1] == '\n')
inbuf[len - 1] = 0;
if (strcmp(inbuf, QUIT_STRING) == 0)
break;
if ((childpid = fork()) == -1) {
perror("Failed to fork child to execute command");
} else if (childpid == 0) {
if ((sigaction(SIGINT, &defaction, NULL) == -1) ||
(sigaction(SIGQUIT, &defaction, NULL) == -1) ||
(sigprocmask(SIG_UNBLOCK, &blockmask, NULL) == -1)) {
perror("Failed to set signal handling for command ");
return 1;
}
executecmd(inbuf);
return 1;
}
wait(NULL);
}
return 0;
}
int main (void) {
char *backp;
sigset_t blockmask;
pid_t childpid;
struct sigaction defhandler;
int inbackground;
int len;
char inbuf[MAX_CANON];
if (signalsetup(&defhandler, &blockmask, jumphd) == -1) {
perror("Failed to set up shell signal handling");
return 1;
}
for( ; ; ) {
if ((sigsetjmp(jumptoprompt, 1)) && /* if return from signal, \n */
(fputs("\n", stdout) == EOF) )
continue;
okaytojump = 1;
printf("%d",(int)getpid());
if (fputs(PROMPT_STRING, stdout) == EOF)
continue;
if (fgets(inbuf, MAX_CANON, stdin) == NULL)
continue;
len = strlen(inbuf);
if (inbuf[len - 1] == '\n')
inbuf[len - 1] = 0;
if (strcmp(inbuf, QUIT_STRING) == 0)
break;
if ((backp = strchr(inbuf, BACK_SYMBOL)) == NULL)
inbackground = 0;
else {
inbackground = 1;
*backp = 0;
}
if (sigprocmask(SIG_BLOCK, &blockmask, NULL) == -1)
perror("Failed to block signals");
if ((childpid = fork()) == -1)
perror("Failed to fork");
else if (childpid == 0) {
if (inbackground) { /* child creates another process */
if ((childpid = fork()) == -1) {
perror("Second fork failed");
return 1;
}
if (childpid > 0)
return 0;
if (setpgid(0, 0) == -1) {
perror("setpgod failed");
return 1;
}
}
if ((sigaction(SIGINT, &defhandler, NULL) < 0) ||
(sigaction(SIGQUIT, &defhandler, NULL) < 0) ||
(sigprocmask(SIG_UNBLOCK, &blockmask, NULL) == -1)) {
perror("Failed to set signal handling for command ");
return 1;
}
executecmd(inbuf);
perror("Failed to execute command");
return 1;
}
if (sigprocmask(SIG_UNBLOCK, &blockmask, NULL) == -1)
perror("Failed to unblock signals");
wait(NULL);
}
return 0;
}
