1 #include "git-compat-util.h"
2 #include "compat/terminal.h"
3 #include "sigchain.h"
4 #include "strbuf.h"
6 #ifdef HAVE_DEV_TTY
8 static int term_fd = -1;
9 static struct termios old_term;
11 static void restore_term(void)
12 {
13 if (term_fd < 0)
14 return;
16 tcsetattr(term_fd, TCSAFLUSH, &old_term);
17 term_fd = -1;
18 }
20 static void restore_term_on_signal(int sig)
21 {
22 restore_term();
23 sigchain_pop(sig);
24 raise(sig);
25 }
27 char *git_terminal_prompt(const char *prompt, int echo)
28 {
29 static struct strbuf buf = STRBUF_INIT;
30 int r;
31 FILE *fh;
33 fh = fopen("/dev/tty", "w+");
34 if (!fh)
35 return NULL;
37 if (!echo) {
38 struct termios t;
40 if (tcgetattr(fileno(fh), &t) < 0) {
41 fclose(fh);
42 return NULL;
43 }
45 old_term = t;
46 term_fd = fileno(fh);
47 sigchain_push_common(restore_term_on_signal);
49 t.c_lflag &= ~ECHO;
50 if (tcsetattr(fileno(fh), TCSAFLUSH, &t) < 0) {
51 term_fd = -1;
52 fclose(fh);
53 return NULL;
54 }
55 }
57 fputs(prompt, fh);
58 fflush(fh);
60 r = strbuf_getline(&buf, fh, '\n');
61 if (!echo) {
62 putc('\n', fh);
63 fflush(fh);
64 }
66 restore_term();
67 fclose(fh);
69 if (r == EOF)
70 return NULL;
71 return buf.buf;
72 }
74 #else
76 char *git_terminal_prompt(const char *prompt, int echo)
77 {
78 return getpass(prompt);
79 }
81 #endif