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8f309aeb82
The strbuf_getline() interface allows a byte other than LF or NUL as
the line terminator, but this is only because I wrote these
codepaths anticipating that there might be a value other than NUL
and LF that could be useful when I introduced line_termination long
time ago. No useful caller that uses other value has emerged.
By now, it is clear that the interface is overly broad without a
good reason. Many codepaths have hardcoded preference to read
either LF terminated or NUL terminated records from their input, and
then call strbuf_getline() with LF or NUL as the third parameter.
This step introduces two thin wrappers around strbuf_getline(),
namely, strbuf_getline_lf() and strbuf_getline_nul(), and
mechanically rewrites these call sites to call either one of
them. The changes contained in this patch are:
* introduction of these two functions in strbuf.[ch]
* mechanical conversion of all callers to strbuf_getline() with
either '\n' or '\0' as the third parameter to instead call the
respective thin wrapper.
After this step, output from "git grep 'strbuf_getline('" would
become a lot smaller. An interim goal of this series is to make
this an empty set, so that we can have strbuf_getline_crlf() take
over the shorter name strbuf_getline().
Signed-off-by: Junio C Hamano <gitster@pobox.com>
147 lines
2.5 KiB
C
147 lines
2.5 KiB
C
#include "git-compat-util.h"
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#include "compat/terminal.h"
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#include "sigchain.h"
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#include "strbuf.h"
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#if defined(HAVE_DEV_TTY) || defined(GIT_WINDOWS_NATIVE)
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static void restore_term(void);
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static void restore_term_on_signal(int sig)
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{
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restore_term();
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sigchain_pop(sig);
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raise(sig);
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}
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#ifdef HAVE_DEV_TTY
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#define INPUT_PATH "/dev/tty"
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#define OUTPUT_PATH "/dev/tty"
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static int term_fd = -1;
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static struct termios old_term;
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static void restore_term(void)
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{
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if (term_fd < 0)
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return;
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tcsetattr(term_fd, TCSAFLUSH, &old_term);
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close(term_fd);
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term_fd = -1;
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}
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static int disable_echo(void)
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{
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struct termios t;
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term_fd = open("/dev/tty", O_RDWR);
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if (tcgetattr(term_fd, &t) < 0)
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goto error;
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old_term = t;
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sigchain_push_common(restore_term_on_signal);
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t.c_lflag &= ~ECHO;
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if (!tcsetattr(term_fd, TCSAFLUSH, &t))
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return 0;
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error:
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close(term_fd);
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term_fd = -1;
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return -1;
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}
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#elif defined(GIT_WINDOWS_NATIVE)
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#define INPUT_PATH "CONIN$"
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#define OUTPUT_PATH "CONOUT$"
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#define FORCE_TEXT "t"
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static HANDLE hconin = INVALID_HANDLE_VALUE;
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static DWORD cmode;
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static void restore_term(void)
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{
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if (hconin == INVALID_HANDLE_VALUE)
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return;
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SetConsoleMode(hconin, cmode);
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CloseHandle(hconin);
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hconin = INVALID_HANDLE_VALUE;
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}
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static int disable_echo(void)
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{
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hconin = CreateFile("CONIN$", GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ, NULL, OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL, NULL);
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if (hconin == INVALID_HANDLE_VALUE)
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return -1;
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GetConsoleMode(hconin, &cmode);
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sigchain_push_common(restore_term_on_signal);
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if (!SetConsoleMode(hconin, cmode & (~ENABLE_ECHO_INPUT))) {
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CloseHandle(hconin);
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hconin = INVALID_HANDLE_VALUE;
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return -1;
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}
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return 0;
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}
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#endif
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#ifndef FORCE_TEXT
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#define FORCE_TEXT
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#endif
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char *git_terminal_prompt(const char *prompt, int echo)
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{
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static struct strbuf buf = STRBUF_INIT;
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int r;
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FILE *input_fh, *output_fh;
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input_fh = fopen(INPUT_PATH, "r" FORCE_TEXT);
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if (!input_fh)
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return NULL;
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output_fh = fopen(OUTPUT_PATH, "w" FORCE_TEXT);
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if (!output_fh) {
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fclose(input_fh);
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return NULL;
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}
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if (!echo && disable_echo()) {
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fclose(input_fh);
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fclose(output_fh);
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return NULL;
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}
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fputs(prompt, output_fh);
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fflush(output_fh);
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r = strbuf_getline_lf(&buf, input_fh);
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if (!echo) {
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putc('\n', output_fh);
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fflush(output_fh);
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}
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restore_term();
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fclose(input_fh);
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fclose(output_fh);
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if (r == EOF)
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return NULL;
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return buf.buf;
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}
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#else
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char *git_terminal_prompt(const char *prompt, int echo)
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{
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return getpass(prompt);
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}
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#endif
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