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Pull stdin reading out into a function, add ^c interrupt message on stderr.

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git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4357 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
Chris Allegretta 2009-01-30 17:37:44 +00:00
parent 25d459aa64
commit b0f0b7f471
1 changed files with 69 additions and 19 deletions
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88
src/nano.c
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@ -1031,6 +1031,73 @@ void do_exit(void)
display_main_list();
}
static struct sigaction pager_oldaction, pager_newaction; /* Original and temporary handlers for SIGINT. */
static bool pager_sig_failed = FALSE; /* Did sigaction() fail without changing the signal handlers? */
/* Things which need to be run regardless of whether
we finished the stdin pipe correctly or not */
void finish_stdin_pager(void)
{
FILE *f;
int ttystdin;
/* Read whatever we did get from stdin */
f = fopen("/dev/stdin", "rb");
if (f == NULL)
nperror("fopen");
read_file(f, "stdin", TRUE);
ttystdin = open("/dev/tty", O_RDONLY);
if (!ttystdin)
die(_("Couldn't reopen stdin from keyboard, sorry\n"));
dup2(ttystdin,0);
close(ttystdin);
tcgetattr(0, &oldterm);
if (!pager_sig_failed && sigaction(SIGINT, &pager_oldaction, NULL) == -1)
nperror("sigaction");
terminal_init();
doupdate();
}
/* Cancel reading from stdin like a pager */
RETSIGTYPE cancel_stdin_pager(int signal)
{
/* Currently do nothing, just handle the intr silently */
}
/* Let nano read stdin for the first file at least */
void stdin_pager(void)
{
endwin();
tcsetattr(0, TCSANOW, &oldterm);
fprintf(stderr, _("Reading from stdin, ^C to abort\n"));
/* Set things up so that Ctrl-C will cancel the new process. */
/* Enable interpretation of the special control keys so that we get
* SIGINT when Ctrl-C is pressed. */
enable_signals();
if (sigaction(SIGINT, NULL, &pager_newaction) == -1) {
pager_sig_failed = TRUE;
nperror("sigaction");
} else {
pager_newaction.sa_handler = cancel_stdin_pager;
if (sigaction(SIGINT, &pager_newaction, &pager_oldaction) == -1) {
pager_sig_failed = TRUE;
nperror("sigaction");
}
}
open_buffer("", FALSE);
finish_stdin_pager();
}
/* Initialize the signal handlers. */
void signal_init(void)
{
@ -2240,25 +2307,7 @@ int main(int argc, char **argv)
}
if (optind < argc && !strcmp(argv[optind], "-")) {
FILE *f;
int ttystdin;
struct termios term;
enable_signals();
open_buffer("", FALSE);
endwin();
f = fopen("/dev/stdin", "rb");
if (f == NULL)
nperror("fopen");
read_file(f, "stdin", TRUE);
ttystdin = open("/dev/tty", O_RDONLY);
if (!ttystdin)
die(_("Couldn't reopen stdin from keyboard, sorry\n"));
dup2(ttystdin,0);
close(ttystdin);
stdin_pager();
set_modified();
optind++;
}
@ -2364,3 +2413,4 @@ int main(int argc, char **argv)
/* We should never get here. */
assert(FALSE);
}