putstring(eraseln);
}
+/* magic --
+ * check for file magic numbers. This code would best be shared
+ * with the file(1) program or, perhaps, more should not try to be
+ * so smart. */
+static int magic(FILE *f, char *fs)
+{
+ signed char twobytes[2];
+
+ /* don't try to look ahead if the input is unseekable */
+ if (fseek(f, 0L, SEEK_SET))
+ return 0;
+
+ if (fread(twobytes, 2, 1, f) == 1) {
+ switch (twobytes[0] + (twobytes[1] << 8)) {
+ case 0407: /* a.out obj */
+ case 0410: /* a.out exec */
+ case 0413: /* a.out demand exec */
+ case 0405:
+ case 0411:
+ case 0177545:
+ case 0x457f: /* simple ELF detection */
+ printf(_("\n******** %s: Not a text file ********\n\n"),
+ fs);
+ return 1;
+ }
+ }
+ fseek(f, 0L, SEEK_SET); /* rewind() not necessary */
+ return 0;
+}
+
/* Check whether the file named by fs is an ASCII file which the user may
* access. If it is, return the opened file. Otherwise return NULL. */
static FILE *checkf(register char *fs, int *clearfirst)
return (f);
}
-/* magic --
- * check for file magic numbers. This code would best be shared
- * with the file(1) program or, perhaps, more should not try to be
- * so smart. */
-static int magic(FILE *f, char *fs)
-{
- signed char twobytes[2];
-
- /* don't try to look ahead if the input is unseekable */
- if (fseek(f, 0L, SEEK_SET))
- return 0;
-
- if (fread(twobytes, 2, 1, f) == 1) {
- switch (twobytes[0] + (twobytes[1] << 8)) {
- case 0407: /* a.out obj */
- case 0410: /* a.out exec */
- case 0413: /* a.out demand exec */
- case 0405:
- case 0411:
- case 0177545:
- case 0x457f: /* simple ELF detection */
- printf(_("\n******** %s: Not a text file ********\n\n"),
- fs);
- return 1;
- }
- }
- fseek(f, 0L, SEEK_SET); /* rewind() not necessary */
- return 0;
-}
-
static void prepare_line_buffer(void)
{
char *nline;
inwait++;
}
+static int ourputch(int c)
+{
+ return putc(c, stdout);
+}
+
+static void reset_tty(void)
+{
+ if (no_tty)
+ return;
+ if (pstate) {
+ /* putchar - if that isn't a macro */
+ tputs(ULexit, fileno(stdout), ourputch);
+ fflush(stdout);
+ pstate = 0;
+ }
+ otty.c_lflag |= ICANON | ECHO;
+ otty.c_cc[VMIN] = savetty0.c_cc[VMIN];
+ otty.c_cc[VTIME] = savetty0.c_cc[VTIME];
+ stty(fileno(stderr), &savetty0);
+}
+
+/* Clean up terminal state and exit. Also come here if interrupt signal received */
+static void __attribute__((__noreturn__)) end_it(int dummy __attribute__((__unused__)))
+{
+ /* May be executed as a signal handler as well as by main process.
+ *
+ * The _exit() may wait for pending I/O for really long time, be sure
+ * that signal handler is not executed in this time to avoid double
+ * de-initialization (free() calls, etc.).
+ */
+ signal(SIGINT, SIG_IGN);
+
+ reset_tty();
+ if (clreol) {
+ putchar('\r');
+ clreos();
+ fflush(stdout);
+ } else if (!clreol && (promptlen > 0)) {
+ kill_line();
+ fflush(stdout);
+ } else
+ putcerr('\n');
+ free(previousre);
+ free(Line);
+ _exit(EXIT_SUCCESS);
+}
+
static int readch(void)
{
unsigned char c;
return (changed);
}
-static int ourputch(int c)
+static void set_tty(void)
{
- return putc(c, stdout);
+ otty.c_lflag &= ~(ICANON | ECHO);
+ otty.c_cc[VMIN] = 1; /* read at least 1 char */
+ otty.c_cc[VTIME] = 0; /* no timeout */
+ stty(fileno(stderr), &otty);
}
-static void reset_tty(void)
+/* Come here if a quit signal is received */
+static void onquit(int dummy __attribute__((__unused__)))
{
- if (no_tty)
- return;
- if (pstate) {
- /* putchar - if that isn't a macro */
- tputs(ULexit, fileno(stdout), ourputch);
- fflush(stdout);
- pstate = 0;
+ signal(SIGQUIT, SIG_IGN);
+ if (!inwait) {
+ putchar('\n');
+ if (!startup) {
+ signal(SIGQUIT, onquit);
+ siglongjmp(restore, 1);
+ } else
+ Pause++;
+ } else if (!dum_opt && notell) {
+ promptlen += fprintf(stderr, _("[Use q or Q to quit]"));
+ notell = 0;
}
- otty.c_lflag |= ICANON | ECHO;
- otty.c_cc[VMIN] = savetty0.c_cc[VMIN];
- otty.c_cc[VTIME] = savetty0.c_cc[VTIME];
- stty(fileno(stderr), &savetty0);
+ signal(SIGQUIT, onquit);
}
-static void set_tty(void)
+/* Come here when we get a suspend signal from the terminal */
+static void onsusp(int dummy __attribute__((__unused__)))
{
- otty.c_lflag &= ~(ICANON | ECHO);
- otty.c_cc[VMIN] = 1; /* read at least 1 char */
- otty.c_cc[VTIME] = 0; /* no timeout */
- stty(fileno(stderr), &otty);
+ sigset_t signals, oldmask;
+
+ /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */
+ signal(SIGTTOU, SIG_IGN);
+ reset_tty();
+ fflush(stdout);
+ signal(SIGTTOU, SIG_DFL);
+ /* Send the TSTP signal to suspend our process group */
+ signal(SIGTSTP, SIG_DFL);
+
+ /* unblock SIGTSTP or we won't be able to suspend ourself */
+ sigemptyset(&signals);
+ sigaddset(&signals, SIGTSTP);
+ sigprocmask(SIG_UNBLOCK, &signals, &oldmask);
+
+ kill(0, SIGTSTP);
+ /* Pause for station break */
+
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+
+ /* We're back */
+ signal(SIGTSTP, onsusp);
+ set_tty();
+ if (inwait)
+ siglongjmp(restore, 1);
}
static void execute(char *filename, char *cmd, ...)
}
}
-/* Come here if a quit signal is received */
-static void onquit(int dummy __attribute__((__unused__)))
-{
- signal(SIGQUIT, SIG_IGN);
- if (!inwait) {
- putchar('\n');
- if (!startup) {
- signal(SIGQUIT, onquit);
- siglongjmp(restore, 1);
- } else
- Pause++;
- } else if (!dum_opt && notell) {
- promptlen += fprintf(stderr, _("[Use q or Q to quit]"));
- notell = 0;
- }
- signal(SIGQUIT, onquit);
-}
-
/* Come here if a signal for a window size change is received */
#ifdef SIGWINCH
static void chgwinsz(int dummy __attribute__((__unused__)))
}
#endif /* SIGWINCH */
-/* Clean up terminal state and exit. Also come here if interrupt signal received */
-static void __attribute__((__noreturn__)) end_it(int dummy __attribute__((__unused__)))
-{
- /* May be executed as a signal handler as well as by main process.
- *
- * The _exit() may wait for pending I/O for really long time, be sure
- * that signal handler is not executed in this time to avoid double
- * de-initialization (free() calls, etc.).
- */
- signal(SIGINT, SIG_IGN);
-
- reset_tty();
- if (clreol) {
- putchar('\r');
- clreos();
- fflush(stdout);
- } else if (!clreol && (promptlen > 0)) {
- kill_line();
- fflush(stdout);
- } else
- putcerr('\n');
- free(previousre);
- free(Line);
- _exit(EXIT_SUCCESS);
-}
-
static void copy_file(register FILE *f)
{
char buf[BUFSIZ];
}
}
-/* Come here when we get a suspend signal from the terminal */
-static void onsusp(int dummy __attribute__((__unused__)))
-{
- sigset_t signals, oldmask;
-
- /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */
- signal(SIGTTOU, SIG_IGN);
- reset_tty();
- fflush(stdout);
- signal(SIGTTOU, SIG_DFL);
- /* Send the TSTP signal to suspend our process group */
- signal(SIGTSTP, SIG_DFL);
-
- /* unblock SIGTSTP or we won't be able to suspend ourself */
- sigemptyset(&signals);
- sigaddset(&signals, SIGTSTP);
- sigprocmask(SIG_UNBLOCK, &signals, &oldmask);
-
- kill(0, SIGTSTP);
- /* Pause for station break */
-
- sigprocmask(SIG_SETMASK, &oldmask, NULL);
-
- /* We're back */
- signal(SIGTSTP, onsusp);
- set_tty();
- if (inwait)
- siglongjmp(restore, 1);
-}
-
int main(int argc, char **argv)
{
FILE *f;
projects / thirdparty / util-linux.git / commitdiff
