enterstr.c File Reference

Enter a string from keyboard. More...

#include <cm.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <unistd.h>

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Functions
int	main (int argc, char **argv)
	allows the user to enter a string in cooked mode

Detailed Description

Enter a string from keyboard.

Author

Bill Waller Copyright (c) 2025 MIT License billx.nosp@m.wall.nosp@m.er@gm.nosp@m.ail..nosp@m.com

Date

2026-02-09

Definition in file enterstr.c.

Function Documentation

main()

int main	(	int	argc,
		char **	argv )

allows the user to enter a string in cooked mode

Note

allows line editing and other features

writes the prompt to stderr and the user's input to stdout

handles signals to ensure that the terminal settings are restored if the program is interrupted.

Definition at line 32 of file enterstr.c.

                                {
    struct termios new_tioctl;
    char in_str[BUFSIZ];
    char *in_ptr = in_str;
    char *msg;
    char errmsg[128];
 
    if (argc < 2)
        strcpy(errmsg, "input:");
    else
        strcpy(errmsg, argv[1]);
    capture_shell_tioctl();
    sig_prog_mode();
    new_tioctl = shell_tioctl;
    new_tioctl.c_lflag |= ICANON;
    tcsetattr(2, TCSAFLUSH, &new_tioctl);
    while (1) {
        msg = errmsg;
        while (*msg)
            write(2, msg++, 1);
        if (read(2, in_str, BUFSIZ) > -1)
            break;
    }
    while (*in_ptr)
        write(1, in_ptr++, 1);
    sig_dfl_mode();
    restore_shell_tioctl();
    exit(0);
}

References capture_shell_tioctl(), restore_shell_tioctl(), shell_tioctl, sig_dfl_mode(), and sig_prog_mode().

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