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   C言語入門  その2  サンプルコード
by H.Y 3月 3 11:33:51 JST 2002

samples3.txt

// No.1 ------------ password.c ----------------------------
#include <termios.h>
#include <stdio.h>

#define PASSWORD_LEN 8

int main()
{
struct termios initialrsettings, newrsettings;
char password[PASSWORD_LEN + 1];
tcgetattr(fileno(stdin), &initialrsettings);
newrsettings = initialrsettings;
newrsettings.c_lflag &= ~ECHO;

printf("Enter password: ");
if(tcsetattr(fileno(stdin), TCSAFLUSH, &newrsettings) != 0) {
fprintf(stderr,"Could not set attributes\n");
}
else {
fgets(password, PASSWORD_LEN, stdin);
tcsetattr(fileno(stdin), TCSANOW, &initialrsettings);
fprintf(stdout, "\nYou entered %s\n", password);
}
exit(0);
}

// No.2 ------------- menu4.c --------------------------
#include <stdio.h>
#include <unistd.h>
#include <termios.h>

char *menu[] = {
"a - add new record",
"d - delete record",
"q - quit",
NULL,
};

int getchoice(char *greet, char *choices[], FILE *in, FILE *out);

int main()
{
int choice = 0;
FILE *input;
FILE *output;
struct termios initial_settings, new_settings;

if (!isatty(fileno(stdout))) {
fprintf(stderr,"You are not a terminal, OK.\n");
}

input = fopen("/dev/tty", "r");
output = fopen("/dev/tty", "w");
if(!input || !output) {
fprintf(stderr, "Unable to open /dev/tty\n");
exit(1);
}

tcgetattr(fileno(input),&initial_settings);
new_settings = initial_settings;
new_settings.c_lflag &= ~ICANON;
new_settings.c_lflag &= ~ECHO;
new_settings.c_cc[VMIN] = 1;
new_settings.c_cc[VTIME] = 0;
new_settings.c_lflag &= ~ISIG;
if(tcsetattr(fileno(input), TCSANOW, &new_settings) != 0) {
fprintf(stderr,"could not set attributes\n");
}

do {
choice = getchoice("Please select an action", menu, input, output);
printf("You have chosen: %c\n", choice);
} while (choice != 'q');
tcsetattr(fileno(input),TCSANOW,&initial_settings);
exit(0);
}

int getchoice(char *greet, char *choices[], FILE *in, FILE *out)
{
int chosen = 0;
int selected;
char **option;

do {
fprintf(out, "Choice: %s\n",greet);
option = choices;
while(*option) {
fprintf(out, "%s\n",*option);
option++;
}
do {
selected = fgetc(in);
} while (selected == '\n' || selected == '\r');
option = choices;
while(*option) {
if(selected == *option[0]) {
chosen = 1;
break;
}
option++;
}
if(!chosen) {
fprintf(out, "Incorrect choice, select again\n");
}
} while(!chosen);
return selected;
}

// No. ---------------------------------------------------








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