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client.c
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client.c
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#include <signal.h>
#include <unistd.h>
static int aatoi(char *str)
{
int num;
int i;
int sign;
i = 0;
num = 0;
sign = 1;
if (str[i] == '-')
{
sign *= -1;
i++;
}
while (str[i] >= '0' && str[i] <= '9')
{
num = num * 10 + (str[i] - 48);
i++;
}
return (num * sign);
}
static void putbinary(int nbr, char *bcode, int *i)
{
char bin[2];
bin[0] = '0';
bin[1] = '1';
if (nbr >= 2)
{
putbinary(nbr / 2, bcode, i);
putbinary(nbr % 2, bcode, i);
}
else
{
bcode[*i] = bin[nbr];
*i += 1;
}
}
static void sendsignal(char c, int pid, int *sigcheck)
{
if (c == '0')
*sigcheck += kill(pid, SIGUSR1);
if (c == '1')
*sigcheck += kill(pid, SIGUSR2);
}
static void pre_sendsignal(unsigned char c, int pid, int *sigcheck)
{
int y;
char binarystr[8];
y = 0;
if (c < 64)
{
binarystr[0] = '0';
binarystr[1] = '0';
y += 2;
}
else if (c >= 64 && c <= 127)
{
binarystr[0] = '0';
y++;
}
putbinary(c, binarystr, &y);
y = 0;
while (y <= 8)
{
sendsignal(binarystr[y], pid, sigcheck);
y++;
usleep(800);
}
}
int main(int argc, char **argv)
{
int pid;
int x;
int sigcheck;
sigcheck = 0;
x = 0;
if (argc == 3)
{
pid = aatoi(argv[1]);
if (pid != -1)
{
while (argv[2][x])
{
pre_sendsignal(argv[2][x], pid, &sigcheck);
x++;
}
if (sigcheck == 0)
write(1, "Message sent successfully !", 28);
else
write(1, "An error has occured !", 23);
}
}
return (0);
}