117 lines
2.2 KiB
C
117 lines
2.2 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: o_ :::::: ::: */
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/* client.c :+: / :+::+: :+: */
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/* +:+ > +:++:+ +:+ */
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/* By: whaffman <whaffman@student.codam.nl> +#+ +:+ +#++#++:++#++ */
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/* +#+ +#+#+ +#++#+ +#+ \o/ */
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/* Created: 2024/07/18 16:28:03 by whaffman #+#+# #+#+# #+# #+# | */
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/* Updated: 2024/07/27 14:43:17 by whaffman ### ### ### ### / \ */
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/* */
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/* ************************************************************************** */
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#include <signal.h>
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#include <unistd.h>
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#define SLEEP 100
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static volatile int g_ack = 0;
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size_t ft_strlen(const char *s)
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{
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size_t length;
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length = 0;
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while (*s++)
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length++;
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return (length);
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}
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void ft_putstr(char *str)
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{
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write(1, str, ft_strlen(str));
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}
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int ft_isspace(int c)
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{
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return (' ' == c || '\f' == c || '\n' == c
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|| '\r' == c || '\t' == c || '\v' == c);
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}
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int ft_isdigit(char c)
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{
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return (c >= '0' && c <= '9');
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}
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int ft_atoi(const char *nptr)
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{
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int sign;
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int res;
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while (ft_isspace(*nptr))
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nptr++;
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res = 0;
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sign = 1;
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while (*nptr == '-' || *nptr == '+')
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{
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if (*nptr == '-')
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sign *= -1;
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nptr++;
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}
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while (ft_isdigit(*nptr))
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res = 10 * res + sign * (*nptr++ - '0');
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return (res);
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}
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int send_byte(int pid, unsigned char c)
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{
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int i;
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i = 0;
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while (i < 8)
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{
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if ((c & 128) == 128)
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kill(pid, SIGUSR1);
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else
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kill(pid, SIGUSR2);
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c = c << 1;
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usleep(SLEEP);
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while (!g_ack)
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pause();
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g_ack = 0;
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i++;
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}
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return (1);
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}
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int send_message(int pid, char *msg)
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{
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while (*msg)
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{
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send_byte(pid, *msg);
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msg++;
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}
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send_byte(pid, '\0');
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return (1);
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}
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void sig(int signum)
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{
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(void)signum;
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g_ack = 1;
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}
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int main(int argc, char *argv[])
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{
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int pid;
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if (argc != 3)
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ft_putstr("Usage: ./client <pid> <message>");
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pid = ft_atoi(argv[1]);
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if (pid <= 1)
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return (1);
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g_ack = 0;
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signal(SIGUSR1, sig);
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send_message(pid, argv[2]);
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return (0);
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}
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