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signaux fonctionnent sur test

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This commit is contained in:
hugogogo
2021-11-15 16:09:19 +01:00
parent 47ae67ed14
commit 57c271b9e2
4 changed files with 65 additions and 9 deletions
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47
test_rl_modif.c
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@@ -2,6 +2,7 @@
# include <unistd.h>
# include <readline/readline.h>
# include <signal.h>
# include <sys/wait.h>
void handler_sigint(int id)
{
@@ -12,16 +13,24 @@ void handler_sigint(int id)
rl_redisplay();
}
void handler_sigint_execution(int id)
{
(void)id;
write(1, "\n", 1);
exit(0);
}
int main(int argc, char *argv[], char *envp[])
{
(void)argc;
(void)argv;
char *line_input;
char *prompt;
pid_t pid;
signal(SIGINT, handler_sigint);
signal(SIGINT, handler_sigint); // signal handling for SINGINT while interactive mode
line_input = NULL;
prompt = strdup("\e[0;31mtest>\e[0m ");
prompt = strdup("\e[0;31m>\e[0m ");
while (1)
{
if (line_input)
@@ -29,8 +38,38 @@ int main(int argc, char *argv[], char *envp[])
line_input = readline(prompt);
if (line_input && *line_input)
{
write(1, line_input, strlen(line_input));
write(1, "\n", 1);
signal(SIGINT, SIG_IGN); // stop signal handling for SIGINT because end of interactive mode
pid = fork();
if (pid == 0)
{
signal(SIGINT, handler_sigint_execution); // start signal handling for SIGINT in child process
if (!strncmp("echo", line_input, 4))
{
write(1, "3", 2);
sleep(1);
write(1, "\b2", 2);
sleep(1);
write(1, "\b1", 2);
sleep(1);
write(1, "\b0\n", 3);
execve("/bin/echo", argv, envp);
}
else
{
write(1, line_input, strlen(line_input));
write(1, " 3", 2);
sleep(1);
write(1, "\b2", 2);
sleep(1);
write(1, "\b1", 2);
sleep(1);
write(1, "\b0\n", 3);
exit(0);
}
}
else
wait(0);
signal(SIGINT, handler_sigint); // restart signal handling for SIGINT because re-entring in interactive mode
}
else if (!line_input)
{