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Die after receiving SIGUSR1 and when number of children goes to zero.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@778 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
1996-09-28 21:42:58 +00:00
parent 4c1ddaa714
commit 785ad8784f
1 changed files with 40 additions and 2 deletions
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42
appl/kx/kx.c
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@@ -6,6 +6,42 @@ char *prog;
static u_int32_t display_num; static u_int32_t display_num;
static char xauthfile[MaxPathLen]; static char xauthfile[MaxPathLen];
static int nchild;
static int donep;
/*
* Signal handler that justs waits for the children when they die.
*/
static RETSIGTYPE
childhandler (int sig)
{
pid_t pid;
int status;
do {
pid = waitpid (-1, &status, WNOHANG|WUNTRACED);
if (pid > 0 && WIFEXITED(status) || WIFSIGNALED(status))
if (--nchild == 0 && donep)
exit (0);
} while(pid > 0);
signal (SIGCHLD, childhandler);
SIGRETURN(0);
}
/*
* Handler for SIGUSR1.
* This signal means that we should wait until there are no children
* left and then exit.
*/
static RETSIGTYPE
usr1handler (int sig)
{
donep = 1;
SIGRETURN(0);
}
/* /*
* Establish authenticated connection * Establish authenticated connection
@@ -267,14 +303,14 @@ doit (char *host, int passivep, int debugp)
/* close (otherside); */ /* close (otherside); */
fn = passive; fn = passive;
if(debugp) if(debugp)
printf ("%d\t%s\n", display_num, xauthfile); printf ("%d\t%d\t%s\n", getpid(), display_num, xauthfile);
else { else {
pid = fork(); pid = fork();
if (pid < 0) { if (pid < 0) {
fprintf (stderr, "%s: fork: %s\n", prog, strerror(errno)); fprintf (stderr, "%s: fork: %s\n", prog, strerror(errno));
return 1; return 1;
} else if (pid > 0) { } else if (pid > 0) {
printf ("%d\t%s\n", display_num, xauthfile); printf ("%d\t%d\t%s\n", pid, display_num, xauthfile);
exit (0); exit (0);
} else { } else {
fclose(stdout); fclose(stdout);
@@ -300,6 +336,7 @@ doit (char *host, int passivep, int debugp)
strerror(errno)); strerror(errno));
return 1; return 1;
} }
++nchild;
child = fork (); child = fork ();
if (child < 0) { if (child < 0) {
fprintf (stderr, "%s: fork: %s\n", prog, fprintf (stderr, "%s: fork: %s\n", prog,
@@ -360,5 +397,6 @@ main(int argc, char **argv)
*/ */
passivep = 1; passivep = 1;
signal (SIGCHLD, childhandler); signal (SIGCHLD, childhandler);
signal (SIGUSR1, usr1handler);
return doit (argv[0], passivep, debugp); return doit (argv[0], passivep, debugp);
} }