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Util: Fix spawn

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This commit is contained in:
Martin Duquesnoy 2011-01-10 19:31:42 +01:00
parent 18e97d3e1e
commit 056cb5daf6
1 changed files with 42 additions and 11 deletions
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53
src/util.c
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@ -253,14 +253,15 @@ alias_to_str(char *conf_choice)
* \param cmd Command
* \return child pid
*/
pid_t
int
spawn(const char *format, ...)
{
char *sh = NULL;
char cmd[512];
va_list ap;
pid_t pid, ret;
int p[2];
size_t len;
pid_t pid;
va_start(ap, format);
len = vsnprintf(cmd, sizeof(cmd), format, ap);
@ -275,18 +276,48 @@ spawn(const char *format, ...)
if(!(sh = getenv("SHELL")))
sh = "/bin/sh";
if (pipe(p) == -1)
{
warn("pipe");
return -1;
}
if((pid = fork()) == 0)
{
if(dpy)
close(ConnectionNumber(dpy));
setsid();
execl(sh, sh, "-c", cmd, (char*)NULL);
err(1, "execl(%s)", cmd);
}
if (pid == -1)
warn("fork()");
close(p[0]);
if((pid = fork()) == 0)
{
if(dpy)
close(ConnectionNumber(dpy));
setsid();
execl(sh, sh, "-c", cmd, (char*)NULL);
exit(EXIT_FAILURE);
}
return pid;
if (sizeof(pid_t) != write(p[1], &pid, sizeof(pid_t)))
warn("write");
close(p[1]);
exit(EXIT_SUCCESS);
}
else if (pid != -1)
{
close(p[1]);
if (sizeof(pid_t) != read(p[0], &ret, sizeof(pid_t)))
{
warn("read");
ret = -1;
}
close(p[0]);
waitpid(pid, NULL, 0);
}
else
{
warn("fork");
ret = -1;
}
return ret;
}
/** Swap two pointer.