mirror of
https://github.com/Telecominfraproject/wlan-ap.git
synced 2025-10-29 17:42:41 +00:00
85 lines
1.4 KiB
C
85 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2022 Felix Fietkau <nbd@nbd.name>
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*/
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#include <sys/wait.h>
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#include <unistd.h>
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#include <stdio.h>
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#include "dhcpsnoop.h"
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int dhcpsnoop_run_cmd(char *cmd, bool ignore_error)
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{
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char *argv[] = { "sh", "-c", cmd, NULL };
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bool first = true;
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int status = -1;
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char buf[512];
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int fds[2];
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FILE *f;
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int pid;
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if (pipe(fds))
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return -1;
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pid = fork();
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if (!pid) {
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close(fds[0]);
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if (fds[1] != STDOUT_FILENO)
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dup2(fds[1], STDOUT_FILENO);
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if (fds[1] != STDERR_FILENO)
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dup2(fds[1], STDERR_FILENO);
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if (fds[1] > STDERR_FILENO)
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close(fds[1]);
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execv("/bin/sh", argv);
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exit(1);
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}
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if (pid < 0)
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return -1;
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close(fds[1]);
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f = fdopen(fds[0], "r");
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if (!f) {
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close(fds[0]);
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goto out;
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}
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while (fgets(buf, sizeof(buf), f) != NULL) {
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if (!strlen(buf))
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break;
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if (ignore_error)
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continue;
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if (first) {
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ULOG_WARN("Command: %s\n", cmd);
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first = false;
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}
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ULOG_WARN("%s%s", buf, strchr(buf, '\n') ? "" : "\n");
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}
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fclose(f);
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out:
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while (waitpid(pid, &status, 0) < 0)
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if (errno != EINTR)
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break;
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return status;
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}
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int main(int argc, char **argv)
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{
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ulog_open(ULOG_STDIO | ULOG_SYSLOG, LOG_DAEMON, "udhcpsnoop");
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uloop_init();
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dhcpsnoop_ubus_init();
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dhcpsnoop_dev_init();
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ulog_threshold(LOG_INFO);
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uloop_run();
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dhcpsnoop_ubus_done();
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dhcpsnoop_dev_done();
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uloop_done();
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return 0;
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}
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