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Diffstat (limited to 'src/sysexec.c')
-rw-r--r-- | src/sysexec.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/sysexec.c b/src/sysexec.c new file mode 100644 index 0000000..2ef1d50 --- /dev/null +++ b/src/sysexec.c @@ -0,0 +1,83 @@ +/* + * uAnytun + * + * uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full + * featured implementation uAnytun has no support for multiple connections + * or synchronisation. It is a small single threaded implementation intended + * to act as a client on small platforms. + * The secure anycast tunneling protocol (satp) defines a protocol used + * for communication between any combination of unicast and anycast + * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel + * mode and allows tunneling of every ETHER TYPE protocol (e.g. + * ethernet, ip, arp ...). satp directly includes cryptography and + * message authentication based on the methodes used by SRTP. It is + * intended to deliver a generic, scaleable and secure solution for + * tunneling and relaying of packets of any protocol. + * + * + * Copyright (C) 2007-2008 Christian Pointner <equinox@anytun.org> + * + * This file is part of uAnytun. + * + * uAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * uAnytun is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with uAnytun. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "datatypes.h" + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <errno.h> +#include <sys/wait.h> + +#include "sysexec.h" +#include "log.h" + +int uanytun_exec(const char* script, char* const argv[], char* const evp[]) +{ + if(!script) + return -1; + + pid_t pid; + pid = fork(); + if(!pid) { + int fd; + for (fd=getdtablesize();fd>=0;--fd) // close all file descriptors + close(fd); + + fd = open("/dev/null",O_RDWR); // stdin + if(fd == -1) + log_printf(WARNING, "can't open stdin"); + else { + if(dup(fd) == -1) // stdout + log_printf(WARNING, "can't open stdout"); + if(dup(fd) == -1) // stderr + log_printf(WARNING, "can't open stderr"); + } + execve(script, argv, evp); + // if execl return, an error occurred + log_printf(ERROR, "error on executing script: %s", strerror(errno)); + return -1; + } + int status = 0; + waitpid(pid, &status, 0); + if(WIFEXITED(status)) + log_printf(NOTICE, "script '%s' returned %d", script, WEXITSTATUS(status)); + else if(WIFSIGNALED(status)) + log_printf(NOTICE, "script '%s' terminated after signal %d", script, WTERMSIG(status)); + else + log_printf(ERROR, "executing script '%s': unkown error"); + + return status; + +} |