/*****************************************************************************
*
* $Id$
* Purpose ...............: Execute subprogram
*
*****************************************************************************
* Copyright (C) 1997-2004
*
* Michiel Broek FIDO: 2:280/2802
* Beekmansbos 10
* 1971 BV IJmuiden
* the Netherlands
*
* This file is part of MBSE BBS.
*
* This BBS is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* MBSE BBS 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 MBSE BBS; see the file COPYING. If not, write to the Free
* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*****************************************************************************/
#include "../config.h"
#include "mbselib.h"
int e_pid = 0; /* Execute child pid */
int _execute(char **, char *, char *, char *);
int _execute(char **args, char *in, char *out, char *err)
{
char buf[PATH_MAX];
int i, pid, status = 0, rc = 0;
memset(&buf, 0, sizeof(buf));
for (i = 0; i < 16; i++) {
if (args[i])
sprintf(buf, "%s %s", buf, args[i]);
else
break;
}
Syslog('+', "Execute:%s",buf);
fflush(stdout);
fflush(stderr);
if ((pid = fork()) == 0) {
/*
* A delay in the child to prevent it returns before the main
* process sees it ever started.
*/
msleep(150);
if (in) {
close(0);
if (open(in,O_RDONLY) != 0) {
WriteError("$Reopen of stdin to %s failed", MBSE_SS(in));
exit(MBERR_EXEC_FAILED);
}
}
if (out) {
close(1);
if (open(out,O_WRONLY | O_APPEND | O_CREAT,0600) != 1) {
WriteError("$Reopen of stdout to %s failed", MBSE_SS(out));
exit(MBERR_EXEC_FAILED);
}
}
if (err) {
close(2);
if (open(err,O_WRONLY | O_APPEND | O_CREAT,0600) != 2) {
WriteError("$Reopen of stderr to %s failed", MBSE_SS(err));
exit(MBERR_EXEC_FAILED);
}
}
errno = 0;
if (CFG.priority) {
rc = getpriority(PRIO_PROCESS, 0);
if (errno == 0) {
rc = setpriority(PRIO_PROCESS, 0, CFG.priority);
if (rc)
WriteError("$execv can't set priority to %d", CFG.priority);
}
}
rc = execv(args[0],args);
WriteError("$execv \"%s\" returned %d", MBSE_SS(args[0]), rc);
exit(MBERR_EXEC_FAILED);
}
e_pid = pid;
do {
rc = wait(&status);
e_pid = 0;
} while (((rc > 0) && (rc != pid)) || ((rc == -1) && (errno == EINTR)));
switch (rc) {
case -1:
if (errno == ECHILD) {
Syslog('+', "Execute: no child process");
return 0;
} else {
WriteError("$Wait returned %d, status %d,%d", rc,status>>8,status&0xff);
return -1;
}
case 0:
return 0;
default:
if (WIFEXITED(status)) {
rc = WEXITSTATUS(status);
if (rc) {
WriteError("Execute: returned error %d", rc);
return (rc + MBERR_EXTERNAL);
}
}
if (WIFSIGNALED(status)) {
rc = WTERMSIG(status);
WriteError("Wait stopped on signal %d", rc);
return rc;
}
if (rc)
WriteError("Wait stopped unknown, rc=%d", rc);
return rc;
}
return 0;
}
int execute(char **args, char *in, char *out, char *err)
{
int rc;
if (CFG.do_sync)
sync();
rc = _execute(args, in, out, err);
if (CFG.do_sync)
sync();
return rc;
}
/*
* The old behaviour, parse command strings to arguments.
*/
int execute_str(char *cmd, char *fil, char *pkt, char *in, char *out, char *err)
{
int i;
char *args[16], buf[PATH_MAX];
memset(args, 0, sizeof(args));
memset(&buf, 0, sizeof(buf));
i = 0;
if ((pkt != NULL) && strlen(pkt))
sprintf(buf, "%s %s %s", cmd, fil, pkt);
else
sprintf(buf, "%s %s", cmd, fil);
args[i++] = strtok(buf, " \t\0");
while ((args[i++] = strtok(NULL," \t\n")) && (i < 15));
args[i++] = NULL;
return execute(args, in, out, err);
}
/*
* Execute command in the PATH.
*/
int execute_pth(char *prog, char *opts, char *in, char *out, char *err)
{
char *pth;
int rc;
if (strchr(prog, ' ') || strchr(prog, '/')) {
WriteError("First parameter of execute_pth() must be a program name");
return -1;
}
pth = xstrcpy((char *)"/usr/bin/");
pth = xstrcat(pth, prog);
if (access(pth, X_OK) == -1) {
free(pth);
pth = xstrcpy((char *)"/usr/local/bin/");
pth = xstrcat(pth, prog);
if (access(pth, X_OK) == -1) {
free(pth);
pth = xstrcpy((char *)"/bin/");
pth = xstrcat(pth, prog);
if (access(pth, X_OK) == -1) {
free(pth);
pth = xstrcpy((char *)"/usr/pkg/bin/");
pth = xstrcat(pth, prog);
if (access(pth, X_OK) == -1) {
WriteError("Can't find %s", prog);
free(pth);
return -1;
}
}
}
}
rc = execute_str(pth, opts, NULL, in, out, err);
free(pth);
return rc;
}
#define SHELL "/bin/sh"
int _execsh(char *, char *, char *, char *);
int _execsh(char *cmd, char *in, char *out, char *err)
{
int pid, status, rc, sverr;
Syslog('+', "Execute shell: %s", MBSE_SS(cmd));
fflush(stdout);
fflush(stderr);
if ((pid = fork()) == 0) {
/*
* A delay in the child to prevent it returns before the main
* process sess it ever started.
*/
msleep(150);
if (in) {
close(0);
if (open(in, O_RDONLY) != 0) {
WriteError("$Reopen of stdin to %s failed",MBSE_SS(in));
exit(MBERR_EXEC_FAILED);
}
}
if (out) {
close(1);
if (open(out, O_WRONLY | O_APPEND | O_CREAT,0600) != 1) {
WriteError("$Reopen of stdout to %s failed",MBSE_SS(out));
exit(MBERR_EXEC_FAILED);
}
}
if (err) {
close(2);
if (open(err, O_WRONLY | O_APPEND | O_CREAT,0600) != 2) {
WriteError("$Reopen of stderr to %s failed",MBSE_SS(err));
exit(MBERR_EXEC_FAILED);
}
}
rc = execl(SHELL, "sh", "-c", cmd, NULL);
WriteError("$execl \"%s\" returned %d", MBSE_SS(cmd), rc);
exit(MBERR_EXEC_FAILED);
}
e_pid = pid;
do {
rc = wait(&status);
e_pid = 0;
sverr = errno;
if (status)
WriteError("$Wait returned %d, status %d,%d", rc, status >> 8, status & 0xff);
}
while (((rc > 0) && (rc != pid)) || ((rc == -1) && (sverr == EINTR)));
if (rc == -1) {
WriteError("$Wait returned %d, status %d,%d", rc, status >> 8, status & 0xff);
return 0;
}
return status;
}
int execsh(char *cmd, char *in, char *out, char *err)
{
int rc;
if (CFG.do_sync)
sync();
rc = _execsh(cmd, in, out, err);
if (CFG.do_sync)
sync();
return rc;
}