|
|
|
@ -24,6 +24,7 @@
|
|
|
|
|
#include <errno.h>
|
|
|
|
|
#include <signal.h>
|
|
|
|
|
#include <pthread.h>
|
|
|
|
|
#include <fcntl.h>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* for -charset */
|
|
|
|
@ -3673,3 +3674,215 @@ ex:;
|
|
|
|
|
return(1);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* >>> make configurable by configure.ac # define Xorriso_allow_launch_frontenD 1 */
|
|
|
|
|
/* # define Xorriso_allow_launch_frontend_suiD 1 */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
int Xorriso_launch_frontend(struct XorrisO *xorriso, char *cmd,
|
|
|
|
|
char *cmd_pipe_adr, char *reply_pipe_adr, int flag)
|
|
|
|
|
{
|
|
|
|
|
int command_pipe[2], reply_pipe[2], ret, i, argc= 0, cpid, is_banned= 0;
|
|
|
|
|
char **argv= NULL, **exec_argv= NULL, *sfe= NULL, *adrpt;
|
|
|
|
|
struct stat stbuf;
|
|
|
|
|
|
|
|
|
|
Xorriso_alloc_meM(sfe, char, 5 * SfileadrL);
|
|
|
|
|
for(i= 0; i < 2; i++)
|
|
|
|
|
command_pipe[i]= reply_pipe[i]= -1;
|
|
|
|
|
|
|
|
|
|
#ifndef Xorriso_allow_launch_frontenD
|
|
|
|
|
/* To be controlled by: configure --enable-external-filters */
|
|
|
|
|
|
|
|
|
|
sprintf(xorriso->info_text, "-launch_frontend : Banned at compile time.");
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"This may be changed at compile time by ./configure option --enable-external-filters");
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "HINT", 0);
|
|
|
|
|
is_banned= 1;
|
|
|
|
|
|
|
|
|
|
#endif /* ! Xorriso_allow_launch_frontenD */
|
|
|
|
|
|
|
|
|
|
#ifndef Xorriso_allow_launch_frontend_suiD
|
|
|
|
|
|
|
|
|
|
/* To be controlled by: configure --enable-external-filters-setuid */
|
|
|
|
|
|
|
|
|
|
if(getuid() != geteuid()) {
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"-set_filter: UID and EUID differ. Will not run external programs.");
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FATAL", 0);
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"This may be changed at compile time by ./configure option --enable-external-filters-setuid");
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "HINT", 0);
|
|
|
|
|
is_banned= 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif /* ! Xorriso_allow_launch_frontend_suiD */
|
|
|
|
|
|
|
|
|
|
if(is_banned)
|
|
|
|
|
{ret= 0; goto ex;}
|
|
|
|
|
|
|
|
|
|
ret= Xorriso_parse_line(xorriso, cmd, "", "", 0, &argc, &argv, 1 | 64);
|
|
|
|
|
if(ret <= 0)
|
|
|
|
|
goto ex;
|
|
|
|
|
if(argc > 0) {
|
|
|
|
|
if(strchr(argv[0], '/') == NULL) {
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"-launch_frontend : Command path does not contain a '/'-character");
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
|
|
|
|
|
{ret= 0; goto ex;}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Add a NULL pointer for execv() */
|
|
|
|
|
Xorriso_alloc_meM(exec_argv, char *, argc + 1);
|
|
|
|
|
if(exec_argv == NULL) {
|
|
|
|
|
Xorriso_no_malloc_memory(xorriso, NULL, 0);
|
|
|
|
|
ret= -1; goto ex;
|
|
|
|
|
}
|
|
|
|
|
for(i= 0; i < argc; i++)
|
|
|
|
|
exec_argv[i]= argv[i];
|
|
|
|
|
exec_argv[argc]= NULL;
|
|
|
|
|
} else if(cmd_pipe_adr[0] == 0 || reply_pipe_adr[0] == 0)
|
|
|
|
|
{ret= 0; goto ex;}
|
|
|
|
|
|
|
|
|
|
if(cmd_pipe_adr[0] && reply_pipe_adr[0]) {
|
|
|
|
|
/* Create named pipes if needed */
|
|
|
|
|
for(i= 0; i < 2; i++) {
|
|
|
|
|
if(i == 0)
|
|
|
|
|
adrpt= cmd_pipe_adr;
|
|
|
|
|
else
|
|
|
|
|
adrpt= reply_pipe_adr;
|
|
|
|
|
ret= stat(adrpt, &stbuf);
|
|
|
|
|
if(ret == -1) {
|
|
|
|
|
ret= mknod(adrpt, S_IFIFO | S_IRWXU | S_IRWXG | S_IRWXO | S_IRWXO,
|
|
|
|
|
(dev_t) 0);
|
|
|
|
|
if(ret == -1) {
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"-launch_frontend: Cannot create named pipe %s",
|
|
|
|
|
Text_shellsafe(adrpt, sfe, 0));
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, errno,
|
|
|
|
|
"FAILURE", 0);
|
|
|
|
|
ret= 0; goto ex;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
ret= pipe(command_pipe);
|
|
|
|
|
if (ret == -1) {
|
|
|
|
|
no_pipe_open:
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"-launch_frontend: Failed to create a nameless pipe object");
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, errno, "FAILURE", 0);
|
|
|
|
|
ret= 0; goto ex;
|
|
|
|
|
}
|
|
|
|
|
ret= pipe(reply_pipe);
|
|
|
|
|
if (ret == -1)
|
|
|
|
|
goto no_pipe_open;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(argc > 0) {
|
|
|
|
|
cpid = fork();
|
|
|
|
|
if (cpid == -1) {
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"-launch_frontend: Failed to create a child process");
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, errno, "FAILURE", 0);
|
|
|
|
|
ret= 0; goto ex;
|
|
|
|
|
}
|
|
|
|
|
} else
|
|
|
|
|
cpid= -1; /* Dummy child id */
|
|
|
|
|
|
|
|
|
|
if (cpid != 0) {
|
|
|
|
|
/* Parent becomes the xorriso slave */
|
|
|
|
|
|
|
|
|
|
if(cmd_pipe_adr[0] && reply_pipe_adr[0]) {
|
|
|
|
|
command_pipe[0]= open(cmd_pipe_adr, O_RDONLY);
|
|
|
|
|
if(command_pipe[0] == -1) {
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"-launch_frontend: Failed to open named command pipe %s",
|
|
|
|
|
Text_shellsafe(cmd_pipe_adr, sfe, 0));
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, errno,
|
|
|
|
|
"FAILURE", 0);
|
|
|
|
|
ret= 0; goto ex;
|
|
|
|
|
}
|
|
|
|
|
reply_pipe[1]= open(reply_pipe_adr, O_WRONLY | O_APPEND);
|
|
|
|
|
if(reply_pipe[1] == -1) {
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"-launch_frontend: Failed to open named reply pipe %s",
|
|
|
|
|
Text_shellsafe(reply_pipe_adr, sfe, 0));
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, errno,
|
|
|
|
|
"FAILURE", 0);
|
|
|
|
|
ret= 0; goto ex;
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
/* Close unused pipe ends */
|
|
|
|
|
close(command_pipe[1]);
|
|
|
|
|
close(reply_pipe[0]);
|
|
|
|
|
}
|
|
|
|
|
close(0);
|
|
|
|
|
close(1);
|
|
|
|
|
close(2);
|
|
|
|
|
ret= dup2(command_pipe[0], 0);
|
|
|
|
|
if(ret == -1) {
|
|
|
|
|
no_dup:;
|
|
|
|
|
sprintf(xorriso->info_text,
|
|
|
|
|
"-launch_frontend: Failed to connect pipe to xorriso standard i/o channels");
|
|
|
|
|
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, errno, "FAILURE", 0);
|
|
|
|
|
ret= -1; goto ex;
|
|
|
|
|
}
|
|
|
|
|
ret= dup2(reply_pipe[1], 1);
|
|
|
|
|
if(ret == -1)
|
|
|
|
|
goto no_dup;
|
|
|
|
|
ret= dup2(reply_pipe[1], 2);
|
|
|
|
|
if(ret == -1)
|
|
|
|
|
goto no_dup;
|
|
|
|
|
ret= 1; goto ex;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Child becomes the frontend program */
|
|
|
|
|
|
|
|
|
|
/* Close unused pipe ends */;
|
|
|
|
|
if(cmd_pipe_adr[0] && reply_pipe_adr[0]) {
|
|
|
|
|
command_pipe[1]= open(cmd_pipe_adr, O_WRONLY | O_APPEND);
|
|
|
|
|
if(command_pipe[1] == -1) {
|
|
|
|
|
fprintf(stderr,
|
|
|
|
|
"xorriso: -launch_frontend: Failed to open named command pipe '%s'\n",
|
|
|
|
|
cmd_pipe_adr);
|
|
|
|
|
perror("xorriso: -launch_frontend");
|
|
|
|
|
exit(1);
|
|
|
|
|
}
|
|
|
|
|
reply_pipe[0]= open(reply_pipe_adr, O_RDONLY);
|
|
|
|
|
if(reply_pipe[0] == -1) {
|
|
|
|
|
fprintf(stderr,
|
|
|
|
|
"xorriso: -launch_frontend: Failed to open named reply pipe '%s'\n",
|
|
|
|
|
reply_pipe_adr);
|
|
|
|
|
exit(1);
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
close(command_pipe[0]);
|
|
|
|
|
close(reply_pipe[1]);
|
|
|
|
|
}
|
|
|
|
|
close(0);
|
|
|
|
|
close(1);
|
|
|
|
|
ret= dup2(command_pipe[1], 1);
|
|
|
|
|
if(ret == -1) {
|
|
|
|
|
perror("xorriso: -launch_frontend: Error on redirecting standard output for frontend");
|
|
|
|
|
exit(1);
|
|
|
|
|
}
|
|
|
|
|
ret= dup2(reply_pipe[0], 0);
|
|
|
|
|
if(ret == -1) {
|
|
|
|
|
perror("xorriso: -launch_frontend: Error on redirecting standard input for frontend");
|
|
|
|
|
exit(1);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
execv(exec_argv[0], exec_argv);
|
|
|
|
|
fprintf(stderr, "xorriso: -launch_frontend: Failure to start program '%s'\n",
|
|
|
|
|
exec_argv[0]);
|
|
|
|
|
perror("xorriso: -launch_frontend");
|
|
|
|
|
exit(1);
|
|
|
|
|
|
|
|
|
|
ex:;
|
|
|
|
|
Xorriso__dispose_words(&argc, &argv);
|
|
|
|
|
Xorriso_free_meM(exec_argv);
|
|
|
|
|
Xorriso_free_meM(sfe);
|
|
|
|
|
return(ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|