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/*
* Copyright (C) 2014-2016 Firejail Authors
*
* This file is part of firejail project
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "fseccomp.h"
#include <sys/syscall.h>
typedef struct {
char *name;
int nr;
} SyscallEntry;
static SyscallEntry syslist[] = {
//
// code generated using tools/extract-syscall
//
#include "../include/syscall.h"
//
// end of generated code
//
}; // end of syslist
// return -1 if error, or syscall number
int syscall_find_name(const char *name) {
int i;
int elems = sizeof(syslist) / sizeof(syslist[0]);
for (i = 0; i < elems; i++) {
if (strcmp(name, syslist[i].name) == 0)
return syslist[i].nr;
}
return -1;
}
char *syscall_find_nr(int nr) {
int i;
int elems = sizeof(syslist) / sizeof(syslist[0]);
for (i = 0; i < elems; i++) {
if (nr == syslist[i].nr)
return syslist[i].name;
}
return "unknown";
}
void syscall_print(void) {
int i;
int elems = sizeof(syslist) / sizeof(syslist[0]);
for (i = 0; i < elems; i++) {
printf("%d\t- %s\n", syslist[i].nr, syslist[i].name);
}
printf("\n");
}
// return 1 if error, 0 if OK
int syscall_check_list(const char *slist, void (*callback)(int fd, int syscall, int arg), int fd, int arg) {
// don't allow empty lists
if (slist == NULL || *slist == '\0') {
fprintf(stderr, "Error: empty syscall lists are not allowed\n");
return -1;
}
// work on a copy of the string
char *str = strdup(slist);
if (!str)
errExit("strdup");
char *ptr = str;
char *start = str;
while (*ptr != '\0') {
if (islower(*ptr) || isdigit(*ptr) || *ptr == '_')
;
else if (*ptr == ',') {
*ptr = '\0';
int nr = syscall_find_name(start);
if (nr == -1)
fprintf(stderr, "Warning: syscall %s not found\n", start);
else if (callback != NULL)
callback(fd, nr, arg);
start = ptr + 1;
}
ptr++;
}
if (*start != '\0') {
int nr = syscall_find_name(start);
if (nr == -1)
fprintf(stderr, "Warning: syscall %s not found\n", start);
else if (callback != NULL)
callback(fd, nr, arg);
}
free(str);
return 0;
}
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