gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mcexec: store full path to executable

Browse Source 
required so that a forked process can obtain exec reference in the
Linux kernel even if executable was specified with relative path
and fork was called after changing the current working directory
This commit is contained in:
Balazs Gerofi bgerofi@riken.jp
2014-12-03 15:14:26 +09:00
parent 8f30e16976
commit c1cf630a94
1 changed files with 18 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
executer/user/mcexec.c
View File

@ -548,9 +548,24 @@ int load_elf_desc(char *filename, struct program_load_desc **desc_p,
free(exec_path);
}
exec_path = strdup(filename);
if (!exec_path) {
fprintf(stderr, "WARNING: strdup(filename) failed\n");
if (!strncmp("/", filename, 1)) {
exec_path = strdup(filename);
if (!exec_path) {
fprintf(stderr, "WARNING: strdup(filename) failed\n");
return ENOMEM;
}
}
else {
char *cwd = getcwd(NULL, 0);
exec_path = malloc(strlen(cwd) + strlen(filename) + 1);
if (!exec_path) {
fprintf(stderr, "Error: allocating exec_path\n");
return ENOMEM;
}
sprintf(exec_path, "%s/%s", cwd, filename);
free(cwd);
}
desc = load_elf(fp, &interp_path);