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chrootenv: error on chrootenv-inside-chrootenv, resolves #32802

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This commit is contained in:
Yegor Timoshenko 2017-12-20 19:32:17 +00:00
parent 0234cd41b4
commit 710662be94
1 changed files with 10 additions and 2 deletions
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12
pkgs/build-support/build-fhs-userenv/chrootenv.c
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@ -155,7 +155,9 @@ int nftw_rm(const char *path, const struct stat *sb, int type,
#define REQUIREMENTS "Linux version >= 3.19 built with CONFIG_USER_NS option"
int main(int argc, char *argv[], char *envp[]) {
extern char **environ;
int main(int argc, char *argv[]) {
if (argc < 2) {
fprintf(stderr, "Usage: %s command [arguments...]\n"
"Requires " REQUIREMENTS ".\n",
@ -163,6 +165,12 @@ int main(int argc, char *argv[], char *envp[]) {
exit(EX_USAGE);
}
if (getenv("NIX_CHROOTENV") != NULL)
errorf(EX_USAGE, "can't create chrootenv inside chrootenv");
if (setenv("NIX_CHROOTENV", "1", false) < 0)
errorf(EX_IOERR, "setenv");
char tmpl[] = "/tmp/chrootenvXXXXXX";
char *root = mkdtemp(tmpl);
@ -222,7 +230,7 @@ int main(int argc, char *argv[], char *envp[]) {
argv++;
if (execvpe(*argv, argv, env_filter(envp)) < 0)
if (execvpe(*argv, argv, env_filter(environ)) < 0)
errorf(EX_OSERR, "execvpe");
}