47 lines
1.7 KiB
Diff
47 lines
1.7 KiB
Diff
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diff --git a/linux-user/main.c b/linux-user/main.c
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index 124b98c..b010fd2 100644
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--- a/linux-user/main.c
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+++ b/linux-user/main.c
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@@ -1905,6 +1905,10 @@ void usage(void)
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"-cpu model select CPU (-cpu ? for list)\n"
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"-drop-ld-preload drop LD_PRELOAD for target process\n"
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"\n"
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+ "Root options:\n"
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+ "-chroot dir chroot to dir\n"
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+ "-su uid:gid set numeric user and group IDs\n"
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+ "\n"
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"Debug options:\n"
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"-d options activate log (logfile=%s)\n"
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"-p pagesize set the host page size to 'pagesize'\n"
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@@ -2011,6 +2015,28 @@ int main(int argc, char **argv)
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drop_ld_preload = 1;
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} else if (!strcmp(r, "strace")) {
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do_strace = 1;
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+ } else if (!strcmp(r, "chroot")) {
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+ if (chdir(argv[optind++]) || chroot(".")) {
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+ fprintf(stderr, "Can't chroot to '%s' (are you root?)\n",
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+ argv[--optind]);
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+ _exit(1);
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+ }
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+ } else if (!strcmp(r, "su")) {
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+ int temp;
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+ char *gid = strchr(argv[optind], ':');
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+ if (gid) {
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+ temp = atoi(++gid);
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+ if (setresgid(temp, temp, temp)) {
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+ fprintf(stderr, "Can't set gid to %d (are you root?)\n",
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+ temp);
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+ _exit(1);
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+ }
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+ }
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+ temp = atoi(argv[optind++]);
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+ if (setresuid(temp, temp, temp)) {
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+ fprintf(stderr, "Can't set uid to %d (are you root?)\n", temp);
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+ _exit(1);
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+ }
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} else
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{
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usage();
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