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nstool: Advertise the holder's cwd (in its mountns) across the socket

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This is possible useful in nstool info and has further uses for nstool
exec.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2023-04-06 13:28:18 +10:00 committed by Stefano Brivio
parent 469b69aaa1
commit 98031bee73
1 changed files with 4 additions and 0 deletions
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4
test/nstool.c
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@ -68,6 +68,7 @@ struct holder_info {
pid_t pid;
uid_t uid;
gid_t gid;
char cwd[PATH_MAX];
};
static void usage(void)
@ -175,6 +176,8 @@ static void cmd_hold(int argc, char *argv[])
info.pid = getpid();
info.uid = getuid();
info.gid = getgid();
if (!getcwd(info.cwd, sizeof(info.cwd)))
die("getcwd(): %s\n", strerror(errno));
do {
int afd = accept(fd, NULL, NULL);
@ -312,6 +315,7 @@ static void cmd_info(int argc, char *argv[])
printf("\tPID:\t%d\n", info.pid);
printf("\tUID:\t%u\n", info.uid);
printf("\tGID:\t%u\n", info.gid);
printf("\tCWD:\t%s\n", info.cwd);
}
}