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pasta: include errno in error message

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When the open() or setns() calls fails pasta exits early and prints an
error. However it did not include the errno so it was impossible to know
why the syscall failed.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
[sbrivio: Split print to fit 80 columns in pasta_open_ns()]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Paul Holzinger 2023-06-23 12:23:50 +02:00 committed by Stefano Brivio
parent 594dce66d3
commit 32660cea04
1 changed files with 6 additions and 4 deletions
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10
pasta.c
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@ -135,15 +135,17 @@ void pasta_open_ns(struct ctx *c, const char *netns)
int nfd = -1;
nfd = open(netns, O_RDONLY | O_CLOEXEC);
if (nfd < 0)
die("Couldn't open network namespace %s", netns);
if (nfd < 0) {
die("Couldn't open network namespace %s: %s",
netns, strerror(errno));
}
c->pasta_netns_fd = nfd;
NS_CALL(ns_check, c);
if (c->pasta_netns_fd < 0)
die("Couldn't switch to pasta namespaces");
die("Couldn't switch to pasta namespaces: %s", strerror(errno));
if (!c->no_netns_quit) {
char buf[PATH_MAX] = { 0 };
@ -261,7 +263,7 @@ void pasta_start_ns(struct ctx *c, uid_t uid, gid_t gid,
NS_CALL(pasta_wait_for_ns, c);
if (c->pasta_netns_fd < 0)
die("Failed to join network namespace");
die("Failed to join network namespace: %s", strerror(errno));
}
/**