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Procan: try to find out VSOCK CID only when running as root

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This commit is contained in:
Gerhard Rieger 2023-01-26 10:06:01 +01:00
parent c3719e7603
commit 2a04219dee
2 changed files with 7 additions and 0 deletions
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2
CHANGES
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@ -54,6 +54,8 @@ Corrections:
restrictive mode. Furthermore Silla Rizzoli experienced that Minicom restrictive mode. Furthermore Silla Rizzoli experienced that Minicom
ignores lock files with mode 600, so it is set to 644 now. ignores lock files with mode 600, so it is set to 644 now.
Procan tries to find out VSOCK CID only when running as root
Features: Features:
VSOCK, VSOCK-L support options pf, socktype, prototype (currently VSOCK, VSOCK-L support options pf, socktype, prototype (currently
useless) useless)

5
hostan.c
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@ -112,11 +112,16 @@ static int iffan(FILE *outfile) {
static int vsockan(FILE *outfile) { static int vsockan(FILE *outfile) {
unsigned int cid; unsigned int cid;
int vsock; int vsock;
if (Getuid() != 0) {
return 1;
}
if ((vsock = Open("/dev/vsock", O_RDONLY, 0)) < 0 ) { if ((vsock = Open("/dev/vsock", O_RDONLY, 0)) < 0 ) {
Warn1("open(\"/dev/vsock\", ...): %s", strerror(errno)); Warn1("open(\"/dev/vsock\", ...): %s", strerror(errno));
return -1;
} else if (Ioctl(vsock, IOCTL_VM_SOCKETS_GET_LOCAL_CID, &cid) < 0) { } else if (Ioctl(vsock, IOCTL_VM_SOCKETS_GET_LOCAL_CID, &cid) < 0) {
Warn2("ioctl(%d, IOCTL_VM_SOCKETS_GET_LOCAL_CID, ...): %s", Warn2("ioctl(%d, IOCTL_VM_SOCKETS_GET_LOCAL_CID, ...): %s",
vsock, strerror(errno)); vsock, strerror(errno));
return -1;
} else { } else {
Notice1("VSOCK CID=%u", cid); Notice1("VSOCK CID=%u", cid);
fprintf(outfile, "\nVSOCK_CID = %u\n", cid); fprintf(outfile, "\nVSOCK_CID = %u\n", cid);