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conf: Add -P, --pid, to specify a file where own PID is written to

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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2021-10-14 12:17:47 +02:00
parent 1cbd2c8c6b
commit 54a19002df
4 changed files with 48 additions and 3 deletions

19
conf.c
View file

@ -565,6 +565,7 @@ static void usage(const char *name)
else
info(" /tmp/passt_ISO8601-TIMESTAMP_INSTANCE-NUMBER.pcap");
info( " -P, --pid FILE Write own PID to the given file");
info( " -m, --mtu MTU Assign MTU via DHCP/NDP");
info( " a zero value disables assignment");
info( " default: 65520: maximum 802.3 MTU minus 802.3 header");
@ -764,6 +765,7 @@ void conf(struct ctx *c, int argc, char **argv)
{"socket", required_argument, NULL, 's' },
{"ns-ifname", required_argument, NULL, 'I' },
{"pcap", optional_argument, NULL, 'p' },
{"pid", required_argument, NULL, 'P' },
{"mtu", required_argument, NULL, 'm' },
{"address", required_argument, NULL, 'a' },
{"netmask", required_argument, NULL, 'n' },
@ -807,9 +809,9 @@ void conf(struct ctx *c, int argc, char **argv)
const char *optstring;
if (c->mode == MODE_PASST)
optstring = "dqfehs:p::m:a:n:M:g:i:D::S::46t:u:";
optstring = "dqfehs:p::P:m:a:n:M:g:i:D::S::46t:u:";
else
optstring = "dqfehI:p::m:a:n:M:g:i:D::S::46t:u:T:U:";
optstring = "dqfehI:p::P:m:a:n:M:g:i:D::S::46t:u:T:U:";
name = getopt_long(argc, argv, optstring, options, NULL);
@ -949,6 +951,19 @@ void conf(struct ctx *c, int argc, char **argv)
usage(argv[0]);
}
break;
case 'P':
if (*c->pid_file) {
err("Multiple --pid options given");
usage(argv[0]);
}
ret = snprintf(c->pid_file, sizeof(c->pid_file), "%s",
optarg);
if (ret <= 0 || ret >= (int)sizeof(c->pid_file)) {
err("Invalid PID file: %s", optarg);
usage(argv[0]);
}
break;
case 'm':
if (c->mtu) {
err("Multiple --mtu options given");