On Mon, Oct 10, 2022 at 10:35:47AM +0200, Stefano Brivio wrote:
> Add a --version option displaying that, and also include this
> information in the log files.
> 
> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

> ---
>  Makefile                  | 3 +++
>  conf.c                    | 8 ++++++++
>  contrib/fedora/passt.spec | 1 +
>  log.c                     | 4 ++--
>  passt.1                   | 4 ++++
>  util.h                    | 8 ++++++++
>  6 files changed, 26 insertions(+), 2 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index e4c64fe..6b22408 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -9,6 +9,8 @@
>  # Copyright (c) 2021 Red Hat GmbH
>  # Author: Stefano Brivio <sbrivio@redhat.com>
>  
> +VERSION ?= $(shell git describe --tags HEAD 2>/dev/null || echo "unknown\ version")
> +
>  RLIMIT_STACK_VAL := $(shell /bin/sh -c 'ulimit -s')
>  ifeq ($(RLIMIT_STACK_VAL),unlimited)
>  RLIMIT_STACK_VAL := 1024
> @@ -31,6 +33,7 @@ FLAGS += -DNETNS_RUN_DIR=\"/run/netns\"
>  FLAGS += -DPASST_AUDIT_ARCH=AUDIT_ARCH_$(AUDIT_ARCH)
>  FLAGS += -DRLIMIT_STACK_VAL=$(RLIMIT_STACK_VAL)
>  FLAGS += -DARCH=\"$(TARGET_ARCH)\"
> +FLAGS += -DVERSION=\"$(VERSION)\"
>  
>  PASST_SRCS = arch.c arp.c checksum.c conf.c dhcp.c dhcpv6.c icmp.c igmp.c \
>  	isolation.c lineread.c log.c mld.c ndp.c netlink.c packet.c passt.c \
> diff --git a/conf.c b/conf.c
> index f22940b..7c3e346 100644
> --- a/conf.c
> +++ b/conf.c
> @@ -626,6 +626,7 @@ static void usage(const char *name)
>  	}
>  	info("");
>  
> +
>  	info(   "  -d, --debug		Be verbose, don't run in background");
>  	info(   "      --trace		Be extra verbose, implies --debug");
>  	info(   "  -q, --quiet		Don't print informational messages");
> @@ -640,6 +641,7 @@ static void usage(const char *name)
>  	info(   "    numeric, or login and group names");
>  	info(   "    default: drop to user \"nobody\"");
>  	info(   "  -h, --help		Display this help message and exit");
> +	info(   "  --version		Show version and exit");
>  
>  	if (strstr(name, "pasta")) {
>  		info(   "  -I, --ns-ifname NAME	namespace interface name");
> @@ -1039,6 +1041,7 @@ void conf(struct ctx *c, int argc, char **argv)
>  		{"trace",	no_argument,		NULL,		11 },
>  		{"runas",	required_argument,	NULL,		12 },
>  		{"log-size",	required_argument,	NULL,		13 },
> +		{"version",	no_argument,		NULL,		14 },
>  		{ 0 },
>  	};
>  	struct get_bound_ports_ns_arg ns_ports_arg = { .c = c };
> @@ -1197,6 +1200,11 @@ void conf(struct ctx *c, int argc, char **argv)
>  				usage(argv[0]);
>  			}
>  			break;
> +		case 14:
> +			fprintf(stdout,
> +				c->mode == MODE_PASST ? "passt " : "pasta ");
> +			fprintf(stdout, VERSION_BLOB);
> +			exit(EXIT_SUCCESS);
>  		case 'd':
>  			if (c->debug) {
>  				err("Multiple --debug options given");
> diff --git a/contrib/fedora/passt.spec b/contrib/fedora/passt.spec
> index bd60650..f441f5c 100644
> --- a/contrib/fedora/passt.spec
> +++ b/contrib/fedora/passt.spec
> @@ -48,6 +48,7 @@ This package adds SELinux enforcement to passt(1) and pasta(1).
>  %setup -q -n passt-%{git_hash}
>  
>  %build
> +%global optflags %{optflags} -DVERSION=\"%{version}-%{release}.%{_arch}\"
>  %set_build_flags
>  %make_build
>  
> diff --git a/log.c b/log.c
> index 993c617..468c730 100644
> --- a/log.c
> +++ b/log.c
> @@ -172,7 +172,7 @@ void passt_vsyslog(int pri, const char *format, va_list ap)
>  }
>  
>  /**
> - * logfile_init() - Open log file and write header with PID and path
> + * logfile_init() - Open log file and write header with PID, version, path
>   * @name:	Identifier for header: passt or pasta
>   * @path:	Path to log file
>   * @size:	Maximum size of log file: log_cut_size is calculatd here
> @@ -196,7 +196,7 @@ void logfile_init(const char *name, const char *path, size_t size)
>  
>  	log_size = size ? size : LOGFILE_SIZE_DEFAULT;
>  
> -	n = snprintf(log_header, sizeof(log_header), "%s: %s (%i)",
> +	n = snprintf(log_header, sizeof(log_header), "%s " VERSION ": %s (%i)",
>  		     name, exe, getpid());
>  
>  	if (write(log_file, log_header, n) <= 0 ||
> diff --git a/passt.1 b/passt.1
> index 64236b6..667c1bc 100644
> --- a/passt.1
> +++ b/passt.1
> @@ -124,6 +124,10 @@ Default is to change to user \fInobody\fR if started as root.
>  .BR \-h ", " \-\-help
>  Display a help message and exit.
>  
> +.TP
> +.BR \-\-version
> +Show version and exit.
> +
>  .TP
>  .BR \-p ", " \-\-pcap " " \fIfile
>  Capture tap-facing (that is, guest-side or namespace-side) network packets to
> diff --git a/util.h b/util.h
> index 1adbf04..f9a8ec6 100644
> --- a/util.h
> +++ b/util.h
> @@ -6,6 +6,14 @@
>  #ifndef UTIL_H
>  #define UTIL_H
>  
> +#define VERSION_BLOB							       \
> +	VERSION "\n"							       \
> +	"Copyright Red Hat\n"						       \
> +	"GNU Affero GPL version 3 or later "				       \
> +	"<https://www.gnu.org/licenses/agpl-3.0.html>\n"		       \
> +	"This is free software: you are free to change and redistribute it.\n" \
> +	"There is NO WARRANTY, to the extent permitted by law.\n\n"
> +
>  #ifndef SECCOMP_RET_KILL_PROCESS
>  #define SECCOMP_RET_KILL_PROCESS	SECCOMP_RET_KILL
>  #endif

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson