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util: New function set_program_name_version().

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With this function, users of the Open vSwitch libraries which
should not have the same version as Open vSwitch will have their
version displayed in unixctl and at the command line.

Signed-off-by: Ethan Jackson <ethan@nicira.com>
This commit is contained in:
Ethan Jackson
2012-04-06 11:47:51 -07:00
parent 2b540ecba2
commit e385ef551a
2 changed files with 21 additions and 6 deletions
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22
lib/util.c
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@@ -284,21 +284,35 @@ ovs_retval_to_string(int retval)
* be called at the beginning of main() with "argv[0]" as the argument
* to 'argv0'.
*
* 'version' should contain the version of the caller's program. If 'version'
* is the same as the VERSION #define, the caller is assumed to be part of Open
* vSwitch. Otherwise, it is assumed to be an external program linking against
* the Open vSwitch libraries.
*
* The 'date' and 'time' arguments should likely be called with
* "__DATE__" and "__TIME__" to use the time the binary was built.
* Alternatively, the "set_program_name" macro may be called to do this
* automatically.
*/
void
set_program_name__(const char *argv0, const char *date, const char *time)
set_program_name__(const char *argv0, const char *version, const char *date,
const char *time)
{
const char *slash = strrchr(argv0, '/');
program_name = slash ? slash + 1 : argv0;
free(program_version);
program_version = xasprintf("%s (Open vSwitch) "VERSION"\n"
"Compiled %s %s\n",
program_name, date, time);
if (!strcmp(version, VERSION)) {
program_version = xasprintf("%s (Open vSwitch) "VERSION"\n"
"Compiled %s %s\n",
program_name, date, time);
} else {
program_version = xasprintf("%s %s\n"
"Open vSwitch Library "VERSION"\n"
"Compiled %s %s\n",
program_name, version, date, time);
}
}
/* Returns a pointer to a string describing the program version. The