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Add function to parse version string returned by "repmgr --version"

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This commit is contained in:
Ian Barwick
2019-08-06 20:50:27 +09:00
parent 666c6f5140
commit 68be86349b
3 changed files with 43 additions and 0 deletions
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1
repmgr.h
View File

@@ -51,6 +51,7 @@
#define UNKNOWN_SERVER_VERSION_NUM -1
#define UNKNOWN_BDR_VERSION_NUM -1
#define UNKNOWN_REPMGR_VERSION_NUM -1
#define UNKNOWN_TIMELINE_ID -1
#define UNKNOWN_SYSTEM_IDENTIFIER 0

41
sysutils.c
View File

@@ -364,3 +364,44 @@ enable_wal_receiver(PGconn *conn, bool wait_startup)
return wal_receiver_pid;
}
/**
* Parse the string returned by "repmgr --version", e.g. "repmgr 4.1.2",
* and return it as a version integer (e.g. 40102).
*
* This is required for backwards compatibility as versions prior to
* 4.3 do not have the --version-number option.
*/
int
parse_repmgr_version(const char *version_string)
{
int series, major, minor;
int version_integer = UNKNOWN_REPMGR_VERSION_NUM;
PQExpBufferData sscanf_string;
initPQExpBuffer(&sscanf_string);
appendPQExpBuffer(&sscanf_string, "%s ",
progname());
appendPQExpBufferStr(&sscanf_string, "%i.%i.%i");
if (sscanf(version_string, sscanf_string.data, &series, &major, &minor) == 3)
{
version_integer = (series * 10000) + (major * 100) + minor;
}
else
{
resetPQExpBuffer(&sscanf_string);
appendPQExpBuffer(&sscanf_string, "%s ",
progname());
appendPQExpBufferStr(&sscanf_string, "%i.%i");
if (sscanf(version_string, "repmgr %i.%i", &series, &major) == 2)
{
version_integer = (series * 10000) + (major * 100);
}
}
return version_integer;
}

1
sysutils.h
View File

@@ -28,5 +28,6 @@ extern bool remote_command(const char *host, const char *user, const char *comma
extern pid_t disable_wal_receiver(PGconn *conn);
extern pid_t enable_wal_receiver(PGconn *conn, bool wait_startup);
extern int parse_repmgr_version(const char *version_string);
#endif /* _SYSUTILS_H_ */