summaryrefslogtreecommitdiffstats
path: root/src/global/mail_version.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/global/mail_version.c')
-rw-r--r--src/global/mail_version.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/src/global/mail_version.c b/src/global/mail_version.c
new file mode 100644
index 0000000..0ded035
--- /dev/null
+++ b/src/global/mail_version.c
@@ -0,0 +1,258 @@
+/*++
+/* NAME
+/* mail_version 3
+/* SUMMARY
+/* time-dependent probe sender addresses
+/* SYNOPSIS
+/* #include <mail_version.h>
+/*
+/* typedef struct {
+/* char *program; /* postfix */
+/* int major; /* 2 */
+/* int minor; /* 9 */
+/* int patch; /* patchlevel or -1 */
+/* char *snapshot; /* null or snapshot info */
+/* } MAIL_VERSION;
+/*
+/* MAIL_VERSION *mail_version_parse(version_string, why)
+/* const char *version_string;
+/* const char **why;
+/*
+/* void mail_version_free(mp)
+/* MAIL_VERSION *mp;
+/*
+/* const char *get_mail_version()
+/*
+/* int check_mail_version(version_string)
+/* const char *version_string;
+/* DESCRIPTION
+/* This module understands the format of Postfix version strings
+/* (for example the default value of "mail_version"), and
+/* provides support to compare the compile-time version of a
+/* Postfix program with the run-time version of a Postfix
+/* library. Apparently, some distributions don't use proper
+/* so-number versioning, causing programs to fail erratically
+/* after an update replaces the library but not the program.
+/*
+/* A Postfix version string consists of two or three parts
+/* separated by a single "-" character:
+/* .IP \(bu
+/* The first part is a string with the program name.
+/* .IP \(bu
+/* The second part is the program version: either two or three
+/* non-negative integer numbers separated by single "."
+/* character. Stable releases have a major version, minor
+/* version and patchlevel; experimental releases (snapshots)
+/* have only major and minor version numbers.
+/* .IP \(bu
+/* The third part is ignored with a stable release, otherwise
+/* it is a string with the snapshot release date plus some
+/* optional information.
+/*
+/* mail_version_parse() parses a version string.
+/*
+/* get_mail_version() returns the version string (the value
+/* of DEF_MAIL_VERSION) that is compiled into the library.
+/*
+/* check_mail_version() compares the caller's version string
+/* (usually the value of DEF_MAIL_VERSION) that is compiled
+/* into the caller, and logs a warning when the strings differ.
+/* DIAGNOSTICS
+/* In the case of a parsing error, mail_version_parse() returns
+/* a null pointer, and sets the why argument to a string with
+/* problem details.
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <stdlib.h>
+#include <errno.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <mymalloc.h>
+#include <stringops.h>
+#include <split_at.h>
+
+/* Global library. */
+
+#include <mail_version.h>
+
+/* mail_version_int - convert integer */
+
+static int mail_version_int(const char *strval)
+{
+ char *end;
+ int intval;
+ long longval;
+
+ errno = 0;
+ intval = longval = strtol(strval, &end, 10);
+ if (*strval == 0 || *end != 0 || errno == ERANGE || longval != intval)
+ intval = (-1);
+ return (intval);
+}
+
+/* mail_version_worker - do the parsing work */
+
+static const char *mail_version_worker(MAIL_VERSION *mp, char *cp)
+{
+ char *major_field;
+ char *minor_field;
+ char *patch_field;
+
+ /*
+ * Program name.
+ */
+ if ((mp->program = mystrtok(&cp, "-")) == 0)
+ return ("no program name");
+
+ /*
+ * Major, minor, patchlevel. If this is a stable release, then we ignore
+ * text after the patchlevel, in case there are vendor extensions.
+ */
+ if ((major_field = mystrtok(&cp, "-")) == 0)
+ return ("missing major version");
+
+ if ((minor_field = split_at(major_field, '.')) == 0)
+ return ("missing minor version");
+ if ((mp->major = mail_version_int(major_field)) < 0)
+ return ("bad major version");
+ patch_field = split_at(minor_field, '.');
+ if ((mp->minor = mail_version_int(minor_field)) < 0)
+ return ("bad minor version");
+
+ if (patch_field == 0)
+ mp->patch = -1;
+ else if ((mp->patch = mail_version_int(patch_field)) < 0)
+ return ("bad patchlevel");
+
+ /*
+ * Experimental release. If this is not a stable release, we take
+ * everything to the end of the string.
+ */
+ if (patch_field != 0)
+ mp->snapshot = 0;
+ else if ((mp->snapshot = mystrtok(&cp, "")) == 0)
+ return ("missing snapshot field");
+
+ return (0);
+}
+
+/* mail_version_parse - driver */
+
+MAIL_VERSION *mail_version_parse(const char *string, const char **why)
+{
+ MAIL_VERSION *mp;
+ char *saved_string;
+ const char *err;
+
+ mp = (MAIL_VERSION *) mymalloc(sizeof(*mp));
+ saved_string = mystrdup(string);
+ if ((err = mail_version_worker(mp, saved_string)) != 0) {
+ *why = err;
+ myfree(saved_string);
+ myfree((void *) mp);
+ return (0);
+ } else {
+ return (mp);
+ }
+}
+
+/* mail_version_free - destroy version information */
+
+void mail_version_free(MAIL_VERSION *mp)
+{
+ myfree(mp->program);
+ myfree((void *) mp);
+}
+
+/* get_mail_version - return parsed mail version string */
+
+const char *get_mail_version(void)
+{
+ return (DEF_MAIL_VERSION);
+}
+
+/* check_mail_version - compare caller version with library version */
+
+void check_mail_version(const char *version_string)
+{
+ if (strcmp(version_string, DEF_MAIL_VERSION) != 0)
+ msg_warn("Postfix library version mis-match: wanted %s, found %s",
+ version_string, DEF_MAIL_VERSION);
+}
+
+#ifdef TEST
+
+#include <unistd.h>
+#include <vstring.h>
+#include <vstream.h>
+#include <vstring_vstream.h>
+
+#define STR(x) vstring_str(x)
+
+/* parse_sample - parse a sample string from argv or stdin */
+
+static void parse_sample(const char *sample)
+{
+ MAIL_VERSION *mp;
+ const char *why;
+
+ mp = mail_version_parse(sample, &why);
+ if (mp == 0) {
+ vstream_printf("ERROR: %s: %s\n", sample, why);
+ } else {
+ vstream_printf("program: %s\t", mp->program);
+ vstream_printf("major: %d\t", mp->major);
+ vstream_printf("minor: %d\t", mp->minor);
+ if (mp->patch < 0)
+ vstream_printf("snapshot: %s\n", mp->snapshot);
+ else
+ vstream_printf("patch: %d\n", mp->patch);
+ mail_version_free(mp);
+ }
+ vstream_fflush(VSTREAM_OUT);
+}
+
+/* main - the main program */
+
+int main(int argc, char **argv)
+{
+ VSTRING *inbuf = vstring_alloc(1);
+ int have_tty = isatty(0);
+
+ if (argc > 1) {
+ while (--argc > 0 && *++argv)
+ parse_sample(*argv);
+ } else {
+ for (;;) {
+ if (have_tty) {
+ vstream_printf("> ");
+ vstream_fflush(VSTREAM_OUT);
+ }
+ if (vstring_fgets_nonl(inbuf, VSTREAM_IN) <= 0)
+ break;
+ if (have_tty == 0)
+ vstream_printf("> %s\n", STR(inbuf));
+ if (*STR(inbuf) == 0 || *STR(inbuf) == '#')
+ continue;
+ parse_sample(STR(inbuf));
+ }
+ }
+ vstring_free(inbuf);
+ return (0);
+}
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-09 06:33:40 +0000