src/analyze/analyze-compare-versions.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <stdio.h>
   4
   5 #include "analyze-compare-versions.h"
   6 #include "compare-operator.h"
   7 #include "macro.h"
   8 #include "string-util.h"
   9 #include "strv.h"
  10
  11 int verb_compare_versions(int argc, char *argv[], void *userdata) {
  12         const char *v1 = ASSERT_PTR(argv[1]), *v2 = ASSERT_PTR(argv[argc-1]);
  13         int r;
  14
  15         assert(IN_SET(argc, 3, 4));
  16         assert(argv);
  17
  18         /* We only output a warning on invalid version strings (instead of failing), since the comparison
  19          * functions try to handle invalid strings gracefully and it's still interesting to see what the
  20          * comparison result will be. */
  21         if (!version_is_valid_versionspec(v1))
  22                 log_warning("Version string 1 contains disallowed characters, they will be treated as separators: %s", v1);
  23         if (!version_is_valid_versionspec(v2))
  24                 log_warning("Version string 2 contains disallowed characters, they will be treated as separators: %s", v2);
  25
  26         if (argc == 3) {
  27                 r = strverscmp_improved(v1, v2);
  28                 printf("%s %s %s\n",
  29                        isempty(v1) ? "''" : v1,
  30                        comparison_operator(r),
  31                        isempty(v2) ? "''" : v2);
  32
  33                 /* This matches the exit convention used by rpmdev-vercmp.
  34                  * We don't use named values because 11 and 12 don't have names. */
  35                 return r < 0 ? 12 : r > 0 ? 11 : 0;
  36
  37         } else {
  38                 const char *op = ASSERT_PTR(argv[2]);
  39                 CompareOperator operator;
  40                 assert(argc == 4);
  41
  42                 operator = parse_compare_operator(&op, COMPARE_ALLOW_TEXTUAL);
  43                 if (operator < 0 || !isempty(op))
  44                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown operator \"%s\".", op);
  45
  46                 r = version_or_fnmatch_compare(operator, v1, v2);
  47                 if (r < 0)
  48                         return log_error_errno(r, "Failed to compare versions: %m");
  49
  50                 return r ? EXIT_SUCCESS : EXIT_FAILURE;
  51         }
  52 }