src/shared/parse-helpers.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "log.h"
   4 #include "parse-helpers.h"
   5 #include "path-util.h"
   6 #include "utf8.h"
   7
   8 int path_simplify_and_warn(
   9                 char *path,
  10                 unsigned flag,
  11                 const char *unit,
  12                 const char *filename,
  13                 unsigned line,
  14                 const char *lvalue) {
  15
  16         bool fatal = flag & PATH_CHECK_FATAL;
  17
  18         assert(!FLAGS_SET(flag, PATH_CHECK_ABSOLUTE | PATH_CHECK_RELATIVE));
  19
  20         if (!utf8_is_valid(path))
  21                 return log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, path);
  22
  23         if (flag & (PATH_CHECK_ABSOLUTE | PATH_CHECK_RELATIVE)) {
  24                 bool absolute;
  25
  26                 absolute = path_is_absolute(path);
  27
  28                 if (!absolute && (flag & PATH_CHECK_ABSOLUTE))
  29                         return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL),
  30                                           "%s= path is not absolute%s: %s",
  31                                           lvalue, fatal ? "" : ", ignoring", path);
  32
  33                 if (absolute && (flag & PATH_CHECK_RELATIVE))
  34                         return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL),
  35                                           "%s= path is absolute%s: %s",
  36                                           lvalue, fatal ? "" : ", ignoring", path);
  37         }
  38
  39         path_simplify(path);
  40
  41         if (!path_is_valid(path))
  42                 return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL),
  43                                   "%s= path has invalid length (%zu bytes)%s.",
  44                                   lvalue, strlen(path), fatal ? "" : ", ignoring");
  45
  46         if (!path_is_normalized(path))
  47                 return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL),
  48                                   "%s= path is not normalized%s: %s",
  49                                   lvalue, fatal ? "" : ", ignoring", path);
  50
  51         return 0;
  52 }