core/fs/lib/searchconfig.c

   1 #include <dprintf.h>
   2 #include <fcntl.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <core.h>
   6 #include <fs.h>
   7
   8 __export char ConfigName[FILENAME_MAX];
   9 __export char config_cwd[FILENAME_MAX];
  10
  11 /*
  12  * This searches for a specified set of filenames in a specified set
  13  * of directories.  If found, set the current working directory to
  14  * match.
  15  */
  16 int search_dirs(struct com32_filedata *filedata,
  17                 const char *search_directories[],
  18                 const char *filenames[],
  19                 char *realname)
  20 {
  21     char namebuf[FILENAME_MAX];
  22     const char *sd, **sdp;
  23     const char *sf, **sfp;
  24
  25     for (sdp = search_directories; (sd = *sdp); sdp++) {
  26         for (sfp = filenames; (sf = *sfp); sfp++) {
  27             snprintf(namebuf, sizeof namebuf,
  28                      "%s%s%s",
  29                      sd, (*sd && sd[strlen(sd)-1] == '/') ? "" : "/",
  30                      sf);
  31             if (realpath(realname, namebuf, FILENAME_MAX) == (size_t)-1)
  32                 continue;
  33             dprintf("Config search: %s\n", realname);
  34             if (open_file(realname, O_RDONLY, filedata) >= 0) {
  35                 chdir(sd);
  36                 return 0;       /* Got it */
  37             }
  38         }
  39     }
  40
  41     return -1;
  42 }