Actual source code: fpath.c

petsc-3.5.1 2014-07-24
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  2: /*
  3:       Code for opening and closing files.
  4: */
  5: #include <petscsys.h>
  6: #if defined(PETSC_HAVE_PWD_H)
  7: #include <pwd.h>
  8: #endif

 12: /*@C
 13:    PetscGetFullPath - Given a filename, returns the fully qualified file name.

 15:    Not Collective

 17:    Input Parameters:
 18: +  path     - pathname to qualify
 19: .  fullpath - pointer to buffer to hold full pathname
 20: -  flen     - size of fullpath

 22:    Level: developer

 24:    Concepts: full path
 25:    Concepts: path^full

 27: .seealso: PetscGetRelativePath()
 28: @*/
 29: PetscErrorCode  PetscGetFullPath(const char path[],char fullpath[],size_t flen)
 30: {
 32:   size_t         ln;
 33:   PetscBool      flg;

 36:   if (path[0] == '/') {
 37:     PetscStrncmp("/tmp_mnt/",path,9,&flg);
 38:     if (flg) {PetscStrncpy(fullpath,path + 8,flen);}
 39:     else     {PetscStrncpy(fullpath,path,flen);}
 40:     fullpath[flen-1] = 0;
 41:     return(0);
 42:   }

 44:   PetscStrncpy(fullpath,path,flen);
 45:   fullpath[flen-1] = 0;
 46:   /* Remove the various "special" forms (~username/ and ~/) */
 47:   if (fullpath[0] == '~') {
 48:     char tmppath[PETSC_MAX_PATH_LEN],*rest;
 49:     if (fullpath[1] == '/') {
 50:       PetscGetHomeDirectory(tmppath,PETSC_MAX_PATH_LEN);
 51:       rest = fullpath + 2;
 52:     } else {
 53: #if defined(PETSC_HAVE_PWD_H)
 54:       struct passwd  *pwde;
 55:       char *p,*name;

 57:       /* Find username */
 58:       name = fullpath + 1;
 59:       p    = name;
 60:       while (*p && *p != '/') p++;
 61:       *p   = 0;
 62:       rest = p + 1;
 63:       pwde = getpwnam(name);
 64:       if (!pwde) return(0);

 66:       PetscStrcpy(tmppath,pwde->pw_dir);
 67: #else
 68:       return(0);
 69: #endif
 70:     }
 71:     PetscStrlen(tmppath,&ln);
 72:     if (tmppath[ln-1] != '/') {PetscStrcat(tmppath+ln-1,"/");}
 73:     PetscStrcat(tmppath,rest);
 74:     PetscStrncpy(fullpath,tmppath,flen);
 75:     fullpath[flen-1] = 0;
 76:   } else {
 77:     PetscGetWorkingDirectory(fullpath,flen);
 78:     PetscStrlen(fullpath,&ln);
 79:     PetscStrncpy(fullpath+ln,"/",flen - ln);
 80:     fullpath[flen-1] = 0;
 81:     PetscStrlen(fullpath,&ln);
 82:     if (path[0] == '.' && path[1] == '/') {
 83:       PetscStrncat(fullpath,path+2,flen - ln - 1);
 84:     } else {
 85:       PetscStrncat(fullpath,path,flen - ln - 1);
 86:     }
 87:     fullpath[flen-1] = 0;
 88:   }

 90:   /* Remove the automounter part of the path */
 91:   PetscStrncmp(fullpath,"/tmp_mnt/",9,&flg);
 92:   if (flg) {
 93:     char tmppath[PETSC_MAX_PATH_LEN];
 94:     PetscStrcpy(tmppath,fullpath + 8);
 95:     PetscStrcpy(fullpath,tmppath);
 96:   }
 97:   /* We could try to handle things like the removal of .. etc */
 98:   return(0);
 99: }