Actual source code: fpath.c

petsc-3.12.1 2019-10-22
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  2:  #include <petscsys.h>
  3: #if defined(PETSC_HAVE_PWD_H)
  4: #include <pwd.h>
  5: #endif

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

 10:    Not Collective

 12:    Input Parameters:
 13: +  path     - pathname to qualify
 14: .  fullpath - pointer to buffer to hold full pathname
 15: -  flen     - size of fullpath

 17:    Level: developer


 20: .seealso: PetscGetRelativePath()
 21: @*/
 22: PetscErrorCode  PetscGetFullPath(const char path[],char fullpath[],size_t flen)
 23: {
 25:   size_t         ln;
 26:   PetscBool      flg;

 29:   if (path[0] == '/') {
 30:     PetscStrncmp("/tmp_mnt/",path,9,&flg);
 31:     if (flg) {PetscStrncpy(fullpath,path + 8,flen);}
 32:     else     {PetscStrncpy(fullpath,path,flen);}
 33:     fullpath[flen-1] = 0;
 34:     return(0);
 35:   }

 37:   PetscStrncpy(fullpath,path,flen);
 38:   fullpath[flen-1] = 0;
 39:   /* Remove the various "special" forms (~username/ and ~/) */
 40:   if (fullpath[0] == '~') {
 41:     char tmppath[PETSC_MAX_PATH_LEN],*rest;
 42:     if (fullpath[1] == '/') {
 43:       PetscGetHomeDirectory(tmppath,PETSC_MAX_PATH_LEN);
 44:       rest = fullpath + 2;
 45:     } else {
 46: #if defined(PETSC_HAVE_PWD_H)
 47:       struct passwd  *pwde;
 48:       char *p,*name;

 50:       /* Find username */
 51:       name = fullpath + 1;
 52:       p    = name;
 53:       while (*p && *p != '/') p++;
 54:       *p   = 0;
 55:       rest = p + 1;
 56:       pwde = getpwnam(name);
 57:       if (!pwde) return(0);

 59:       PetscStrcpy(tmppath,pwde->pw_dir);
 60: #else
 61:       return(0);
 62: #endif
 63:     }
 64:     PetscStrlen(tmppath,&ln);
 65:     if (tmppath[ln-1] != '/') {PetscStrcat(tmppath+ln-1,"/");}
 66:     PetscStrcat(tmppath,rest);
 67:     PetscStrncpy(fullpath,tmppath,flen);
 68:     fullpath[flen-1] = 0;
 69:   } else {
 70:     PetscGetWorkingDirectory(fullpath,flen);
 71:     PetscStrlen(fullpath,&ln);
 72:     PetscStrncpy(fullpath+ln,"/",flen - ln);
 73:     fullpath[flen-1] = 0;
 74:     PetscStrlen(fullpath,&ln);
 75:     if (path[0] == '.' && path[1] == '/') {
 76:       PetscStrlcat(fullpath,path+2,flen);
 77:     } else {
 78:       PetscStrlcat(fullpath,path,flen);
 79:     }
 80:     fullpath[flen-1] = 0;
 81:   }

 83:   /* Remove the automounter part of the path */
 84:   PetscStrncmp(fullpath,"/tmp_mnt/",9,&flg);
 85:   if (flg) {
 86:     char tmppath[PETSC_MAX_PATH_LEN];
 87:     PetscStrcpy(tmppath,fullpath + 8);
 88:     PetscStrcpy(fullpath,tmppath);
 89:   }
 90:   /* We could try to handle things like the removal of .. etc */
 91:   return(0);
 92: }