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* fileutil.c (untilde): New. Expand ~/foo and ~username/foo filenames

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into full paths using $HOME if possible, or getpwuid/getpwnam if
necessary. (make_filename): Use it here.
This commit is contained in:
David Shaw 2005-08-31 15:36:50 +00:00
parent f74282bee0
commit cb00951803
4 changed files with 82 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

76
util/fileutil.c
View file

@ -1,5 +1,5 @@
/* fileutil.c - file utilities
* Copyright (C) 1998, 2003 Free Software Foundation, Inc.
* Copyright (C) 1998, 2003, 2005 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
@ -26,6 +26,10 @@
#include <string.h>
#include <assert.h>
#include <unistd.h>
#include <sys/types.h>
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include "util.h"
#include "memory.h"
#include "ttyio.h"
@ -88,7 +92,62 @@ make_dirname(const char *filepath)
return dirname;
}
/* Expand tildes. Handles both the ~/foo and ~username/foo cases.
Returns what the tilde expands to. *name is advanced to be past
the tilde expansion. */
static char *
untilde(const char **name)
{
char *home=NULL;
assert((*name)[0]=='~');
if((*name)[1]==DIRSEP_C || (*name)[1]=='\0')
{
/* This is the "~/foo" or "~" case. */
char *tmp=getenv("HOME");
if(tmp)
home=xstrdup(tmp);
#ifdef HAVE_GETPWUID
if(!home)
{
struct passwd *pwd;
pwd=getpwuid(getuid());
if(pwd)
home=xstrdup(pwd->pw_dir);
}
#endif
if(home)
(*name)++;
}
#ifdef HAVE_GETPWNAM
else
{
/* This is the "~username" case. */
char *user,*sep;
struct passwd *pwd;
user=xstrdup((*name)+1);
sep=strchr(user,DIRSEP_C);
if(sep)
*sep='\0';
pwd=getpwnam(user);
if(pwd)
{
home=xstrdup(pwd->pw_dir);
(*name)+=1+strlen(user);
}
xfree(user);
}
#endif
return home;
}
/*
Construct a filename from the NULL terminated list of parts. Tilde
@ -100,7 +159,7 @@ make_filename( const char *first_part, ... )
va_list arg_ptr ;
size_t n;
const char *s;
char *name, *home, *p;
char *name, *p, *home=NULL;
va_start( arg_ptr, first_part ) ;
n = strlen(first_part)+1;
@ -108,19 +167,22 @@ make_filename( const char *first_part, ... )
n += strlen(s) + 1;
va_end(arg_ptr);
home = NULL;
#ifndef __riscos__
if( *first_part == '~' && first_part[1] == DIRSEP_C
&& (home = getenv("HOME")) && *home )
n += strlen(home);
if(*first_part=='~')
{
home=untilde(&first_part);
if(home)
n+=strlen(home);
}
#endif
name = xmalloc(n);
p = home ? stpcpy(stpcpy(name,home), first_part+1)
p = home ? stpcpy(stpcpy(name,home), first_part)
: stpcpy(name, first_part);
va_start( arg_ptr, first_part ) ;
while( (s=va_arg(arg_ptr, const char *)) )
p = stpcpy(stpcpy(p, DIRSEP_S), s);
va_end(arg_ptr);
xfree(home);
#ifndef __riscos__
return name;