mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
48 lines
2.6 KiB
C
48 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/intrin/safemacros.internal.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/mem/mem.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/str/str.h"
|
|
|
|
/**
|
|
* Replaces tilde in path w/ user home folder.
|
|
*
|
|
* @param path is NULL propagating
|
|
* @return must be free()'d
|
|
*/
|
|
char *replaceuser(const char *path) {
|
|
char *res, *p;
|
|
const char *home;
|
|
size_t pathlen, homelen;
|
|
res = NULL;
|
|
if (path && *path++ == '~' && !isempty((home = getenv("HOME")))) {
|
|
while (*path == '/') path++;
|
|
pathlen = strlen(path);
|
|
homelen = strlen(home);
|
|
while (homelen && home[homelen - 1] == '/') homelen--;
|
|
if ((p = res = malloc(pathlen + 1 + homelen + 1))) {
|
|
p = mempcpy(p, home, homelen);
|
|
*p++ = '/';
|
|
memcpy(p, path, pathlen + 1);
|
|
}
|
|
}
|
|
return res;
|
|
}
|