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Imported from ../bash-3.0.tar.gz.

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This commit is contained in:
Jari Aalto 2004-07-27 13:29:18 +00:00
commit b80f6443b6
400 changed files with 69247 additions and 13346 deletions
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48
lib/sh/pathphys.c
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@ -68,7 +68,7 @@ _path_readlink (path, buf, bufsiz)
/*
* Return PATH with all symlinks expanded in newly-allocated memory.
* This always gets a full pathname.
* This always gets an absolute pathname.
*/
char *
@ -80,11 +80,26 @@ sh_physpath (path, flags)
char *result, *p, *q, *qsave, *qbase, *workpath;
int double_slash_path, linklen, nlink;
linklen = strlen (path);
#if 0
/* First sanity check -- punt immediately if the name is too long. */
if (linklen >= PATH_MAX)
return (savestring (path));
#endif
nlink = 0;
q = result = (char *)xmalloc (PATH_MAX + 1);
workpath = (char *)xmalloc (PATH_MAX + 1);
strcpy (workpath, path);
/* Even if we get something longer than PATH_MAX, we might be able to
shorten it, so we try. */
if (linklen >= PATH_MAX)
workpath = savestring (path);
else
{
workpath = (char *)xmalloc (PATH_MAX + 1);
strcpy (workpath, path);
}
/* This always gets an absolute pathname. */
@ -133,7 +148,19 @@ sh_physpath (path, flags)
if (q != qbase)
*q++ = DIRSEP;
while (*p && (ISDIRSEP(*p) == 0))
*q++ = *p++;
{
if (q - result >= PATH_MAX)
{
#ifdef ENAMETOOLONG
errno = ENAMETOOLONG;
#else
errno = EINVAL;
#endif
goto error;
}
*q++ = *p++;
}
*q = '\0';
@ -151,6 +178,8 @@ sh_physpath (path, flags)
{
#ifdef ELOOP
errno = ELOOP;
#else
errno = EINVAL;
#endif
error:
free (result);
@ -160,6 +189,17 @@ error:
linkbuf[linklen] = '\0';
/* If the new path length would overrun PATH_MAX, punt now. */
if ((strlen (p) + linklen + 2) >= PATH_MAX)
{
#ifdef ENAMETOOLONG
errno = ENAMETOOLONG;
#else
errno = EINVAL;
#endif
goto error;
}
/* Form the new pathname by copying the link value to a temporary
buffer and appending the rest of `workpath'. Reset p to point
to the start of the rest of the path. If the link value is an