1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
|
/* path.c - return a pathname */
#ifndef lint
static char ident[] = "@(#)$Id: path.c,v 1.6 1992/12/15 00:20:22 jromine Exp $";
#endif /* lint */
#include "../h/mh.h"
#include <stdio.h>
#define CWD "./"
#define NCWD (sizeof CWD - 1)
#define DOT "."
#define DOTDOT ".."
#define PWD "../"
#define NPWD (sizeof PWD - 1)
static char *pwds;
static char *expath ();
static compath();
char *path (name, flag)
register char *name;
register int flag;
{
register char *cp,
*ep;
if ((cp = expath (name, flag))
&& (ep = cp + strlen (cp) - 1) > cp
&& *ep == '/')
*ep = 0;
return cp;
}
/* */
static char *expath (name, flag)
register char *name;
register int flag;
{
register char *cp,
*ep;
char buffer[BUFSIZ];
if (flag == TSUBCWF) {
(void) sprintf (buffer, "%s/%s", m_getfolder (), name);
name = m_mailpath (buffer);
compath (name);
(void) sprintf (buffer, "%s/", m_maildir (""));
if (ssequal (buffer, name)) {
cp = name;
name = getcpy (name + strlen (buffer));
free (cp);
}
flag = TFOLDER;
}
if (*name == '/'
|| (flag == TFOLDER
&& (strncmp (name, CWD, NCWD)
&& strcmp (name, DOT)
&& strcmp (name, DOTDOT)
&& strncmp (name, PWD, NPWD))))
return getcpy (name);
if (pwds == NULL)
pwds = pwd ();
if (strcmp (name, DOT) == 0 || strcmp (name, CWD) == 0)
return getcpy (pwds);
ep = pwds + strlen (pwds);
if ((cp = rindex (pwds, '/')) == NULL)
cp = ep;
else
if (cp == pwds)
cp++;
if (strncmp (name, CWD, NCWD) == 0)
name += NCWD;
if (strcmp (name, DOTDOT) == 0 || strcmp (name, PWD) == 0) {
(void) sprintf (buffer, "%.*s", cp - pwds, pwds);
return getcpy (buffer);
}
if (strncmp (name, PWD, NPWD) == 0)
name += NPWD;
else
cp = ep;
(void) sprintf (buffer, "%.*s/%s", cp - pwds, pwds, name);
return getcpy (buffer);
}
/* */
static compath (f)
register char *f;
{
register char *cp,
*dp;
if (*f != '/')
return;
for (cp = f; *cp;)
if (*cp == '/') {
switch (*++cp) {
case 0:
if (--cp > f)
*cp = 0;
break;
case '/':
for (dp = cp; *dp == '/'; dp++)
continue;
(void) strcpy (cp--, dp);
continue;
case '.':
if (strcmp (cp, DOT) == 0) {
if (cp > f + 1)
cp--;
*cp = 0;
break;
}
if (strcmp (cp, DOTDOT) == 0) {
for (cp -= 2; cp > f; cp--)
if (*cp == '/')
break;
if (cp <= f)
cp = f + 1;
*cp = 0;
break;
}
if (strncmp (cp, PWD, NPWD) == 0) {
for (dp = cp - 2; dp > f; dp--)
if (*dp == '/')
break;
if (dp <= f)
dp = f;
(void) strcpy (dp, cp + NPWD - 1);
cp = dp;
continue;
}
if (strncmp (cp, CWD, NCWD) == 0) {
(void) strcpy (cp - 1, cp + NCWD - 1);
cp--;
continue;
}
continue;
default:
cp++;
continue;
}
break;
}
else
cp++;
}
|