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/* $OpenBSD: missing.c,v 1.1 1996/08/14 06:19:11 downsj Exp $ */
/*
* Routines which may be missing on some machines
*/
#include "sh.h"
#include "ksh_stat.h"
#include "ksh_dir.h"
#ifndef HAVE_MEMSET
void *
memset(d, c, n)
void *d;
int c;
size_t n;
{
unsigned char *p = (unsigned char *) d;
/* Not amazingly fast.. */
for (; n > 0; --n)
*p++ = c;
return d;
}
#endif /* !HAVE_MEMSET */
#if !defined(HAVE_MEMMOVE) && !defined(HAVE_BCOPY)
void *
memmove(d, s, n)
void *d;
const void *s;
size_t n;
{
char *dp = (char *) d, *sp = (char *) s;
if (n <= 0)
;
else if (dp < sp)
do
*dp++ = *sp++;
while (--n > 0);
else if (dp > sp) {
dp += n;
sp += n;
do
*--dp = *--sp;
while (--n > 0);
}
return d;
}
#endif /* !HAVE_MEMMOVE && !HAVE_BCOPY */
#ifndef HAVE_STRCASECMP
/*
* Case insensitive string compare routines, same semantics as str[n]cmp()
* (assumes ASCII..).
*/
static const char ichars[256] = {
0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0x40, 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0x60, 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
};
int
strcasecmp(s1, s2)
const char *s1;
const char *s2;
{
const unsigned char *us1 = (const unsigned char *) s1;
const unsigned char *us2 = (const unsigned char *) s2;
while (ichars[*us1] == ichars[*us2++])
if (!*us1++)
return 0;
return ichars[*us1] - ichars[*--us2];
}
int
strncasecmp(s1, s2, n)
const char *s1;
const char *s2;
int n;
{
const unsigned char *us1 = (const unsigned char *) s1;
const unsigned char *us2 = (const unsigned char *) s2;
while (--n >= 0 && ichars[*us1] == ichars[*us2++])
if (!*us1++)
return 0;
return n < 0 ? 0 : ichars[*us1] - ichars[*--us2];
}
#endif /* HAVE_STRCASECMP */
#ifndef HAVE_STRSTR
char *
strstr(s, p)
const char *s;
const char *p;
{
int len;
if (s && p)
for (len = strlen(p); *s; s++)
if (*s == *p && strncmp(s, p, len) == 0)
return (char *) s;
return 0;
}
#endif /* HAVE_STRSTR */
#ifndef HAVE_STRERROR
char *
strerror(err)
int err;
{
static char buf[64];
# ifdef HAVE_SYS_ERRLIST
# ifndef SYS_ERRLIST_DECLARED
extern int sys_nerr;
extern char *sys_errlist[];
# endif
char *p;
if (err < 0 || err >= sys_nerr)
shf_snprintf(p = buf, sizeof(buf), "Unknown system error %d",
err);
else
p = sys_errlist[err];
return p;
# else /* HAVE_SYS_ERRLIST */
switch (err) {
case EINVAL:
return "Invalid argument";
case EACCES:
return "Permission denied";
case ESRCH:
return "No such process";
case EPERM:
return "Not owner";
case ENOENT:
return "No such file or directory";
case ENOTDIR:
return "Not a directory";
case ENOEXEC:
return "Exec format error";
case ENOMEM:
return "Not enough memory";
case E2BIG:
return "Argument list too long";
default:
shf_snprintf(buf, sizeof(buf), "Unknown system error %d", err);
return buf;
}
# endif /* HAVE_SYS_ERRLIST */
}
#endif /* !HAVE_STRERROR */
#ifdef TIMES_BROKEN
# include "ksh_time.h"
# include "ksh_times.h"
# ifdef HAVE_GETRUSAGE
# include <sys/resource.h>
# else /* HAVE_GETRUSAGE */
# include <sys/timeb.h>
# endif /* HAVE_GETRUSAGE */
clock_t
ksh_times(tms)
struct tms *tms;
{
static clock_t base_sec;
clock_t rv;
# ifdef HAVE_GETRUSAGE
{
struct timeval tv;
struct rusage ru;
getrusage(RUSAGE_SELF, &ru);
tms->tms_utime = ru.ru_utime.tv_sec * CLK_TCK
+ ru.ru_utime.tv_usec * CLK_TCK / 1000000;
tms->tms_stime = ru.ru_stime.tv_sec * CLK_TCK
+ ru.ru_stime.tv_usec * CLK_TCK / 1000000;
getrusage(RUSAGE_CHILDREN, &ru);
tms->tms_cutime = ru.ru_utime.tv_sec * CLK_TCK
+ ru.ru_utime.tv_usec * CLK_TCK / 1000000;
tms->tms_cstime = ru.ru_stime.tv_sec * CLK_TCK
+ ru.ru_stime.tv_usec * CLK_TCK / 1000000;
gettimeofday(&tv, (struct timezone *) 0);
if (base_sec == 0)
base_sec = tv.tv_sec;
rv = (tv.tv_sec - base_sec) * CLK_TCK;
rv += tv.tv_usec * CLK_TCK / 1000000;
}
# else /* HAVE_GETRUSAGE */
/* Assume times() available, but always returns 0
* (also assumes ftime() available)
*/
{
struct timeb tb;
if (times(tms) == (clock_t) -1)
return (clock_t) -1;
ftime(&tb);
if (base_sec == 0)
base_sec = tb.time;
rv = (tb.time - base_sec) * CLK_TCK;
rv += tb.millitm * CLK_TCK / 1000;
}
# endif /* HAVE_GETRUSAGE */
return rv;
}
#endif /* TIMES_BROKEN */
#ifdef OPENDIR_DOES_NONDIR
/* Prevent opendir() from attempting to open non-directories. Such
* behavior can cause problems if it attempts to open special devices...
*/
DIR *
ksh_opendir(d)
const char *d;
{
struct stat statb;
if (stat(d, &statb) != 0)
return (DIR *) 0;
if (!S_ISDIR(statb.st_mode)) {
errno = ENOTDIR;
return (DIR *) 0;
}
return opendir(d);
}
#endif /* OPENDIR_DOES_NONDIR */
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