mirror of
https://github.com/sheumann/hush.git
synced 2024-08-20 04:28:57 +00:00
480 lines
11 KiB
C
480 lines
11 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/* printf - format and print data
|
|
Copyright (C) 90, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software Foundation,
|
|
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
/* Usage: printf format [argument...]
|
|
|
|
A front end to the printf function that lets it be used from the shell.
|
|
|
|
Backslash escapes:
|
|
|
|
\" = double quote
|
|
\\ = backslash
|
|
\a = alert (bell)
|
|
\b = backspace
|
|
\c = produce no further output
|
|
\f = form feed
|
|
\n = new line
|
|
\r = carriage return
|
|
\t = horizontal tab
|
|
\v = vertical tab
|
|
\0ooo = octal number (ooo is 0 to 3 digits)
|
|
\xhhh = hexadecimal number (hhh is 1 to 3 digits)
|
|
|
|
Additional directive:
|
|
|
|
%b = print an argument string, interpreting backslash escapes
|
|
|
|
The `format' argument is re-used as many times as necessary
|
|
to convert all of the given arguments.
|
|
|
|
David MacKenzie <djm@gnu.ai.mit.edu> */
|
|
|
|
|
|
// 19990508 Busy Boxed! Dave Cinege
|
|
|
|
#include "internal.h"
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <getopt.h>
|
|
#include <sys/stat.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <ctype.h>
|
|
#include <libintl.h>
|
|
|
|
|
|
#ifndef S_IFMT
|
|
# define S_IFMT 0170000
|
|
#endif
|
|
#if !defined(S_ISBLK) && defined(S_IFBLK)
|
|
# define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
|
|
#endif
|
|
#if !defined(S_ISCHR) && defined(S_IFCHR)
|
|
# define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
|
|
#endif
|
|
#if !defined(S_ISDIR) && defined(S_IFDIR)
|
|
# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
|
|
#endif
|
|
#if !defined(S_ISREG) && defined(S_IFREG)
|
|
# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
|
|
#endif
|
|
#if !defined(S_ISFIFO) && defined(S_IFIFO)
|
|
# define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
|
|
#endif
|
|
#if !defined(S_ISLNK) && defined(S_IFLNK)
|
|
# define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
|
|
#endif
|
|
#if !defined(S_ISSOCK) && defined(S_IFSOCK)
|
|
# define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
|
|
#endif
|
|
#if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */
|
|
# define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB)
|
|
# define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC)
|
|
#endif
|
|
#if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */
|
|
# define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK)
|
|
#endif
|
|
|
|
#define IN_CTYPE_DOMAIN(c) 1
|
|
|
|
#ifdef isblank
|
|
# define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (c))
|
|
#else
|
|
# define ISBLANK(c) ((c) == ' ' || (c) == '\t')
|
|
#endif
|
|
#ifdef isgraph
|
|
# define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isgraph (c))
|
|
#else
|
|
# define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isprint (c) && !isspace (c))
|
|
#endif
|
|
|
|
#define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
|
|
#define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (c))
|
|
#define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
|
|
#define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (c))
|
|
#define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c))
|
|
#define ISPUNCT(c) (IN_CTYPE_DOMAIN (c) && ispunct (c))
|
|
#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
|
|
#define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c))
|
|
#define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (c))
|
|
#define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
|
|
#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
|
|
|
|
#define isodigit(c) ((c) >= '0' && (c) <= '7')
|
|
#define hextobin(c) ((c)>='a'&&(c)<='f' ? (c)-'a'+10 : (c)>='A'&&(c)<='F' ? (c)-'A'+10 : (c)-'0')
|
|
#define octtobin(c) ((c) - '0')
|
|
|
|
static double xstrtod __P((char *s));
|
|
static int print_esc __P((char *escstart));
|
|
static int print_formatted __P((char *format, int argc, char **argv));
|
|
static long xstrtol __P((char *s));
|
|
static unsigned long xstrtoul __P((char *s));
|
|
static void print_direc
|
|
__P(
|
|
|
|
(char *start, size_t length, int field_width, int precision,
|
|
char *argument));
|
|
static void print_esc_char __P((int c));
|
|
static void print_esc_string __P((char *str));
|
|
static void verify __P((char *s, char *end));
|
|
|
|
/* The value to return to the calling program. */
|
|
static int exit_status;
|
|
|
|
static const char printf_usage[] = "printf format [argument...]\n";
|
|
|
|
int printf_main(int argc, char **argv)
|
|
{
|
|
char *format;
|
|
int args_used;
|
|
|
|
exit_status = 0;
|
|
if (argc <= 1 || **(argv + 1) == '-') {
|
|
usage(printf_usage);
|
|
}
|
|
|
|
format = argv[1];
|
|
argc -= 2;
|
|
argv += 2;
|
|
|
|
do {
|
|
args_used = print_formatted(format, argc, argv);
|
|
argc -= args_used;
|
|
argv += args_used;
|
|
}
|
|
while (args_used > 0 && argc > 0);
|
|
|
|
/*
|
|
if (argc > 0)
|
|
fprintf(stderr, "excess args ignored");
|
|
*/
|
|
|
|
exit(exit_status);
|
|
}
|
|
|
|
/* Print the text in FORMAT, using ARGV (with ARGC elements) for
|
|
arguments to any `%' directives.
|
|
Return the number of elements of ARGV used. */
|
|
|
|
static int print_formatted(char *format, int argc, char **argv)
|
|
{
|
|
int save_argc = argc; /* Preserve original value. */
|
|
char *f; /* Pointer into `format'. */
|
|
char *direc_start; /* Start of % directive. */
|
|
size_t direc_length; /* Length of % directive. */
|
|
int field_width; /* Arg to first '*', or -1 if none. */
|
|
int precision; /* Arg to second '*', or -1 if none. */
|
|
|
|
for (f = format; *f; ++f) {
|
|
switch (*f) {
|
|
case '%':
|
|
direc_start = f++;
|
|
direc_length = 1;
|
|
field_width = precision = -1;
|
|
if (*f == '%') {
|
|
putchar('%');
|
|
break;
|
|
}
|
|
if (*f == 'b') {
|
|
if (argc > 0) {
|
|
print_esc_string(*argv);
|
|
++argv;
|
|
--argc;
|
|
}
|
|
break;
|
|
}
|
|
if (strchr("-+ #", *f)) {
|
|
++f;
|
|
++direc_length;
|
|
}
|
|
if (*f == '*') {
|
|
++f;
|
|
++direc_length;
|
|
if (argc > 0) {
|
|
field_width = xstrtoul(*argv);
|
|
++argv;
|
|
--argc;
|
|
} else
|
|
field_width = 0;
|
|
} else
|
|
while (ISDIGIT(*f)) {
|
|
++f;
|
|
++direc_length;
|
|
}
|
|
if (*f == '.') {
|
|
++f;
|
|
++direc_length;
|
|
if (*f == '*') {
|
|
++f;
|
|
++direc_length;
|
|
if (argc > 0) {
|
|
precision = xstrtoul(*argv);
|
|
++argv;
|
|
--argc;
|
|
} else
|
|
precision = 0;
|
|
} else
|
|
while (ISDIGIT(*f)) {
|
|
++f;
|
|
++direc_length;
|
|
}
|
|
}
|
|
if (*f == 'l' || *f == 'L' || *f == 'h') {
|
|
++f;
|
|
++direc_length;
|
|
}
|
|
/*
|
|
if (!strchr ("diouxXfeEgGcs", *f))
|
|
fprintf(stderr, "%%%c: invalid directive", *f);
|
|
*/
|
|
++direc_length;
|
|
if (argc > 0) {
|
|
print_direc(direc_start, direc_length, field_width,
|
|
precision, *argv);
|
|
++argv;
|
|
--argc;
|
|
} else
|
|
print_direc(direc_start, direc_length, field_width,
|
|
precision, "");
|
|
break;
|
|
|
|
case '\\':
|
|
f += print_esc(f);
|
|
break;
|
|
|
|
default:
|
|
putchar(*f);
|
|
}
|
|
}
|
|
|
|
return save_argc - argc;
|
|
}
|
|
|
|
/* Print a \ escape sequence starting at ESCSTART.
|
|
Return the number of characters in the escape sequence
|
|
besides the backslash. */
|
|
|
|
static int print_esc(char *escstart)
|
|
{
|
|
register char *p = escstart + 1;
|
|
int esc_value = 0; /* Value of \nnn escape. */
|
|
int esc_length; /* Length of \nnn escape. */
|
|
|
|
/* \0ooo and \xhhh escapes have maximum length of 3 chars. */
|
|
if (*p == 'x') {
|
|
for (esc_length = 0, ++p;
|
|
esc_length < 3 && ISXDIGIT(*p); ++esc_length, ++p)
|
|
esc_value = esc_value * 16 + hextobin(*p);
|
|
/* if (esc_length == 0)
|
|
fprintf(stderr, "missing hex in esc");
|
|
*/
|
|
putchar(esc_value);
|
|
} else if (*p == '0') {
|
|
for (esc_length = 0, ++p;
|
|
esc_length < 3 && isodigit(*p); ++esc_length, ++p)
|
|
esc_value = esc_value * 8 + octtobin(*p);
|
|
putchar(esc_value);
|
|
} else if (strchr("\"\\abcfnrtv", *p))
|
|
print_esc_char(*p++);
|
|
/* else
|
|
fprintf(stderr, "\\%c: invalid esc", *p);
|
|
*/
|
|
return p - escstart - 1;
|
|
}
|
|
|
|
/* Output a single-character \ escape. */
|
|
|
|
static void print_esc_char(int c)
|
|
{
|
|
switch (c) {
|
|
case 'a': /* Alert. */
|
|
putchar(7);
|
|
break;
|
|
case 'b': /* Backspace. */
|
|
putchar(8);
|
|
break;
|
|
case 'c': /* Cancel the rest of the output. */
|
|
exit(0);
|
|
break;
|
|
case 'f': /* Form feed. */
|
|
putchar(12);
|
|
break;
|
|
case 'n': /* New line. */
|
|
putchar(10);
|
|
break;
|
|
case 'r': /* Carriage return. */
|
|
putchar(13);
|
|
break;
|
|
case 't': /* Horizontal tab. */
|
|
putchar(9);
|
|
break;
|
|
case 'v': /* Vertical tab. */
|
|
putchar(11);
|
|
break;
|
|
default:
|
|
putchar(c);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Print string STR, evaluating \ escapes. */
|
|
|
|
static void print_esc_string(char *str)
|
|
{
|
|
for (; *str; str++)
|
|
if (*str == '\\')
|
|
str += print_esc(str);
|
|
else
|
|
putchar(*str);
|
|
}
|
|
|
|
static void
|
|
print_direc(char *start, size_t length, int field_width, int precision,
|
|
char *argument)
|
|
{
|
|
char *p; /* Null-terminated copy of % directive. */
|
|
|
|
p = xmalloc((unsigned) (length + 1));
|
|
strncpy(p, start, length);
|
|
p[length] = 0;
|
|
|
|
switch (p[length - 1]) {
|
|
case 'd':
|
|
case 'i':
|
|
if (field_width < 0) {
|
|
if (precision < 0)
|
|
printf(p, xstrtol(argument));
|
|
else
|
|
printf(p, precision, xstrtol(argument));
|
|
} else {
|
|
if (precision < 0)
|
|
printf(p, field_width, xstrtol(argument));
|
|
else
|
|
printf(p, field_width, precision, xstrtol(argument));
|
|
}
|
|
break;
|
|
|
|
case 'o':
|
|
case 'u':
|
|
case 'x':
|
|
case 'X':
|
|
if (field_width < 0) {
|
|
if (precision < 0)
|
|
printf(p, xstrtoul(argument));
|
|
else
|
|
printf(p, precision, xstrtoul(argument));
|
|
} else {
|
|
if (precision < 0)
|
|
printf(p, field_width, xstrtoul(argument));
|
|
else
|
|
printf(p, field_width, precision, xstrtoul(argument));
|
|
}
|
|
break;
|
|
|
|
case 'f':
|
|
case 'e':
|
|
case 'E':
|
|
case 'g':
|
|
case 'G':
|
|
if (field_width < 0) {
|
|
if (precision < 0)
|
|
printf(p, xstrtod(argument));
|
|
else
|
|
printf(p, precision, xstrtod(argument));
|
|
} else {
|
|
if (precision < 0)
|
|
printf(p, field_width, xstrtod(argument));
|
|
else
|
|
printf(p, field_width, precision, xstrtod(argument));
|
|
}
|
|
break;
|
|
|
|
case 'c':
|
|
printf(p, *argument);
|
|
break;
|
|
|
|
case 's':
|
|
if (field_width < 0) {
|
|
if (precision < 0)
|
|
printf(p, argument);
|
|
else
|
|
printf(p, precision, argument);
|
|
} else {
|
|
if (precision < 0)
|
|
printf(p, field_width, argument);
|
|
else
|
|
printf(p, field_width, precision, argument);
|
|
}
|
|
break;
|
|
}
|
|
|
|
free(p);
|
|
}
|
|
|
|
static unsigned long xstrtoul(char *s)
|
|
{
|
|
char *end;
|
|
unsigned long val;
|
|
|
|
errno = 0;
|
|
val = strtoul(s, &end, 0);
|
|
verify(s, end);
|
|
return val;
|
|
}
|
|
|
|
static long xstrtol(char *s)
|
|
{
|
|
char *end;
|
|
long val;
|
|
|
|
errno = 0;
|
|
val = strtol(s, &end, 0);
|
|
verify(s, end);
|
|
return val;
|
|
}
|
|
|
|
static double xstrtod(char *s)
|
|
{
|
|
char *end;
|
|
double val;
|
|
|
|
errno = 0;
|
|
val = strtod(s, &end);
|
|
verify(s, end);
|
|
return val;
|
|
}
|
|
|
|
static void verify(char *s, char *end)
|
|
{
|
|
if (errno) {
|
|
fprintf(stderr, "%s", s);
|
|
exit_status = 1;
|
|
} else if (*end) {
|
|
/*
|
|
if (s == end)
|
|
fprintf(stderr, "%s: expected numeric", s);
|
|
else
|
|
fprintf(stderr, "%s: not completely converted", s);
|
|
*/
|
|
exit_status = 1;
|
|
}
|
|
}
|