460 lines
9.5 KiB
C
460 lines
9.5 KiB
C
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#if !defined(BUILTIN) && !defined(SHELL)
|
|
#ifndef lint
|
|
static char copyright[] =
|
|
"@(#) Copyright (c) 1989, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
#endif
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)printf.c 8.1 (Berkeley) 7/20/93";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
|
|
#include "bashansi.h"
|
|
#include "shell.h"
|
|
#include "builtins.h"
|
|
#include "stdc.h"
|
|
|
|
#if !defined (errno)
|
|
extern int errno;
|
|
#endif
|
|
|
|
#define PF(f, func) { \
|
|
if (fieldwidth) \
|
|
if (precision) \
|
|
(void)printf(f, fieldwidth, precision, func); \
|
|
else \
|
|
(void)printf(f, fieldwidth, func); \
|
|
else if (precision) \
|
|
(void)printf(f, precision, func); \
|
|
else \
|
|
(void)printf(f, func); \
|
|
}
|
|
|
|
static int asciicode __P((void));
|
|
static void escape __P((char *));
|
|
static int getchr __P((void));
|
|
static double getdouble __P((void));
|
|
static int getint __P((int *));
|
|
static int getlong __P((long *));
|
|
static char *getstr __P((void));
|
|
static char *mklong __P((char *, int));
|
|
static void usage __P((void));
|
|
|
|
static char **gargv;
|
|
|
|
int printf_builtin ();
|
|
static int printf_main ();
|
|
extern char *this_command_name;
|
|
extern char *single_quote ();
|
|
extern char **make_builtin_argv ();
|
|
|
|
static char *printf_doc[] = {
|
|
"printf formats and prints its arguments, after the first, under control",
|
|
"of the format. The format is a character string which contains three",
|
|
"types of objects: plain characters, which are simply copied to standard",
|
|
"output, character escape sequences which are converted and copied to the",
|
|
"standard output, and format specifications, each of which causes printing",
|
|
"of the next successive argument. In addition to the standard printf(1)",
|
|
"formats, %%b means to expand escapes in the corresponding argument, and",
|
|
"%%q means to quote the argument in a way that can be reused as shell input.",
|
|
(char *)NULL
|
|
};
|
|
|
|
struct builtin printf_struct = {
|
|
"printf",
|
|
printf_builtin,
|
|
BUILTIN_ENABLED,
|
|
printf_doc,
|
|
"printf format [arguments]",
|
|
(char *)0
|
|
};
|
|
|
|
int
|
|
printf_builtin (list)
|
|
WORD_LIST *list;
|
|
{
|
|
int c, r;
|
|
char **v;
|
|
WORD_LIST *l;
|
|
|
|
v = make_builtin_argv (list, &c);
|
|
r = printf_main (c, v);
|
|
free (v);
|
|
fflush(stdout);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int
|
|
printf_main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
extern int optind;
|
|
static char *skip1, *skip2;
|
|
int ch, end, fieldwidth, precision;
|
|
char convch, nextch, *format, *fmt, *start;
|
|
|
|
while ((ch = getopt(argc, argv, "")) != EOF)
|
|
switch (ch) {
|
|
case '?':
|
|
default:
|
|
usage();
|
|
return (1);
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc < 1) {
|
|
usage();
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Basic algorithm is to scan the format string for conversion
|
|
* specifications -- once one is found, find out if the field
|
|
* width or precision is a '*'; if it is, gather up value. Note,
|
|
* format strings are reused as necessary to use up the provided
|
|
* arguments, arguments of zero/null string are provided to use
|
|
* up the format string.
|
|
*/
|
|
skip1 = "#-+ 0";
|
|
skip2 = "*0123456789";
|
|
|
|
escape(fmt = format = *argv); /* backslash interpretation */
|
|
gargv = ++argv;
|
|
for (;;) {
|
|
end = 0;
|
|
/* find next format specification */
|
|
next: for (start = fmt;; ++fmt) {
|
|
if (!*fmt) {
|
|
/* avoid infinite loop */
|
|
if (end == 1) {
|
|
warnx("missing format character",
|
|
NULL, NULL);
|
|
return (1);
|
|
}
|
|
end = 1;
|
|
if (fmt > start)
|
|
(void)printf("%s", start);
|
|
if (!*gargv)
|
|
return (0);
|
|
fmt = format;
|
|
goto next;
|
|
}
|
|
/* %% prints a % */
|
|
if (*fmt == '%') {
|
|
if (*++fmt != '%')
|
|
break;
|
|
*fmt++ = '\0';
|
|
(void)printf("%s", start);
|
|
goto next;
|
|
}
|
|
}
|
|
|
|
/* skip to field width */
|
|
for (; strchr(skip1, *fmt); ++fmt);
|
|
if (*fmt == '*') {
|
|
if (getint(&fieldwidth))
|
|
return (1);
|
|
} else
|
|
fieldwidth = 0;
|
|
|
|
/* skip to possible '.', get following precision */
|
|
for (; strchr(skip2, *fmt); ++fmt);
|
|
if (*fmt == '.')
|
|
++fmt;
|
|
if (*fmt == '*') {
|
|
if (getint(&precision))
|
|
return (1);
|
|
} else
|
|
precision = 0;
|
|
|
|
/* skip to conversion char */
|
|
for (; strchr(skip2, *fmt); ++fmt);
|
|
if (!*fmt) {
|
|
warnx("missing format character", NULL, NULL);
|
|
return (1);
|
|
}
|
|
|
|
convch = *fmt;
|
|
nextch = *++fmt;
|
|
*fmt = '\0';
|
|
switch(convch) {
|
|
case 'c': {
|
|
char p;
|
|
|
|
p = getchr();
|
|
PF(start, p);
|
|
break;
|
|
}
|
|
case 's': {
|
|
char *p;
|
|
|
|
p = getstr();
|
|
PF(start, p);
|
|
break;
|
|
}
|
|
case 'b': { /* expand escapes in argument */
|
|
char *p;
|
|
|
|
p = getstr();
|
|
escape(p);
|
|
PF("%s", p);
|
|
break;
|
|
}
|
|
case 'q': { /* print with shell single quoting */
|
|
char *p, *p2;
|
|
|
|
p = getstr();
|
|
p2 = single_quote(p);
|
|
PF("%s", p2);
|
|
free(p2);
|
|
break;
|
|
}
|
|
case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': {
|
|
long p;
|
|
char *f;
|
|
|
|
if ((f = mklong(start, convch)) == NULL)
|
|
return (1);
|
|
if (getlong(&p))
|
|
return (1);
|
|
PF(f, p);
|
|
break;
|
|
}
|
|
case 'e': case 'E': case 'f': case 'g': case 'G': {
|
|
double p;
|
|
|
|
p = getdouble();
|
|
PF(start, p);
|
|
break;
|
|
}
|
|
default:
|
|
warnx("illegal format character", NULL, NULL);
|
|
return (1);
|
|
}
|
|
*fmt = nextch;
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static char *
|
|
mklong(str, ch)
|
|
char *str;
|
|
int ch;
|
|
{
|
|
static char copy[64];
|
|
int len;
|
|
|
|
len = strlen(str) + 2;
|
|
memmove(copy, str, len - 3);
|
|
copy[len - 3] = 'l';
|
|
copy[len - 2] = ch;
|
|
copy[len - 1] = '\0';
|
|
return (copy);
|
|
}
|
|
|
|
static void
|
|
escape(fmt)
|
|
register char *fmt;
|
|
{
|
|
register char *store;
|
|
register int value, c;
|
|
|
|
for (store = fmt; c = *fmt; ++fmt, ++store) {
|
|
if (c != '\\') {
|
|
*store = c;
|
|
continue;
|
|
}
|
|
switch (*++fmt) {
|
|
case '\0': /* EOS, user error */
|
|
*store = '\\';
|
|
*++store = '\0';
|
|
return;
|
|
case '\\': /* backslash */
|
|
case '\'': /* single quote */
|
|
*store = *fmt;
|
|
break;
|
|
case 'a': /* bell/alert */
|
|
*store = '\7';
|
|
break;
|
|
case 'b': /* backspace */
|
|
*store = '\b';
|
|
break;
|
|
case 'c':
|
|
return;
|
|
case 'e':
|
|
case 'E':
|
|
*store = '\033';
|
|
break;
|
|
case 'f': /* form-feed */
|
|
*store = '\f';
|
|
break;
|
|
case 'n': /* newline */
|
|
*store = '\n';
|
|
break;
|
|
case 'r': /* carriage-return */
|
|
*store = '\r';
|
|
break;
|
|
case 't': /* horizontal tab */
|
|
*store = '\t';
|
|
break;
|
|
case 'v': /* vertical tab */
|
|
*store = '\13';
|
|
break;
|
|
/* octal constant */
|
|
case '0': case '1': case '2': case '3':
|
|
case '4': case '5': case '6': case '7':
|
|
for (c = 3, value = 0;
|
|
c-- && *fmt >= '0' && *fmt <= '7'; ++fmt) {
|
|
value <<= 3;
|
|
value += *fmt - '0';
|
|
}
|
|
--fmt;
|
|
*store = value;
|
|
break;
|
|
default:
|
|
*store = *fmt;
|
|
break;
|
|
}
|
|
}
|
|
*store = '\0';
|
|
}
|
|
|
|
static int
|
|
getchr()
|
|
{
|
|
if (!*gargv)
|
|
return ('\0');
|
|
return ((int)**gargv++);
|
|
}
|
|
|
|
static char *
|
|
getstr()
|
|
{
|
|
if (!*gargv)
|
|
return ("");
|
|
return (*gargv++);
|
|
}
|
|
|
|
static char *Number = "+-.0123456789";
|
|
static int
|
|
getint(ip)
|
|
int *ip;
|
|
{
|
|
long val;
|
|
|
|
if (getlong(&val))
|
|
return (1);
|
|
if (val > INT_MAX) {
|
|
warnx("%s: %s", *gargv, strerror(ERANGE));
|
|
return (1);
|
|
}
|
|
*ip = val;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
getlong(lp)
|
|
long *lp;
|
|
{
|
|
long val;
|
|
char *ep;
|
|
|
|
if (!*gargv) {
|
|
*lp = 0;
|
|
return (0);
|
|
}
|
|
if (strchr(Number, **gargv)) {
|
|
errno = 0;
|
|
val = strtol(*gargv, &ep, 0);
|
|
if (*ep != '\0') {
|
|
warnx("%s: illegal number", *gargv, NULL);
|
|
return (1);
|
|
}
|
|
if (errno == ERANGE)
|
|
if (val == LONG_MAX) {
|
|
warnx("%s: %s", *gargv, strerror(ERANGE));
|
|
return (1);
|
|
}
|
|
if (val == LONG_MIN) {
|
|
warnx("%s: %s", *gargv, strerror(ERANGE));
|
|
return (1);
|
|
}
|
|
|
|
*lp = val;
|
|
++gargv;
|
|
return (0);
|
|
}
|
|
*lp = (long)asciicode();
|
|
return (0);
|
|
}
|
|
|
|
static double
|
|
getdouble()
|
|
{
|
|
if (!*gargv)
|
|
return ((double)0);
|
|
if (strchr(Number, **gargv))
|
|
return (atof(*gargv++));
|
|
return ((double)asciicode());
|
|
}
|
|
|
|
static int
|
|
asciicode()
|
|
{
|
|
register int ch;
|
|
|
|
ch = **gargv;
|
|
if (ch == '\'' || ch == '"')
|
|
ch = (*gargv)[1];
|
|
++gargv;
|
|
return (ch);
|
|
}
|
|
|
|
static void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "usage: printf format [arg ...]\n");
|
|
}
|