/* 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.
+ Copyright 1999 Dave Cinege
+ Portions copyright (C) 1990-1996 Free Software Foundation, Inc.
- 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. */
+ Licensed under GPLv2 or later, see file LICENSE in this source tree.
+*/
/* Usage: printf format [argument...]
%b = print an argument string, interpreting backslash escapes
- The `format' argument is re-used as many times as necessary
+ 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 <string.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <ctype.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;
-
-int printf_main(int argc, char **argv)
+ David MacKenzie <djm@gnu.ai.mit.edu>
+*/
+
+/* 19990508 Busy Boxed! Dave Cinege */
+
+//usage:#define printf_trivial_usage
+//usage: "FORMAT [ARG]..."
+//usage:#define printf_full_usage "\n\n"
+//usage: "Format and print ARG(s) according to FORMAT (a-la C printf)"
+//usage:
+//usage:#define printf_example_usage
+//usage: "$ printf \"Val=%d\\n\" 5\n"
+//usage: "Val=5\n"
+
+#include "libbb.h"
+
+/* A note on bad input: neither bash 3.2 nor coreutils 6.10 stop on it.
+ * They report it:
+ * bash: printf: XXX: invalid number
+ * printf: XXX: expected a numeric value
+ * bash: printf: 123XXX: invalid number
+ * printf: 123XXX: value not completely converted
+ * but then they use 0 (or partially converted numeric prefix) as a value
+ * and continue. They exit with 1 in this case.
+ * Both accept insane field width/precision (e.g. %9999999999.9999999999d).
+ * Both print error message and assume 0 if %*.*f width/precision is "bad"
+ * (but negative numbers are not "bad").
+ * Both accept negative numbers for %u specifier.
+ *
+ * We try to be compatible.
+ */
+
+typedef void FAST_FUNC (*converter)(const char *arg, void *result);
+
+static int multiconvert(const char *arg, void *result, converter convert)
{
- char *format;
- int args_used;
+ if (*arg == '"' || *arg == '\'') {
+ arg = utoa((unsigned char)arg[1]);
+ }
+ errno = 0;
+ convert(arg, result);
+ if (errno) {
+ bb_error_msg("invalid number '%s'", arg);
+ return 1;
+ }
+ return 0;
+}
- exit_status = 0;
- if (argc <= 1 || **(argv + 1) == '-') {
- usage(printf_usage);
+static void FAST_FUNC conv_strtoull(const char *arg, void *result)
+{
+ *(unsigned long long*)result = bb_strtoull(arg, NULL, 0);
+ /* both coreutils 6.10 and bash 3.2:
+ * $ printf '%x\n' -2
+ * fffffffffffffffe
+ * Mimic that:
+ */
+ if (errno) {
+ *(unsigned long long*)result = bb_strtoll(arg, NULL, 0);
}
+}
+static void FAST_FUNC conv_strtoll(const char *arg, void *result)
+{
+ *(long long*)result = bb_strtoll(arg, NULL, 0);
+}
+static void FAST_FUNC conv_strtod(const char *arg, void *result)
+{
+ char *end;
+ /* Well, this one allows leading whitespace... so what? */
+ /* What I like much less is that "-" accepted too! :( */
+ *(double*)result = strtod(arg, &end);
+ if (end[0]) {
+ errno = ERANGE;
+ *(double*)result = 0;
+ }
+}
- format = argv[1];
- argc -= 2;
- argv += 2;
+/* Callers should check errno to detect errors */
+static unsigned long long my_xstrtoull(const char *arg)
+{
+ unsigned long long result;
+ if (multiconvert(arg, &result, conv_strtoull))
+ result = 0;
+ return result;
+}
+static long long my_xstrtoll(const char *arg)
+{
+ long long result;
+ if (multiconvert(arg, &result, conv_strtoll))
+ result = 0;
+ return result;
+}
+static double my_xstrtod(const char *arg)
+{
+ double result;
+ multiconvert(arg, &result, conv_strtod);
+ return result;
+}
- do {
- args_used = print_formatted(format, argc, argv);
- argc -= args_used;
- argv += args_used;
+/* Handles %b */
+static void print_esc_string(const char *str)
+{
+ char c;
+ while ((c = *str) != '\0') {
+ str++;
+ if (c == '\\') {
+ /* %b also accepts 4-digit octals of the form \0### */
+ if (*str == '0') {
+ if ((unsigned char)(str[1] - '0') < 8) {
+ /* 2nd char is 0..7: skip leading '0' */
+ str++;
+ }
+ }
+ {
+ /* optimization: don't force arg to be on-stack,
+ * use another variable for that. */
+ const char *z = str;
+ c = bb_process_escape_sequence(&z);
+ str = z;
+ }
+ }
+ putchar(c);
}
- while (args_used > 0 && argc > 0);
+}
-/*
- if (argc > 0)
- fprintf(stderr, "excess args ignored");
-*/
+static void print_direc(char *format, unsigned fmt_length,
+ int field_width, int precision,
+ const char *argument)
+{
+ long long llv;
+ double dv;
+ char saved;
+ char *have_prec, *have_width;
- return(exit_status);
+ saved = format[fmt_length];
+ format[fmt_length] = '\0';
+
+ have_prec = strstr(format, ".*");
+ have_width = strchr(format, '*');
+ if (have_width - 1 == have_prec)
+ have_width = NULL;
+
+ errno = 0;
+
+ switch (format[fmt_length - 1]) {
+ case 'c':
+ printf(format, *argument);
+ break;
+ case 'd':
+ case 'i':
+ llv = my_xstrtoll(argument);
+ print_long:
+ if (!have_width) {
+ if (!have_prec)
+ printf(format, llv);
+ else
+ printf(format, precision, llv);
+ } else {
+ if (!have_prec)
+ printf(format, field_width, llv);
+ else
+ printf(format, field_width, precision, llv);
+ }
+ break;
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ llv = my_xstrtoull(argument);
+ /* cheat: unsigned long and long have same width, so... */
+ goto print_long;
+ case 's':
+ /* Are char* and long long the same? */
+ if (sizeof(argument) == sizeof(llv)) {
+ llv = (long long)(ptrdiff_t)argument;
+ goto print_long;
+ } else {
+ /* Hope compiler will optimize it out by moving call
+ * instruction after the ifs... */
+ if (!have_width) {
+ if (!have_prec)
+ printf(format, argument, /*unused:*/ argument, argument);
+ else
+ printf(format, precision, argument, /*unused:*/ argument);
+ } else {
+ if (!have_prec)
+ printf(format, field_width, argument, /*unused:*/ argument);
+ else
+ printf(format, field_width, precision, argument);
+ }
+ break;
+ }
+ case 'f':
+ case 'e':
+ case 'E':
+ case 'g':
+ case 'G':
+ dv = my_xstrtod(argument);
+ if (!have_width) {
+ if (!have_prec)
+ printf(format, dv);
+ else
+ printf(format, precision, dv);
+ } else {
+ if (!have_prec)
+ printf(format, field_width, dv);
+ else
+ printf(format, field_width, precision, dv);
+ }
+ break;
+ } /* switch */
+
+ format[fmt_length] = saved;
}
-/* Print the text in FORMAT, using ARGV (with ARGC elements) for
- arguments to any `%' directives.
- Return the number of elements of ARGV used. */
+/* Handle params for "%*.*f". Negative numbers are ok (compat). */
+static int get_width_prec(const char *str)
+{
+ int v = bb_strtoi(str, NULL, 10);
+ if (errno) {
+ bb_error_msg("invalid number '%s'", str);
+ v = 0;
+ }
+ return v;
+}
-static int print_formatted(char *format, int argc, char **argv)
+/* Print the text in FORMAT, using ARGV for arguments to any '%' directives.
+ Return advanced ARGV. */
+static char **print_formatted(char *f, char **argv, int *conv_err)
{
- 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) {
+ char *direc_start; /* Start of % directive. */
+ unsigned direc_length; /* Length of % directive. */
+ int field_width; /* Arg to first '*' */
+ int precision; /* Arg to second '*' */
+ char **saved_argv = argv;
+
+ for (; *f; ++f) {
switch (*f) {
case '%':
direc_start = f++;
direc_length = 1;
- field_width = precision = -1;
+ field_width = precision = 0;
if (*f == '%') {
- putchar('%');
+ bb_putchar('%');
break;
}
if (*f == 'b') {
- if (argc > 0) {
+ if (*argv) {
print_esc_string(*argv);
++argv;
- --argc;
}
break;
}
if (*f == '*') {
++f;
++direc_length;
- if (argc > 0) {
- field_width = xstrtoul(*argv);
- ++argv;
- --argc;
- } else
- field_width = 0;
- } else
- while (ISDIGIT(*f)) {
+ if (*argv)
+ field_width = get_width_prec(*argv++);
+ } 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)) {
+ if (*argv)
+ precision = get_width_prec(*argv++);
+ } else {
+ while (isdigit(*f)) {
++f;
++direc_length;
}
+ }
}
- if (*f == 'l' || *f == 'L' || *f == 'h') {
- ++f;
+
+ /* Remove "lLhz" size modifiers, repeatedly.
+ * bash does not like "%lld", but coreutils
+ * happily takes even "%Llllhhzhhzd"!
+ * We are permissive like coreutils */
+ while ((*f | 0x20) == 'l' || *f == 'h' || *f == 'z') {
+ overlapping_strcpy(f, f + 1);
+ }
+ /* Add "ll" if integer modifier, then print */
+ {
+ static const char format_chars[] ALIGN1 = "diouxXfeEgGcs";
+ char *p = strchr(format_chars, *f);
+ /* needed - try "printf %" without it */
+ if (p == NULL) {
+ bb_error_msg("%s: invalid format", direc_start);
+ /* causes main() to exit with error */
+ return saved_argv - 1;
+ }
++direc_length;
+ if (p - format_chars <= 5) {
+ /* it is one of "diouxX" */
+ p = xmalloc(direc_length + 3);
+ memcpy(p, direc_start, direc_length);
+ p[direc_length + 1] = p[direc_length - 1];
+ p[direc_length - 1] = 'l';
+ p[direc_length] = 'l';
+ //bb_error_msg("<%s>", p);
+ direc_length += 2;
+ direc_start = p;
+ } else {
+ p = NULL;
+ }
+ if (*argv) {
+ print_direc(direc_start, direc_length, field_width,
+ precision, *argv++);
+ } else {
+ print_direc(direc_start, direc_length, field_width,
+ precision, "");
+ }
+ *conv_err |= errno;
+ free(p);
}
- /*
- 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);
+ if (*++f == 'c') {
+ return saved_argv; /* causes main() to exit */
+ }
+ bb_putchar(bb_process_escape_sequence((const char **)&f));
+ f--;
break;
-
default:
putchar(*f);
}
}
- return save_argc - argc;
+ return argv;
}
-/* 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)
+int printf_main(int argc UNUSED_PARAM, char **argv)
{
- 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);
+ int conv_err;
+ char *format;
+ char **argv2;
+
+ /* We must check that stdout is not closed.
+ * The reason for this is highly non-obvious.
+ * printf_main is used from shell.
+ * Shell must correctly handle 'printf "%s" foo'
+ * if stdout is closed. With stdio, output gets shoveled into
+ * stdout buffer, and even fflush cannot clear it out. It seems that
+ * even if libc receives EBADF on write attempts, it feels determined
+ * to output data no matter what. So it will try later,
+ * and possibly will clobber future output. Not good. */
+// TODO: check fcntl() & O_ACCMODE == O_WRONLY or O_RDWR?
+ if (fcntl(1, F_GETFL) == -1)
+ return 1; /* match coreutils 6.10 (sans error msg to stderr) */
+ //if (dup2(1, 1) != 1) - old way
+ // return 1;
+
+ /* bash builtin errors out on "printf '-%s-\n' foo",
+ * coreutils-6.9 works. Both work with "printf -- '-%s-\n' foo".
+ * We will mimic coreutils. */
+ if (argv[1] && argv[1][0] == '-' && argv[1][1] == '-' && !argv[1][2])
+ argv++;
+ if (!argv[1]) {
+ if (ENABLE_ASH_BUILTIN_PRINTF
+ && applet_name[0] != 'p'
+ ) {
+ bb_error_msg("usage: printf FORMAT [ARGUMENT...]");
+ return 2; /* bash compat */
}
- break;
+ bb_show_usage();
}
- 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;
-}
+ format = argv[1];
+ argv2 = argv + 2;
-static double xstrtod(char *s)
-{
- char *end;
- double val;
+ conv_err = 0;
+ do {
+ argv = argv2;
+ argv2 = print_formatted(format, argv, &conv_err);
+ } while (argv2 > argv && *argv2);
- errno = 0;
- val = strtod(s, &end);
- verify(s, end);
- return val;
-}
+ /* coreutils compat (bash doesn't do this):
+ if (*argv)
+ fprintf(stderr, "excess args ignored");
+ */
-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;
- }
+ return (argv2 < argv) /* if true, print_formatted errored out */
+ || conv_err; /* print_formatted saw invalid number */
}
projects / platform / upstream / busybox.git / blobdiff