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strings: implement -t radix

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v2: minor code cleanup, no changes.
v1: Implement -t radix option.
    Fix help text for -o option.

Signed-off-by: Tito Ragusa <farmatito@tiscali.it>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Tito Ragusa 2016-10-24 21:52:10 +02:00 committed by Denys Vlasenko
parent db74c6caed
commit 69312e87b0
1 changed files with 23 additions and 9 deletions
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32
miscutils/strings.c
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@ -8,13 +8,16 @@
*/
//usage:#define strings_trivial_usage
//usage: "[-afo] [-n LEN] [FILE]..."
//usage: "[-fo] [-t o/d/x] [-n LEN] [FILE]..."
//usage:#define strings_full_usage "\n\n"
//usage: "Display printable strings in a binary file\n"
//usage: "\n -a Scan whole file (default)"
//usage: "\n -f Precede strings with filenames"
//usage: "\n -n LEN At least LEN characters form a string (default 4)"
//usage: "\n -o Precede strings with decimal offsets"
//We usually don't bother user with "nop" options. They work, but are not shown:
////usage: "\n -a Scan whole file (default)"
//unimplemented alternative is -d: Only strings from initialized, loaded data sections
//usage: "\n -f Precede strings with filenames"
//usage: "\n -o Precede strings with octal offsets"
//usage: "\n -t o/d/x Precede strings with offsets in base 8/10/16"
//usage: "\n -n LEN At least LEN characters form a string (default 4)"
#include "libbb.h"
@ -22,6 +25,7 @@
#define PRINT_NAME 2
#define PRINT_OFFSET 4
#define SIZE 8
#define PRINT_RADIX 16
int strings_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int strings_main(int argc UNUSED_PARAM, char **argv)
@ -33,8 +37,11 @@ int strings_main(int argc UNUSED_PARAM, char **argv)
char *string;
const char *fmt = "%s: ";
const char *n_arg = "4";
/* default for -o */
const char *radix = "o";
char *radix_fmt;
getopt32(argv, "afon:", &n_arg);
getopt32(argv, "afon:t:", &n_arg, &radix);
/* -a is our default behaviour */
/*argc -= optind;*/
argv += optind;
@ -43,6 +50,11 @@ int strings_main(int argc UNUSED_PARAM, char **argv)
string = xzalloc(n + 1);
n--;
if ((radix[0] != 'd' && radix[0] != 'o' && radix[0] != 'x') || radix[1] != 0)
bb_show_usage();
radix_fmt = xasprintf("%%7"OFF_FMT"%s ", radix);
if (!*argv) {
fmt = "{%s}: ";
*--argv = (char *)bb_msg_standard_input;
@ -67,8 +79,8 @@ int strings_main(int argc UNUSED_PARAM, char **argv)
if (option_mask32 & PRINT_NAME) {
printf(fmt, *argv);
}
if (option_mask32 & PRINT_OFFSET) {
printf("%7"OFF_FMT"o ", offset - n);
if (option_mask32 & (PRINT_OFFSET | PRINT_RADIX)) {
printf(radix_fmt, offset - n);
}
fputs(string, stdout);
}
@ -85,8 +97,10 @@ int strings_main(int argc UNUSED_PARAM, char **argv)
fclose_if_not_stdin(file);
} while (*++argv);
if (ENABLE_FEATURE_CLEAN_UP)
if (ENABLE_FEATURE_CLEAN_UP) {
free(string);
free(radix_fmt);
}
fflush_stdout_and_exit(status);
}