busybox/coreutils/sort.c

/* vi: set sw=4 ts=4: */
/*
 * SuS3 compliant sort implementation for busybox
 *
 * Copyright (C) 2004 by Rob Landley <rob@landley.net>
 *
 * MAINTAINER: Rob Landley <rob@landley.net>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 *
 * See SuS3 sort standard at:
 * http://www.opengroup.org/onlinepubs/007904975/utilities/sort.html
 */

#include "libbb.h"

/* This is a NOEXEC applet. Be very careful! */


/*
	sort [-m][-o output][-bdfinru][-t char][-k keydef]... [file...]
	sort -c [-bdfinru][-t char][-k keydef][file]
*/

/* These are sort types */
static const char OPT_STR[] ALIGN1 = "ngMucszbrdfimS:T:o:k:t:";
enum {
	FLAG_n  = 1,            /* Numeric sort */
	FLAG_g  = 2,            /* Sort using strtod() */
	FLAG_M  = 4,            /* Sort date */
/* ucsz apply to root level only, not keys.  b at root level implies bb */
	FLAG_u  = 8,            /* Unique */
	FLAG_c  = 0x10,         /* Check: no output, exit(!ordered) */
	FLAG_s  = 0x20,         /* Stable sort, no ascii fallback at end */
	FLAG_z  = 0x40,         /* Input and output is NUL terminated, not \n */
/* These can be applied to search keys, the previous four can't */
	FLAG_b  = 0x80,         /* Ignore leading blanks */
	FLAG_r  = 0x100,        /* Reverse */
	FLAG_d  = 0x200,        /* Ignore !(isalnum()|isspace()) */
	FLAG_f  = 0x400,        /* Force uppercase */
	FLAG_i  = 0x800,        /* Ignore !isprint() */
	FLAG_m  = 0x1000,       /* ignored: merge already sorted files; do not sort */
	FLAG_S  = 0x2000,       /* ignored: -S, --buffer-size=SIZE */
	FLAG_T  = 0x4000,       /* ignored: -T, --temporary-directory=DIR */
	FLAG_o  = 0x8000,
	FLAG_k  = 0x10000,
	FLAG_t  = 0x20000,
	FLAG_bb = 0x80000000,   /* Ignore trailing blanks  */
};

#if ENABLE_FEATURE_SORT_BIG
static char key_separator;

static struct sort_key {
	struct sort_key *next_key;	/* linked list */
	unsigned range[4];	/* start word, start char, end word, end char */
	unsigned flags;
} *key_list;

static char *get_key(char *str, struct sort_key *key, int flags)
{
	int start = 0, end = 0, len, j;
	unsigned i;

	/* Special case whole string, so we don't have to make a copy */
	if (key->range[0] == 1 && !key->range[1] && !key->range[2] && !key->range[3]
	 && !(flags & (FLAG_b | FLAG_d | FLAG_f | FLAG_i | FLAG_bb))
	) {
		return str;
	}

	/* Find start of key on first pass, end on second pass */
	len = strlen(str);
	for (j = 0; j < 2; j++) {
		if (!key->range[2*j])
			end = len;
		/* Loop through fields */
		else {
			end = 0;
			for (i = 1; i < key->range[2*j] + j; i++) {
				if (key_separator) {
					/* Skip body of key and separator */
					while (str[end]) {
						if (str[end++] == key_separator)
							break;
					}
				} else {
					/* Skip leading blanks */
					while (isspace(str[end]))
						end++;
					/* Skip body of key */
					while (str[end]) {
						if (isspace(str[end]))
							break;
						end++;
					}
				}
			}
		}
		if (!j) start = end;
	}
	/* Strip leading whitespace if necessary */
//XXX: skip_whitespace()
	if (flags & FLAG_b)
		while (isspace(str[start])) start++;
	/* Strip trailing whitespace if necessary */
	if (flags & FLAG_bb)
		while (end > start && isspace(str[end-1])) end--;
	/* Handle offsets on start and end */
	if (key->range[3]) {
		end += key->range[3] - 1;
		if (end > len) end = len;
	}
	if (key->range[1]) {
		start += key->range[1] - 1;
		if (start > len) start = len;
	}
	/* Make the copy */
	if (end < start) end = start;
	str = xstrndup(str+start, end-start);
	/* Handle -d */
	if (flags & FLAG_d) {
		for (start = end = 0; str[end]; end++)
			if (isspace(str[end]) || isalnum(str[end]))
				str[start++] = str[end];
		str[start] = '\0';
	}
	/* Handle -i */
	if (flags & FLAG_i) {
		for (start = end = 0; str[end]; end++)
			if (isprint(str[end]))
				str[start++] = str[end];
		str[start] = '\0';
	}
	/* Handle -f */
	if (flags & FLAG_f)
		for (i = 0; str[i]; i++)
			str[i] = toupper(str[i]);

	return str;
}

static struct sort_key *add_key(void)
{
	struct sort_key **pkey = &key_list;
	while (*pkey)
		pkey = &((*pkey)->next_key);
	return *pkey = xzalloc(sizeof(struct sort_key));
}

#define GET_LINE(fp) \
	((option_mask32 & FLAG_z) \
	? bb_get_chunk_from_file(fp, NULL) \
	: xmalloc_fgetline(fp))
#else
#define GET_LINE(fp) xmalloc_fgetline(fp)
#endif

/* Iterate through keys list and perform comparisons */
static int compare_keys(const void *xarg, const void *yarg)
{
	int flags = option_mask32, retval = 0;
	char *x, *y;

#if ENABLE_FEATURE_SORT_BIG
	struct sort_key *key;

	for (key = key_list; !retval && key; key = key->next_key) {
		flags = key->flags ? key->flags : option_mask32;
		/* Chop out and modify key chunks, handling -dfib */
		x = get_key(*(char **)xarg, key, flags);
		y = get_key(*(char **)yarg, key, flags);
#else
	/* This curly bracket serves no purpose but to match the nesting
	   level of the for () loop we're not using */
	{
		x = *(char **)xarg;
		y = *(char **)yarg;
#endif
		/* Perform actual comparison */
		switch (flags & 7) {
		default:
			bb_error_msg_and_die("unknown sort type");
			break;
		/* Ascii sort */
		case 0:
#if ENABLE_LOCALE_SUPPORT
			retval = strcoll(x, y);
#else
			retval = strcmp(x, y);
#endif
			break;
#if ENABLE_FEATURE_SORT_BIG
		case FLAG_g: {
			char *xx, *yy;
			double dx = strtod(x, &xx);
			double dy = strtod(y, &yy);
			/* not numbers < NaN < -infinity < numbers < +infinity) */
			if (x == xx)
				retval = (y == yy ? 0 : -1);
			else if (y == yy)
				retval = 1;
			/* Check for isnan */
			else if (dx != dx)
				retval = (dy != dy) ? 0 : -1;
			else if (dy != dy)
				retval = 1;
			/* Check for infinity.  Could underflow, but it avoids libm. */
			else if (1.0 / dx == 0.0) {
				if (dx < 0)
					retval = (1.0 / dy == 0.0 && dy < 0) ? 0 : -1;
				else
					retval = (1.0 / dy == 0.0 && dy > 0) ? 0 : 1;
			} else if (1.0 / dy == 0.0)
				retval = (dy < 0) ? 1 : -1;
			else
				retval = (dx > dy) ? 1 : ((dx < dy) ? -1 : 0);
			break;
		}
		case FLAG_M: {
			struct tm thyme;
			int dx;
			char *xx, *yy;

			xx = strptime(x, "%b", &thyme);
			dx = thyme.tm_mon;
			yy = strptime(y, "%b", &thyme);
			if (!xx)
				retval = (!yy) ? 0 : -1;
			else if (!yy)
				retval = 1;
			else
				retval = (dx == thyme.tm_mon) ? 0 : dx - thyme.tm_mon;
			break;
		}
		/* Full floating point version of -n */
		case FLAG_n: {
			double dx = atof(x);
			double dy = atof(y);
			retval = (dx > dy) ? 1 : ((dx < dy) ? -1 : 0);
			break;
		}
		} /* switch */
		/* Free key copies. */
		if (x != *(char **)xarg) free(x);
		if (y != *(char **)yarg) free(y);
		/* if (retval) break; - done by for () anyway */
#else
		/* Integer version of -n for tiny systems */
		case FLAG_n:
			retval = atoi(x) - atoi(y);
			break;
		} /* switch */
#endif
	} /* for */

	/* Perform fallback sort if necessary */
	if (!retval && !(option_mask32 & FLAG_s))
		retval = strcmp(*(char **)xarg, *(char **)yarg);

	if (flags & FLAG_r) return -retval;
	return retval;
}

#if ENABLE_FEATURE_SORT_BIG
static unsigned str2u(char **str)
{
	unsigned long lu;
	if (!isdigit((*str)[0]))
		bb_error_msg_and_die("bad field specification");
	lu = strtoul(*str, str, 10);
	if ((sizeof(long) > sizeof(int) && lu > INT_MAX) || !lu)
		bb_error_msg_and_die("bad field specification");
	return lu;
}
#endif

int sort_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int sort_main(int argc UNUSED_PARAM, char **argv)
{
	FILE *fp, *outfile = stdout;
	char *line, **lines = NULL;
	char *str_ignored, *str_o, *str_t;
	llist_t *lst_k = NULL;
	int i, flag;
	int linecount = 0;

	xfunc_error_retval = 2;

	/* Parse command line options */
	/* -o and -t can be given at most once */
	opt_complementary = "o--o:t--t:" /* -t, -o: maximum one of each */
			"k::"; /* -k takes list */
	getopt32(argv, OPT_STR, &str_ignored, &str_ignored, &str_o, &lst_k, &str_t);
#if ENABLE_FEATURE_SORT_BIG
	if (option_mask32 & FLAG_o) outfile = xfopen_for_write(str_o);
	if (option_mask32 & FLAG_t) {
		if (!str_t[0] || str_t[1])
			bb_error_msg_and_die("bad -t parameter");
		key_separator = str_t[0];
	}
	/* parse sort key */
	while (lst_k) {
		enum {
			FLAG_allowed_for_k =
				FLAG_n | /* Numeric sort */
				FLAG_g | /* Sort using strtod() */
				FLAG_M | /* Sort date */
				FLAG_b | /* Ignore leading blanks */
				FLAG_r | /* Reverse */
				FLAG_d | /* Ignore !(isalnum()|isspace()) */
				FLAG_f | /* Force uppercase */
				FLAG_i | /* Ignore !isprint() */
			0
		};
		struct sort_key *key = add_key();
		char *str_k = llist_pop(&lst_k);
		const char *temp2;

		i = 0; /* i==0 before comma, 1 after (-k3,6) */
		while (*str_k) {
			/* Start of range */
			/* Cannot use bb_strtou - suffix can be a letter */
			key->range[2*i] = str2u(&str_k);
			if (*str_k == '.') {
				str_k++;
				key->range[2*i+1] = str2u(&str_k);
			}
			while (*str_k) {
				if (*str_k == ',' && !i++) {
					str_k++;
					break;
				} /* no else needed: fall through to syntax error
					 because comma isn't in OPT_STR */
				temp2 = strchr(OPT_STR, *str_k);
				if (!temp2)
					bb_error_msg_and_die("unknown key option");
				flag = 1 << (temp2 - OPT_STR);
				if (flag & ~FLAG_allowed_for_k)
					bb_error_msg_and_die("unknown sort type");
				/* b after ',' means strip _trailing_ space */
				if (i && flag == FLAG_b) flag = FLAG_bb;
				key->flags |= flag;
				str_k++;
			}
		}
	}
#endif
	/* global b strips leading and trailing spaces */
	if (option_mask32 & FLAG_b) option_mask32 |= FLAG_bb;

	/* Open input files and read data */
	argv += optind;
	if (!*argv)
		*--argv = (char*)"-";
	do {
		/* coreutils 6.9 compat: abort on first open error,
		 * do not continue to next file: */
		fp = xfopen_stdin(*argv);
		for (;;) {
			line = GET_LINE(fp);
			if (!line) break;
			lines = xrealloc_vector(lines, 6, linecount);
			lines[linecount++] = line;
		}
		fclose_if_not_stdin(fp);
	} while (*++argv);

#if ENABLE_FEATURE_SORT_BIG
	/* if no key, perform alphabetic sort */
	if (!key_list)
		add_key()->range[0] = 1;
	/* handle -c */
	if (option_mask32 & FLAG_c) {
		int j = (option_mask32 & FLAG_u) ? -1 : 0;
		for (i = 1; i < linecount; i++)
			if (compare_keys(&lines[i-1], &lines[i]) > j) {
				fprintf(stderr, "Check line %d\n", i);
				return EXIT_FAILURE;
			}
		return EXIT_SUCCESS;
	}
#endif
	/* Perform the actual sort */
	qsort(lines, linecount, sizeof(char *), compare_keys);
	/* handle -u */
	if (option_mask32 & FLAG_u) {
		flag = 0;
		/* coreutils 6.3 drop lines for which only key is the same */
		/* -- disabling last-resort compare... */
		option_mask32 |= FLAG_s;
		for (i = 1; i < linecount; i++) {
			if (!compare_keys(&lines[flag], &lines[i]))
				free(lines[i]);
			else
				lines[++flag] = lines[i];
		}
		if (linecount) linecount = flag+1;
	}
	/* Print it */
	flag = (option_mask32 & FLAG_z) ? '\0' : '\n';
	for (i = 0; i < linecount; i++)
		fprintf(outfile, "%s%c", lines[i], flag);

	fflush_stdout_and_exit(EXIT_SUCCESS);
}
1	niro	532	/* vi: set sw=4 ts=4: */
2			/*
3			* SuS3 compliant sort implementation for busybox
4			*
5			* Copyright (C) 2004 by Rob Landley <rob@landley.net>
6			*
7			* MAINTAINER: Rob Landley <rob@landley.net>
8			*
9			* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
10			*
11			* See SuS3 sort standard at:
12			* http://www.opengroup.org/onlinepubs/007904975/utilities/sort.html
13			*/
14
15	niro	816	#include "libbb.h"
16	niro	532
17	niro	816	/* This is a NOEXEC applet. Be very careful! */
18
19
20	niro	532	/*
21			sort [-m][-o output][-bdfinru][-t char][-k keydef]... [file...]
22			sort -c [-bdfinru][-t char][-k keydef][file]
23			*/
24
25			/* These are sort types */
26	niro	816	static const char OPT_STR[] ALIGN1 = "ngMucszbrdfimS:T:o:k:t:";
27	niro	532	enum {
28			FLAG_n = 1, /* Numeric sort */
29			FLAG_g = 2, /* Sort using strtod() */
30			FLAG_M = 4, /* Sort date */
31			/* ucsz apply to root level only, not keys. b at root level implies bb */
32			FLAG_u = 8, /* Unique */
33			FLAG_c = 0x10, /* Check: no output, exit(!ordered) */
34			FLAG_s = 0x20, /* Stable sort, no ascii fallback at end */
35	niro	816	FLAG_z = 0x40, /* Input and output is NUL terminated, not \n */
36	niro	532	/* These can be applied to search keys, the previous four can't */
37			FLAG_b = 0x80, /* Ignore leading blanks */
38			FLAG_r = 0x100, /* Reverse */
39			FLAG_d = 0x200, /* Ignore !(isalnum()\|isspace()) */
40			FLAG_f = 0x400, /* Force uppercase */
41			FLAG_i = 0x800, /* Ignore !isprint() */
42			FLAG_m = 0x1000, /* ignored: merge already sorted files; do not sort */
43			FLAG_S = 0x2000, /* ignored: -S, --buffer-size=SIZE */
44			FLAG_T = 0x4000, /* ignored: -T, --temporary-directory=DIR */
45			FLAG_o = 0x8000,
46			FLAG_k = 0x10000,
47			FLAG_t = 0x20000,
48			FLAG_bb = 0x80000000, /* Ignore trailing blanks */
49			};
50
51			#if ENABLE_FEATURE_SORT_BIG
52			static char key_separator;
53
54			static struct sort_key {
55			struct sort_key next_key; / linked list */
56			unsigned range[4]; /* start word, start char, end word, end char */
57			unsigned flags;
58			} *key_list;
59
60			static char get_key(char str, struct sort_key *key, int flags)
61			{
62	niro	816	int start = 0, end = 0, len, j;
63			unsigned i;
64	niro	532
65			/* Special case whole string, so we don't have to make a copy */
66			if (key->range[0] == 1 && !key->range[1] && !key->range[2] && !key->range[3]
67			&& !(flags & (FLAG_b \| FLAG_d \| FLAG_f \| FLAG_i \| FLAG_bb))
68			) {
69			return str;
70			}
71
72			/* Find start of key on first pass, end on second pass */
73			len = strlen(str);
74			for (j = 0; j < 2; j++) {
75			if (!key->range[2*j])
76			end = len;
77			/* Loop through fields */
78			else {
79			end = 0;
80			for (i = 1; i < key->range[2*j] + j; i++) {
81			if (key_separator) {
82			/* Skip body of key and separator */
83			while (str[end]) {
84			if (str[end++] == key_separator)
85			break;
86			}
87			} else {
88			/* Skip leading blanks */
89			while (isspace(str[end]))
90			end++;
91			/* Skip body of key */
92			while (str[end]) {
93			if (isspace(str[end]))
94			break;
95			end++;
96			}
97			}
98			}
99			}
100			if (!j) start = end;
101			}
102			/* Strip leading whitespace if necessary */
103			//XXX: skip_whitespace()
104			if (flags & FLAG_b)
105			while (isspace(str[start])) start++;
106			/* Strip trailing whitespace if necessary */
107			if (flags & FLAG_bb)
108			while (end > start && isspace(str[end-1])) end--;
109			/* Handle offsets on start and end */
110			if (key->range[3]) {
111			end += key->range[3] - 1;
112			if (end > len) end = len;
113			}
114			if (key->range[1]) {
115			start += key->range[1] - 1;
116			if (start > len) start = len;
117			}
118			/* Make the copy */
119			if (end < start) end = start;
120			str = xstrndup(str+start, end-start);
121			/* Handle -d */
122			if (flags & FLAG_d) {
123			for (start = end = 0; str[end]; end++)
124			if (isspace(str[end]) \|\| isalnum(str[end]))
125			str[start++] = str[end];
126			str[start] = '\0';
127			}
128			/* Handle -i */
129			if (flags & FLAG_i) {
130			for (start = end = 0; str[end]; end++)
131			if (isprint(str[end]))
132			str[start++] = str[end];
133			str[start] = '\0';
134			}
135			/* Handle -f */
136			if (flags & FLAG_f)
137			for (i = 0; str[i]; i++)
138			str[i] = toupper(str[i]);
139
140			return str;
141			}
142
143			static struct sort_key *add_key(void)
144			{
145			struct sort_key **pkey = &key_list;
146			while (*pkey)
147			pkey = &((*pkey)->next_key);
148			return *pkey = xzalloc(sizeof(struct sort_key));
149			}
150
151			#define GET_LINE(fp) \
152			((option_mask32 & FLAG_z) \
153			? bb_get_chunk_from_file(fp, NULL) \
154	niro	816	: xmalloc_fgetline(fp))
155	niro	532	#else
156	niro	816	#define GET_LINE(fp) xmalloc_fgetline(fp)
157	niro	532	#endif
158
159			/* Iterate through keys list and perform comparisons */
160			static int compare_keys(const void xarg, const void yarg)
161			{
162			int flags = option_mask32, retval = 0;
163			char x, y;
164
165			#if ENABLE_FEATURE_SORT_BIG
166			struct sort_key *key;
167
168			for (key = key_list; !retval && key; key = key->next_key) {
169			flags = key->flags ? key->flags : option_mask32;
170			/* Chop out and modify key chunks, handling -dfib */
171			x = get_key((char *)xarg, key, flags);
172			y = get_key((char *)yarg, key, flags);
173			#else
174			/* This curly bracket serves no purpose but to match the nesting
175			level of the for () loop we're not using */
176			{
177			x = (char *)xarg;
178			y = (char *)yarg;
179			#endif
180			/* Perform actual comparison */
181			switch (flags & 7) {
182			default:
183			bb_error_msg_and_die("unknown sort type");
184			break;
185			/* Ascii sort */
186			case 0:
187			#if ENABLE_LOCALE_SUPPORT
188			retval = strcoll(x, y);
189			#else
190			retval = strcmp(x, y);
191			#endif
192			break;
193			#if ENABLE_FEATURE_SORT_BIG
194			case FLAG_g: {
195			char xx, yy;
196			double dx = strtod(x, &xx);
197			double dy = strtod(y, &yy);
198			/* not numbers < NaN < -infinity < numbers < +infinity) */
199			if (x == xx)
200			retval = (y == yy ? 0 : -1);
201			else if (y == yy)
202			retval = 1;
203			/* Check for isnan */
204			else if (dx != dx)
205			retval = (dy != dy) ? 0 : -1;
206			else if (dy != dy)
207			retval = 1;
208			/* Check for infinity. Could underflow, but it avoids libm. */
209			else if (1.0 / dx == 0.0) {
210			if (dx < 0)
211			retval = (1.0 / dy == 0.0 && dy < 0) ? 0 : -1;
212			else
213			retval = (1.0 / dy == 0.0 && dy > 0) ? 0 : 1;
214			} else if (1.0 / dy == 0.0)
215			retval = (dy < 0) ? 1 : -1;
216			else
217			retval = (dx > dy) ? 1 : ((dx < dy) ? -1 : 0);
218			break;
219			}
220			case FLAG_M: {
221			struct tm thyme;
222			int dx;
223			char xx, yy;
224
225			xx = strptime(x, "%b", &thyme);
226			dx = thyme.tm_mon;
227			yy = strptime(y, "%b", &thyme);
228			if (!xx)
229			retval = (!yy) ? 0 : -1;
230			else if (!yy)
231			retval = 1;
232			else
233			retval = (dx == thyme.tm_mon) ? 0 : dx - thyme.tm_mon;
234			break;
235			}
236			/* Full floating point version of -n */
237			case FLAG_n: {
238			double dx = atof(x);
239			double dy = atof(y);
240			retval = (dx > dy) ? 1 : ((dx < dy) ? -1 : 0);
241			break;
242			}
243			} /* switch */
244			/* Free key copies. */
245			if (x != (char *)xarg) free(x);
246			if (y != (char *)yarg) free(y);
247			/* if (retval) break; - done by for () anyway */
248			#else
249			/* Integer version of -n for tiny systems */
250			case FLAG_n:
251			retval = atoi(x) - atoi(y);
252			break;
253			} /* switch */
254			#endif
255			} /* for */
256
257			/* Perform fallback sort if necessary */
258			if (!retval && !(option_mask32 & FLAG_s))
259			retval = strcmp((char )xarg, (char **)yarg);
260
261			if (flags & FLAG_r) return -retval;
262			return retval;
263			}
264
265			#if ENABLE_FEATURE_SORT_BIG
266			static unsigned str2u(char **str)
267			{
268			unsigned long lu;
269			if (!isdigit((*str)[0]))
270			bb_error_msg_and_die("bad field specification");
271			lu = strtoul(*str, str, 10);
272			if ((sizeof(long) > sizeof(int) && lu > INT_MAX) \|\| !lu)
273			bb_error_msg_and_die("bad field specification");
274			return lu;
275			}
276			#endif
277
278	niro	816	int sort_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
279			int sort_main(int argc UNUSED_PARAM, char **argv)
280	niro	532	{
281			FILE fp, outfile = stdout;
282			char line, *lines = NULL;
283	niro	816	char str_ignored, str_o, *str_t;
284			llist_t *lst_k = NULL;
285	niro	532	int i, flag;
286			int linecount = 0;
287
288			xfunc_error_retval = 2;
289
290			/* Parse command line options */
291			/* -o and -t can be given at most once */
292	niro	816	opt_complementary = "o--o:t--t:" /* -t, -o: maximum one of each */
293			"k::"; /* -k takes list */
294			getopt32(argv, OPT_STR, &str_ignored, &str_ignored, &str_o, &lst_k, &str_t);
295	niro	532	#if ENABLE_FEATURE_SORT_BIG
296	niro	816	if (option_mask32 & FLAG_o) outfile = xfopen_for_write(str_o);
297	niro	532	if (option_mask32 & FLAG_t) {
298			if (!str_t[0] \|\| str_t[1])
299			bb_error_msg_and_die("bad -t parameter");
300			key_separator = str_t[0];
301			}
302			/* parse sort key */
303	niro	816	while (lst_k) {
304	niro	532	enum {
305			FLAG_allowed_for_k =
306			FLAG_n \| /* Numeric sort */
307			FLAG_g \| /* Sort using strtod() */
308			FLAG_M \| /* Sort date */
309			FLAG_b \| /* Ignore leading blanks */
310			FLAG_r \| /* Reverse */
311			FLAG_d \| /* Ignore !(isalnum()\|isspace()) */
312			FLAG_f \| /* Force uppercase */
313			FLAG_i \| /* Ignore !isprint() */
314			0
315			};
316			struct sort_key *key = add_key();
317	niro	816	char *str_k = llist_pop(&lst_k);
318	niro	532	const char *temp2;
319
320			i = 0; /* i==0 before comma, 1 after (-k3,6) */
321			while (*str_k) {
322			/* Start of range */
323			/* Cannot use bb_strtou - suffix can be a letter */
324			key->range[2*i] = str2u(&str_k);
325			if (*str_k == '.') {
326			str_k++;
327			key->range[2*i+1] = str2u(&str_k);
328			}
329			while (*str_k) {
330			if (*str_k == ',' && !i++) {
331			str_k++;
332			break;
333			} /* no else needed: fall through to syntax error
334			because comma isn't in OPT_STR */
335			temp2 = strchr(OPT_STR, *str_k);
336			if (!temp2)
337			bb_error_msg_and_die("unknown key option");
338			flag = 1 << (temp2 - OPT_STR);
339			if (flag & ~FLAG_allowed_for_k)
340			bb_error_msg_and_die("unknown sort type");
341			/* b after ',' means strip _trailing_ space */
342			if (i && flag == FLAG_b) flag = FLAG_bb;
343			key->flags \|= flag;
344			str_k++;
345			}
346			}
347			}
348			#endif
349			/* global b strips leading and trailing spaces */
350			if (option_mask32 & FLAG_b) option_mask32 \|= FLAG_bb;
351
352			/* Open input files and read data */
353	niro	816	argv += optind;
354			if (!*argv)
355			--argv = (char)"-";
356			do {
357			/* coreutils 6.9 compat: abort on first open error,
358			* do not continue to next file: */
359			fp = xfopen_stdin(*argv);
360	niro	532	for (;;) {
361			line = GET_LINE(fp);
362			if (!line) break;
363	niro	816	lines = xrealloc_vector(lines, 6, linecount);
364	niro	532	lines[linecount++] = line;
365			}
366	niro	816	fclose_if_not_stdin(fp);
367			} while (*++argv);
368
369	niro	532	#if ENABLE_FEATURE_SORT_BIG
370			/* if no key, perform alphabetic sort */
371			if (!key_list)
372			add_key()->range[0] = 1;
373			/* handle -c */
374			if (option_mask32 & FLAG_c) {
375			int j = (option_mask32 & FLAG_u) ? -1 : 0;
376			for (i = 1; i < linecount; i++)
377			if (compare_keys(&lines[i-1], &lines[i]) > j) {
378			fprintf(stderr, "Check line %d\n", i);
379	niro	816	return EXIT_FAILURE;
380	niro	532	}
381	niro	816	return EXIT_SUCCESS;
382	niro	532	}
383			#endif
384			/* Perform the actual sort */
385			qsort(lines, linecount, sizeof(char *), compare_keys);
386			/* handle -u */
387			if (option_mask32 & FLAG_u) {
388			flag = 0;
389			/* coreutils 6.3 drop lines for which only key is the same */
390			/* -- disabling last-resort compare... */
391			option_mask32 \|= FLAG_s;
392			for (i = 1; i < linecount; i++) {
393			if (!compare_keys(&lines[flag], &lines[i]))
394			free(lines[i]);
395			else
396			lines[++flag] = lines[i];
397			}
398			if (linecount) linecount = flag+1;
399			}
400			/* Print it */
401	niro	816	flag = (option_mask32 & FLAG_z) ? '\0' : '\n';
402	niro	532	for (i = 0; i < linecount; i++)
403	niro	816	fprintf(outfile, "%s%c", lines[i], flag);
404	niro	532
405			fflush_stdout_and_exit(EXIT_SUCCESS);
406			}