*
* MAINTAINER: Rob Landley <rob@landley.net>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* See SuS3 sort standard at:
* http://www.opengroup.org/onlinepubs/007904975/utilities/sort.html
*/
-#include "busybox.h"
+//usage:#define sort_trivial_usage
+//usage: "[-nru"
+//usage: IF_FEATURE_SORT_BIG("gMcszbdfimSTokt] [-o FILE] [-k start[.offset][opts][,end[.offset][opts]] [-t CHAR")
+//usage: "] [FILE]..."
+//usage:#define sort_full_usage "\n\n"
+//usage: "Sort lines of text\n"
+//usage: IF_FEATURE_SORT_BIG(
+//usage: "\n -b Ignore leading blanks"
+//usage: "\n -c Check whether input is sorted"
+//usage: "\n -d Dictionary order (blank or alphanumeric only)"
+//usage: "\n -f Ignore case"
+//usage: "\n -g General numerical sort"
+//usage: "\n -i Ignore unprintable characters"
+//usage: "\n -k Sort key"
+//usage: "\n -M Sort month"
+//usage: )
+//usage: "\n -n Sort numbers"
+//usage: IF_FEATURE_SORT_BIG(
+//usage: "\n -o Output to file"
+//usage: "\n -k Sort by key"
+//usage: "\n -t CHAR Key separator"
+//usage: )
+//usage: "\n -r Reverse sort order"
+//usage: IF_FEATURE_SORT_BIG(
+//usage: "\n -s Stable (don't sort ties alphabetically)"
+//usage: )
+//usage: "\n -u Suppress duplicate lines"
+//usage: IF_FEATURE_SORT_BIG(
+//usage: "\n -z Lines are terminated by NUL, not newline"
+//usage: "\n -mST Ignored for GNU compatibility")
+//usage:
+//usage:#define sort_example_usage
+//usage: "$ echo -e \"e\\nf\\nb\\nd\\nc\\na\" | sort\n"
+//usage: "a\n"
+//usage: "b\n"
+//usage: "c\n"
+//usage: "d\n"
+//usage: "e\n"
+//usage: "f\n"
+//usage: IF_FEATURE_SORT_BIG(
+//usage: "$ echo -e \"c 3\\nb 2\\nd 2\" | $SORT -k 2,2n -k 1,1r\n"
+//usage: "d 2\n"
+//usage: "b 2\n"
+//usage: "c 3\n"
+//usage: )
+//usage: ""
+
+#include "libbb.h"
+
+/* This is a NOEXEC applet. Be very careful! */
+
/*
sort [-m][-o output][-bdfinru][-t char][-k keydef]... [file...]
*/
/* These are sort types */
-static const char OPT_STR[] = "ngMucszbrdfimS:T:o:k:t:";
+static const char OPT_STR[] ALIGN1 = "ngMucszbrdfimS:T:o:k:t:";
enum {
FLAG_n = 1, /* Numeric sort */
FLAG_g = 2, /* Sort using strtod() */
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 is null terminated, not \n */
+ 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 */
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 */
+ 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, i, j;
+ 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]
/* Handle -i */
if (flags & FLAG_i) {
for (start = end = 0; str[end]; end++)
- if (isprint(str[end]))
+ if (isprint_asciionly(str[end]))
str[start++] = str[end];
str[start] = '\0';
}
#define GET_LINE(fp) \
((option_mask32 & FLAG_z) \
? bb_get_chunk_from_file(fp, NULL) \
- : xmalloc_getline(fp))
+ : xmalloc_fgetline(fp))
#else
-#define GET_LINE(fp) xmalloc_getline(fp)
+#define GET_LINE(fp) xmalloc_fgetline(fp)
#endif
/* Iterate through keys list and perform comparisons */
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 */
+ * level of the for () loop we're not using */
{
x = *(char **)xarg;
y = *(char **)yarg;
}
#endif
-int sort_main(int argc, char **argv);
-int sort_main(int argc, char **argv)
+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 *line, **lines;
char *str_ignored, *str_o, *str_t;
llist_t *lst_k = NULL;
int i, flag;
- int linecount = 0;
+ int linecount;
+ unsigned opts;
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 */
+ opt_complementary = "o--o:t--t:" /* -t, -o: at most one of each */
"k::"; /* -k takes list */
- getopt32(argc, argv, OPT_STR, &str_ignored, &str_ignored, &str_o, &lst_k, &str_t);
+ opts = getopt32(argv, OPT_STR, &str_ignored, &str_ignored, &str_o, &lst_k, &str_t);
+ /* global b strips leading and trailing spaces */
+ if (opts & FLAG_b)
+ option_mask32 |= FLAG_bb;
#if ENABLE_FEATURE_SORT_BIG
- if (option_mask32 & FLAG_o) outfile = xfopen(str_o, "w");
- if (option_mask32 & FLAG_t) {
+ if (opts & FLAG_t) {
if (!str_t[0] || str_t[1])
bb_error_msg_and_die("bad -t parameter");
key_separator = str_t[0];
}
+ /* note: below this point we use option_mask32, not opts,
+ * since that reduces register pressure and makes code smaller */
+
/* parse sort key */
- lst_k = llist_rev(lst_k);
while (lst_k) {
enum {
FLAG_allowed_for_k =
0
};
struct sort_key *key = add_key();
- char *str_k = lst_k->data;
- const char *temp2;
+ char *str_k = llist_pop(&lst_k);
i = 0; /* i==0 before comma, 1 after (-k3,6) */
while (*str_k) {
key->range[2*i+1] = str2u(&str_k);
}
while (*str_k) {
+ const char *temp2;
+
if (*str_k == ',' && !i++) {
str_k++;
break;
} /* no else needed: fall through to syntax error
- because comma isn't in OPT_STR */
+ because comma isn't in OPT_STR */
temp2 = strchr(OPT_STR, *str_k);
if (!temp2)
bb_error_msg_and_die("unknown key option");
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;
+ if (i && flag == FLAG_b)
+ flag = FLAG_bb;
key->flags |= flag;
str_k++;
}
}
- /* leaking lst_k... */
- lst_k = lst_k->link;
}
#endif
- /* global b strips leading and trailing spaces */
- if (option_mask32 & FLAG_b) option_mask32 |= FLAG_bb;
/* Open input files and read data */
- for (i = argv[optind] ? optind : optind-1; argv[i]; i++) {
- fp = stdin;
- if (i >= optind && NOT_LONE_DASH(argv[i]))
- fp = xfopen(argv[i], "r");
+ argv += optind;
+ if (!*argv)
+ *--argv = (char*)"-";
+ linecount = 0;
+ lines = NULL;
+ do {
+ /* coreutils 6.9 compat: abort on first open error,
+ * do not continue to next file: */
+ FILE *fp = xfopen_stdin(*argv);
for (;;) {
line = GET_LINE(fp);
- if (!line) break;
- if (!(linecount & 63))
- lines = xrealloc(lines, sizeof(char *) * (linecount + 64));
+ if (!line)
+ break;
+ lines = xrealloc_vector(lines, 6, linecount);
lines[linecount++] = line;
}
- fclose(fp);
- }
+ fclose_if_not_stdin(fp);
+ } while (*++argv);
+
#if ENABLE_FEATURE_SORT_BIG
/* if no key, perform alphabetic sort */
if (!key_list)
/* handle -c */
if (option_mask32 & FLAG_c) {
int j = (option_mask32 & FLAG_u) ? -1 : 0;
- for (i = 1; i < linecount; i++)
+ for (i = 1; i < linecount; i++) {
if (compare_keys(&lines[i-1], &lines[i]) > j) {
- fprintf(stderr, "Check line %d\n", i);
- return 1;
+ fprintf(stderr, "Check line %u\n", i);
+ return EXIT_FAILURE;
}
- return 0;
+ }
+ return EXIT_SUCCESS;
}
#endif
/* Perform the actual sort */
- qsort(lines, linecount, sizeof(char *), compare_keys);
+ qsort(lines, linecount, sizeof(lines[0]), compare_keys);
/* handle -u */
if (option_mask32 & FLAG_u) {
flag = 0;
/* -- disabling last-resort compare... */
option_mask32 |= FLAG_s;
for (i = 1; i < linecount; i++) {
- if (!compare_keys(&lines[flag], &lines[i]))
+ if (compare_keys(&lines[flag], &lines[i]) == 0)
free(lines[i]);
else
lines[++flag] = lines[i];
}
- if (linecount) linecount = flag+1;
+ if (linecount)
+ linecount = flag+1;
}
+
/* Print it */
+#if ENABLE_FEATURE_SORT_BIG
+ /* Open output file _after_ we read all input ones */
+ if (option_mask32 & FLAG_o)
+ xmove_fd(xopen(str_o, O_WRONLY|O_CREAT|O_TRUNC), STDOUT_FILENO);
+#endif
+ flag = (option_mask32 & FLAG_z) ? '\0' : '\n';
for (i = 0; i < linecount; i++)
- fprintf(outfile, "%s\n", lines[i]);
+ printf("%s%c", lines[i], flag);
fflush_stdout_and_exit(EXIT_SUCCESS);
}
projects / platform / upstream / busybox.git / blobdiff