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Audit sort(1) and mark it as finished

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1) Remove the function prototypes. No need for them, as the
   functions are ordered.
2) Add fieldseplen, so the length of the field-separator is not
   calculated nearly each time skipcolumn() is called.
3) rename next_col to skip_to_next_col so the purpose is clear,
   also reorder the conditional accordingly.
4) Put parentheses around certain ternary expressions.
5) BUGFIX: Don't just exit() in check(), but make it return something,
   so we can cleanly fshut() everything.
6) OFF-POSIX: Posix for no apparent reason does not allow more than
   one file when the -c or -C flags are given.
   This can be problematic when you want to check multiple files.
   With the change 5), rewriting check() to return a value, I went
   off-posix after discussing this with Dimitris to just allow
   arbitrary numbers of files. Obviously, this does not break scripts
   and is convenient for everybody who wants to quickly check a big
   amount of files.
   As soon as 1 file is "unsorted", the return value is 1, as expected.
   For convenience reasons, check()'s warning now includes the filename.
7) BUGFIX: Set ret to 2 instead of 1 when the fshut(fp, *argv) fails.
8) BUGFIX: Don't forget to fshut stderr at the end. This would improperly
   return 1 in the following case:
   $ sort -c unsorted_file 2> /dev/full
9) Other style changes, line length, empty line before return.
This commit is contained in:
FRIGN 2015-08-04 12:45:59 +02:00 committed by sin
parent 0a2562e994
commit 51390a3c51
2 changed files with 37 additions and 29 deletions
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2
README
View File

@ -69,7 +69,7 @@ The following tools are implemented:
=*|x sha256sum .
=*|x sha512sum .
=*|o sleep .
# sort (-d, -f, -i)
#*|o sort (-d, -f, -i)
=*|o split .
=*|x sponge .
#*|o strings .

64
sort.c
View File

@ -27,17 +27,9 @@ enum {
static TAILQ_HEAD(kdhead, keydef) kdhead = TAILQ_HEAD_INITIALIZER(kdhead);
static char *skipblank(char *);
static char *skipnonblank(char *);
static char *skipcolumn(char *, char *, int);
static size_t columns(char *, const struct keydef *, char **, size_t *);
static int linecmp(const char **, const char **);
static void check(FILE *);
static int parse_flags(char **, int *, int);
static void addkeydef(char *, int);
static int Cflag = 0, cflag = 0, uflag = 0;
static char *fieldsep = NULL;
static size_t fieldseplen = 0;
static char *col1, *col2;
static size_t col1siz, col2siz;
@ -46,6 +38,7 @@ skipblank(char *s)
{
while (*s == ' ' || *s == '\t')
s++;
return s;
}
@ -54,21 +47,25 @@ skipnonblank(char *s)
{
while (*s && *s != '\n' && *s != ' ' && *s != '\t')
s++;
return s;
}
static char *
skipcolumn(char *s, char *eol, int next_col)
skipcolumn(char *s, char *eol, int skip_to_next_col)
{
if (fieldsep) {
if ((s = strstr(s, fieldsep)))
s += next_col ? strlen(fieldsep) : 0;
else
if ((s = strstr(s, fieldsep))) {
if (skip_to_next_col)
s += fieldseplen;
} else {
s = eol;
}
} else {
s = skipblank(s);
s = skipnonblank(s);
}
return s;
}
@ -107,13 +104,14 @@ columns(char *line, const struct keydef *kd, char **col, size_t *colsiz)
} else {
end = eol;
}
len = start > end ? 0 : end - start;
len = (start > end) ? 0 : (end - start);
if (!*col || *colsiz < len)
*col = erealloc(*col, len + 1);
memcpy(*col, start, len);
(*col)[len] = '\0';
if (*colsiz < len)
*colsiz = len;
return len;
}
@ -136,7 +134,7 @@ linecmp(const char **a, const char **b)
} else if (kd->flags & MOD_N) {
x = strtold(col1, NULL);
y = strtold(col2, NULL);
res = (x < y) ? (-1) : (x > y);
res = (x < y) ? -1 : (x > y);
} else {
res = strcmp(col1, col2);
}
@ -150,23 +148,26 @@ linecmp(const char **a, const char **b)
return res;
}
static void
check(FILE *fp)
static int
check(FILE *fp, const char *fname)
{
static struct { char *buf; size_t size; } prev, cur, tmp;
if (!prev.buf && getline(&prev.buf, &prev.size, fp) < 0)
eprintf("getline:");
while (getline(&cur.buf, &cur.size, fp) > 0) {
if (uflag > linecmp((const char **) &cur.buf, (const char **) &prev.buf)) {
if (uflag > linecmp((const char **)&cur.buf,
(const char **)&prev.buf)) {
if (!Cflag)
weprintf("disorder: %s", cur.buf);
exit(1);
weprintf("disorder %s: %s", fname, cur.buf);
return 1;
}
tmp = cur;
cur = prev;
prev = tmp;
}
return 0;
}
static int
@ -212,7 +213,8 @@ addkeydef(char *kdstr, int flags)
if (*kdstr == '.') {
if ((kd->start_char = strtol(kdstr + 1, &kdstr, 10)) < 1)
enprintf(2, "invalid start character in key definition\n");
enprintf(2, "invalid start character in key "
"definition\n");
}
if (parse_flags(&kdstr, &kd->flags, MOD_STARTB) < 0)
enprintf(2, "invalid start flags in key definition\n");
@ -222,7 +224,8 @@ addkeydef(char *kdstr, int flags)
enprintf(2, "invalid end column in key definition\n");
if (*kdstr == '.') {
if ((kd->end_char = strtol(kdstr + 1, &kdstr, 10)) < 0)
enprintf(2, "invalid end character in key definition\n");
enprintf(2, "invalid end character in key "
"definition\n");
}
if (parse_flags(&kdstr, &kd->flags, MOD_ENDB) < 0)
enprintf(2, "invalid end flags in key definition\n");
@ -281,6 +284,7 @@ main(int argc, char *argv[])
break;
case 't':
fieldsep = EARGF(usage());
fieldseplen = strlen(fieldsep);
break;
case 'u':
uflag = 1;
@ -296,7 +300,8 @@ main(int argc, char *argv[])
if (!argc) {
if (Cflag || cflag) {
check(stdin);
if (check(stdin, "<stdin>") && !ret)
ret = 1;
} else {
getlines(stdin, &linebuf);
}
@ -309,12 +314,13 @@ main(int argc, char *argv[])
continue;
}
if (Cflag || cflag) {
check(fp);
if (check(fp, *argv) && !ret)
ret = 1;
} else {
getlines(fp, &linebuf);
}
if (fp != stdin && fshut(fp, *argv))
ret = 1;
ret = 2;
}
if (!Cflag && !cflag) {
@ -325,14 +331,16 @@ main(int argc, char *argv[])
(int (*)(const void *, const void *))linecmp);
for (i = 0; i < linebuf.nlines; i++) {
if (!uflag || i == 0 || linecmp((const char **)&linebuf.lines[i],
(const char **)&linebuf.lines[i-1])) {
if (!uflag || i == 0 ||
linecmp((const char **)&linebuf.lines[i],
(const char **)&linebuf.lines[i - 1])) {
fputs(linebuf.lines[i], ofp);
}
}
}
if (fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>"))
if (fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>") |
fshut(stderr, "<stderr>"))
ret = 2;
return ret;