initial import

1 files changed, 570 insertions, 0 deletions

diff --git a/string/tester.c b/string/tester.c
new file mode 100644
index 0000000000..74ac34541e
--- /dev/null
+++ b/string/tester.c
@@ -0,0 +1,570 @@
+#include <ansidecl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <fcntl.h>
+
+#ifndef HAVE_GNU_LD
+#define _sys_nerr	sys_nerr
+#define _sys_errlist	sys_errlist
+#endif
+
+#define	STREQ(a, b)	(strcmp((a), (b)) == 0)
+
+CONST char *it = "<UNSET>";	/* Routine name for message routines. */
+size_t errors = 0;
+
+/* Complain if condition is not true.  */
+void
+DEFUN(check, (thing, number), int thing AND int number)
+{
+  if (!thing)
+    {
+      printf("%s flunked test %d\n", it, number);
+      ++errors;
+    }
+}
+
+/* Complain if first two args don't strcmp as equal.  */
+void
+DEFUN(equal, (a, b, number), CONST char *a AND CONST char *b AND int number)
+{
+  check(a != NULL && b != NULL && STREQ(a, b), number);
+}
+
+char one[50];
+char two[50];
+
+int
+DEFUN(main, (argc, argv), int argc AND char **argv)
+{
+  /* Test strcmp first because we use it to test other things.  */
+  it = "strcmp";
+  check(strcmp("", "") == 0, 1);		/* Trivial case. */
+  check(strcmp("a", "a") == 0, 2);		/* Identity. */
+  check(strcmp("abc", "abc") == 0, 3);		/* Multicharacter. */
+  check(strcmp("abc", "abcd") < 0, 4);		/* Length mismatches. */
+  check(strcmp("abcd", "abc") > 0, 5);
+  check(strcmp("abcd", "abce") < 0, 6);		/* Honest miscompares. */
+  check(strcmp("abce", "abcd") > 0, 7);
+  check(strcmp("a\203", "a") > 0, 8);		/* Tricky if char signed. */
+  check(strcmp("a\203", "a\003") > 0, 9);
+
+  /* Test strcpy next because we need it to set up other tests.  */
+  it = "strcpy";
+  check(strcpy(one, "abcd") == one, 1);	/* Returned value. */
+  equal(one, "abcd", 2);		/* Basic test. */
+
+  (void) strcpy(one, "x");
+  equal(one, "x", 3);			/* Writeover. */
+  equal(one+2, "cd", 4);		/* Wrote too much? */
+
+  (void) strcpy(two, "hi there");
+  (void) strcpy(one, two);
+  equal(one, "hi there", 5);		/* Basic test encore. */
+  equal(two, "hi there", 6);		/* Stomped on source? */
+
+  (void) strcpy(one, "");
+  equal(one, "", 7);			/* Boundary condition. */
+
+  /* strcat.  */
+  it = "strcat";
+  (void) strcpy(one, "ijk");
+  check(strcat(one, "lmn") == one, 1);	/* Returned value. */
+  equal(one, "ijklmn", 2);		/* Basic test. */
+
+  (void) strcpy(one, "x");
+  (void) strcat(one, "yz");
+  equal(one, "xyz", 3);			/* Writeover. */
+  equal(one+4, "mn", 4);			/* Wrote too much? */
+
+  (void) strcpy(one, "gh");
+  (void) strcpy(two, "ef");
+  (void) strcat(one, two);
+  equal(one, "ghef", 5);			/* Basic test encore. */
+  equal(two, "ef", 6);			/* Stomped on source? */
+
+  (void) strcpy(one, "");
+  (void) strcat(one, "");
+  equal(one, "", 7);			/* Boundary conditions. */
+  (void) strcpy(one, "ab");
+  (void) strcat(one, "");
+  equal(one, "ab", 8);
+  (void) strcpy(one, "");
+  (void) strcat(one, "cd");
+  equal(one, "cd", 9);
+
+  /* strncat - first test it as strcat, with big counts,
+     then test the count mechanism.  */
+  it = "strncat";
+  (void) strcpy(one, "ijk");
+  check(strncat(one, "lmn", 99) == one, 1);	/* Returned value. */
+  equal(one, "ijklmn", 2);		/* Basic test. */
+
+  (void) strcpy(one, "x");
+  (void) strncat(one, "yz", 99);
+  equal(one, "xyz", 3);			/* Writeover. */
+  equal(one+4, "mn", 4);			/* Wrote too much? */
+
+  (void) strcpy(one, "gh");
+  (void) strcpy(two, "ef");
+  (void) strncat(one, two, 99);
+  equal(one, "ghef", 5);			/* Basic test encore. */
+  equal(two, "ef", 6);			/* Stomped on source? */
+
+  (void) strcpy(one, "");
+  (void) strncat(one, "", 99);
+  equal(one, "", 7);			/* Boundary conditions. */
+  (void) strcpy(one, "ab");
+  (void) strncat(one, "", 99);
+  equal(one, "ab", 8);
+  (void) strcpy(one, "");
+  (void) strncat(one, "cd", 99);
+  equal(one, "cd", 9);
+
+  (void) strcpy(one, "ab");
+  (void) strncat(one, "cdef", 2);
+  equal(one, "abcd", 10);			/* Count-limited. */
+
+  (void) strncat(one, "gh", 0);
+  equal(one, "abcd", 11);			/* Zero count. */
+
+  (void) strncat(one, "gh", 2);
+  equal(one, "abcdgh", 12);		/* Count and length equal. */
+
+  /* strncmp - first test as strcmp with big counts,
+     then test count code.  */
+  it = "strncmp";
+  check(strncmp("", "", 99) == 0, 1);	/* Trivial case. */
+  check(strncmp("a", "a", 99) == 0, 2);	/* Identity. */
+  check(strncmp("abc", "abc", 99) == 0, 3);	/* Multicharacter. */
+  check(strncmp("abc", "abcd", 99) < 0, 4);	/* Length unequal. */
+  check(strncmp("abcd", "abc", 99) > 0, 5);
+  check(strncmp("abcd", "abce", 99) < 0, 6);	/* Honestly unequal. */
+  check(strncmp("abce", "abcd", 99) > 0, 7);
+  check(strncmp("a\203", "a", 2) > 0, 8);	/* Tricky if '\203' < 0 */
+  check(strncmp("a\203", "a\003", 2) > 0, 9);
+  check(strncmp("abce", "abcd", 3) == 0, 10);	/* Count limited. */
+  check(strncmp("abce", "abc", 3) == 0, 11);	/* Count == length. */
+  check(strncmp("abcd", "abce", 4) < 0, 12);	/* Nudging limit. */
+  check(strncmp("abc", "def", 0) == 0, 13);	/* Zero count. */
+
+  /* strncpy - testing is a bit different because of odd semantics.  */
+  it = "strncpy";
+  check(strncpy(one, "abc", 4) == one, 1);	/* Returned value. */
+  equal(one, "abc", 2);			/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 2);
+  equal(one, "xycdefgh", 3);		/* Copy cut by count. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 3);		/* Copy cut just before NUL. */
+  equal(one, "xyzdefgh", 4);
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 4);		/* Copy just includes NUL. */
+  equal(one, "xyz", 5);
+  equal(one+4, "efgh", 6);		/* Wrote too much? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 5);		/* Copy includes padding. */
+  equal(one, "xyz", 7);
+  equal(one+4, "", 8);
+  equal(one+5, "fgh", 9);
+
+  (void) strcpy(one, "abc");
+  (void) strncpy(one, "xyz", 0);		/* Zero-length copy. */
+  equal(one, "abc", 10);	
+
+  (void) strncpy(one, "", 2);		/* Zero-length source. */
+  equal(one, "", 11);
+  equal(one+1, "", 12);	
+  equal(one+2, "c", 13);
+
+  (void) strcpy(one, "hi there");
+  (void) strncpy(two, one, 9);
+  equal(two, "hi there", 14);		/* Just paranoia. */
+  equal(one, "hi there", 15);		/* Stomped on source? */
+
+  /* strlen.  */
+  it = "strlen";
+  check(strlen("") == 0, 1);		/* Empty. */
+  check(strlen("a") == 1, 2);		/* Single char. */
+  check(strlen("abcd") == 4, 3);		/* Multiple chars. */
+
+  /* strchr.  */
+  it = "strchr";
+  check(strchr("abcd", 'z') == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(strchr(one, 'c') == one+2, 2);	/* Basic test. */
+  check(strchr(one, 'd') == one+3, 3);	/* End of string. */
+  check(strchr(one, 'a') == one, 4);	/* Beginning. */
+  check(strchr(one, '\0') == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(strchr(one, 'b') == one+1, 6);	/* Finding first. */
+  (void) strcpy(one, "");
+  check(strchr(one, 'b') == NULL, 7);	/* Empty string. */
+  check(strchr(one, '\0') == one, 8);	/* NUL in empty string. */
+
+#if 0
+  /* index - just like strchr.  */
+  it = "index";
+  check(index("abcd", 'z') == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(index(one, 'c') == one+2, 2);	/* Basic test. */
+  check(index(one, 'd') == one+3, 3);	/* End of string. */
+  check(index(one, 'a') == one, 4);	/* Beginning. */
+  check(index(one, '\0') == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(index(one, 'b') == one+1, 6);	/* Finding first. */
+  (void) strcpy(one, "");
+  check(index(one, 'b') == NULL, 7);	/* Empty string. */
+  check(index(one, '\0') == one, 8);	/* NUL in empty string. */
+#endif
+
+  /* strrchr.  */
+  it = "strrchr";
+  check(strrchr("abcd", 'z') == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(strrchr(one, 'c') == one+2, 2);	/* Basic test. */
+  check(strrchr(one, 'd') == one+3, 3);	/* End of string. */
+  check(strrchr(one, 'a') == one, 4);	/* Beginning. */
+  check(strrchr(one, '\0') == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(strrchr(one, 'b') == one+3, 6);	/* Finding last. */
+  (void) strcpy(one, "");
+  check(strrchr(one, 'b') == NULL, 7);	/* Empty string. */
+  check(strrchr(one, '\0') == one, 8);	/* NUL in empty string. */
+
+#if 0
+  /* rindex - just like strrchr.  */
+  it = "rindex";
+  check(rindex("abcd", 'z') == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(rindex(one, 'c') == one+2, 2);	/* Basic test. */
+  check(rindex(one, 'd') == one+3, 3);	/* End of string. */
+  check(rindex(one, 'a') == one, 4);	/* Beginning. */
+  check(rindex(one, '\0') == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(rindex(one, 'b') == one+3, 6);	/* Finding last. */
+  (void) strcpy(one, "");
+  check(rindex(one, 'b') == NULL, 7);	/* Empty string. */
+  check(rindex(one, '\0') == one, 8);	/* NUL in empty string. */
+#endif
+
+  /* strpbrk - somewhat like strchr.  */
+  it = "strpbrk";
+  check(strpbrk("abcd", "z") == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(strpbrk(one, "c") == one+2, 2);	/* Basic test. */
+  check(strpbrk(one, "d") == one+3, 3);	/* End of string. */
+  check(strpbrk(one, "a") == one, 4);	/* Beginning. */
+  check(strpbrk(one, "") == NULL, 5);	/* Empty search list. */
+  check(strpbrk(one, "cb") == one+1, 6);	/* Multiple search. */
+  (void) strcpy(one, "abcabdea");
+  check(strpbrk(one, "b") == one+1, 7);	/* Finding first. */
+  check(strpbrk(one, "cb") == one+1, 8);	/* With multiple search. */
+  check(strpbrk(one, "db") == one+1, 9);	/* Another variant. */
+  (void) strcpy(one, "");
+  check(strpbrk(one, "bc") == NULL, 10);	/* Empty string. */
+  check(strpbrk(one, "") == NULL, 11);	/* Both strings empty. */
+
+  /* strstr - somewhat like strchr.  */
+  it = "strstr";
+  check(strstr("abcd", "z") == NULL, 1);	/* Not found. */
+  check(strstr("abcd", "abx") == NULL, 2);	/* Dead end. */
+  (void) strcpy(one, "abcd");
+  check(strstr(one, "c") == one+2, 3);	/* Basic test. */
+  check(strstr(one, "bc") == one+1, 4);	/* Multichar. */
+  check(strstr(one, "d") == one+3, 5);	/* End of string. */
+  check(strstr(one, "cd") == one+2, 6);	/* Tail of string. */
+  check(strstr(one, "abc") == one, 7);	/* Beginning. */
+  check(strstr(one, "abcd") == one, 8);	/* Exact match. */
+  check(strstr(one, "abcde") == NULL, 9);	/* Too long. */
+  check(strstr(one, "de") == NULL, 10);	/* Past end. */
+  check(strstr(one, "") == one, 11);	/* Finding empty. */
+  (void) strcpy(one, "ababa");
+  check(strstr(one, "ba") == one+1, 12);	/* Finding first. */
+  (void) strcpy(one, "");
+  check(strstr(one, "b") == NULL, 13);	/* Empty string. */
+  check(strstr(one, "") == one, 14);	/* Empty in empty string. */
+  (void) strcpy(one, "bcbca");
+  check(strstr(one, "bca") == one+2, 15);	/* False start. */
+  (void) strcpy(one, "bbbcabbca");
+  check(strstr(one, "bbca") == one+1, 16);	/* With overlap. */
+
+  /* strspn.  */
+  it = "strspn";
+  check(strspn("abcba", "abc") == 5, 1);	/* Whole string. */
+  check(strspn("abcba", "ab") == 2, 2);	/* Partial. */
+  check(strspn("abc", "qx") == 0, 3);	/* None. */
+  check(strspn("", "ab") == 0, 4);	/* Null string. */
+  check(strspn("abc", "") == 0, 5);	/* Null search list. */
+
+  /* strcspn.  */
+  it = "strcspn";
+  check(strcspn("abcba", "qx") == 5, 1);	/* Whole string. */
+  check(strcspn("abcba", "cx") == 2, 2);	/* Partial. */
+  check(strcspn("abc", "abc") == 0, 3);	/* None. */
+  check(strcspn("", "ab") == 0, 4);	/* Null string. */
+  check(strcspn("abc", "") == 3, 5);	/* Null search list. */
+
+  /* strtok - the hard one.  */
+  it = "strtok";
+  (void) strcpy(one, "first, second, third");
+  equal(strtok(one, ", "), "first", 1);	/* Basic test. */
+  equal(one, "first", 2);
+  equal(strtok((char *)NULL, ", "), "second", 3);
+  equal(strtok((char *)NULL, ", "), "third", 4);
+  check(strtok((char *)NULL, ", ") == NULL, 5);
+  (void) strcpy(one, ", first, ");
+  equal(strtok(one, ", "), "first", 6);	/* Extra delims, 1 tok. */
+  check(strtok((char *)NULL, ", ") == NULL, 7);
+  (void) strcpy(one, "1a, 1b; 2a, 2b");
+  equal(strtok(one, ", "), "1a", 8);	/* Changing delim lists. */
+  equal(strtok((char *)NULL, "; "), "1b", 9);
+  equal(strtok((char *)NULL, ", "), "2a", 10);
+  (void) strcpy(two, "x-y");
+  equal(strtok(two, "-"), "x", 11);	/* New string before done. */
+  equal(strtok((char *)NULL, "-"), "y", 12);
+  check(strtok((char *)NULL, "-") == NULL, 13);
+  (void) strcpy(one, "a,b, c,, ,d");
+  equal(strtok(one, ", "), "a", 14);	/* Different separators. */
+  equal(strtok((char *)NULL, ", "), "b", 15);
+  equal(strtok((char *)NULL, " ,"), "c", 16);	/* Permute list too. */
+  equal(strtok((char *)NULL, " ,"), "d", 17);
+  check(strtok((char *)NULL, ", ") == NULL, 18);
+  check(strtok((char *)NULL, ", ") == NULL, 19);	/* Persistence. */
+  (void) strcpy(one, ", ");
+  check(strtok(one, ", ") == NULL, 20);	/* No tokens. */
+  (void) strcpy(one, "");
+  check(strtok(one, ", ") == NULL, 21);	/* Empty string. */
+  (void) strcpy(one, "abc");
+  equal(strtok(one, ", "), "abc", 22);	/* No delimiters. */
+  check(strtok((char *)NULL, ", ") == NULL, 23);
+  (void) strcpy(one, "abc");
+  equal(strtok(one, ""), "abc", 24);	/* Empty delimiter list. */
+  check(strtok((char *)NULL, "") == NULL, 25);
+  (void) strcpy(one, "abcdefgh");
+  (void) strcpy(one, "a,b,c");
+  equal(strtok(one, ","), "a", 26);	/* Basics again... */
+  equal(strtok((char *)NULL, ","), "b", 27);
+  equal(strtok((char *)NULL, ","), "c", 28);
+  check(strtok((char *)NULL, ",") == NULL, 29);
+  equal(one+6, "gh", 30);			/* Stomped past end? */
+  equal(one, "a", 31);			/* Stomped old tokens? */
+  equal(one+2, "b", 32);
+  equal(one+4, "c", 33);
+
+  /* memcmp.  */
+  it = "memcmp";
+  check(memcmp("a", "a", 1) == 0, 1);	/* Identity. */
+  check(memcmp("abc", "abc", 3) == 0, 2);	/* Multicharacter. */
+  check(memcmp("abcd", "abce", 4) < 0, 3);	/* Honestly unequal. */
+  check(memcmp("abce", "abcd", 4) > 0, 4);
+  check(memcmp("alph", "beta", 4) < 0, 5);
+  check(memcmp("a\203", "a\003", 2) > 0, 6);
+  check(memcmp("abce", "abcd", 3) == 0, 7);	/* Count limited. */
+  check(memcmp("abc", "def", 0) == 0, 8);	/* Zero count. */
+
+  /* memchr.  */
+  it = "memchr";
+  check(memchr("abcd", 'z', 4) == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(memchr(one, 'c', 4) == one+2, 2);	/* Basic test. */
+  check(memchr(one, 'd', 4) == one+3, 3);	/* End of string. */
+  check(memchr(one, 'a', 4) == one, 4);	/* Beginning. */
+  check(memchr(one, '\0', 5) == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(memchr(one, 'b', 5) == one+1, 6);	/* Finding first. */
+  check(memchr(one, 'b', 0) == NULL, 7);	/* Zero count. */
+  check(memchr(one, 'a', 1) == one, 8);	/* Singleton case. */
+  (void) strcpy(one, "a\203b");
+  check(memchr(one, 0203, 3) == one+1, 9);	/* Unsignedness. */
+
+  /* memcpy - need not work for overlap.  */
+  it = "memcpy";
+  check(memcpy(one, "abc", 4) == one, 1);	/* Returned value. */
+  equal(one, "abc", 2);			/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memcpy(one+1, "xyz", 2);
+  equal(one, "axydefgh", 3);		/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) memcpy(one, "xyz", 0);
+  equal(one, "abc", 4);			/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) memcpy(two, one, 9);
+  equal(two, "hi there", 5);		/* Just paranoia. */
+  equal(one, "hi there", 6);		/* Stomped on source? */
+
+  /* memmove - must work on overlap.  */
+  it = "memmove";
+  check(memmove(one, "abc", 4) == one, 1);	/* Returned value. */
+  equal(one, "abc", 2);			/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one+1, "xyz", 2);
+  equal(one, "axydefgh", 3);		/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) memmove(one, "xyz", 0);
+  equal(one, "abc", 4);			/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) memmove(two, one, 9);
+  equal(two, "hi there", 5);		/* Just paranoia. */
+  equal(one, "hi there", 6);		/* Stomped on source? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one+1, one, 9);
+  equal(one, "aabcdefgh", 7);		/* Overlap, right-to-left. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one+1, one+2, 7);
+  equal(one, "acdefgh", 8);		/* Overlap, left-to-right. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one, one, 9);
+  equal(one, "abcdefgh", 9);		/* 100% overlap. */
+
+  /* memccpy - first test like memcpy, then the search part
+     The SVID, the only place where memccpy is mentioned, says
+     overlap might fail, so we don't try it.  Besides, it's hard
+     to see the rationale for a non-left-to-right memccpy.  */
+  it = "memccpy";
+  check(memccpy(one, "abc", 'q', 4) == NULL, 1);	/* Returned value. */
+  equal(one, "abc", 2);			/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memccpy(one+1, "xyz", 'q', 2);
+  equal(one, "axydefgh", 3);		/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) memccpy(one, "xyz", 'q', 0);
+  equal(one, "abc", 4);			/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) memccpy(two, one, 'q', 9);
+  equal(two, "hi there", 5);		/* Just paranoia. */
+  equal(one, "hi there", 6);		/* Stomped on source? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strcpy(two, "horsefeathers");
+  check(memccpy(two, one, 'f', 9) == two+6, 7);	/* Returned value. */
+  equal(one, "abcdefgh", 8);		/* Source intact? */
+  equal(two, "abcdefeathers", 9);		/* Copy correct? */
+
+  (void) strcpy(one, "abcd");
+  (void) strcpy(two, "bumblebee");
+  check(memccpy(two, one, 'a', 4) == two+1, 10);	/* First char. */
+  equal(two, "aumblebee", 11);
+  check(memccpy(two, one, 'd', 4) == two+4, 12);	/* Last char. */
+  equal(two, "abcdlebee", 13);
+  (void) strcpy(one, "xyz");
+  check(memccpy(two, one, 'x', 1) == two+1, 14);	/* Singleton. */
+  equal(two, "xbcdlebee", 15);
+
+  /* memset.  */
+  it = "memset";
+  (void) strcpy(one, "abcdefgh");
+  check(memset(one+1, 'x', 3) == one+1, 1);	/* Return value. */
+  equal(one, "axxxefgh", 2);		/* Basic test. */
+
+  (void) memset(one+2, 'y', 0);
+  equal(one, "axxxefgh", 3);		/* Zero-length set. */
+
+  (void) memset(one+5, 0, 1);
+  equal(one, "axxxe", 4);			/* Zero fill. */
+  equal(one+6, "gh", 5);			/* And the leftover. */
+
+  (void) memset(one+2, 010045, 1);
+  equal(one, "ax\045xe", 6);		/* Unsigned char convert. */
+
+  /* bcopy - much like memcpy.
+     Berklix manual is silent about overlap, so don't test it.  */
+  it = "bcopy";
+  (void) bcopy("abc", one, 4);
+  equal(one, "abc", 1);			/* Simple copy. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) bcopy("xyz", one+1, 2);
+  equal(one, "axydefgh", 2);		/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) bcopy("xyz", one, 0);
+  equal(one, "abc", 3);			/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) bcopy(one, two, 9);
+  equal(two, "hi there", 4);		/* Just paranoia. */
+  equal(one, "hi there", 5);		/* Stomped on source? */
+
+  /* bzero.  */
+  it = "bzero";
+  (void) strcpy(one, "abcdef");
+  bzero(one+2, 2);
+  equal(one, "ab", 1);			/* Basic test. */
+  equal(one+3, "", 2);
+  equal(one+4, "ef", 3);
+
+  (void) strcpy(one, "abcdef");
+  bzero(one+2, 0);
+  equal(one, "abcdef", 4);		/* Zero-length copy. */
+
+#if 0
+  /* bcmp - somewhat like memcmp.  */
+  it = "bcmp";
+  check(bcmp("a", "a", 1) == 0, 1);	/* Identity. */
+  check(bcmp("abc", "abc", 3) == 0, 2);	/* Multicharacter. */
+  check(bcmp("abcd", "abce", 4) != 0, 3);	/* Honestly unequal. */
+  check(bcmp("abce", "abcd", 4) != 0, 4);
+  check(bcmp("alph", "beta", 4) != 0, 5);
+  check(bcmp("abce", "abcd", 3) == 0, 6);	/* Count limited. */
+  check(bcmp("abc", "def", 0) == 0, 8);	/* Zero count. */
+#endif
+
+  {
+    char text[] = "This,is,a,test";
+    char *list = text;
+    it = "strsep";
+    check (!strcmp ("This", strsep (&list, ",")), 1);
+    check (!strcmp ("is", strsep (&list, ",")), 2);
+    check (!strcmp ("a", strsep (&list, ",")), 3);
+    check (!strcmp ("test", strsep (&list, ",")), 4);
+    check (strsep (&list, ",") == NULL, 5);
+  }
+
+  /* strerror - VERY system-dependent.  */
+  {
+    int f;
+    it = "strerror";
+    f = __open("/", O_WRONLY);	/* Should always fail. */
+    check(f < 0 && errno > 0 && errno < _sys_nerr, 1);
+    equal(strerror(errno), _sys_errlist[errno], 2);
+  }
+
+  {
+    int status;
+    if (errors == 0)
+      {
+	status = EXIT_SUCCESS;
+	puts("No errors.");
+      }
+    else
+      {
+	status = EXIT_FAILURE;
+	printf("%Z errors.\n", errors);
+      }
+    exit(status);
+  }
+}