1 files changed, 77 insertions, 26 deletions

diff --git a/src/regress/lib/libc/fmemopen/fmemopentest.c b/src/regress/lib/libc/fmemopen/fmemopentest.c
index 203c93be65..dd0c123fe6 100644
--- a/src/regress/lib/libc/fmemopen/fmemopentest.c
+++ b/src/regress/lib/libc/fmemopen/fmemopentest.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: fmemopentest.c,v 1.3 2013/03/28 09:35:58 mpi Exp $ */
+/*      $OpenBSD: fmemopentest.c,v 1.4 2020/08/17 16:17:39 millert Exp $ */
 
 /*
  * Copyright (c) 2011 Martin Pieuchot <mpi@openbsd.org>
@@ -70,7 +70,7 @@ simpletest(void)
 }
 
 int
-updatetest(void)
+appendtest(const char *mode)
 {
         FILE    *s1;
         char     string[] = "hello\0 test number 2";
@@ -78,35 +78,44 @@ updatetest(void)
         size_t   len;
         int      failures = 0;
 
-        s1 = fmemopen(string, 19, "a+");
+        s1 = fmemopen(string, 19, mode);
         if (s1 == NULL)
                 return (1);
 
+        fseek(s1, 0, SEEK_SET);
+        if (ftell(s1) != 0) {
+                warnx("failed seek test [%s] (4)", mode);
+                failures++;
+        }
+
+        /* write should append even though seek position is 0 */
         len = fwrite(" world", 1, 6, s1);
         if (len != 6) {
-                warnx("failed write test (4)");
+                warnx("failed write test [%s] (5)", mode);
                 failures++;
         }
 
-        fseek(s1, 0, SEEK_SET);
-        if (ftell(s1) != 0) {
-                warnx("failed seek test (5)");
+        if (ftell(s1) != strlen("hello world")) {
+                warnx("failed seek test [%s] (6)", mode);
                 failures++;
         }
 
-        len = fread(buffer, 1, sizeof(buffer) - 1, s1);
-        if (strncmp(string, buffer, len)) {
-                warnx("failed compare test (6)");
-                failures++;
+        if (mode[1] == '+') {
+                fseek(s1, 0, SEEK_SET);
+                len = fread(buffer, 1, sizeof(buffer) - 1, s1);
+                if (len == 0 || strncmp(string, buffer, len)) {
+                        warnx("failed compare test [%s] (7)", mode);
+                        failures++;
+                }
         }
 
         if (strcmp(string, "hello world")) {
-                warnx("failed compare test (7)");
+                warnx("failed compare test [%s] (8)", mode);
                 failures++;
         }
 
         if (strcmp(string + strlen(string) + 1, "number 2")) {
-                warnx("failed compare test (8)");
+                warnx("failed compare test [%s] (9)", mode);
                 failures++;
         }
 
@@ -114,7 +123,46 @@ updatetest(void)
 }
 
 int
-writetest(void)
+updatetest(void)
+{
+        FILE    *s1;
+        char     string[] = "bah, what a day";
+        char     buffer[256];
+        size_t   len;
+        int      failures = 0;
+
+        s1 = fmemopen(string, 19, "r+");
+        if (s1 == NULL)
+                return (1);
+
+        if (ftell(s1) != 0) {
+                warnx("failed seek test (10)");
+                failures++;
+        }
+
+        len = fwrite("oh frabjous", 1, 11, s1);
+        if (len != 11) {
+                warnx("failed write test (11)");
+                failures++;
+        }
+
+        fseek(s1, 0, SEEK_SET);
+        len = fread(buffer, 1, sizeof(buffer) - 1, s1);
+        if (len == 0 || strncmp(string, buffer, len)) {
+                warnx("failed compare test (12)");
+                failures++;
+        }
+
+        if (strcmp(string, "oh frabjous day")) {
+                warnx("failed compare test (13)");
+                failures++;
+        }
+
+        return (failures);
+}
+
+int
+writetest(const char *mode)
 {
         FILE    *s1;
         char     string[] = "super test number 3";
@@ -124,36 +172,36 @@ writetest(void)
 
         slen = strlen(string) + 1;
 
-        s1 = fmemopen(string, slen, "w");
+        s1 = fmemopen(string, slen, mode);
         if (s1 == NULL)
                 return (1);
 
         len = fwrite("short", 1, 5, s1);
         if (len != strlen("short")) {
-                warnx("failed write test (9)");
+                warnx("failed write test [%s] (14)", mode);
                 failures++;
         }
         fclose(s1);
 
         s1 = fmemopen(string, slen, "r");
         if (s1 == NULL) {
-                warnx("failed open test (10)");
+                warnx("failed open test [%s] (15)", mode);
                 failures++;
         }
 
         len = fread(buffer, 1, sizeof(buffer) - 1, s1);
-        if (strncmp(string, buffer, len)) {
-                warnx("failed compare test (11)");
+        if (len == 0 || strncmp(string, buffer, len)) {
+                warnx("failed compare test [%s] (16)", mode);
                 failures++;
         }
 
         if (strcmp(string, "short")) {
-                warnx("failed compare test (12)");
+                warnx("failed compare test [%s] (17)", mode);
                 failures++;
         }
 
         if (strcmp(string + strlen(string) + 1, "test number 3")) {
-                warnx("failed compare test (13)");
+                warnx("failed compare test [%s] (18)", mode);
                 failures++;
         }
 
@@ -175,23 +223,23 @@ seektest(void)
                 return (1);
 
         if (fseek(s1, 8, SEEK_SET) != 0) {
-                warnx("failed to fseek. (14)");
+                warnx("failed to fseek. (19)");
                 failures++;
         }
 
         if (ftell(s1) != 8) {
-                warnx("failed seek test. (15)");
+                warnx("failed seek test. (20)");
                 failures++;
         }
 
         /* Try to seek backward */
         if (fseek(s1, -1, SEEK_CUR) != 0) {
-                warnx("failed to fseek. (16)");
+                warnx("failed to fseek. (21)");
                 failures++;
         }
 
         if (ftell(s1) != 7) {
-                warnx("failed seeking backward. (17)");
+                warnx("failed seeking backward. (22)");
                 failures++;
         }
 
@@ -204,8 +252,11 @@ main(void)
         int      failures = 0;
 
         failures += simpletest();
+        failures += appendtest("a");
+        failures += appendtest("a+");
         failures += updatetest();
-        failures += writetest();
+        failures += writetest("w");
+        failures += writetest("w+");
         failures += seektest();
 
         return (failures);