35   FILE* fp = fopen("/proc/version", "r");  in TEST()  local
38   ASSERT_EQ(0U, __fbufsize(fp));  in TEST()
42   fgets(buf, sizeof(buf), fp);  in TEST()
43   ASSERT_EQ(1024U, __fbufsize(fp));  in TEST()
45   ASSERT_EQ(0, setvbuf(fp, buf, _IOFBF, 1));  in TEST()
46   ASSERT_EQ(1U, __fbufsize(fp));  in TEST()
48   ASSERT_EQ(0, setvbuf(fp, buf, _IOFBF, 8));  in TEST()
49   ASSERT_EQ(8U, __fbufsize(fp));  in TEST()
51   fclose(fp);  in TEST()
55   FILE* fp = fopen("/proc/version", "r");  in TEST()  local
57   ASSERT_FALSE(__flbf(fp));  in TEST()
60   ASSERT_EQ(0, setvbuf(fp, buf, _IOLBF, sizeof(buf)));  in TEST()
62   ASSERT_TRUE(__flbf(fp));  in TEST()
64   fclose(fp);  in TEST()
68   FILE* fp = fopen("/dev/null", "w");  in TEST()  local
69   ASSERT_EQ(0U, __fpending(fp));  in TEST()
70   ASSERT_EQ('x', fputc('x', fp));  in TEST()
71   ASSERT_EQ(1U, __fpending(fp));  in TEST()
72   ASSERT_EQ('y', fputc('y', fp));  in TEST()
73   ASSERT_EQ(2U, __fpending(fp));  in TEST()
74   fflush(fp);  in TEST()
75   ASSERT_EQ(0U, __fpending(fp));  in TEST()
76   fclose(fp);  in TEST()
80   FILE* fp = tmpfile();  in TEST()  local
82   ASSERT_EQ('a', fputc('a', fp));  in TEST()
83   ASSERT_EQ(1U, __fpending(fp));  in TEST()
84   __fpurge(fp);  in TEST()
85   ASSERT_EQ(0U, __fpending(fp));  in TEST()
87   ASSERT_EQ('b', fputc('b', fp));  in TEST()
88   ASSERT_EQ('\n', fputc('\n', fp));  in TEST()
89   ASSERT_EQ(2U, __fpending(fp));  in TEST()
91   rewind(fp);  in TEST()
94   char* s = fgets(buf, sizeof(buf), fp);  in TEST()
98   fclose(fp);  in TEST()
102   FILE* fp = fopen("/dev/null", "w");  in TEST()  local
105   ASSERT_EQ(0, setvbuf(fp, buf, _IOLBF, sizeof(buf)));  in TEST()
107   ASSERT_EQ('a', fputc('a', fp));  in TEST()
108   ASSERT_EQ(1U, __fpending(fp));  in TEST()
112   ASSERT_EQ(0U, __fpending(fp));  in TEST()
114   fclose(fp);  in TEST()
118   FILE* fp = fopen("/dev/null", "r");  in TEST()  local
119   ASSERT_TRUE(__freadable(fp));  in TEST()
120   ASSERT_FALSE(__fwritable(fp));  in TEST()
121   fclose(fp);  in TEST()
123   fp = fopen("/dev/null", "w");  in TEST()
124   ASSERT_FALSE(__freadable(fp));  in TEST()
125   ASSERT_TRUE(__fwritable(fp));  in TEST()
126   fclose(fp);  in TEST()
128   fp = fopen("/dev/null", "w+");  in TEST()
129   ASSERT_TRUE(__freadable(fp));  in TEST()
130   ASSERT_TRUE(__fwritable(fp));  in TEST()
131   fclose(fp);  in TEST()
135   FILE* fp = fopen("/proc/version", "r");  in TEST()  local
136   ASSERT_EQ(FSETLOCKING_INTERNAL, __fsetlocking(fp, FSETLOCKING_QUERY));  in TEST()
137   ASSERT_EQ(FSETLOCKING_INTERNAL, __fsetlocking(fp, FSETLOCKING_BYCALLER));  in TEST()
138   ASSERT_EQ(FSETLOCKING_BYCALLER, __fsetlocking(fp, FSETLOCKING_QUERY));  in TEST()
139   ASSERT_EQ(FSETLOCKING_BYCALLER, __fsetlocking(fp, FSETLOCKING_INTERNAL));  in TEST()
140   ASSERT_EQ(FSETLOCKING_INTERNAL, __fsetlocking(fp, FSETLOCKING_QUERY));  in TEST()
141   fclose(fp);  in TEST()