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glibc/libio/bug-fopena+.c
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#include <fcntl.h> | |
#include <stdio.h> | |
#include <string.h> | |
#include <unistd.h> | |
static int fd; | |
static char *fname; | |
static void prepare (void); | |
#define PREPARE(argc, argv) prepare () | |
#define TEST_FUNCTION do_test () | |
static int do_test (void); | |
#include "../test-skeleton.c" | |
static void | |
prepare (void) | |
{ | |
fd = create_temp_file ("wrewind.", &fname); | |
if (fd == -1) | |
exit (3); | |
} | |
static int | |
do_test (void) | |
{ | |
char buf[100]; | |
FILE *fp; | |
int result = 0; | |
fp = fdopen (fd, "w"); | |
if (fp == NULL) | |
{ | |
puts ("cannot create file"); | |
exit (1); | |
} | |
if (fputs ("one\n", fp) == EOF || fputs ("two\n", fp) == EOF) | |
{ | |
puts ("cannot create filec content"); | |
exit (1); | |
} | |
fclose (fp); | |
fp = fopen (fname, "a+"); | |
if (fp == NULL) | |
{ | |
puts ("cannot fopen a+"); | |
exit (1); | |
} | |
if (fgets (buf, sizeof (buf), fp) == NULL) | |
{ | |
puts ("cannot read after fopen a+"); | |
exit (1); | |
} | |
if (strcmp (buf, "one\n") != 0) | |
{ | |
puts ("read after fopen a+ produced wrong result"); | |
result = 1; | |
} | |
fclose (fp); | |
fd = open (fname, O_RDWR); | |
if (fd == -1) | |
{ | |
puts ("open failed"); | |
exit (1); | |
} | |
fp = fdopen (fd, "a+"); | |
if (fp == NULL) | |
{ | |
puts ("fopen after open failed"); | |
exit (1); | |
} | |
if (fgets (buf, sizeof (buf), fp) == NULL) | |
{ | |
puts ("cannot read after fdopen a+"); | |
exit (1); | |
} | |
if (strcmp (buf, "one\n") != 0) | |
{ | |
puts ("read after fdopen a+ produced wrong result"); | |
result = 1; | |
} | |
fclose (fp); | |
return result; | |
} |