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stdio-common/bug7.c
77 строк
1 KB
Joseph Myers
Avoid insecure usage of tmpnam in tests.
19 июл 2018, 00:04
19 июл 2018, 00:04
5c112f1
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/* Regression test for fseek and freopen bugs. */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> int main (int argc, char *argv[]) { int lose = 0; char filename[] = "/tmp/bug7.XXXXXX"; FILE *fp; int fd = mkstemp (filename); if (fd == -1) { printf ("mkstemp failed\n"); lose = 1; } else { close (fd); fp = fopen (filename, "w+"); fprintf (fp, "Hello world!\n"); fflush (fp); fseek (fp, 5L, SEEK_SET); if (fseek (fp, -1L, SEEK_CUR) < 0) { printf ("seek failed\n"); lose = 1; } fclose (fp); remove (filename); } { FILE *file1; FILE *file2; char filename1[] = "/tmp/bug7.XXXXXX"; char filename2[] = "/tmp/bug7.XXXXXX"; int ch; int fd1 = mkstemp (filename1); int fd2 = mkstemp (filename2); if (fd1 == -1 || fd2 == -1) { printf ("mkstemp failed\n"); lose = 1; } else { close (fd1); close (fd2); file1 = fopen (filename1, "w"); fclose (file1); file2 = fopen (filename2, "w"); fputc ('x', file2); fclose (file2); file1 = fopen (filename1, "r"); file2 = freopen (filename2, "r", file1); if ((ch = fgetc (file2)) != 'x') { printf ("wrong character in reopened file, value = %d\n", ch); lose = 1; } fclose (file2); remove (filename1); remove (filename2); } } puts (lose ? "Test FAILED!" : "Test succeeded."); return lose; }