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master
stdio-common/bug5.c
77 строк
2 KB
Adhemerval Zanella
stdio: Suppress %Z format for clang
22 дек 2024, 12:29
22 дек 2024, 12:29
77c1128
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/* If stdio is working correctly, after this is run infile and outfile will have the same contents. If the bug (found in GNU C library 0.3) exhibits itself, outfile will be missing the 2nd through 1023rd characters. */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <libc-diag.h> #include <support/support.h> static char buf[8192]; int main (void) { FILE *in; FILE *out; static char inname[] = OBJPFX "bug5test.in"; static char outname[] = OBJPFX "bug5test.out"; char *printbuf; size_t i; int result; /* Create a test file. */ in = fopen (inname, "w+"); if (in == NULL) { perror (inname); return 1; } for (i = 0; i < 1000; ++i) /* clang do not handle %Z format. */ DIAG_PUSH_NEEDS_COMMENT_CLANG; DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wformat-invalid-specifier"); DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wformat-extra-args"); fprintf (in, "%Zu\n", i); DIAG_POP_NEEDS_COMMENT_CLANG; out = fopen (outname, "w"); if (out == NULL) { perror (outname); return 1; } if (fseek (in, 0L, SEEK_SET) != 0) abort (); putc (getc (in), out); i = fread (buf, 1, sizeof (buf), in); if (i == 0) { perror ("fread"); return 1; } if (fwrite (buf, 1, i, out) != i) { perror ("fwrite"); return 1; } fclose (in); fclose (out); puts ("There should be no further output from this test."); fflush (stdout); /* We must remove this entry to assure the `cmp' binary does not use the perhaps incompatible new shared libraries. */ unsetenv ("LD_LIBRARY_PATH"); printbuf = xasprintf ("cmp %s %s", inname, outname); result = system (printbuf); remove (inname); remove (outname); exit ((result != 0)); }