Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.c-torture/execute/fprintf-2.c @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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/* Verify that calls to fprintf don't get eliminated even if their result on success can be computed at compile time (they can fail). The calls can still be transformed into those of other functions. { dg-prune-output "warning: warning: \[^\n\r\]* possibly used unsafely" } { dg-skip-if "requires io" { avr-*-* } } { dg-skip-if "requires io" { freestanding } } */ #include <stdio.h> #include <stdlib.h> #include <string.h> int main (void) { char *tmpfname = tmpnam (0); FILE *f = fopen (tmpfname, "w"); if (!f) { perror ("fopen for writing"); return 1; } fprintf (f, "1"); fprintf (f, "%c", '2'); fprintf (f, "%c%c", '3', '4'); fprintf (f, "%s", "5"); fprintf (f, "%s%s", "6", "7"); fprintf (f, "%i", 8); fprintf (f, "%.1s\n", "9x"); fclose (f); f = fopen (tmpfname, "r"); if (!f) { perror ("fopen for reading"); remove (tmpfname); return 1; } char buf[12] = ""; if (1 != fscanf (f, "%s", buf)) { perror ("fscanf"); fclose (f); remove (tmpfname); return 1; } fclose (f); remove (tmpfname); if (strcmp (buf, "123456789")) abort (); return 0; }