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5c112f1b62
Various glibc testcases use tmpnam in ways subject to race conditions (generate a temporary file name, then later open that file without O_EXCL). This patch fixes those tests to use mkstemp - generally a minimal local fix to use mkstemp instead of tmpnam, rather than a larger fix to use other testsuite infrastructure for temporary files. The unchanged use of tmpnam in posix/wordexp-test.c would fail safe in the event of a race (it's generating a name for use with mkdir rather than for a file to be opened for writing). Tested for x86_64. * grp/tst_fgetgrent.c: Include <unistd.h>. (main): Use mkstemp instead of tmpnam. * io/test-utime.c (main): Likewise. * posix/annexc.c (macrofile): Change to modifiable array. (get_null_defines): Use mkstemp instead of tmpnam. Do not remove macrofile here. * posix/bug-getopt1.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * posix/bug-getopt2.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * posix/bug-getopt3.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * posix/bug-getopt4.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * posix/bug-getopt5.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * stdio-common/bug7.c: Include <stdlib.h> and <unistd.h>. (main): Use mkstemp instead of tmpnam. * stdio-common/tst-fdopen.c: Include <stdlib.h>. (main): Use mkstemp instead of tmpnam. * stdio-common/tst-ungetc.c: Include <stdlib.h>. (main): use mkstemp instead of tmpnam. * stdlib/isomac.c (macrofile): Change to modifiable array. (get_null_defines): Use mkstemp instead of tmpnam. Do not remove macrofile here.
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/* Test for fdopen bugs. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#undef assert
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#define assert(x) \
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if (!(x)) \
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{ \
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fputs ("test failed: " #x "\n", stderr); \
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retval = 1; \
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goto the_end; \
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}
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char buffer[256];
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int
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main (int argc, char *argv[])
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{
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char name[] = "/tmp/tst-fdopen.XXXXXX";
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FILE *fp = NULL;
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int retval = 0;
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int fd;
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fd = mkstemp (name);
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if (fd == -1)
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{
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printf ("mkstemp failed: %m\n");
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return 1;
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}
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close (fd);
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fp = fopen (name, "w");
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assert (fp != NULL)
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fputs ("foobar and baz", fp);
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fclose (fp);
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fp = NULL;
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fd = open (name, O_RDONLY);
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assert (fd != -1);
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assert (lseek (fd, 5, SEEK_SET) == 5);
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/* The file position indicator associated with the new stream is set to
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the position indicated by the file offset associated with the file
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descriptor. */
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fp = fdopen (fd, "r");
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assert (fp != NULL);
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assert (getc (fp) == 'r');
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assert (getc (fp) == ' ');
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the_end:
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if (fp != NULL)
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fclose (fp);
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unlink (name);
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return retval;
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}
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