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116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
/* rename-test.c
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**
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**
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** A simple test of the rename function.
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**
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** 2008-10-06, Greg King
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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static FILE* file;
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static int r;
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static char name1[16], name2[16];
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int main(void)
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{
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/* Generate two temporary file-names that have a random, unused spelling. */
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_randomize();
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for (;;) {
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r = rand();
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sprintf(name1, "r%04.4u.1", (unsigned)r);
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sprintf(name2, "r%04.4u.2", (unsigned)r);
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/* Ensure that neither file-name exists. */
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errno = 0;
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file = fopen(name1, "r");
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if (file != NULL) {
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fclose(file);
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continue; /* try a different spelling */
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}
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/* Make sure that fopen() failed for the right reason. */
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if (errno != ENOENT) {
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perror("Disk error with first name");
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return EXIT_FAILURE;
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}
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errno = 0;
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file = fopen(name2, "r");
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if (file != NULL) {
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fclose(file);
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continue;
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}
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if (errno != ENOENT) {
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perror("Disk error with second name");
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return EXIT_FAILURE;
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}
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break; /* neither one exists; do next step */
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}
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/* Create the first file.
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** Close it without writing anything because only its name is important.
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*/
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printf("Creating file: %s\n", name1);
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file = fopen(name1, "w");
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if (file == NULL) {
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_poserror("Disk error making first file");
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return EXIT_FAILURE;
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}
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fclose(file);
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/* Verify that the file-name exists now. */
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file = fopen(name1, "r");
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if (file == NULL) {
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_poserror("Cannot find first name");
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return EXIT_FAILURE;
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}
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fclose(file);
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/* Whew! Finally, we get to the reason why this program exists:
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** Confirm that the first file-name can be changed into the second
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** file-name.
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*/
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printf("Renaming %s to %s\n", name1, name2);
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r = rename(name1, name2);
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if (r < 0) {
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_poserror("rename() failed");
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return EXIT_FAILURE;
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}
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/* Verify that the first file-name no longer exists. */
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file = fopen(name1, "r");
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if (file != NULL) {
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fclose(file);
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_poserror("First name still exists");
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return EXIT_FAILURE;
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}
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/* Verify that the second file-name exists now. */
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file = fopen(name2, "r");
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if (file == NULL) {
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_poserror("Cannot find second name");
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return EXIT_FAILURE;
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}
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fclose(file);
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printf("Success!\n");
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/* Delete the second (temporary) name. */
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printf("Removing %s\n", name2);
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r = remove(name2);
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if (r < 0) {
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_poserror("remove() failed");
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return EXIT_FAILURE;
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}
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printf("rename() passed the test.\n");
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return EXIT_SUCCESS;
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}
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