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Report errno on file opening failures and I/O errors

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Add the underlying operating system error (usually "No such file" or
"Out of space" respectively, but highly informative when it is not)
to these error messages.
This commit is contained in:
John Marshall
2019-07-17 11:43:54 +01:00
committed by Heng Li
parent 238b6bb3ea
commit 20c104ce8d
4 changed files with 12 additions and 9 deletions
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6
misc.c
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@@ -125,7 +125,7 @@ void mm_err_puts(const char *str)
int ret;
ret = puts(str);
if (ret == EOF) {
fprintf(stderr, "[ERROR] failed to write the results\n");
perror("[ERROR] failed to write the results");
exit(EXIT_FAILURE);
}
}
@@ -135,7 +135,7 @@ void mm_err_fwrite(const void *p, size_t size, size_t nitems, FILE *fp)
int ret;
ret = fwrite(p, size, nitems, fp);
if (ret == EOF) {
fprintf(stderr, "[ERROR] failed to write data\n");
perror("[ERROR] failed to write data");
exit(EXIT_FAILURE);
}
}
@@ -145,7 +145,7 @@ void mm_err_fread(void *p, size_t size, size_t nitems, FILE *fp)
int ret;
ret = fread(p, size, nitems, fp);
if (ret == EOF) {
fprintf(stderr, "[ERROR] failed to read data\n");
perror("[ERROR] failed to read data");
exit(EXIT_FAILURE);
}
}