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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 09:04:02 -04:00
committed by Heng Li
parent 238b6bb3ea
commit 20c104ce8d
4 changed files with 12 additions and 9 deletions
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splitidx.c
+3 -2
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@@ -2,6 +2,7 @@
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include "mmpriv.h"
FILE *mm_split_init(const char *prefix, const mm_idx_t *mi)
@@ -13,7 +14,7 @@ FILE *mm_split_init(const char *prefix, const mm_idx_t *mi)
sprintf(fn, "%s.%.4d.tmp", prefix, mi->index);
if ((fp = fopen(fn, "wb")) == NULL) {
if (mm_verbose >= 1)
fprintf(stderr, "[ERROR]\033[1;31m failed to write to temporary file '%s'\033[0m\n", fn);
fprintf(stderr, "[ERROR]\033[1;31m failed to write to temporary file '%s'\033[0m: %s\n", fn, strerror(errno));
exit(1);
}
mm_err_fwrite(&k, 4, 1, fp);
@@ -41,7 +42,7 @@ mm_idx_t *mm_split_merge_prep(const char *prefix, int n_splits, FILE **fp, uint3
sprintf(fn, "%s.%.4d.tmp", prefix, i);
if ((fp[i] = fopen(fn, "rb")) == 0) {
if (mm_verbose >= 1)
fprintf(stderr, "ERROR: failed to open temporary file '%s'\n", fn);
fprintf(stderr, "ERROR: failed to open temporary file '%s': %s\n", fn, strerror(errno));
for (j = 0; j < i; ++j)
fclose(fp[j]);
free(fn);