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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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main.c
+4 -3
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@@ -1,6 +1,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "bseq.h"
#include "minimap.h"
#include "mmpriv.h"
@@ -172,7 +173,7 @@ int main(int argc, char *argv[])
else if (c == 'o') {
if (strcmp(o.arg, "-") != 0) {
if (freopen(o.arg, "wb", stdout) == NULL) {
fprintf(stderr, "[ERROR]\033[1;31m failed to write the output to file '%s'\033[0m\n", o.arg);
fprintf(stderr, "[ERROR]\033[1;31m failed to write the output to file '%s'\033[0m: %s\n", o.arg, strerror(errno));
exit(1);
}
}
@@ -337,7 +338,7 @@ int main(int argc, char *argv[])
}
idx_rdr = mm_idx_reader_open(argv[o.ind], &ipt, fnw);
if (idx_rdr == 0) {
fprintf(stderr, "[ERROR] failed to open file '%s'\n", argv[o.ind]);
fprintf(stderr, "[ERROR] failed to open file '%s': %s\n", argv[o.ind], strerror(errno));
return 1;
}
if (!idx_rdr->is_idx && fnw == 0 && argc - o.ind < 2) {
@@ -384,7 +385,7 @@ int main(int argc, char *argv[])
mm_split_merge(argc - (o.ind + 1), (const char**)&argv[o.ind + 1], &opt, n_parts);
if (fflush(stdout) == EOF) {
fprintf(stderr, "[ERROR] failed to write the results\n");
perror("[ERROR] failed to write the results");
exit(EXIT_FAILURE);
}