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Use die_errno() instead of die() when checking syscalls

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Lots of die() calls did not actually report the kind of error, which
can leave the user confused as to the real problem.  Use die_errno()
where we check a system/library call that sets errno on failure, or
one of the following that wrap such calls:

  Function              Passes on error from
  --------              --------------------
  odb_pack_keep         open
  read_ancestry         fopen
  read_in_full          xread
  strbuf_read           xread
  strbuf_read_file      open or strbuf_read_file
  strbuf_readlink       readlink
  write_in_full         xwrite

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Thomas Rast
2009-06-27 17:58:47 +02:00
committed by Junio C Hamano
parent d824cbba02
commit 0721c314a5
30 changed files with 79 additions and 74 deletions
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6
diff.c
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@ -1982,7 +1982,7 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
size = buf.len;
}
if (write_in_full(fd, blob, size) != size)
die("unable to write temp-file");
die_errno("unable to write temp-file");
close(fd);
temp->name = temp->tmp_path;
strcpy(temp->hex, sha1_to_hex(sha1));
@ -2026,7 +2026,7 @@ static struct diff_tempfile *prepare_temp_file(const char *name,
if (S_ISLNK(st.st_mode)) {
struct strbuf sb = STRBUF_INIT;
if (strbuf_readlink(&sb, name, st.st_size) < 0)
die("readlink(%s)", name);
die_errno("readlink(%s)", name);
prep_temp_blob(name, temp, sb.buf, sb.len,
(one->sha1_valid ?
one->sha1 : null_sha1),
@ -2219,7 +2219,7 @@ static void diff_fill_sha1_info(struct diff_filespec *one)
return;
}
if (lstat(one->path, &st) < 0)
die("stat %s", one->path);
die_errno("stat '%s'", one->path);
if (index_path(one->sha1, one->path, &st, 0))
die("cannot hash %s", one->path);
}