diff options
Diffstat (limited to 'nss/nss_files/files-alias.c')
| -rw-r--r-- | nss/nss_files/files-alias.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/nss/nss_files/files-alias.c b/nss/nss_files/files-alias.c index b18361f66c..b9bba9cb8f 100644 --- a/nss/nss_files/files-alias.c +++ b/nss/nss_files/files-alias.c @@ -1,5 +1,5 @@ /* Mail alias file parser in nss_files module. - Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. @@ -148,10 +148,15 @@ get_next_alias (const char *match, struct aliasent *result, size_t room_left = buflen - (buflen % __alignof__ (char *)); char *line; + /* Check whether the buffer is large enough for even trying to + read something. */ + if (room_left < 2) + goto no_more_room; + /* Read the first line. It must contain the alias name and possibly some alias names. */ first_unused[room_left - 1] = '\xff'; - line = fgets (first_unused, room_left, stream); + line = fgets_unlocked (first_unused, room_left, stream); if (line == NULL) /* Nothing to read. */ break; @@ -245,7 +250,8 @@ get_next_alias (const char *match, struct aliasent *result, while (! feof (listfile)) { first_unused[room_left - 1] = '\xff'; - line = fgets (first_unused, room_left, listfile); + line = fgets_unlocked (first_unused, room_left, + listfile); if (line == NULL) break; if (first_unused[room_left - 1] != '\xff') @@ -345,7 +351,7 @@ get_next_alias (const char *match, struct aliasent *result, /* The just read character is a white space and so can be ignored. */ first_unused[room_left - 1] = '\xff'; - line = fgets (first_unused, room_left, stream); + line = fgets_unlocked (first_unused, room_left, stream); if (first_unused[room_left - 1] != '\xff') goto no_more_room; cp = strpbrk (line, "#\n"); |