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authorEric Andersen <andersen@codepoet.org>2003-10-10 07:34:27 +0000
committerEric Andersen <andersen@codepoet.org>2003-10-10 07:34:27 +0000
commit56104838733c81ba410ac41f767ac72267049489 (patch)
tree54057d78cdae893235b86787a735629396d857a5 /libc/pwd_grp/__getpwent_r.c
parent61011662018fa98c4610c1ae826e417678cd5c80 (diff)
Implement getgrgid_r and getgrnam_r. Rework group handling code to be fully
reentrant, since there was still a shared static value. indent stuff,
Diffstat (limited to 'libc/pwd_grp/__getpwent_r.c')
-rw-r--r--libc/pwd_grp/__getpwent_r.c77
1 files changed, 38 insertions, 39 deletions
diff --git a/libc/pwd_grp/__getpwent_r.c b/libc/pwd_grp/__getpwent_r.c
index 5cfdd89ba..6e6de4038 100644
--- a/libc/pwd_grp/__getpwent_r.c
+++ b/libc/pwd_grp/__getpwent_r.c
@@ -1,7 +1,8 @@
+/* vi: set sw=4 ts=4: */
/*
* __getpwent_r.c - This file is part of the libc-8086/pwd package for ELKS,
* Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
- * Copyright (C) 2001 Erik Andersen <andersee@debian.org>
+ * Copyright (C) 2001-2003 Erik Andersen <andersee@debian.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@@ -18,6 +19,7 @@
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* March 7, 2001 -- Reworked to be reentrant by Erik Andersen
+ * Oct 9, 2003 -- Reworked again by Erik Andersen to be fully reentrant
*/
#include <stdlib.h>
@@ -36,38 +38,35 @@
int __getpwent_r(struct passwd * passwd, char * line_buff, size_t buflen, int pwd_fd)
{
- char *field_begin;
- char *endptr;
+ char *endptr, *field_begin;
char *gid_ptr=NULL;
char *uid_ptr=NULL;
- int line_len;
- int i;
+ int i, line_len;
- if (buflen<PWD_BUFFER_SIZE)
+ if (buflen<PWD_BUFFER_SIZE) {
return ERANGE;
+ }
/* We use the restart label to handle malformatted lines */
restart:
- /* Read the passwd line into the static buffer using a minimum of
- syscalls. */
- if ((line_len = read(pwd_fd, line_buff, buflen)) <= 0)
+ /* Read the passwd line into the buffer for processing */
+ if ((line_len = read(pwd_fd, line_buff, buflen)) <= 0) {
return EIO;
+ }
field_begin = strchr(line_buff, '\n');
if (field_begin != NULL)
- lseek(pwd_fd, (long) (1 + field_begin - (line_buff + line_len)),
- SEEK_CUR);
- else { /* The line is too long - skip it. :-\ */
-
+ lseek(pwd_fd, (long) (1 + field_begin - (line_buff + line_len)), SEEK_CUR);
+ else {
+ /* The line is too long - skip it. :-\ */
do {
- if ((line_len = read(pwd_fd, line_buff, buflen)) <= 0)
+ if ((line_len = read(pwd_fd, line_buff, buflen)) <= 0) {
return EIO;
+ }
} while (!(field_begin = strchr(line_buff, '\n')));
- lseek(pwd_fd, (long) (field_begin - line_buff) - line_len + 1,
- SEEK_CUR);
+ lseek(pwd_fd, (long) (field_begin - line_buff) - line_len + 1, SEEK_CUR);
goto restart;
}
- if (*line_buff == '#' || *line_buff == ' ' || *line_buff == '\n' ||
- *line_buff == '\t')
+ if (*line_buff == '#' || *line_buff == ' ' || *line_buff == '\n' || *line_buff == '\t')
goto restart;
*field_begin = '\0';
@@ -75,27 +74,27 @@ restart:
field_begin = line_buff;
for (i = 0; i < 7; i++) {
switch (i) {
- case 0:
- passwd->pw_name = field_begin;
- break;
- case 1:
- passwd->pw_passwd = field_begin;
- break;
- case 2:
- uid_ptr = field_begin;
- break;
- case 3:
- gid_ptr = field_begin;
- break;
- case 4:
- passwd->pw_gecos = field_begin;
- break;
- case 5:
- passwd->pw_dir = field_begin;
- break;
- case 6:
- passwd->pw_shell = field_begin;
- break;
+ case 0:
+ passwd->pw_name = field_begin;
+ break;
+ case 1:
+ passwd->pw_passwd = field_begin;
+ break;
+ case 2:
+ uid_ptr = field_begin;
+ break;
+ case 3:
+ gid_ptr = field_begin;
+ break;
+ case 4:
+ passwd->pw_gecos = field_begin;
+ break;
+ case 5:
+ passwd->pw_dir = field_begin;
+ break;
+ case 6:
+ passwd->pw_shell = field_begin;
+ break;
}
if (i < 6) {
field_begin = strchr(field_begin, ':');