libpwdgrp: make it coexist with <pwd.h>, <grp.h> and <shadow.h>.

 allows to get rid of hacks in libbb.h (extra declaration of setgroups -
 now it comes from grp.h as intended).

5 files changed, 42 insertions, 74 deletions

diff --git a/include/grp_.h b/include/grp_.h
index 23c4dcc03..697a78606 100644
--- a/include/grp_.h
+++ b/include/grp_.h
@@ -21,21 +21,17 @@
  *      POSIX Standard: 9.2.1 Group Database Access     <grp.h>
  */
 
-#ifndef _GRP_H
-#define _GRP_H 1
+#ifndef BB_GRP_H
+#define BB_GRP_H 1
 
 #if __GNUC_PREREQ(4,1)
 # pragma GCC visibility push(hidden)
 #endif
 
-/* The group structure.  */
-struct group {
-        char *gr_name;          /* Group name.  */
-        char *gr_passwd;        /* Password.    */
-        gid_t gr_gid;           /* Group ID.    */
-        char **gr_mem;          /* Member list. */
-};
-
+/* This file is #included after #include <grp.h>
+ * We will use libc-defined structures, but will #define finction names
+ * so that function calls are directed to bb_internal_XXX replacements
+ */
 
 #define setgrent     bb_internal_setgrent
 #define endgrent     bb_internal_endgrent
@@ -53,9 +49,7 @@ struct group {
 
 
 /* All function names below should be remapped by #defines above
- * in order to not collide with libc names.
- * In theory it isn't necessary, but I saw weird interactions at link time.
- * Let's play safe */
+ * in order to not collide with libc names. */
 
 
 /* Rewind the group-file stream.  */
@@ -71,14 +65,14 @@ extern struct group *getgrent(void);
 extern struct group *fgetgrent(FILE *__stream);
 
 /* Write the given entry onto the given stream.  */
-extern int putgrent(__const struct group *__restrict __p,
+extern int putgrent(const struct group *__restrict __p,
                      FILE *__restrict __f);
 
 /* Search for an entry with a matching group ID.  */
 extern struct group *getgrgid(gid_t __gid);
 
 /* Search for an entry with a matching group name.  */
-extern struct group *getgrnam(__const char *__name);
+extern struct group *getgrnam(const char *__name);
 
 /* Reentrant versions of some of the functions above.
 
@@ -98,7 +92,7 @@ extern int getgrgid_r(gid_t __gid, struct group *__restrict __resultbuf,
                        struct group **__restrict __result);
 
 /* Search for an entry with a matching group name.  */
-extern int getgrnam_r(__const char *__restrict __name,
+extern int getgrnam_r(const char *__restrict __name,
                        struct group *__restrict __resultbuf,
                        char *__restrict __buffer, size_t __buflen,
                        struct group **__restrict __result);
@@ -113,13 +107,13 @@ extern int fgetgrent_r(FILE *__restrict __stream,
 /* Store at most *NGROUPS members of the group set for USER into
    *GROUPS.  Also include GROUP.  The actual number of groups found is
    returned in *NGROUPS.  Return -1 if the if *NGROUPS is too small.  */
-extern int getgrouplist(__const char *__user, gid_t __group,
+extern int getgrouplist(const char *__user, gid_t __group,
                          gid_t *__groups, int *__ngroups);
 
 /* Initialize the group set for the current user
    by reading the group database and using all groups
    of which USER is a member.  Also include GROUP.  */
-extern int initgroups(__const char *__user, gid_t __group);
+extern int initgroups(const char *__user, gid_t __group);
 
 #if __GNUC_PREREQ(4,1)
 # pragma GCC visibility pop
diff --git a/include/libbb.h b/include/libbb.h
index 951ff2f1a..5b92574dd 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -69,21 +69,15 @@
 #include <dmalloc.h>
 #endif
 
-#if !ENABLE_USE_BB_PWD_GRP
-# include <pwd.h>
-# include <grp.h>
-#endif
+#include <pwd.h>
+#include <grp.h>
 #if ENABLE_FEATURE_SHADOWPASSWDS
-# if !ENABLE_USE_BB_SHADOW
-#  include <shadow.h>
-# endif
+# include <shadow.h>
 #endif
 
 /* Some libc's forget to declare these, do it ourself */
 
 extern char **environ;
-/* Set the group set for the current user to GROUPS (N of them).  */
-int setgroups(size_t n, const gid_t *groups);
 #if defined(__GLIBC__) && __GLIBC__ < 2
 int vdprintf(int d, const char *format, va_list ap);
 #endif
diff --git a/include/pwd_.h b/include/pwd_.h
index 6199034d2..c36e4686c 100644
--- a/include/pwd_.h
+++ b/include/pwd_.h
@@ -21,24 +21,17 @@
  *      POSIX Standard: 9.2.2 User Database Access      <pwd.h>
  */
 
-#ifndef _PWD_H
-#define _PWD_H 1
+#ifndef BB_PWD_H
+#define BB_PWD_H 1
 
 #if __GNUC_PREREQ(4,1)
 # pragma GCC visibility push(hidden)
 #endif
 
-/* The passwd structure.  */
-struct passwd {
-        char *pw_name;          /* Username.  */
-        char *pw_passwd;        /* Password.  */
-        uid_t pw_uid;           /* User ID.  */
-        gid_t pw_gid;           /* Group ID.  */
-        char *pw_gecos;         /* Real name.  */
-        char *pw_dir;           /* Home directory.  */
-        char *pw_shell;         /* Shell program.  */
-};
-
+/* This file is #included after #include <pwd.h>
+ * We will use libc-defined structures, but will #define finction names
+ * so that function calls are directed to bb_internal_XXX replacements
+ */
 
 #define setpwent    bb_internal_setpwent
 #define endpwent    bb_internal_endpwent
@@ -51,13 +44,11 @@ struct passwd {
 #define getpwuid_r  bb_internal_getpwuid_r
 #define getpwnam_r  bb_internal_getpwnam_r
 #define fgetpwent_r bb_internal_fgetpwent_r
-#define getpw       bb_internal_getpw
+//#define getpw       bb_internal_getpw
 
 
 /* All function names below should be remapped by #defines above
- * in order to not collide with libc names.
- * In theory it isn't necessary, but I saw weird interactions at link time.
- * Let's play safe */
+ * in order to not collide with libc names. */
 
 
 /* Rewind the password-file stream.  */
@@ -73,14 +64,14 @@ extern struct passwd *getpwent(void);
 extern struct passwd *fgetpwent(FILE *__stream);
 
 /* Write the given entry onto the given stream.  */
-extern int putpwent(__const struct passwd *__restrict __p,
+extern int putpwent(const struct passwd *__restrict __p,
                      FILE *__restrict __f);
 
 /* Search for an entry with a matching user ID.  */
 extern struct passwd *getpwuid(uid_t __uid);
 
 /* Search for an entry with a matching username.  */
-extern struct passwd *getpwnam(__const char *__name);
+extern struct passwd *getpwnam(const char *__name);
 
 /* Reentrant versions of some of the functions above.
 
@@ -99,7 +90,7 @@ extern int getpwuid_r(uid_t __uid,
                        char *__restrict __buffer, size_t __buflen,
                        struct passwd **__restrict __result);
 
-extern int getpwnam_r(__const char *__restrict __name,
+extern int getpwnam_r(const char *__restrict __name,
                        struct passwd *__restrict __resultbuf,
                        char *__restrict __buffer, size_t __buflen,
                        struct passwd **__restrict __result);
@@ -114,7 +105,7 @@ extern int fgetpwent_r(FILE *__restrict __stream,
 /* Re-construct the password-file line for the given uid
    in the given buffer.  This knows the format that the caller
    will expect, but this need not be the format of the password file.  */
-extern int getpw(uid_t __uid, char *__buffer);
+/* UNUSED extern int getpw(uid_t __uid, char *__buffer); */
 
 #if __GNUC_PREREQ(4,1)
 # pragma GCC visibility pop
diff --git a/include/rtc_.h b/include/rtc_.h
index 2e990581f..867edb3db 100644
--- a/include/rtc_.h
+++ b/include/rtc_.h
@@ -4,8 +4,8 @@
  * Licensed under the GPL-2 or later.
  */
 
-#ifndef _BB_RTC_H_
-#define _BB_RTC_H_
+#ifndef BB_RTC_H
+#define BB_RTC_H
 
 #include "libbb.h"
 
diff --git a/include/shadow_.h b/include/shadow_.h
index 5a8b71a47..73bed8400 100644
--- a/include/shadow_.h
+++ b/include/shadow_.h
@@ -19,32 +19,23 @@
 
 /* Declaration of types and functions for shadow password suite */
 
-#ifndef _SHADOW_H
-#define _SHADOW_H 1
+#ifndef BB_SHADOW_H
+#define BB_SHADOW_H 1
 
 #if __GNUC_PREREQ(4,1)
 # pragma GCC visibility push(hidden)
 #endif
 
+/* This file is #included after #include <shadow.h>
+ * We will use libc-defined structures, but will #define finction names
+ * so that function calls are directed to bb_internal_XXX replacements
+ */
+
 /* Paths to the user database files */
 #ifndef _PATH_SHADOW
 #define _PATH_SHADOW "/etc/shadow"
 #endif
 
-/* Structure of the password file */
-struct spwd {
-        char *sp_namp;          /* Login name */
-        char *sp_pwdp;          /* Encrypted password */
-        long sp_lstchg;         /* Date of last change */
-        long sp_min;            /* Minimum number of days between changes */
-        long sp_max;            /* Maximum number of days between changes */
-        long sp_warn;           /* Number of days to warn user to change the password */
-        long sp_inact;          /* Number of days the account may be inactive */
-        long sp_expire;         /* Number of days since 1970-01-01 until account expires */
-        unsigned long sp_flag;  /* Reserved */
-};
-
-
 #define setspent    bb_internal_setspent
 #define endspent    bb_internal_endspent
 #define getspent    bb_internal_getspent
@@ -61,9 +52,7 @@ struct spwd {
 
 
 /* All function names below should be remapped by #defines above
- * in order to not collide with libc names.
- * In theory it isn't necessary, but I saw weird interactions at link time.
- * Let's play safe */
+ * in order to not collide with libc names. */
 
 
 /* Open database for reading */
@@ -76,26 +65,26 @@ extern void endspent(void);
 extern struct spwd *getspent(void);
 
 /* Get shadow entry matching NAME */
-extern struct spwd *getspnam(__const char *__name);
+extern struct spwd *getspnam(const char *__name);
 
 /* Read shadow entry from STRING */
-extern struct spwd *sgetspent(__const char *__string);
+extern struct spwd *sgetspent(const char *__string);
 
 /* Read next shadow entry from STREAM */
 extern struct spwd *fgetspent(FILE *__stream);
 
 /* Write line containing shadow password entry to stream */
-extern int putspent(__const struct spwd *__p, FILE *__stream);
+extern int putspent(const struct spwd *__p, FILE *__stream);
 
 /* Reentrant versions of some of the functions above */
 extern int getspent_r(struct spwd *__result_buf, char *__buffer,
                        size_t __buflen, struct spwd **__result);
 
-extern int getspnam_r(__const char *__name, struct spwd *__result_buf,
+extern int getspnam_r(const char *__name, struct spwd *__result_buf,
                        char *__buffer, size_t __buflen,
                        struct spwd **__result);
 
-extern int sgetspent_r(__const char *__string, struct spwd *__result_buf,
+extern int sgetspent_r(const char *__string, struct spwd *__result_buf,
                         char *__buffer, size_t __buflen,
                         struct spwd **__result);