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authorUlrich Drepper <drepper@redhat.com>2009-04-23 18:29:30 +0000
committerUlrich Drepper <drepper@redhat.com>2009-04-23 18:29:30 +0000
commit829fea46179b8d5cf25f8eae0b78550e3539ad60 (patch)
tree6f89526d907c86329565d6ebc825aaf7a32fa1d1 /gshadow
parent5497de87c94539c327c8341f3633b99d5b2dd674 (diff)
downloadglibc-829fea46179b8d5cf25f8eae0b78550e3539ad60.tar.gz
[BZ #9955]
2009-04-23 Ulrich Drepper <drepper@redhat.com> [BZ #9955] * gshadow/Makefile: New file. * gshadow/Versions: New file. * gshadow/fgetsgent.c: New file. * gshadow/fgetsgent_r.c: New file. * gshadow/getsgent.c: New file. * gshadow/getsgent_r.c: New file. * gshadow/getsgnam.c: New file. * gshadow/getsgnam_r.c: New file. * gshadow/gshadow.h: New file. * gshadow/putsgent.c: New file. * gshadow/sgetsgent.c: New file. * gshadow/sgetsgent_r.c: New file. * gshadow/tst-gshadow.c: New file. * include/gshadow.h: New file. * Makeconfig (all-subdirs): Add gshadow. * Makefile (installed-headers): Add gshadow/gshadow.h. * nss/Makefile (databases): Add sgrp. * nss/Versions: Add gshadow functions as private exports. * nss/nsswitch.conf: Add gshadow entry. * nss/sgrp-lookup.c: New file. * nss/nss_files/files-parse.c: Add STRING_LIST macro. Rewrite parse_list to handle STRING_LIST and TRAILING_LIST_PARSER. * nss/nss_files/files-sgrp.c: New file. * sysdeps/generic/paths.h: Add _PATH_GSHADOW. * sysdeps/unix/sysv/linux/paths.h: Likewise.
Diffstat (limited to 'gshadow')
-rw-r--r--gshadow/Makefile38
-rw-r--r--gshadow/Versions21
-rw-r--r--gshadow/fgetsgent.c88
-rw-r--r--gshadow/fgetsgent_r.c76
-rw-r--r--gshadow/getsgent.c30
-rw-r--r--gshadow/getsgent_r.c30
-rw-r--r--gshadow/getsgnam.c30
-rw-r--r--gshadow/getsgnam_r.c30
-rw-r--r--gshadow/gshadow.h131
-rw-r--r--gshadow/putsgent.c71
-rw-r--r--gshadow/sgetsgent.c78
-rw-r--r--gshadow/sgetsgent_r.c70
-rw-r--r--gshadow/tst-gshadow.c138
13 files changed, 831 insertions, 0 deletions
diff --git a/gshadow/Makefile b/gshadow/Makefile
new file mode 100644
index 0000000000..0c3d42b317
--- /dev/null
+++ b/gshadow/Makefile
@@ -0,0 +1,38 @@
+# Copyright (C) 2009 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, write to the Free
+# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+# 02111-1307 USA.
+
+#
+# Makefile for gshadow.
+#
+subdir := gshadow
+
+headers = gshadow.h
+routines = getsgent getsgnam sgetsgent fgetsgent putsgent \
+ getsgent_r getsgnam_r sgetsgent_r fgetsgent_r
+
+tests = tst-gshadow
+
+CFLAGS-getsgent_r.c = -fexceptions
+CFLAGS-getsgent.c = -fexceptions
+CFLAGS-fgetsgent.c = -fexceptions
+CFLAGS-fgetsgent_r.c = -fexceptions -D_IO_MTSAFE_IO
+CFLAGS-putsgent.c = -fexceptions -D_IO_MTSAFE_IO
+CFLAGS-getsgnam.c = -fexceptions
+CFLAGS-getsgnam_r.c = -fexceptions
+
+include ../Rules
diff --git a/gshadow/Versions b/gshadow/Versions
new file mode 100644
index 0000000000..00a410b74f
--- /dev/null
+++ b/gshadow/Versions
@@ -0,0 +1,21 @@
+libc {
+ GLIBC_2.10 {
+ # e*
+ endsgent;
+
+ # f*
+ fgetsgent; fgetsgent_r;
+
+ # g*
+ getsgent; getsgent_r; getsgnam; getsgnam_r; getsgent_r; getsgnam_r;
+
+ # p*
+ putsgent;
+
+ # s*
+ setsgent;
+
+ # s*
+ sgetsgent; sgetsgent_r;
+ }
+}
diff --git a/gshadow/fgetsgent.c b/gshadow/fgetsgent.c
new file mode 100644
index 0000000000..098edfe52e
--- /dev/null
+++ b/gshadow/fgetsgent.c
@@ -0,0 +1,88 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <bits/libc-lock.h>
+#include <gshadow.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+/* A reasonable size for a buffer to start with. */
+#define BUFLEN_SPWD 1024
+
+/* We need to protect the dynamic buffer handling. */
+__libc_lock_define_initialized (static, lock);
+
+libc_freeres_ptr (static char *buffer);
+
+/* Read one shadow entry from the given stream. */
+struct sgrp *
+fgetsgent (FILE *stream)
+{
+ static size_t buffer_size;
+ static struct sgrp resbuf;
+ fpos_t pos;
+ struct sgrp *result;
+ int save;
+
+ if (fgetpos (stream, &pos) != 0)
+ return NULL;
+
+ /* Get lock. */
+ __libc_lock_lock (lock);
+
+ /* Allocate buffer if not yet available. */
+ if (buffer == NULL)
+ {
+ buffer_size = BUFLEN_SPWD;
+ buffer = malloc (buffer_size);
+ }
+
+ while (buffer != NULL
+ && (__fgetsgent_r (stream, &resbuf, buffer, buffer_size, &result)
+ == ERANGE))
+ {
+ char *new_buf;
+ buffer_size += BUFLEN_SPWD;
+ new_buf = realloc (buffer, buffer_size);
+ if (new_buf == NULL)
+ {
+ /* We are out of memory. Free the current buffer so that the
+ process gets a chance for a normal termination. */
+ save = errno;
+ free (buffer);
+ __set_errno (save);
+ }
+ buffer = new_buf;
+
+ /* Reset the stream. */
+ if (fsetpos (stream, &pos) != 0)
+ buffer = NULL;
+ }
+
+ if (buffer == NULL)
+ result = NULL;
+
+ /* Release lock. Preserve error value. */
+ save = errno;
+ __libc_lock_unlock (lock);
+ __set_errno (save);
+
+ return result;
+}
diff --git a/gshadow/fgetsgent_r.c b/gshadow/fgetsgent_r.c
new file mode 100644
index 0000000000..25c05bf7ea
--- /dev/null
+++ b/gshadow/fgetsgent_r.c
@@ -0,0 +1,76 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <ctype.h>
+#include <errno.h>
+#include <gshadow.h>
+#include <stdio.h>
+
+/* Define a line parsing function using the common code
+ used in the nss_files module. */
+
+#define STRUCTURE sgrp
+#define ENTNAME sgent
+#define EXTERN_PARSER 1
+struct sgent_data {};
+
+#include <nss/nss_files/files-parse.c>
+
+
+/* Read one shadow entry from the given stream. */
+int
+__fgetsgent_r (FILE *stream, struct sgrp *resbuf, char *buffer, size_t buflen,
+ struct sgrp **result)
+{
+ char *p;
+
+ _IO_flockfile (stream);
+ do
+ {
+ buffer[buflen - 1] = '\xff';
+ p = fgets_unlocked (buffer, buflen, stream);
+ if (p == NULL && feof_unlocked (stream))
+ {
+ _IO_funlockfile (stream);
+ *result = NULL;
+ __set_errno (ENOENT);
+ return errno;
+ }
+ if (p == NULL || buffer[buflen - 1] != '\xff')
+ {
+ _IO_funlockfile (stream);
+ *result = NULL;
+ __set_errno (ERANGE);
+ return errno;
+ }
+
+ /* Skip leading blanks. */
+ while (isspace (*p))
+ ++p;
+ } while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
+ /* Parse the line. If it is invalid, loop to
+ get the next line of the file to parse. */
+ ! parse_line (buffer, (void *) resbuf, (void *) buffer, buflen,
+ &errno));
+
+ _IO_funlockfile (stream);
+
+ *result = resbuf;
+ return 0;
+}
+weak_alias (__fgetsgent_r, fgetsgent_r)
diff --git a/gshadow/getsgent.c b/gshadow/getsgent.c
new file mode 100644
index 0000000000..544227c537
--- /dev/null
+++ b/gshadow/getsgent.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2009.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <gshadow.h>
+
+
+#define LOOKUP_TYPE struct sgrp
+#define SETFUNC_NAME setsgent
+#define GETFUNC_NAME getsgent
+#define ENDFUNC_NAME endsgent
+#define DATABASE_NAME gshadow
+#define BUFLEN 1024
+
+#include "../nss/getXXent.c"
diff --git a/gshadow/getsgent_r.c b/gshadow/getsgent_r.c
new file mode 100644
index 0000000000..336110ec89
--- /dev/null
+++ b/gshadow/getsgent_r.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2009.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <gshadow.h>
+
+
+#define LOOKUP_TYPE struct sgrp
+#define SETFUNC_NAME setsgent
+#define GETFUNC_NAME getsgent
+#define ENDFUNC_NAME endsgent
+#define DATABASE_NAME gshadow
+#define BUFLEN 1024
+
+#include "../nss/getXXent_r.c"
diff --git a/gshadow/getsgnam.c b/gshadow/getsgnam.c
new file mode 100644
index 0000000000..7cd5b44210
--- /dev/null
+++ b/gshadow/getsgnam.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2009.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <gshadow.h>
+
+
+#define LOOKUP_TYPE struct sgrp
+#define FUNCTION_NAME getsgnam
+#define DATABASE_NAME gshadow
+#define ADD_PARAMS const char *name
+#define ADD_VARIABLES name
+#define BUFLEN 1024
+
+#include "../nss/getXXbyYY.c"
diff --git a/gshadow/getsgnam_r.c b/gshadow/getsgnam_r.c
new file mode 100644
index 0000000000..c89fb06bfa
--- /dev/null
+++ b/gshadow/getsgnam_r.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2009.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <gshadow.h>
+
+
+#define LOOKUP_TYPE struct sgrp
+#define FUNCTION_NAME getsgnam
+#define DATABASE_NAME gshadow
+#define ADD_PARAMS const char *name
+#define ADD_VARIABLES name
+#define BUFLEN 1024
+
+#include "../nss/getXXbyYY_r.c"
diff --git a/gshadow/gshadow.h b/gshadow/gshadow.h
new file mode 100644
index 0000000000..d0b28aeaa3
--- /dev/null
+++ b/gshadow/gshadow.h
@@ -0,0 +1,131 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* Declaration of types and functions for shadow group suite. */
+
+#ifndef _GSHADOW_H
+#define _GSHADOW_H 1
+
+#include <features.h>
+
+#include <paths.h>
+
+#define __need_FILE
+#include <stdio.h>
+#define __need_size_t
+#include <stddef.h>
+
+/* Path to the user database files. */
+#define GSHADOW _PATH_GSHADOW
+
+
+__BEGIN_DECLS
+
+/* Structure of the group file. */
+struct sgrp
+ {
+ char *sg_namp; /* Group name. */
+ char *sg_passwd; /* Encrypted password. */
+ char **sg_adm; /* Group administrator list. */
+ char **sg_mem; /* Group member list. */
+ };
+
+
+/* Open database for reading.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern void setsgent (void);
+
+/* Close database.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern void endsgent (void);
+
+/* Get next entry from database, perhaps after opening the file.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern struct sgrp *getsgent (void);
+
+/* Get shadow entry matching NAME.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern struct sgrp *getsgnam (__const char *__name);
+
+/* Read shadow entry from STRING.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern struct sgrp *sgetsgent (__const char *__string);
+
+/* Read next shadow entry from STREAM.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern struct sgrp *fgetsgent (FILE *__stream);
+
+/* Write line containing shadow password entry to stream.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern int putsgent (__const struct sgrp *__g, FILE *__stream);
+
+
+#ifdef __USE_MISC
+/* Reentrant versions of some of the functions above.
+
+ These functions are not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation they are cancellation points and
+ therefore not marked with __THROW. */
+extern int getsgent_r (struct sgrp *__result_buf, char *__buffer,
+ size_t __buflen, struct sgrp **__result);
+
+extern int getsgnam_r (__const char *__name, struct sgrp *__result_buf,
+ char *__buffer, size_t __buflen,
+ struct sgrp **__result);
+
+extern int sgetsgent_r (__const char *__string, struct sgrp *__result_buf,
+ char *__buffer, size_t __buflen,
+ struct sgrp **__result);
+
+extern int fgetsgent_r (FILE *__stream, struct sgrp *__result_buf,
+ char *__buffer, size_t __buflen,
+ struct sgrp **__result);
+#endif /* misc */
+
+__END_DECLS
+
+#endif /* gshadow.h */
diff --git a/gshadow/putsgent.c b/gshadow/putsgent.c
new file mode 100644
index 0000000000..938a71334c
--- /dev/null
+++ b/gshadow/putsgent.c
@@ -0,0 +1,71 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <gshadow.h>
+
+#define _S(x) x ? x : ""
+
+
+/* Write an entry to the given stream.
+ This must know the format of the group file. */
+int
+putsgent (const struct sgrp *g, FILE *stream)
+{
+ int errors = 0;
+
+ _IO_flockfile (stream);
+
+ if (fprintf (stream, "%s:%s:", g->sg_namp, _S (g->sg_passwd)) < 0)
+ ++errors;
+
+ bool first = true;
+ char **sp = g->sg_adm;
+ if (sp != NULL)
+ while (*sp != NULL)
+ {
+ if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
+ {
+ ++errors;
+ break;
+ }
+ first = false;
+ }
+ if (putc_unlocked (':', stream) == EOF)
+ ++errors;
+
+ first = true;
+ sp = g->sg_mem;
+ if (sp != NULL)
+ while (*sp != NULL)
+ {
+ if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
+ {
+ ++errors;
+ break;
+ }
+ first = false;
+ }
+ if (putc_unlocked ('\n', stream) == EOF)
+ ++errors;
+
+ _IO_funlockfile (stream);
+
+ return errors ? -1 : 0;
+}
diff --git a/gshadow/sgetsgent.c b/gshadow/sgetsgent.c
new file mode 100644
index 0000000000..94e131566b
--- /dev/null
+++ b/gshadow/sgetsgent.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <bits/libc-lock.h>
+#include <gshadow.h>
+#include <stdlib.h>
+
+
+/* A reasonable size for a buffer to start with. */
+#define BUFLEN_SPWD 1024
+
+/* We need to protect the dynamic buffer handling. */
+__libc_lock_define_initialized (static, lock);
+
+/* Read one shadow entry from the given stream. */
+struct sgrp *
+sgetsgent (const char *string)
+{
+ static char *buffer;
+ static size_t buffer_size;
+ static struct sgrp resbuf;
+ struct sgrp *result;
+ int save;
+
+ /* Get lock. */
+ __libc_lock_lock (lock);
+
+ /* Allocate buffer if not yet available. */
+ if (buffer == NULL)
+ {
+ buffer_size = BUFLEN_SPWD;
+ buffer = malloc (buffer_size);
+ }
+
+ while (buffer != NULL
+ && __sgetsgent_r (string, &resbuf, buffer, buffer_size, &result) != 0
+ && errno == ERANGE)
+ {
+ char *new_buf;
+ buffer_size += BUFLEN_SPWD;
+ new_buf = realloc (buffer, buffer_size);
+ if (new_buf == NULL)
+ {
+ /* We are out of memory. Free the current buffer so that the
+ process gets a chance for a normal termination. */
+ save = errno;
+ free (buffer);
+ __set_errno (save);
+ }
+ buffer = new_buf;
+ }
+
+ if (buffer == NULL)
+ result = NULL;
+
+ /* Release lock. Preserve error value. */
+ save = errno;
+ __libc_lock_unlock (lock);
+ __set_errno (save);
+
+ return result;
+}
diff --git a/gshadow/sgetsgent_r.c b/gshadow/sgetsgent_r.c
new file mode 100644
index 0000000000..72c51fe26b
--- /dev/null
+++ b/gshadow/sgetsgent_r.c
@@ -0,0 +1,70 @@
+/* Copyright (C) 2009 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <ctype.h>
+#include <errno.h>
+#include <gshadow.h>
+#include <stdio.h>
+#include <string.h>
+
+/* Define a line parsing function using the common code
+ used in the nss_files module. */
+
+#define STRUCTURE sgrp
+#define ENTNAME sgent
+struct sgent_data {};
+
+
+#define TRAILING_LIST_MEMBER sg_mem
+#define TRAILING_LIST_SEPARATOR_P(c) ((c) == ',')
+#include <nss/nss_files/files-parse.c>
+LINE_PARSER
+(,
+ STRING_FIELD (result->sg_namp, ISCOLON, 0);
+ if (line[0] == '\0'
+ && (result->sg_namp[0] == '+' || result->sg_namp[0] == '-'))
+ {
+ result->sg_passwd = NULL;
+ result->sg_adm = NULL;
+ result->sg_mem = NULL;
+ }
+ else
+ {
+ STRING_FIELD (result->sg_passwd, ISCOLON, 0);
+ STRING_LIST (result->sg_adm, ':');
+ }
+ )
+
+
+/* Read one shadow entry from the given stream. */
+int
+__sgetsgent_r (const char *string, struct sgrp *resbuf, char *buffer,
+ size_t buflen, struct sgrp **result)
+{
+ char *sp;
+ if (string < buffer || string >= buffer + buflen)
+ sp = strncpy (buffer, string, buflen);
+ else
+ sp = (char *) string;
+
+ int parse_result = parse_line (sp, resbuf, (void *) buffer, buflen, &errno);
+ *result = parse_result > 0 ? resbuf : NULL;
+
+ return *result == NULL ? errno : 0;
+}
+weak_alias (__sgetsgent_r, sgetsgent_r)
diff --git a/gshadow/tst-gshadow.c b/gshadow/tst-gshadow.c
new file mode 100644
index 0000000000..8c26a486a7
--- /dev/null
+++ b/gshadow/tst-gshadow.c
@@ -0,0 +1,138 @@
+#include <gshadow.h>
+#include <stdio.h>
+#include <string.h>
+
+
+static const struct sgrp data[] =
+ {
+ { (char *) "one", (char *) "pwdone",
+ (char *[]) { (char *) "admoneone", (char *) "admonetwo",
+ (char *) "admonethree", NULL },
+ (char *[]) { (char *) "memoneone", (char *) "memonetwo",
+ (char *) "memonethree", NULL } },
+ { (char *) "two", (char *) "pwdtwo",
+ (char *[]) { (char *) "admtwoone", (char *) "admtwotwo", NULL },
+ (char *[]) { (char *) "memtwoone", (char *) "memtwotwo",
+ (char *) "memtwothree", NULL } },
+ { (char *) "three", (char *) "pwdthree",
+ (char *[]) { (char *) "admthreeone", (char *) "admthreetwo", NULL },
+ (char *[]) { (char *) "memthreeone", (char *) "memthreetwo", NULL } },
+ { (char *) "four", (char *) "pwdfour",
+ (char *[]) { (char *) "admfourone", (char *) "admfourtwo", NULL },
+ (char *[]) { NULL } },
+ { (char *) "five", (char *) "pwdfive",
+ (char *[]) { NULL },
+ (char *[]) { (char *) "memfiveone", (char *) "memfivetwo", NULL } },
+ };
+#define ndata (sizeof (data) / sizeof (data[0]))
+
+
+int
+main (void)
+{
+ FILE *fp = fopen ("/tmp/aaa", "w+");//tmpfile ();
+ if (fp == NULL)
+ {
+ puts ("cannot open temporary file");
+ return 1;
+ }
+
+ for (size_t i = 0; i < ndata; ++i)
+ if (putsgent (&data[i], fp) != 0)
+ {
+ printf ("putsgent call %zu failed\n", i + 1);
+ return 1;
+ }
+
+ rewind (fp);
+
+ int result = 0;
+ int seen = -1;
+ struct sgrp *g;
+ while ((g = fgetsgent (fp)) != NULL)
+ {
+ ++seen;
+ if (strcmp (g->sg_namp, data[seen].sg_namp) != 0)
+ {
+ printf ("sg_namp of entry %d does not match: %s vs %s\n",
+ seen + 1, g->sg_namp, data[seen].sg_namp);
+ result = 1;
+ }
+ if (strcmp (g->sg_passwd, data[seen].sg_passwd) != 0)
+ {
+ printf ("sg_passwd of entry %d does not match: %s vs %s\n",
+ seen + 1, g->sg_passwd, data[seen].sg_passwd);
+ result = 1;
+ }
+ if (g->sg_adm == NULL)
+ {
+ printf ("sg_adm of entry %d is NULL\n", seen + 1);
+ result = 1;
+ }
+ else
+ {
+ int i = 1;
+ char **sp1 = g->sg_adm;
+ char **sp2 = data[seen].sg_adm;
+ while (*sp1 != NULL && *sp2 != NULL)
+ {
+ if (strcmp (*sp1, *sp2) != 0)
+ {
+ printf ("sg_adm[%d] of entry %d does not match: %s vs %s\n",
+ i, seen + 1, *sp1, *sp2);
+ result = 1;
+ }
+ ++sp1;
+ ++sp2;
+ ++i;
+ }
+ if (*sp1 == NULL && *sp2 != NULL)
+ {
+ printf ("sg_adm of entry %d has too few entries\n", seen + 1);
+ result = 1;
+ }
+ else if (*sp1 != NULL && *sp2 == NULL)
+ {
+ printf ("sg_adm of entry %d has too many entries\n", seen + 1);
+ result = 1;
+ }
+ }
+ if (g->sg_mem == NULL)
+ {
+ printf ("sg_mem of entry %d is NULL\n", seen + 1);
+ result = 1;
+ }
+ else
+ {
+ int i = 1;
+ char **sp1 = g->sg_mem;
+ char **sp2 = data[seen].sg_mem;
+ while (*sp1 != NULL && *sp2 != NULL)
+ {
+ if (strcmp (*sp1, *sp2) != 0)
+ {
+ printf ("sg_mem[%d] of entry %d does not match: %s vs %s\n",
+ i, seen + 1, *sp1, *sp2);
+ result = 1;
+ }
+ ++sp1;
+ ++sp2;
+ ++i;
+ }
+ if (*sp1 == NULL && *sp2 != NULL)
+ {
+ printf ("sg_mem of entry %d has too few entries\n", seen + 1);
+ result = 1;
+ }
+ else if (*sp1 != NULL && *sp2 == NULL)
+ {
+ printf ("sg_mem of entry %d has too many entries\n", seen + 1);
+ result = 1;
+ }
+ }
+ }
+
+ fclose (fp);
+
+ return result;
+}