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-rw-r--r--libc/unistd/usershell.c172
1 files changed, 56 insertions, 116 deletions
diff --git a/libc/unistd/usershell.c b/libc/unistd/usershell.c
index 10c5bf1a5..2a6b66504 100644
--- a/libc/unistd/usershell.c
+++ b/libc/unistd/usershell.c
@@ -1,134 +1,74 @@
-/*
- * Copyright (c) 1985, 1993
- * The Regents of the University of California. All rights reserved.
+/* setusershell(), getusershell(), endusershell() for uClibc.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
+ * Copyright (C) 2010 Bernhard Reutner-Fischer <uclibc@uclibc.org>
*
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * This version has been hevily modified for use with uClibc
- * November 2002, Erik Andersen <andersen@codepoet.org>
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in
+ * this tarball.
+ */
+/* My manpage reads:
+ * The getusershell() function returns the next line from the file
+ * /etc/shells, opening the file if necessary. The line should contain
+ * the pathname of a valid user shell. If /etc/shells does not exist
+ * or is unreadable, getusershell() behaves as if /bin/sh and /bin/csh
+ * were listed in the file.
+ * The getusershell() function returns a NULL pointer on end-of-file.
*/
-
-#include <sys/param.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <stdio.h>
-#include <stdio_ext.h>
-#include <ctype.h>
-#include <stdlib.h>
#include <unistd.h>
+#include <stdlib.h>
#include <paths.h>
+#include <string.h>
+#include "internal/parse_config.h"
#if defined __USE_BSD || (defined __USE_XOPEN && !defined __USE_UNIX98)
-/*
- * Local shells should NOT be added here. They should be added in
- * /etc/shells.
- */
-
-static const char * const validsh[] = { _PATH_BSHELL, _PATH_CSHELL, NULL };
-static char **curshell, **shells, *strings;
-static char **initshells __P((void));
-
-/*
- * Get a list of shells from _PATH_SHELLS, if it exists.
- */
-char * getusershell(void)
-{
- char *ret;
-
- if (curshell == NULL)
- curshell = initshells();
- ret = *curshell;
- if (ret != NULL)
- curshell++;
- return (ret);
-}
-
-static void __free_initshell_memory(void)
-{
- free(shells);
- shells = NULL;
- free(strings);
- strings = NULL;
-}
+static const char * const defaultsh[] = { _PATH_BSHELL, _PATH_CSHELL, NULL};
+static char *shellb, **shells;
+static parser_t *shellp;
void endusershell(void)
{
- __free_initshell_memory();
- curshell = NULL;
+ if (shellp) {
+ shells = (char**) shellb;
+ while (shells && *shells) {
+ char*xxx = *shells++;
+ free(xxx);
+ }
+ config_close(shellp);
+ shellp = NULL;
+ }
+ free(shellb);
+ shellb = NULL;
+ shells = NULL;
}
-
void setusershell(void)
{
- curshell = initshells();
-}
+ endusershell();
+ shellp = config_open(_PATH_SHELLS);
+ if (shellp == NULL)
+ shells = (char **)defaultsh;
+ else {
+ char **shell = NULL;
+ int pos = 0;
-static char ** initshells(void)
-{
- register char **sp, *cp;
- register FILE *fp;
- struct stat statb;
- int flen;
+ while (config_read(shellp, &shell, 1, 1, "# \t", PARSE_NORMAL))
+ {
+ shellb = realloc(shellb, (pos + 2) * sizeof(char*));
+ shells = (char**) shellb + pos++;
+ *shells++ = strdup(*shell);
+ *shells = NULL;
- __free_initshell_memory();
-
- if ((fp = fopen(_PATH_SHELLS, "r")) == NULL)
- return (char **) validsh;
- if (fstat(fileno(fp), &statb) == -1) {
- goto cleanup;
- }
- if ((strings = malloc((unsigned)statb.st_size + 1)) == NULL) {
- goto cleanup;
- }
- if ((shells = calloc((unsigned)statb.st_size / 3, sizeof (char *))) == NULL) {
- goto cleanup;
- }
- /* No threads using this stream. */
-#ifdef __UCLIBC_HAS_THREADS__
- __fsetlocking (fp, FSETLOCKING_BYCALLER);
-#endif
- sp = shells;
- cp = strings;
- flen = statb.st_size;
- while (fgets_unlocked(cp, flen - (cp - strings), fp) != NULL) {
- while (*cp != '#' && *cp != '/' && *cp != '\0')
- cp++;
- if (*cp == '#' || *cp == '\0')
- continue;
- *sp++ = cp;
- while (!isspace(*cp) && *cp != '#' && *cp != '\0')
- cp++;
- *cp++ = '\0';
- }
- *sp = NULL;
- fclose(fp);
- return (shells);
-
-cleanup:
- __free_initshell_memory();
- fclose(fp);
- return (char **) validsh;
+ }
+ shells = (char **)shellb;
+ }
+}
+char *getusershell(void)
+{
+ char *sh;
+ if (shells == NULL)
+ setusershell();
+ sh = *shells;
+ if (sh)
+ shells++;
+ return sh;
}
#endif