shell_cmds-198.tar.gz

[apple/shell_cmds.git] / sh / mail.c

diff --git a/sh/mail.c b/sh/mail.c
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+++ b/sh/mail.c
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+/*-
+ * Copyright (c) 1991, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)mail.c     8.2 (Berkeley) 5/4/95";
+#endif
+#endif /* not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Routines to check for mail.  (Perhaps make part of main.c?)
+ */
+
+#include "shell.h"
+#include "exec.h"      /* defines padvance() */
+#include "mail.h"
+#include "var.h"
+#include "output.h"
+#include "memalloc.h"
+#include "error.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+
+
+#define MAXMBOXES 10
+
+
+static int nmboxes;                    /* number of mailboxes */
+static time_t mailtime[MAXMBOXES];     /* times of mailboxes */
+
+
+
+/*
+ * Print appropriate message(s) if mail has arrived.  If the argument is
+ * nozero, then the value of MAIL has changed, so we just update the
+ * values.
+ */
+
+void
+chkmail(int silent)
+{
+       int i;
+       const char *mpath;
+       char *p;
+       char *q;
+       struct stackmark smark;
+       struct stat statb;
+
+       if (silent)
+               nmboxes = 10;
+       if (nmboxes == 0)
+               return;
+       setstackmark(&smark);
+       mpath = mpathset()? mpathval() : mailval();
+       for (i = 0 ; i < nmboxes ; i++) {
+               p = padvance(&mpath, "");
+               if (p == NULL)
+                       break;
+               if (*p == '\0')
+                       continue;
+               for (q = p ; *q ; q++);
+               if (q[-1] != '/')
+                       abort();
+               q[-1] = '\0';                   /* delete trailing '/' */
+#ifdef notdef /* this is what the System V shell claims to do (it lies) */
+               if (stat(p, &statb) < 0)
+                       statb.st_mtime = 0;
+               if (statb.st_mtime > mailtime[i] && ! silent) {
+                       out2str(pathopt? pathopt : "you have mail");
+                       out2c('\n');
+               }
+               mailtime[i] = statb.st_mtime;
+#else /* this is what it should do */
+               if (stat(p, &statb) < 0)
+                       statb.st_size = 0;
+               if (statb.st_size > mailtime[i] && ! silent) {
+                       out2str(pathopt? pathopt : "you have mail");
+                       out2c('\n');
+               }
+               mailtime[i] = statb.st_size;
+#endif
+       }
+       nmboxes = i;
+       popstackmark(&smark);
+}