X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/e14b80c187fdcd00920eed669a8333d7c12a4dd8..d6e1f1700c2ebb3a357885d78c8f76ab6bbe3dac:/sbr/utils.c?ds=inline

diff --git a/sbr/utils.c b/sbr/utils.c
index 989a9c8b..e5ed66aa 100644
--- a/sbr/utils.c
+++ b/sbr/utils.c
@@ -17,6 +17,7 @@ extern int setup_signal_handlers();
 /* sbr/m_mktemp.c */
 extern void remove_registered_files_atexit();
 
+extern char *mhdocdir;
 
 /*
  * We allocate space for messages (msgs array)
@@ -64,6 +65,24 @@ mh_xrealloc(void *ptr, size_t size)
     return memory;
 }
 
+/*
+ * Safely call calloc
+ */
+void *
+mh_xcalloc(size_t nmemb, size_t size)
+{
+    void *memory;
+
+    if (nmemb == 0  ||  size == 0)
+        adios(NULL, "Tried to calloc 0 bytes");
+
+    if ((memory = calloc(nmemb, size))) {
+        return memory;
+    } else {
+        adios(NULL, "calloc failed");
+    }
+}
+
 /*
  * Return the present working directory, if the current directory does not
  * exist, or is too long, make / the pwd.
@@ -79,7 +98,9 @@ pwd(void)
         if (!mypath || !*mypath
                 || (strcpy (curwd, mypath), chdir (curwd)) == -1) {
             strcpy (curwd, "/");
-            chdir (curwd);
+            if (chdir (curwd) < 0) {
+                advise (curwd, "chdir");
+            }
         }
         return curwd;
     }
@@ -180,7 +201,7 @@ void create_folder(char *folder, int autocreate, void (*done_callback)(int))
         if (autocreate == 0) {
             /* ask before creating folder */
             cp = concat ("Create folder \"", folder, "\"? ", NULL);
-            if (!getanswer (cp))
+            if (!read_yes_or_no_if_tty (cp))
                 done_callback (1);
             free (cp);
         } else if (autocreate == -1) {
@@ -328,7 +349,10 @@ nmh_strcasestr (const char *s1, const char *s2) {
 
 int
 nmh_init(const char *argv0, int read_context) {
-    setlocale(LC_ALL, "");
+    if (! setlocale(LC_ALL, "")) {
+        admonish(NULL, "setlocale failed, check your LC_ALL, LC_CTYPE, and "
+                 "LANG environment variables");
+    }
 
     invo_name = r1bindex ((char *) argv0, '/');
 
@@ -341,8 +365,47 @@ nmh_init(const char *argv0, int read_context) {
         admonish("atexit", "unable to register atexit function");
     }
 
+    /* Read context, if supposed to. */
     if (read_context) {
+        int allow_version_check = 1;
+        int check_older_version = 0;
+        char *cp;
+
         context_read();
+
+        if (read_context != 1  ||
+            ((cp = context_find ("Welcome")) && strcasecmp (cp, "disable") == 0)) {
+            allow_version_check = 0;
+        } else if ((cp = getenv ("MHCONTEXT")) != NULL && *cp != '\0') {
+            /* Context file comes from $MHCONTEXT, so only print the message
+               if the context file has an older version.  If it does, or if it
+               doesn't have a version at all, update the version. */
+            check_older_version = 1;
+        }
+
+        /* Check to see if the user is running a different (or older, if
+           specified) version of nmh than they had run bfore, and notify them
+           if so.  But only if read_context was set to a value to enable. */
+        if (allow_version_check  &&  isatty (fileno (stdin))  &&
+            isatty (fileno (stdout))  &&  isatty (fileno (stderr))) {
+            if (nmh_version_changed (check_older_version)) {
+                printf ("==================================================="
+                        "====================\n");
+                printf ("Welcome to nmh version %s\n\n", VERSION);
+                printf ("See the release notes in %s/NEWS .\n\n",
+                         mhdocdir);
+                print_intro (stdout, 1);
+                printf ("\nThis message will not be repeated until "
+                        "nmh is next updated.\n");
+                printf ("==================================================="
+                        "====================\n\n");
+
+                fputs ("Press enter to continue: ", stdout);
+                (void) read_line ();
+                putchar ('\n');
+            }
+        }
+
         return OK;
     } else {
         int status = context_foil(NULL);
@@ -353,6 +416,55 @@ nmh_init(const char *argv0, int read_context) {
     }
 }
 
+
+/*
+ * Check stored version, and return 1 if out-of-date or non-existent.
+ * Because the output of "mhparam version" is prefixed with "nmh-",
+ * use that prefix here.
+ */
+int
+nmh_version_changed (int older) {
+    const char *const context_version = context_find("Version");
+
+    if (older) {
+        /* Convert the version strings to floats and compare them.  This will
+           break for versions with multiple decimal points, etc. */
+        const float current_version = strtof (VERSION, NULL);
+        const float old_version =
+            context_version  &&  strncmp (context_version, "nmh-", 4) == 0
+            ?  strtof (context_version + 4, NULL)
+            :  99999999;
+
+        if (context_version == NULL  ||  old_version < current_version) {
+            context_replace ("Version", "nmh-" VERSION);
+        }
+
+        return old_version < current_version  ?  1  :  0;
+    } else {
+        if (context_version == NULL  ||  strcmp(context_version, "nmh-" VERSION) != 0) {
+            context_replace ("Version", "nmh-" VERSION);
+
+            return 1;
+        } else {
+            return 0;
+        }
+    }
+}
+
+
+/* Returns copy of argument str with all characters converted to upper
+   case, and trimmed whitespace (see cpytrim()) . */
+char *
+upcase (const char *str) {
+    char *up = cpytrim (str);
+    char *cp;
+
+    for (cp = up; *cp; ++cp) { *cp = toupper ((unsigned char) *cp); }
+
+    return up;
+}
+
+
 /*
  * Scan for any 8-bit characters.  Return 1 if they exist.
  *
@@ -372,3 +484,25 @@ contains8bit(const char *start, const char *end)
 
     return 0;
 }
+
+
+/*
+ * See if input has any 8-bit bytes.
+ */
+int
+scan_input (int fd, int *eightbit) {
+    int state;
+    char buf[BUFSIZ];
+
+    *eightbit = 0;
+    lseek (fd, (off_t) 0, SEEK_SET);
+
+    while ((state = read (fd, buf, sizeof buf)) > 0) {
+        if (contains8bit (buf, buf + state)) {
+            *eightbit = 1;
+            return OK;
+        }
+    }
+
+    return state == NOTOK  ?  NOTOK  :  OK;
+}