/*
* utils.c -- various utility routines
*
- * $Id$
- *
* This code is Copyright (c) 2006, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
-#include <h/nmh.h>
+#include <h/mh.h>
#include <h/utils.h>
-#include <stdlib.h>
+#include <fcntl.h>
+
+/* sbr/signals.c */
+extern int setup_signal_handlers();
+
+/* sbr/m_mktemp.c */
+extern void remove_registered_files_atexit();
+
+
+/*
+ * We allocate space for messages (msgs array)
+ * this number of elements at a time.
+ */
+#define MAXMSGS 256
+/*
+ * Safely call malloc
+ */
void *
mh_xmalloc(size_t size)
{
return memory;
}
+/*
+ * Safely call realloc
+ */
void *
mh_xrealloc(void *ptr, size_t size)
{
void *memory;
+ /* Some non-POSIX realloc()s don't cope with realloc(NULL,sz) */
+ if (!ptr)
+ return mh_xmalloc(size);
+
if (size == 0)
adios(NULL, "Tried to realloc 0bytes");
return memory;
}
+
+/*
+ * Return the present working directory, if the current directory does not
+ * exist, or is too long, make / the pwd.
+ */
+char *
+pwd(void)
+{
+ register char *cp;
+ static char curwd[PATH_MAX];
+
+ if (!getcwd (curwd, PATH_MAX)) {
+ admonish (NULL, "unable to determine working directory");
+ if (!mypath || !*mypath
+ || (strcpy (curwd, mypath), chdir (curwd)) == -1) {
+ strcpy (curwd, "/");
+ chdir (curwd);
+ }
+ return curwd;
+ }
+
+ if ((cp = curwd + strlen (curwd) - 1) > curwd && *cp == '/')
+ *cp = '\0';
+
+ return curwd;
+}
+
+/*
+ * add -- If "s1" is NULL, this routine just creates a
+ * -- copy of "s2" into newly malloc'ed memory.
+ * --
+ * -- If "s1" is not NULL, then copy the concatenation
+ * -- of "s1" and "s2" (note the order) into newly
+ * -- malloc'ed memory. Then free "s1".
+ */
+char *
+add (const char *s2, char *s1)
+{
+ char *cp;
+ size_t len1 = 0, len2 = 0;
+
+ if (s1)
+ len1 = strlen (s1);
+ if (s2)
+ len2 = strlen (s2);
+
+ cp = mh_xmalloc (len1 + len2 + 1);
+
+ /* Copy s1 and free it */
+ if (s1) {
+ memcpy (cp, s1, len1);
+ free (s1);
+ }
+
+ /* Copy s2 */
+ if (s2)
+ memcpy (cp + len1, s2, len2);
+
+ /* Now NULL terminate the string */
+ cp[len1 + len2] = '\0';
+
+ return cp;
+}
+
+/*
+ * addlist
+ * Append an item to a comma separated list
+ */
+char *
+addlist (char *list, const char *item)
+{
+ if (list)
+ list = add (", ", list);
+
+ return add (item, list);
+}
+
+/*
+ * folder_exists
+ * Check to see if a folder exists.
+ */
+int folder_exists(const char *folder)
+{
+ struct stat st;
+ int exists = 0;
+
+ if (stat (folder, &st) == -1) {
+ /* The folder either doesn't exist, or we hit an error. Either way
+ * return a failure.
+ */
+ exists = 0;
+ } else {
+ /* We can see a folder with the right name */
+ exists = 1;
+ }
+
+ return exists;
+}
+
+
+/*
+ * create_folder
+ * Check to see if a folder exists, if not, prompt the user to create
+ * it.
+ */
+void create_folder(char *folder, int autocreate, void (*done_callback)(int))
+{
+ struct stat st;
+ extern int errno;
+ char *cp;
+
+ if (stat (folder, &st) == -1) {
+ if (errno != ENOENT)
+ adios (folder, "error on folder");
+ if (autocreate == 0) {
+ /* ask before creating folder */
+ cp = concat ("Create folder \"", folder, "\"? ", NULL);
+ if (!getanswer (cp))
+ done_callback (1);
+ free (cp);
+ } else if (autocreate == -1) {
+ /* do not create, so exit */
+ done_callback (1);
+ }
+ if (!makedir (folder))
+ adios (NULL, "unable to create folder %s", folder);
+ }
+}
+
+/*
+ * num_digits
+ * Return the number of digits in a nonnegative integer.
+ */
+int
+num_digits (int n)
+{
+ int ndigits = 0;
+
+ /* Sanity check */
+ if (n < 0)
+ adios (NULL, "oops, num_digits called with negative value");
+
+ if (n == 0)
+ return 1;
+
+ while (n) {
+ n /= 10;
+ ndigits++;
+ }
+
+ return ndigits;
+}
+
+/*
+ * Append a message arg to an array of them, resizing it if necessary.
+ * Really a simple vector-of-(char *) maintenance routine.
+ */
+void
+app_msgarg(struct msgs_array *msgs, char *cp)
+{
+ if(msgs->size >= msgs->max) {
+ msgs->max += MAXMSGS;
+ msgs->msgs = mh_xrealloc(msgs->msgs,
+ msgs->max * sizeof(*msgs->msgs));
+ }
+ msgs->msgs[msgs->size++] = cp;
+}
+
+/*
+ * Append a message number to an array of them, resizing it if necessary.
+ * Like app_msgarg, but with a vector-of-ints instead.
+ */
+
+void
+app_msgnum(struct msgnum_array *msgs, int msgnum)
+{
+ if (msgs->size >= msgs->max) {
+ msgs->max += MAXMSGS;
+ msgs->msgnums = mh_xrealloc(msgs->msgnums,
+ msgs->max * sizeof(*msgs->msgnums));
+ }
+ msgs->msgnums[msgs->size++] = msgnum;
+}
+
+/* Open a form or components file */
+int
+open_form(char **form, char *def)
+{
+ int in;
+ if (*form) {
+ if ((in = open (etcpath (*form), O_RDONLY)) == NOTOK)
+ adios (*form, "unable to open form file");
+ } else {
+ if ((in = open (etcpath (def), O_RDONLY)) == NOTOK)
+ adios (def, "unable to open default components file");
+ *form = def;
+ }
+ return in;
+}
+
+
+/*
+ * Finds first occurrence of str in buf. buf is not a C string but a
+ * byte array of length buflen. str is a null-terminated C string.
+ * find_str() does not modify buf but passes back a non-const char *
+ * pointer so that the caller can modify it.
+ */
+char *
+find_str (const char buf[], size_t buflen, const char *str) {
+ const size_t len = strlen (str);
+ size_t i;
+
+ for (i = 0; i + len <= buflen; ++i, ++buf) {
+ if (! memcmp (buf, str, len)) return (char *) buf;
+ }
+
+ return NULL;
+}
+
+
+/*
+ * Finds last occurrence of str in buf. buf is not a C string but a
+ * byte array of length buflen. str is a null-terminated C string.
+ * find_str() does not modify buf but passes back a non-const char *
+ * pointer so that the caller can modify it.
+ */
+char *
+rfind_str (const char buf[], size_t buflen, const char *str) {
+ const size_t len = strlen (str);
+ size_t i;
+
+ for (i = 0, buf += buflen - len; i + len <= buflen; ++i, --buf) {
+ if (! memcmp (buf, str, len)) return (char *) buf;
+ }
+
+ return NULL;
+}
+
+
+/* POSIX doesn't have strcasestr() so emulate it. */
+char *
+nmh_strcasestr (const char *s1, const char *s2) {
+ const size_t len = strlen (s2);
+
+ if (isupper ((unsigned char) s2[0]) || islower ((unsigned char)s2[0])) {
+ char first[3];
+ first[0] = (char) toupper ((unsigned char) s2[0]);
+ first[1] = (char) tolower ((unsigned char) s2[0]);
+ first[2] = '\0';
+
+ for (s1 = strpbrk (s1, first); s1; s1 = strpbrk (++s1, first)) {
+ if (! strncasecmp (s1, s2, len)) return (char *) s1;
+ }
+ } else {
+ for (s1 = strchr (s1, s2[0]); s1; s1 = strchr (++s1, s2[0])) {
+ if (! strncasecmp (s1, s2, len)) return (char *) s1;
+ }
+ }
+
+ return NULL;
+}
+
+
+int
+nmh_init(const char *argv0, int read_context) {
+ setlocale(LC_ALL, "");
+
+ invo_name = r1bindex ((char *) argv0, '/');
+
+ if (setup_signal_handlers()) {
+ admonish("sigaction", "unable to set up signal handlers");
+ }
+
+ /* POSIX atexit() does not define any error conditions. */
+ if (atexit(remove_registered_files_atexit)) {
+ admonish("atexit", "unable to register atexit function");
+ }
+
+ if (read_context) {
+ context_read();
+ return OK;
+ } else {
+ int status = context_foil(NULL);
+ if (status != OK) {
+ advise("", "failed to create minimal profile/conext");
+ }
+ return status;
+ }
+}
projects / nmh / blobdiff