3 * utils.c -- various utility routines
7 * This code is Copyright (c) 2006, by the authors of nmh. See the
8 * COPYRIGHT file in the root directory of the nmh distribution for
9 * complete copyright information.
19 * We allocate space for messages (msgs array)
20 * this number of elements at a time.
28 mh_xmalloc(size_t size)
33 adios(NULL, "Tried to malloc 0 bytes");
35 memory = malloc(size);
37 adios(NULL, "Malloc failed");
46 mh_xrealloc(void *ptr, size_t size)
50 /* Some non-POSIX realloc()s don't cope with realloc(NULL,sz) */
52 return mh_xmalloc(size);
55 adios(NULL, "Tried to realloc 0bytes");
57 memory = realloc(ptr, size);
59 adios(NULL, "Realloc failed");
65 * Return the present working directory, if the current directory does not
66 * exist, or is too long, make / the pwd.
72 static char curwd[PATH_MAX];
74 if (!getcwd (curwd, PATH_MAX)) {
75 admonish (NULL, "unable to determine working directory");
76 if (!mypath || !*mypath
77 || (strcpy (curwd, mypath), chdir (curwd)) == -1) {
84 if ((cp = curwd + strlen (curwd) - 1) > curwd && *cp == '/')
91 * add -- If "s1" is NULL, this routine just creates a
92 * -- copy of "s2" into newly malloc'ed memory.
94 * -- If "s1" is not NULL, then copy the concatenation
95 * -- of "s1" and "s2" (note the order) into newly
96 * -- malloc'ed memory. Then free "s1".
99 add (char *s2, char *s1)
102 size_t len1 = 0, len2 = 0;
109 cp = mh_xmalloc (len1 + len2 + 1);
111 /* Copy s1 and free it */
113 memcpy (cp, s1, len1);
119 memcpy (cp + len1, s2, len2);
121 /* Now NULL terminate the string */
122 cp[len1 + len2] = '\0';
129 * Check to see if a folder exists.
131 int folder_exists(char *folder)
136 if (stat (folder, &st) == -1) {
137 /* The folder either doesn't exist, or we hit an error. Either way
142 /* We can see a folder with the right name */
152 * Check to see if a folder exists, if not, prompt the user to create
155 void create_folder(char *folder, int autocreate, void (*done_callback)(int))
161 if (stat (folder, &st) == -1) {
163 adios (folder, "error on folder");
164 if (autocreate == 0) {
165 /* ask before creating folder */
166 cp = concat ("Create folder \"", folder, "\"? ", NULL);
170 } else if (autocreate == -1) {
171 /* do not create, so exit */
174 if (!makedir (folder))
175 adios (NULL, "unable to create folder %s", folder);
181 * Return the number of digits in a nonnegative integer.
190 adios (NULL, "oops, num_digits called with negative value");
204 * Append a message arg to an array of them, resizing it if necessary.
205 * The function is written to suit the arg parsing code it was extracted
206 * from, and will probably be changed when the other code is cleaned up.
209 app_msgarg(struct msgs_array *msgs, char *cp)
211 if(msgs->size >= msgs->max)
212 msgs->msgs = mh_xrealloc(msgs->msgs, (msgs->max+=MAXMSGS)*sizeof(*msgs->msgs));
213 msgs->msgs[msgs->size++] = cp;
216 /* Open a form or components file */
218 open_form(char **form, char *def)
222 if ((in = open (etcpath (*form), O_RDONLY)) == NOTOK)
223 adios (*form, "unable to open form file");
225 if ((in = open (etcpath (def), O_RDONLY)) == NOTOK)
226 adios (def, "unable to open default components file");