#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sysexits.h>
/*
** We allocate space for messages (msgs array)
#define MAXMSGS 256
/*
-** Safely call malloc
+** Safely call realloc
*/
void *
-mh_xmalloc(size_t size)
+mh_xrealloc(void *ptr, size_t size)
{
void *memory;
- if (size == 0)
- adios(NULL, "Tried to malloc 0 bytes");
+ /* Some non-POSIX realloc()s don't cope with realloc(NULL,sz) */
+ if (!ptr) {
+ return mh_xcalloc(1, size);
+ }
+ if (size == 0) {
+ adios(EX_SOFTWARE, NULL, "Tried to realloc 0 bytes");
+ }
- memory = malloc(size);
- if (!memory)
- adios(NULL, "Malloc failed");
+ memory = realloc(ptr, size);
+ if (!memory) {
+ adios(EX_OSERR, NULL, "Realloc failed");
+ }
return memory;
}
/*
-** Safely call realloc
+** Safely call calloc
*/
void *
-mh_xrealloc(void *ptr, size_t size)
+mh_xcalloc(size_t nmemb, 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");
+ if (nmemb == 0 || size == 0) {
+ adios(EX_SOFTWARE, NULL, "Tried to calloc 0 bytes");
+ }
- memory = realloc(ptr, size);
- if (!memory)
- adios(NULL, "Realloc failed");
+ if ((memory = calloc(nmemb, size))) {
+ return memory;
+ } else {
+ adios(EX_OSERR, NULL, "calloc failed");
+ }
+}
- return memory;
+/*
+** Free a pointer and set it to NULL.
+*/
+void
+mh_free0(void * ptr)
+{
+ void ** p;
+ p = ptr;
+ free(*p);
+ *p = NULL;
}
/*
char *
pwd(void)
{
- register char *cp;
+ char *cp;
static char curwd[PATH_MAX];
if (!getcwd(curwd, PATH_MAX)) {
/*
** add -- If "s1" is NULL, this routine just creates a
** -- copy of "s2" into newly malloc'ed memory.
-** -- (use getcpy() instead in this case)
+** -- (use mh_xstrdup() instead in this case)
** --
** -- 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(char *s2, char *s1)
+add(const char *s2, char *s1)
{
char *cp;
size_t len1 = 0, len2 = 0;
- if (s1)
+ if (s1) {
len1 = strlen(s1);
- if (s2)
+ }
+ if (s2) {
len2 = strlen(s2);
+ }
- cp = mh_xmalloc(len1 + len2 + 1);
+ cp = mh_xcalloc(len1 + len2 + 1, sizeof(char));
/* Copy s1 and free it */
if (s1) {
memcpy(cp, s1, len1);
- free(s1);
+ mh_free0(&s1);
}
/* Copy s2 */
- if (s2)
+ if (s2) {
memcpy(cp + len1, s2, len2);
+ }
/* Now NULL terminate the string */
cp[len1 + len2] = '\0';
return cp;
}
-/*
-** folder_exists
-** Check to see if a folder exists.
-*/
-int
-folder_exists(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
char *cp;
if (stat(folder, &st) == -1) {
- if (errno != ENOENT)
- adios(folder, "error on folder");
+ if (errno != ENOENT) {
+ adios(EX_IOERR, 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);
+ if (!getanswer(cp)) {
+ done_callback(EX_CANTCREAT);
+ }
+ mh_free0(&cp);
} else if (autocreate == -1) {
/* do not create, so exit */
- done_callback(1);
+ done_callback(EX_CANTCREAT);
+ }
+ if (!makedir(folder)) {
+ adios(EX_CANTCREAT, NULL, "unable to create folder %s", folder);
}
- if (!makedir(folder))
- adios(NULL, "unable to create folder %s", folder);
}
}
int ndigits = 0;
/* Sanity check */
- if (n < 0)
- adios(NULL, "oops, num_digits called with negative value");
+ if (n < 0) {
+ adios(EX_SOFTWARE, NULL, "oops, num_digits called with negative value");
+ }
- if (n == 0)
+ if (n == 0) {
return 1;
+ }
while (n) {
n /= 10;
void
app_msgarg(struct msgs_array *msgs, char *cp)
{
- if(msgs->size >= msgs->max)
+ if(msgs->size >= msgs->max) {
msgs->msgs = mh_xrealloc(msgs->msgs,
(msgs->max+=MAXMSGS)*sizeof(*msgs->msgs));
+ }
msgs->msgs[msgs->size++] = cp;
}
-/* Open a form or components file */
-int
-open_form(char **form, char *def)
+/*
+** mh_xstrdup() is a wrapper of strdup() to replace getcpy(). It returns
+** a copy of its argument if this is nonnull; otherwise, it returns a
+** string of length 0.
+*/
+char *
+mh_xstrdup(char * s)
{
- 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;
+ char * tmp;
+ tmp = strdup(s ? s : "");
+ if (!tmp) {
+ adios(EX_OSERR, "strdup", "can't copy string");
}
- return in;
+ return tmp;
}
projects / mmh / blobdiff