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/*
* xcommon.c - various functions put together to avoid basic error checking.
*
* added fcntl locking by Kjetil T. (kjetilho@math.uio.no) - aeb, 950927
*
* 1999-02-22 Arkadiusz Mikiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
*
* 2006-06-06 Amit Gud <agud@redhat.com>
* - Moved code snippets here from mount/sundries.c of util-linux
* and merged code from support/nfs/xmalloc.c by Olaf Kirch <okir@monad.swb.de> here.
*/
#include <unistd.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "xcommon.h"
#include "nls.h" /* _() */
void (*at_die)(void ) = NULL;
char *
xstrndup (const char *s, int n) {
char *t;
if (s == NULL)
die (EX_SOFTWARE, _("bug in xstrndup call"));
t = xmalloc(n+1);
strncpy(t,s,n);
t[n] = 0;
return t;
}
char *
xstrconcat2 (const char *s, const char *t) {
char *res;
if (!s) s = "";
if (!t) t = "";
res = xmalloc(strlen(s) + strlen(t) + 1);
strcpy(res, s);
strcat(res, t);
return res;
}
/* frees its first arg - typical use: s = xstrconcat3(s,t,u); */
char *
xstrconcat3 (const char *s, const char *t, const char *u) {
char *res;
if (!s) s = "";
if (!t) t = "";
if (!u) u = "";
res = xmalloc(strlen(s) + strlen(t) + strlen(u) + 1);
strcpy(res, s);
strcat(res, t);
strcat(res, u);
free((void *) s);
return res;
}
/* frees its first arg - typical use: s = xstrconcat4(s,t,u,v); */
char *
xstrconcat4 (const char *s, const char *t, const char *u, const char *v) {
char *res;
if (!s) s = "";
if (!t) t = "";
if (!u) u = "";
if (!v) v = "";
res = xmalloc(strlen(s) + strlen(t) + strlen(u) + strlen(v) + 1);
strcpy(res, s);
strcat(res, t);
strcat(res, u);
strcat(res, v);
free((void *) s);
return res;
}
/* Non-fatal error. Print message and return. */
/* (print the message in a single printf, in an attempt
to avoid mixing output of several threads) */
void
nfs_error (const char *fmt, ...) {
va_list args;
char *fmt2;
fmt2 = xstrconcat2 (fmt, "\n");
va_start (args, fmt);
vfprintf (stderr, fmt2, args);
va_end (args);
free (fmt2);
}
/* Make a canonical pathname from PATH. Returns a freshly malloced string.
It is up the *caller* to ensure that the PATH is sensible. i.e.
canonicalize ("/dev/fd0/.") returns "/dev/fd0" even though ``/dev/fd0/.''
is not a legal pathname for ``/dev/fd0''. Anything we cannot parse
we return unmodified. */
char *canonicalize (const char *path) {
char canonical[PATH_MAX+2];
if (path == NULL)
return NULL;
#if 1
if (streq(path, "none") ||
streq(path, "proc") ||
streq(path, "devpts"))
return xstrdup(path);
#endif
if (realpath (path, canonical))
return xstrdup(canonical);
return xstrdup(path);
}
/* Fatal error. Print message and exit. */
void
die(int err, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
fprintf(stderr, "\n");
va_end(args);
if (at_die)
(*at_die)();
exit(err);
}
static void
die_if_null(void *t) {
if (t == NULL)
die(EX_SYSERR, _("not enough memory"));
}
void *
xmalloc (size_t size) {
void *t;
if (size == 0)
return NULL;
t = malloc(size);
die_if_null(t);
return t;
}
void *
xrealloc (void *p, size_t size) {
void *t;
t = realloc(p, size);
die_if_null(t);
return t;
}
void
xfree(void *ptr)
{
free(ptr);
}
char *
xstrdup (const char *s) {
char *t;
if (s == NULL)
return NULL;
t = strdup(s);
die_if_null(t);
return t;
}
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