--- /dev/null
+/*
+ * Copyright (C) 1996-2000 Michael R. Elkins <me@cs.hmc.edu>
+ * Copyright (C) 1999-2000 Thomas Roessler <roessler@guug.de>
+ *
+ * This program is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * This program is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111, USA.
+ */
+
+/*
+ * This file used to contain some more functions, namely those
+ * which are now in muttlib.c. They have been removed, so we have
+ * some of our "standard" functions in external programs, too.
+ */
+
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <pwd.h>
+
+#include "lib.h"
+
+void mutt_nocurses_error (const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start (ap, fmt);
+ vfprintf (stderr, fmt, ap);
+ va_end (ap);
+ fputc ('\n', stderr);
+}
+
+void *safe_calloc (size_t nmemb, size_t size)
+{
+ void *p;
+
+ if (!nmemb || !size)
+ return NULL;
+ if (!(p = calloc (nmemb, size)))
+ {
+ mutt_error _("Out of memory!");
+ sleep (1);
+ mutt_exit (1);
+ }
+ return p;
+}
+
+void *safe_malloc (size_t siz)
+{
+ void *p;
+
+ if (siz == 0)
+ return 0;
+ if ((p = (void *) malloc (siz)) == 0) /* __MEM_CHECKED__ */
+ {
+ mutt_error _("Out of memory!");
+ sleep (1);
+ mutt_exit (1);
+ }
+ return (p);
+}
+
+void safe_realloc (void *p2, size_t siz)
+{
+ void **p = (void **)p2;
+ void *r;
+
+ if (siz == 0)
+ {
+ if (*p)
+ {
+ free (*p); /* __MEM_CHECKED__ */
+ *p = NULL;
+ }
+ return;
+ }
+
+ if (*p)
+ r = (void *) realloc (*p, siz); /* __MEM_CHECKED__ */
+ else
+ {
+ /* realloc(NULL, nbytes) doesn't seem to work under SunOS 4.1.x --- __MEM_CHECKED__ */
+ r = (void *) malloc (siz); /* __MEM_CHECKED__ */
+ }
+
+ if (!r)
+ {
+ mutt_error _("Out of memory!");
+ sleep (1);
+ mutt_exit (1);
+ }
+
+ *p = r;
+}
+
+void safe_free (void *p2)
+{
+ void **p = (void **)p2;
+ if (*p)
+ {
+ free (*p); /* __MEM_CHECKED__ */
+ *p = 0;
+ }
+}
+
+int safe_fclose (FILE **f)
+{
+ int r = 0;
+
+ if (*f)
+ r = fclose (*f);
+
+ *f = NULL;
+ return r;
+}
+
+char *safe_strdup (const char *s)
+{
+ char *p;
+ size_t l;
+
+ if (!s || !*s)
+ return 0;
+ l = strlen (s) + 1;
+ p = (char *)safe_malloc (l);
+ memcpy (p, s, l);
+ return (p);
+}
+
+void mutt_str_replace (char **p, const char *s)
+{
+ safe_free (p);
+ *p = safe_strdup (s);
+}
+
+void mutt_str_adjust (char **p)
+{
+ if (!p || !*p) return;
+ safe_realloc ((void **) p, strlen (*p) + 1);
+}
+
+/* convert all characters in the string to lowercase */
+char *mutt_strlower (char *s)
+{
+ char *p = s;
+
+ while (*p)
+ {
+ *p = tolower (*p);
+ p++;
+ }
+
+ return (s);
+}
+
+void mutt_unlink (const char *s)
+{
+ FILE *f;
+ struct stat sb;
+ char buf[2048];
+
+ if (stat (s, &sb) == 0)
+ {
+ if ((f = fopen (s, "r+")))
+ {
+ unlink (s);
+ memset (buf, 0, sizeof (buf));
+ while (sb.st_size > 0)
+ {
+ fwrite (buf, 1, sizeof (buf), f);
+ sb.st_size -= sizeof (buf);
+ }
+ fclose (f);
+ }
+ }
+}
+
+int mutt_copy_bytes (FILE *in, FILE *out, size_t size)
+{
+ char buf[2048];
+ size_t chunk;
+
+ while (size > 0)
+ {
+ chunk = (size > sizeof (buf)) ? sizeof (buf) : size;
+ if ((chunk = fread (buf, 1, chunk, in)) < 1)
+ break;
+ if (fwrite (buf, 1, chunk, out) != chunk)
+ {
+ /* dprint (1, (debugfile, "mutt_copy_bytes(): fwrite() returned short byte count\n")); */
+ return (-1);
+ }
+ size -= chunk;
+ }
+
+ return 0;
+}
+
+int mutt_copy_stream (FILE *fin, FILE *fout)
+{
+ size_t l;
+ char buf[LONG_STRING];
+
+ while ((l = fread (buf, 1, sizeof (buf), fin)) > 0)
+ {
+ if (fwrite (buf, 1, l, fout) != l)
+ return (-1);
+ }
+
+ return 0;
+}
+
+static int
+compare_stat (struct stat *osb, struct stat *nsb)
+{
+ if (osb->st_dev != nsb->st_dev || osb->st_ino != nsb->st_ino ||
+ osb->st_rdev != nsb->st_rdev)
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+int safe_symlink(const char *oldpath, const char *newpath)
+{
+ struct stat osb, nsb;
+
+ if(!oldpath || !newpath)
+ return -1;
+
+ if(unlink(newpath) == -1 && errno != ENOENT)
+ return -1;
+
+ if (oldpath[0] == '/')
+ {
+ if (symlink (oldpath, newpath) == -1)
+ return -1;
+ }
+ else
+ {
+ char abs_oldpath[_POSIX_PATH_MAX];
+
+ if ((getcwd (abs_oldpath, sizeof abs_oldpath) == NULL) ||
+ (strlen (abs_oldpath) + 1 + strlen (oldpath) + 1 > sizeof abs_oldpath))
+ return -1;
+
+ strcat (abs_oldpath, "/"); /* __STRCAT_CHECKED__ */
+ strcat (abs_oldpath, oldpath); /* __STRCAT_CHECKED__ */
+ if (symlink (abs_oldpath, newpath) == -1)
+ return -1;
+ }
+
+ if(stat(oldpath, &osb) == -1 || stat(newpath, &nsb) == -1
+ || compare_stat(&osb, &nsb) == -1)
+ {
+ unlink(newpath);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * This function is supposed to do nfs-safe renaming of files.
+ *
+ * Warning: We don't check whether src and target are equal.
+ */
+
+int safe_rename (const char *src, const char *target)
+{
+ struct stat ssb, tsb;
+
+ if (!src || !target)
+ return -1;
+
+ if (link (src, target) != 0)
+ {
+
+ /*
+ * Coda does not allow cross-directory links, but tells
+ * us it's a cross-filesystem linking attempt.
+ *
+ * However, the Coda rename call is allegedly safe to use.
+ *
+ * With other file systems, rename should just fail when
+ * the files reside on different file systems, so it's safe
+ * to try it here.
+ *
+ */
+
+ if (errno == EXDEV)
+ return rename (src, target);
+
+ return -1;
+ }
+
+ /*
+ * Stat both links and check if they are equal.
+ */
+
+ if (stat (src, &ssb) == -1)
+ {
+ return -1;
+ }
+
+ if (stat (target, &tsb) == -1)
+ {
+ return -1;
+ }
+
+ /*
+ * pretend that the link failed because the target file
+ * did already exist.
+ */
+
+ if (compare_stat (&ssb, &tsb) == -1)
+ {
+ errno = EEXIST;
+ return -1;
+ }
+
+ /*
+ * Unlink the original link. Should we really ignore the return
+ * value here? XXX
+ */
+
+ unlink (src);
+
+ return 0;
+}
+
+int safe_open (const char *path, int flags)
+{
+ struct stat osb, nsb;
+ int fd;
+
+ if ((fd = open (path, flags, 0600)) < 0)
+ return fd;
+
+ /* make sure the file is not symlink */
+ if (lstat (path, &osb) < 0 || fstat (fd, &nsb) < 0 ||
+ compare_stat(&osb, &nsb) == -1)
+ {
+/* dprint (1, (debugfile, "safe_open(): %s is a symlink!\n", path)); */
+ close (fd);
+ return (-1);
+ }
+
+ return (fd);
+}
+
+/* when opening files for writing, make sure the file doesn't already exist
+ * to avoid race conditions.
+ */
+FILE *safe_fopen (const char *path, const char *mode)
+{
+ if (mode[0] == 'w')
+ {
+ int fd;
+ int flags = O_CREAT | O_EXCL;
+
+#ifdef O_NOFOLLOW
+ flags |= O_NOFOLLOW;
+#endif
+
+ if (mode[1] == '+')
+ flags |= O_RDWR;
+ else
+ flags |= O_WRONLY;
+
+ if ((fd = safe_open (path, flags)) < 0)
+ return (NULL);
+
+ return (fdopen (fd, mode));
+ }
+ else
+ return (fopen (path, mode));
+}
+
+static char safe_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+@{}._-:%/";
+
+void mutt_sanitize_filename (char *f, short slash)
+{
+ if (!f) return;
+
+ for (; *f; f++)
+ {
+ if ((slash && *f == '/') || !strchr (safe_chars, *f))
+ *f = '_';
+ }
+}
+
+/* these characters must be escaped in regular expressions */
+
+static char rx_special_chars[] = "^.[$()|*+?{\\";
+
+int mutt_rx_sanitize_string (char *dest, size_t destlen, const char *src)
+{
+ while (*src && --destlen > 2)
+ {
+ if (strchr (rx_special_chars, *src))
+ {
+ *dest++ = '\\';
+ destlen--;
+ }
+ *dest++ = *src++;
+ }
+
+ *dest = '\0';
+
+ if (*src)
+ return -1;
+ else
+ return 0;
+}
+
+/* Read a line from ``fp'' into the dynamically allocated ``s'',
+ * increasing ``s'' if necessary. The ending "\n" or "\r\n" is removed.
+ * If a line ends with "\", this char and the linefeed is removed,
+ * and the next line is read too.
+ */
+char *mutt_read_line (char *s, size_t *size, FILE *fp, int *line)
+{
+ size_t offset = 0;
+ char *ch;
+
+ if (!s)
+ {
+ s = safe_malloc (STRING);
+ *size = STRING;
+ }
+
+ FOREVER
+ {
+ if (fgets (s + offset, *size - offset, fp) == NULL)
+ {
+ safe_free (&s);
+ return NULL;
+ }
+ if ((ch = strchr (s + offset, '\n')) != NULL)
+ {
+ (*line)++;
+ *ch = 0;
+ if (ch > s && *(ch - 1) == '\r')
+ *--ch = 0;
+ if (ch == s || *(ch - 1) != '\\')
+ return s;
+ offset = ch - s - 1;
+ }
+ else
+ {
+ int c;
+ c = getc (fp); /* This is kind of a hack. We want to know if the
+ char at the current point in the input stream is EOF.
+ feof() will only tell us if we've already hit EOF, not
+ if the next character is EOF. So, we need to read in
+ the next character and manually check if it is EOF. */
+ if (c == EOF)
+ {
+ /* The last line of fp isn't \n terminated */
+ (*line)++;
+ return s;
+ }
+ else
+ {
+ ungetc (c, fp); /* undo our dammage */
+ /* There wasn't room for the line -- increase ``s'' */
+ offset = *size - 1; /* overwrite the terminating 0 */
+ *size += STRING;
+ safe_realloc (&s, *size);
+ }
+ }
+ }
+}
+
+char *
+mutt_substrcpy (char *dest, const char *beg, const char *end, size_t destlen)
+{
+ size_t len;
+
+ len = end - beg;
+ if (len > destlen - 1)
+ len = destlen - 1;
+ memcpy (dest, beg, len);
+ dest[len] = 0;
+ return dest;
+}
+
+char *mutt_substrdup (const char *begin, const char *end)
+{
+ size_t len;
+ char *p;
+
+ if (end)
+ len = end - begin;
+ else
+ len = strlen (begin);
+
+ p = safe_malloc (len + 1);
+ memcpy (p, begin, len);
+ p[len] = 0;
+ return p;
+}
+
+/* prepare a file name to survive the shell's quoting rules.
+ * From the Unix programming FAQ by way of Liviu.
+ */
+
+size_t mutt_quote_filename (char *d, size_t l, const char *f)
+{
+ size_t i, j = 0;
+
+ if(!f)
+ {
+ *d = '\0';
+ return 0;
+ }
+
+ /* leave some space for the trailing characters. */
+ l -= 6;
+
+ d[j++] = '\'';
+
+ for(i = 0; j < l && f[i]; i++)
+ {
+ if(f[i] == '\'' || f[i] == '`')
+ {
+ d[j++] = '\'';
+ d[j++] = '\\';
+ d[j++] = f[i];
+ d[j++] = '\'';
+ }
+ else
+ d[j++] = f[i];
+ }
+
+ d[j++] = '\'';
+ d[j] = '\0';
+
+ return j;
+}
+
+/* NULL-pointer aware string comparison functions */
+
+int mutt_strcmp(const char *a, const char *b)
+{
+ return strcmp(NONULL(a), NONULL(b));
+}
+
+int mutt_strcasecmp(const char *a, const char *b)
+{
+ return strcasecmp(NONULL(a), NONULL(b));
+}
+
+int mutt_strncmp(const char *a, const char *b, size_t l)
+{
+ return strncmp(NONULL(a), NONULL(b), l);
+}
+
+int mutt_strncasecmp(const char *a, const char *b, size_t l)
+{
+ return strncasecmp(NONULL(a), NONULL(b), l);
+}
+
+size_t mutt_strlen(const char *a)
+{
+ return a ? strlen (a) : 0;
+}
+
+const char *mutt_stristr (const char *haystack, const char *needle)
+{
+ const char *p, *q;
+
+ if (!haystack)
+ return NULL;
+ if (!needle)
+ return (haystack);
+
+ while (*(p = haystack))
+ {
+ for (q = needle; *p && *q && tolower (*p) == tolower (*q); p++, q++)
+ ;
+ if (!*q)
+ return (haystack);
+ haystack++;
+ }
+ return NULL;
+}
+
+char *mutt_skip_whitespace (char *p)
+{
+ SKIPWS (p);
+ return p;
+}
+
+void mutt_remove_trailing_ws (char *s)
+{
+ char *p;
+
+ for (p = s + mutt_strlen (s) - 1 ; p >= s && ISSPACE (*p) ; p--)
+ *p = 0;
+}
projects / pgp-tools.git / blobdiff