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Rev 3471 Rev 3536
Line 68... Line 68...
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    cli_errno = CL_EOK;
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    cli_errno = CL_EOK;
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    return (char *) memcpy(ret, s1, len);
70
    return (char *) memcpy(ret, s1, len);
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}
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}
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/*
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 * Take a previously allocated string (s1), re-size it to accept s2 and copy
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 * the contents of s2 into s1.
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 * Return -1 on failure, or the length of the copied string on success.
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 */
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int cli_redup(char **s1, const char *s2)
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{
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    size_t len = strlen(s2) + 1;
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    if (! len)
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        return -1;
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    *s1 = realloc(*s1, len);
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    if (*s1 == NULL) {
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        cli_errno = CL_ENOMEM;
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        return -1;
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    }
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    memset(*s1, 0, sizeof(*s1));
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    memcpy(*s1, s2, len);
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    cli_errno = CL_EOK;
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    return (int) len;
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}
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/* An asprintf() for formatting paths, similar to asprintf() but ensures
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 * the returned allocated string is <= PATH_MAX. On failure, an attempt
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 * is made to return the original string (if not null) unmodified.
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 *
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 * Returns: Length of the new string on success, 0 if the string was handed
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 * back unmodified, -1 on failure. On failure, cli_errno is set.
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 *
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 * We do not use POSIX_PATH_MAX, as it is typically much smaller than the
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 * PATH_MAX defined by the kernel.
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 *
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 * Use this like:
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 * if (1 > cli_psprintf(&char, "%s/%s", foo, bar)) {
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 *   cli_error(cli_errno, "Failed to format path");
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 *   stop_what_your_doing_as_your_out_of_memory();
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 * }
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 */
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int cli_psprintf(char **s1, const char *fmt, ...)
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{
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    va_list ap;
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    size_t needed, base = PATH_MAX + 1;
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    int skipped = 0;
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    char *orig = NULL;
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    char *tmp = (char *) malloc(base);
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    /* Don't even touch s1, not enough memory */
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    if (NULL == tmp) {
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        cli_errno = CL_ENOMEM;
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        return -1;
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    }
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    /* If re-allocating s1, save a copy in case we fail */
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    if (NULL != *s1)
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        orig = cli_strdup(*s1);
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    /* Print the string to tmp so we can determine the size that
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     * we actually need */
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    memset(tmp, 0, sizeof(tmp));
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    va_start(ap, fmt);
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    /* vsnprintf will return the # of bytes not written */
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    skipped = vsnprintf(tmp, base, fmt, ap);
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    va_end(ap);
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    /* realloc/alloc s1 to be just the size that we need */
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    needed = strlen(tmp) + 1;
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    *s1 = realloc(*s1, needed);
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    if (NULL == *s1) {
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        /* No string lived here previously, or we failed to
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         * make a copy of it, either way there's nothing we
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         * can do. */
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        if (NULL == *orig) {
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            cli_errno = CL_ENOMEM;
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            return -1;
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        }
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        /* We can't even allocate enough size to restore the
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         * saved copy, just give up */
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        *s1 = realloc(*s1, strlen(orig) + 1);
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        if (NULL == *s1) {
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            free(tmp);
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            free(orig);
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            cli_errno = CL_ENOMEM;
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            return -1;
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161
        }
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        /* Give the string back as we found it */
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        memset(*s1, 0, sizeof(*s1));
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        memcpy(*s1, orig, strlen(orig) + 1);
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        free(tmp);
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        free(orig);
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        cli_errno = CL_ENOMEM;
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        return 0;
-
 
169
    }
-
 
170
 
-
 
171
    /* Ok, great, we have enough room */
-
 
172
    memset(*s1, 0, sizeof(*s1));
-
 
173
    memcpy(*s1, tmp, needed);
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174
    free(tmp);
-
 
175
 
-
 
176
    /* Free tmp only if s1 was reallocated instead of allocated */
-
 
177
    if (NULL != orig)
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178
        free(orig);
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179
 
-
 
180
    if (skipped) {
-
 
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        /* s1 was bigger than PATH_MAX when expanded, however part
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         * of the string was printed. Tell the caller not to use it */
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        cli_errno = CL_ETOOBIG;
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        return -1;
-
 
185
    }
-
 
186
 
-
 
187
    /* Success! */
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188
    cli_errno = CL_EOK;
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189
    return (int) needed;
-
 
190
}
-
 
191
   
-
 
192
/* Ported from FBSD strtok.c 8.1 (Berkeley) 6/4/93 */
73
/* Ported from FBSD strtok.c 8.1 (Berkeley) 6/4/93 */
193
char * cli_strtok_r(char *s, const char *delim, char **last)
74
char * cli_strtok_r(char *s, const char *delim, char **last)
194
{
75
{
195
    char *spanp, *tok;
76
    char *spanp, *tok;
196
    int c, sc;
77
    int c, sc;
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    usr->cwd = getcwd(usr->cwd, PATH_MAX - 1);
152
    usr->cwd = getcwd(usr->cwd, PATH_MAX - 1);
272
 
153
 
273
    if (NULL == usr->cwd)
154
    if (NULL == usr->cwd)
274
        snprintf(usr->cwd, PATH_MAX, "(unknown)");
155
        snprintf(usr->cwd, PATH_MAX, "(unknown)");
275
 
156
 
276
    if (1 < cli_psprintf(&usr->prompt, "%s # ", usr->cwd)) {
157
    asprintf(&usr->prompt, "%s # ", usr->cwd);
277
        cli_error(cli_errno, "Failed to set prompt");
-
 
278
        return 1;
-
 
279
    }
-
 
280
 
158
 
281
    return 0;
159
    return 0;
282
}
160
}
283
 
161
 
284
 
162