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Annotation of embedaddon/sudo/compat/getline.c, revision 1.1.1.3

1.1       misho       1: /*
1.1.1.3 ! misho       2:  * Copyright (c) 2009-2010, 2012-2013 Todd C. Miller <Todd.Miller@courtesan.com>
1.1       misho       3:  *
                      4:  * Permission to use, copy, modify, and distribute this software for any
                      5:  * purpose with or without fee is hereby granted, provided that the above
                      6:  * copyright notice and this permission notice appear in all copies.
                      7:  *
                      8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                      9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     15:  */
                     16: 
                     17: #include <config.h>
                     18: 
1.1.1.3 ! misho      19: #ifndef HAVE_GETLINE
        !            20: 
1.1       misho      21: #include <sys/types.h>
                     22: 
                     23: #include <stdio.h>
                     24: #ifdef STDC_HEADERS
                     25: # include <stdlib.h>
                     26: # include <stddef.h>
                     27: #else
                     28: # ifdef HAVE_STDLIB_H
                     29: #  include <stdlib.h>
                     30: # endif
                     31: #endif /* STDC_HEADERS */
                     32: #ifdef HAVE_STRING_H
                     33: # include <string.h>
                     34: #endif /* HAVE_STRING_H */
                     35: #ifdef HAVE_STRINGS_H
                     36: # include <strings.h>
                     37: #endif /* HAVE_STRINGS_H */
                     38: #include <limits.h>
                     39: 
                     40: #include "missing.h"
                     41: 
                     42: #ifndef LINE_MAX
                     43: # define LINE_MAX 2048
                     44: #endif
                     45: 
                     46: #ifdef HAVE_FGETLN
                     47: ssize_t
                     48: getline(char **bufp, size_t *bufsizep, FILE *fp)
                     49: {
                     50:     char *buf, *cp;
                     51:     size_t bufsize;
                     52:     size_t len;
                     53: 
                     54:     buf = fgetln(fp, &len);
                     55:     if (buf) {
                     56:        bufsize = *bufp ? *bufsizep : 0;
1.1.1.2   misho      57:        if (bufsize == 0 || bufsize - 1 < len) {
1.1       misho      58:            bufsize = len + 1;
                     59:            cp = *bufp ? realloc(*bufp, bufsize) : malloc(bufsize);
                     60:            if (cp == NULL)
                     61:                return -1;
                     62:            *bufp = cp;
                     63:            *bufsizep = bufsize;
                     64:        }
                     65:        memcpy(*bufp, buf, len);
                     66:        (*bufp)[len] = '\0';
                     67:     }
                     68:     return buf ? len : -1;
                     69: }
                     70: #else
                     71: ssize_t
                     72: getline(char **bufp, size_t *bufsizep, FILE *fp)
                     73: {
                     74:     char *buf, *cp;
                     75:     size_t bufsize;
                     76:     ssize_t len = 0;
                     77: 
                     78:     buf = *bufp;
                     79:     bufsize = *bufsizep;
                     80:     if (buf == NULL || bufsize == 0) {
                     81:        bufsize = LINE_MAX;
                     82:        cp = buf ? realloc(buf, bufsize) : malloc(bufsize);
                     83:        if (cp == NULL)
                     84:            return -1;
                     85:        buf = cp;
                     86:     }
                     87: 
                     88:     for (;;) {
                     89:        if (fgets(buf + len, bufsize - len, fp) == NULL) {
                     90:            len = -1;
                     91:            break;
                     92:        }
                     93:        len = strlen(buf);
                     94:        if (!len || buf[len - 1] == '\n' || feof(fp))
                     95:            break;
                     96:        bufsize *= 2;
                     97:        cp = realloc(buf, bufsize);
                     98:        if (cp == NULL)
                     99:            return -1;
                    100:        buf = cp;
                    101:     }
                    102:     *bufp = buf;
                    103:     *bufsizep = bufsize;
                    104:     return len;
                    105: }
1.1.1.3 ! misho     106: #endif /* HAVE_FGETLN */
        !           107: #endif /* HAVE_GETLINE */