1/*
| 1/*
|
2 * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
| 2 * Copyright (c) 2000-2001, 2013 Sendmail, Inc. and its suppliers.
|
3 * All rights reserved.
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek.
9 *
10 * By using this file, you agree to the terms and conditions set
11 * forth in the LICENSE file which can be found at the top level of
12 * the sendmail distribution.
13 */
14
15#include <sm/gen.h>
| 3 * All rights reserved.
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek.
9 *
10 * By using this file, you agree to the terms and conditions set
11 * forth in the LICENSE file which can be found at the top level of
12 * the sendmail distribution.
13 */
14
15#include <sm/gen.h>
|
16SM_RCSID("@(#)$Id: fget.c,v 1.24 2001/09/11 04:04:48 gshapiro Exp $")
| 16SM_RCSID("@(#)$Id: fget.c,v 1.25 2013/03/12 15:24:50 ca Exp $")
|
17#include <stdlib.h>
18#include <string.h>
19#include <sm/io.h>
20#include <sm/assert.h>
21#include "local.h"
22
23/*
24** SM_IO_FGETS -- get a string from a file
25**
26** Read at most n-1 characters from the given file.
27** Stop when a newline has been read, or the count ('n') runs out.
28**
29** Parameters:
30** fp -- the file to read from
31** timeout -- time to complete reading the string in milliseconds
32** buf -- buffer to place read string in
33** n -- size of 'buf'
34**
35** Returns:
| 17#include <stdlib.h>
18#include <string.h>
19#include <sm/io.h>
20#include <sm/assert.h>
21#include "local.h"
22
23/*
24** SM_IO_FGETS -- get a string from a file
25**
26** Read at most n-1 characters from the given file.
27** Stop when a newline has been read, or the count ('n') runs out.
28**
29** Parameters:
30** fp -- the file to read from
31** timeout -- time to complete reading the string in milliseconds
32** buf -- buffer to place read string in
33** n -- size of 'buf'
34**
35** Returns:
|
36** success: returns value of 'buf'
37** failure: NULL (no characters were read)
38** timeout: NULL and errno set to EAGAIN
| 36** success: number of characters
37** failure: -1
38** timeout: -1 and errno set to EAGAIN
|
39**
40** Side Effects:
41** may move the file pointer
42*/
43
| 39**
40** Side Effects:
41** may move the file pointer
42*/
43
|
44char *
| 44int
|
45sm_io_fgets(fp, timeout, buf, n)
46 register SM_FILE_T *fp;
47 int timeout;
48 char *buf;
49 register int n;
50{
| 45sm_io_fgets(fp, timeout, buf, n)
46 register SM_FILE_T *fp;
47 int timeout;
48 char *buf;
49 register int n;
50{
|
51 register int len;
52 register char *s;
53 register unsigned char *p, *t;
| 51 int len, r;
52 char *s;
53 unsigned char *p, *t;
|
54
55 SM_REQUIRE_ISA(fp, SmFileMagic);
56 if (n <= 0) /* sanity check */
| 54
55 SM_REQUIRE_ISA(fp, SmFileMagic);
56 if (n <= 0) /* sanity check */
|
57 return NULL;
| 57 return -1;
|
58
59 s = buf;
60 n--; /* leave space for NUL */
| 58
59 s = buf;
60 n--; /* leave space for NUL */
|
| 61 r = 0;
|
61 while (n > 0)
62 {
63 /* If the buffer is empty, refill it. */
64 if ((len = fp->f_r) <= 0)
65 {
66
67 /*
68 ** Timeout is only passed if we can't get the data
69 ** from the buffer (which is counted as immediately).
70 */
71
72 if (sm_refill(fp, timeout) != 0)
73 {
74 /* EOF/error: stop with partial or no line */
75 if (s == buf)
| 62 while (n > 0)
63 {
64 /* If the buffer is empty, refill it. */
65 if ((len = fp->f_r) <= 0)
66 {
67
68 /*
69 ** Timeout is only passed if we can't get the data
70 ** from the buffer (which is counted as immediately).
71 */
72
73 if (sm_refill(fp, timeout) != 0)
74 {
75 /* EOF/error: stop with partial or no line */
76 if (s == buf)
|
76 return NULL;
| 77 return -1;
|
77 break;
78 }
79 len = fp->f_r;
80 }
81 p = fp->f_p;
82
83 /*
84 ** Scan through at most n bytes of the current buffer,
85 ** looking for '\n'. If found, copy up to and including
86 ** newline, and stop. Otherwise, copy entire chunk
87 ** and loop.
88 */
89
90 if (len > n)
91 len = n;
92 t = (unsigned char *) memchr((void *) p, '\n', len);
93 if (t != NULL)
94 {
95 len = ++t - p;
| 78 break;
79 }
80 len = fp->f_r;
81 }
82 p = fp->f_p;
83
84 /*
85 ** Scan through at most n bytes of the current buffer,
86 ** looking for '\n'. If found, copy up to and including
87 ** newline, and stop. Otherwise, copy entire chunk
88 ** and loop.
89 */
90
91 if (len > n)
92 len = n;
93 t = (unsigned char *) memchr((void *) p, '\n', len);
94 if (t != NULL)
95 {
96 len = ++t - p;
|
| 97 r += len;
|
96 fp->f_r -= len;
97 fp->f_p = t;
98 (void) memcpy((void *) s, (void *) p, len);
99 s[len] = 0;
| 98 fp->f_r -= len;
99 fp->f_p = t;
100 (void) memcpy((void *) s, (void *) p, len);
101 s[len] = 0;
|
100 return buf;
| 102 return r;
|
101 }
102 fp->f_r -= len;
103 fp->f_p += len;
104 (void) memcpy((void *) s, (void *) p, len);
105 s += len;
| 103 }
104 fp->f_r -= len;
105 fp->f_p += len;
106 (void) memcpy((void *) s, (void *) p, len);
107 s += len;
|
| 108 r += len;
|
106 n -= len;
107 }
108 *s = 0;
| 109 n -= len;
110 }
111 *s = 0;
|
109 return buf;
| 112 return r;
|
110}
| 113}
|