Lines Matching +full:write +full:- +full:to +full:- +full:read

1 // SPDX-License-Identifier: GPL-2.0-only
10 /* Test Write
12  * A wrapper for write(2), that automatically handles the following
16  *   + Write of less than requested amount
17  *   + Non-block return (EAGAIN)
19  * For each of the above, an additional write is performed to automatically
21  * There are also many cases where write(2) can return an unexpected
24  * Note, for function signature compatibility with write(2), this function
26  * to the number of requested bytes.  All other conditions in this and
27  * future enhancements to this function either automatically issue another
28  * write(2) or cause a TEST_ASSERT failure.
31  *  fd    - Opened file descriptor to file to be written.
32  *  count - Number of bytes to write.
35  *  buf   - Starting address of data to be written.
49 	 * write(2) manpage for details.  in test_write()
54 		rc = write(fd, ptr, num_left);  in test_write()
57 		case -1:  in test_write()
59 				    "Unexpected write failure,\n"  in test_write()
70 			TEST_ASSERT(rc >= 0, "Unexpected ret from write,\n"  in test_write()
73 			num_left -= rc;  in test_write()
82 /* Test Read
84  * A wrapper for read(2), that automatically handles the following
88  *   + Read of less than requested amount
89  *   + Non-block return (EAGAIN)
91  * For each of the above, an additional read is performed to automatically
93  * There are also many cases where read(2) can return an unexpected
96  * contains at least the number of requested bytes to be read.  A TEST_ASSERT
97  * failure is produced if an End-Of-File condition occurs, before all the
98  * data is read.  It is the callers responsibility to assure that sufficient
101  * Note, for function signature compatibility with read(2), this function
102  * returns the number of bytes read, but that value will always be equal
103  * to the number of requested bytes.  All other conditions in this and
104  * future enhancements to this function either automatically issue another
105  * read(2) or cause a TEST_ASSERT failure.
108  *  fd    - Opened file descriptor to file to be read.
109  *  count - Number of bytes to read.
112  *  buf   - Starting address of where to write the bytes read.
115  *  On success, number of bytes read.
126 	 * read(2) manpage for details.  in test_read()
131 		rc = read(fd, ptr, num_left);  in test_read()
134 		case -1:  in test_read()
136 				    "Unexpected read failure,\n"  in test_read()
147 			TEST_ASSERT(rc > 0, "Unexpected ret from read,\n"  in test_read()
150 			num_left -= rc;  in test_read()