FreeCalypso > hg > freecalypso-tools

annotate libserial-orig/openport.c @ 492:ac48ed111d6a

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loadtools/scripts/compal.init: updated comments for new understanding
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 24 May 2019 06:15:02 +0000
parents cb1ba53a1106
children
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1 /*
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2 * This module implements the basic serial port opening operation.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/file.h>
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7 #include <sys/ioctl.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <unistd.h>
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11
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12 int target_fd;
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13
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14 open_serial_port(ttyport)
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15 char *ttyport;
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16 {
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17 target_fd = open(ttyport, O_RDWR|O_NONBLOCK);
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18 if (target_fd < 0) {
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19 perror(ttyport);
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20 exit(1);
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21 }
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22 ioctl(target_fd, TIOCEXCL);
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23 return 0;
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24 }