28 lines
489 B
C
Executable file
28 lines
489 B
C
Executable file
/* gethostname(2) system call emulation */
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#include <sys/types.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <net/gen/netdb.h>
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#define HOSTNAME_FILE "/etc/hostname.file"
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int gethostname(char *buf, size_t len)
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{
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int fd;
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int r;
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char *nl;
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if ((fd= open(HOSTNAME_FILE, O_RDONLY)) < 0) return -1;
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r= read(fd, buf, len);
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close(fd);
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if (r == -1) return -1;
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buf[len-1]= '\0';
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if ((nl= strchr(buf, '\n')) != NULL) *nl= '\0';
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return 0;
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}
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