Codice

394 volume VI os16
Sorgenti della libreria generale 395
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4090033 | return (seconds - slept);
4090034 | }
4090035 | else
4090036 | {
4090037 | return (0);
4090038 | }
4090039 |}
105.17.34 lib/unistd/ttyname.c
Si veda la sezione 98.124.
4100001 |#include
4100002 |#include
4100003 |#include
4100004 |#include
4100005 |#include
4100006 |#include
4100007 |//----------------------------------------------------------------------
4100008 |char *
4100009 |ttyname (int fdn)
4100010 |{
4100011 | int dev_minor;
4100012 | struct stat file_status;
4100013 | static char name[PATH_MAX];
4100014 | //
4100015 | // Verify to have valid input data.
4100016 | //
4100017 | if (fdn < 0)
4100018 | {
4100019 | errset (EBADF);
4100020 | return (NULL);
4100021 | }
4100022 | //
4100023 | // Verify the file descriptor.
4100024 | //
4100025 | if (fstat (fdn, &file_status) == 0)
4100026 | {
4100027 | if (major (file_status.st_rdev) == DEV_CONSOLE_MAJOR)
4100028 | {
4100029 | dev_minor = minor (file_status.st_rdev);
4100030 | //
4100031 | // If minor is equal to 0xFF, it is ‘/dev/console’.
4100032 | //
4100033 | if (dev_minor < 0xFF)
4100034 | {
4100035 | sprintf (name, "/dev/console%i", dev_minor);
4100036 | }
4100037 | else
4100038 | {
4100039 | strcpy (name, "/dev/console");
4100040 | }
4100041 | return (name);
4100042 | }
4100043 | else if (file_status.st_rdev == DEV_TTY)
4100044 | {
4100045 | strcpy (name, "/dev/tty");
4100046 | return (name);
4100047 | }
4100048 | else
4100049 | {
4100050 | errset (ENOTTY);
4100051 | return (NULL);
4100052 | }
4100053 | }
4100054 | else
4100055 | {
4100056 | errset (errno);
4100057 | return (NULL);
4100058 | }
4100059 |}
105.17.35 lib/unistd/unlink.c
Si veda la sezione 97.42.
4110001 |#include
4110002 |#include
4110003 |#include
4110004 |#include
4110005 |#include
4110006 |#include
4110007 |//----------------------------------------------------------------------
4110008 |int
4110009 |unlink (const char *path)
4110010 |{
4110011 | sysmsg_unlink_t msg;
4110012 | //
4110013 | strncpy (msg.path, path, PATH_MAX);
4110014 | //
4110015 | sys (SYS_UNLINK, &msg, (sizeof msg));
4110016 | //
4110017 | errno = msg.errno;
4110018 | errln = msg.errln;
4110019 | strncpy (errfn, msg.errfn, PATH_MAX);
4110020 | return (msg.ret);
4110021 |}
4120012 | //
4120013 | // Reduce size of write if necessary.
4120014 | //
4120015 | if (count > BUFSIZ)
4120016 | {
4120017 | count = BUFSIZ;
4120018 | }
4120019 | //
4120020 | // Fill the message.
4120021 | //
4120022 | msg.fdn = fdn;
4120023 | msg.count = count;
4120024 | memcpy (msg.buffer, buffer, count);
4120025 | //
4120026 | // Syscall.
4120027 | //
4120028 | sys (SYS_WRITE, &msg, (sizeof msg));
4120029 | //
4120030 | // Check result and return.
4120031 | //
4120032 | if (msg.ret < 0)
4120033 | {
4120034 | //
4120035 | // No valid read, no change inside the buffer.
4120036 | //
4120037 | errno = msg.errno;
4120038 | errln = msg.errln;
4120039 | strncpy (errfn, msg.errfn, PATH_MAX);
4120040 | return (msg.ret);
4120041 | }
4120042 | //
4120043 | if (msg.ret > count)
4120044 | {
4120045 | //
4120046 | // A strange value was returned. Considering it a read error.
4120047 | //
4120048 | errset (EIO); // I/O error.
4120049 | return (-1);
4120050 | }
4120051 | //
4120052 | // A valid write return.
4120053 | //
4120054 | return (msg.ret);
4120055 |}
105.18 os16: «lib/utime.h»
Si veda la sezione 101.2.
4130001 |#ifndef _UTIME_H
4130002 |#define _UTIME_H 1
4130003 |
4130004 |#include
4130005 |#include
4130006 |#include // time_t
4130007 |
4130008 |//----------------------------------------------------------------------
4130009 |struct utimbuf {
4130010 | time_t actime;
4130011 | time_t modtime;
4130012 |};
4130013 |//----------------------------------------------------------------------
4130014 |int utime (const char *path, const struct utimbuf *times);
4130015 |//----------------------------------------------------------------------
4130016 |
4130017 |#endif
105.18.1 lib/utime/utime.c
Si veda la sezione 101.2.
4140001 |#include
4140002 |#include
4140003 |//----------------------------------------------------------------------
4140004 |int
4140005 |utime (const char *path, const struct utimbuf *times)
4140006 |{
4140007 | //
4140008 | // Currently not implemented.
4140009 | //
4140010 | return (0);
4140011 |}
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105.17.36 lib/unistd/write.c
Si veda la sezione 97.44.
4120001 |#include
4120002 |#include
4120003 |#include
4120004 |#include
4120005 |#include
4120006 |#include
4120007 |//----------------------------------------------------------------------
4120008 |ssize_t
4120009 |write (int fdn, const void *buffer, size_t count)
4120010 |{
4120011 | sysmsg_write_t msg;