FreeCalypso > hg > themwi-system-sw
annotate libutil/sockinit.c @ 197:73bbe7da45cd
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author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 26 Mar 2023 15:29:48 -0800 |
parents | dbc0a8677b69 |
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libutil: import from ThemWi1
Mychaela Falconia <falcon@freecalypso.org>
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1 /* |
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2 * This library module implements a function that helps initialize |
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3 * sockaddr for bind or connect operations on UNIX domain sockets. |
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4 * |
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5 * Back when I programmed under 4.3BSD UNIX, this operation was simple |
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6 * and straightforward - but under "modern" Unixes, it appears to be |
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7 * a complex affair, given the messy code (originally copied from |
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8 * Osmocom) that appears in FreeCalypso host tools for the rvinterf |
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9 * local socket interface. Hence I am factoring that mess out into |
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10 * its own library function this time around. |
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11 */ |
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12 |
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13 #include <sys/types.h> |
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14 #include <sys/socket.h> |
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15 #include <sys/un.h> |
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16 #include <string.h> |
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17 #include <strings.h> |
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18 |
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19 void |
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20 fill_sockaddr_un(pathname, sunp, lenp) |
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21 char *pathname; |
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22 struct sockaddr_un *sunp; |
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23 unsigned *lenp; |
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24 { |
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25 /* local socket binding voodoo copied from osmocon */ |
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26 sunp->sun_family = AF_UNIX; |
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27 strncpy(sunp->sun_path, pathname, sizeof(sunp->sun_path)); |
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28 sunp->sun_path[sizeof(sunp->sun_path) - 1] = '\0'; |
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29 /* we use the same magic that X11 uses in Xtranssock.c for |
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30 * calculating the proper length of the sockaddr */ |
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31 #if defined(BSD44SOCKETS) || defined(__UNIXWARE__) |
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32 sunp->sun_len = strlen(sunp->sun_path); |
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33 #endif |
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34 #if defined(BSD44SOCKETS) || defined(SUN_LEN) |
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35 *lenp = SUN_LEN(sunp); |
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36 #else |
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37 *lenp = strlen(sunp->sun_path) + |
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38 offsetof(struct sockaddr_un, sun_path) + 1; |
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39 #endif |
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40 } |