55 lines
960 B
C
55 lines
960 B
C
#include <u.h>
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#include <libc.h>
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void
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main(int argc, char **argv)
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{
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int swapfd, cswfd;
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char buf[1024], *p;
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Dir *d;
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ARGBEGIN {
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} ARGEND;
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if(argc != 1){
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fprint(2, "Usage: swap file\n");
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exits("usage");
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}
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swapfd = -1;
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if(d = dirstat(p = *argv)){
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if(d->mode & DMDIR){
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p = getenv("sysname");
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if(p == 0)
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p = "swap";
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snprint(buf, sizeof buf, "%s/%sXXXXXXX", *argv, p);
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p = mktemp(buf);
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} else
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swapfd = open(p, ORDWR);
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}
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if(d == nil || (d->mode & DMDIR)){
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if((swapfd = create(p, ORDWR|ORCLOSE, 0600)) >= 0){
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Dir nd;
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nulldir(&nd);
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nd.mode = DMTMP|0600;
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dirfwstat(swapfd, &nd);
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}
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}
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if(swapfd < 0)
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sysfatal("%r");
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if(fd2path(swapfd, p = buf, sizeof buf))
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sysfatal("fd2path: %r");
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if(putenv("swap", p) < 0)
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sysfatal("putenv: %r");
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print("swap: %s\n", p);
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if((cswfd = open("/dev/swap", OWRITE)) < 0)
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sysfatal("open: %r");
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if(fprint(cswfd, "%d", swapfd) < 0)
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sysfatal("write: %r");
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exits(0);
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}
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