b3a20a96eb
Programs that want to background themselves now need to define threadmaybackground returning 1. This avoids a confusing (to people and debuggers) extra parent process for all the threaded programs that will never want to background themselves.
150 lines
2.7 KiB
C
150 lines
2.7 KiB
C
#include "stdinc.h"
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#include <ctype.h>
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#include "9.h"
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int Dflag;
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int mempcnt; /* for 9fsys.c */
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char* none = "none";
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char* foptname = "/none/such";
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static void
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usage(void)
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{
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fprint(2, "usage: %s [-Dt] [-c cmd] [-f partition] [-m %%]\n", argv0);
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threadexitsall("usage");
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}
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static void
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readCmdPart(char *file, char ***pcmd, int *pncmd)
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{
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char buf[1024+1], *f[1024];
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char tbuf[1024];
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int nf;
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int i, fd, n;
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char **cmd, *p;
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int ncmd;
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cmd = *pcmd;
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ncmd = *pncmd;
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if((fd = open(file, OREAD)) < 0)
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sysfatal("open %s: %r", file);
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if(seek(fd, 127*1024, 0) != 127*1024)
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sysfatal("seek %s 127kB: %r", file);
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n = readn(fd, buf, sizeof buf-1);
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if(n == 0)
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sysfatal("short read of %s at 127kB", file);
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if(n < 0)
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sysfatal("read %s: %r", file);
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buf[n] = 0;
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if(memcmp(buf, "fossil config\n", 6+1+6+1) != 0)
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sysfatal("bad config magic in %s", file);
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nf = getfields(buf+6+1+6+1, f, nelem(f), 1, "\n");
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for(i=0; i<nf; i++){
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if(f[i][0] == '#')
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continue;
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cmd = vtrealloc(cmd, (ncmd+1)*sizeof(char*));
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/* expand argument '*' to mean current file */
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if((p = strchr(f[i], '*')) && (p==f[i]||isspace(p[-1])) && (p[1]==0||isspace(p[1]))){
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memmove(tbuf, f[i], p-f[i]);
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strecpy(tbuf+(p-f[i]), tbuf+sizeof tbuf, file);
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strecpy(tbuf+strlen(tbuf), tbuf+sizeof tbuf, p+1);
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f[i] = tbuf;
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}
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cmd[ncmd++] = vtstrdup(f[i]);
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}
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close(fd);
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*pcmd = cmd;
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*pncmd = ncmd;
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}
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int
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threadmaybackground(void)
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{
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return 1;
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}
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void
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threadmain(int argc, char* argv[])
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{
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char **cmd, *p;
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int i, ncmd, tflag;
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fmtinstall('D', dirfmt);
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fmtinstall('F', fcallfmt);
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fmtinstall('M', dirmodefmt);
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quotefmtinstall();
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/*
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* Insulate from the invoker's environment.
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*/
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#ifdef PLAN9PORT
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if(rfork(RFNAMEG) < 0)
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#else
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if(rfork(RFREND|RFNOTEG|RFNAMEG) < 0)
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#endif
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sysfatal("rfork: %r");
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close(0);
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open("/dev/null", OREAD);
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close(1);
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open("/dev/null", OWRITE);
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cmd = nil;
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ncmd = tflag = 0;
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ARGBEGIN{
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case '?':
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default:
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usage();
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break;
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case 'c':
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p = EARGF(usage());
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currfsysname = p;
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cmd = vtrealloc(cmd, (ncmd+1)*sizeof(char*));
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cmd[ncmd++] = p;
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break;
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case 'D':
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Dflag ^= 1;
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break;
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case 'f':
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p = EARGF(usage());
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currfsysname = foptname = p;
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readCmdPart(p, &cmd, &ncmd);
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break;
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case 'm':
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mempcnt = atoi(EARGF(usage()));
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if(mempcnt <= 0 || mempcnt >= 100)
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usage();
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break;
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case 't':
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tflag = 1;
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break;
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}ARGEND
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if(argc != 0)
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usage();
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consInit();
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cliInit();
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msgInit();
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conInit();
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cmdInit();
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fsysInit();
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exclInit();
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fidInit();
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srvInit();
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lstnInit();
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usersInit();
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for(i = 0; i < ncmd; i++)
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if(cliExec(cmd[i]) == 0)
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fprint(2, "%s: %r\n", cmd[i]);
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vtfree(cmd);
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if(tflag && consTTY() == 0)
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consPrint("%r\n");
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threadexits(0);
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}
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