projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 1a5078b8 BJ |
1 | #include "sh.h" |
| 2 | ||
| 3 | execute(t, pf1, pf2) | |
| 4 | int *t, *pf1, *pf2; | |
| 5 | { | |
| 6 | int i, f, pv[2]; | |
| 7 | register *t1; | |
| 8 | char *cp1, *cp2; | |
| 9 | char *scp; | |
| 10 | ||
| 11 | if (t == 0) | |
| 12 | return; | |
| 13 | switch(t[DTYP]) { | |
| 14 | case TCOM: | |
| 15 | i = 100; | |
| 16 | do | |
| 17 | if (func(t)) | |
| 18 | return; | |
| 19 | while (--i && alias(&t[DCOM])); | |
| 20 | if (i == 0) { | |
| 21 | bferr2(t[DCOM], ": Alias loop detected"); | |
| 22 | return; | |
| 23 | } | |
| 24 | case TPAR: | |
| 25 | t1 = t; | |
| 26 | f = t1[DFLG]; | |
| 27 | i = 0; | |
| 28 | if ((f&FPAR) == 0) | |
| 29 | i = fork(); | |
| 30 | if (i == -1) { | |
| 31 | err("No more processes"); | |
| 32 | return; | |
| 33 | } | |
| 34 | if (i != 0) { | |
| 35 | if ((f&FPIN) != 0) { | |
| 36 | close(pf1[0]); | |
| 37 | close(pf1[1]); | |
| 38 | } | |
| 39 | if ((f&FPRS) != 0) { | |
| 40 | prn(i); | |
| 41 | prs("\n"); | |
| 42 | set(pcs, putn(i)); | |
| 43 | } | |
| 44 | if ((f&FAND) != 0) | |
| 45 | return; | |
| 46 | if ((f&FPOU) == 0) | |
| 47 | pwait(i); | |
| 48 | return; | |
| 49 | } | |
| 50 | set(prompt,""); | |
| 51 | unsetv(prompt); | |
| 52 | if ((cp1 = t1[DLEF]) != 0) { | |
| 53 | close(0); | |
| 54 | cp1 = globone(cp1); | |
| 55 | if (cp1 == 0) | |
| 56 | exit(1); | |
| 57 | strip(cp1); | |
| 58 | if (open(cp1, 0) < 0) { | |
| 59 | prs(cp1); | |
| 60 | err(": Cannot open"); | |
| 61 | exit(1); | |
| 62 | } | |
| 63 | } | |
| 64 | if ((cp2 = t1[DRIT]) != 0) { | |
| 65 | while (*cp2) | |
| 66 | *cp2++ =& 0177; | |
| 67 | strip(cp2); | |
| 68 | cp2 = t1[DRIT]; | |
| 69 | close(1); | |
| 70 | if ((f&FCAT) != 0 && open(cp2, 1) >= 0) | |
| 71 | seek(1, 0, 2); | |
| 72 | else if (creat(cp2, 0644) < 0) { | |
| 73 | prs(t1[DRIT]); | |
| 74 | err(": Cannot create"); | |
| 75 | exit(1); | |
| 76 | } | |
| 77 | } | |
| 78 | if ((f&FPIN) != 0) { | |
| 79 | close(0); | |
| 80 | dup(pf1[0]); | |
| 81 | close(pf1[0]); | |
| 82 | close(pf1[1]); | |
| 83 | } | |
| 84 | if ((f&FPOU) != 0) { | |
| 85 | close(1); | |
| 86 | dup(pf2[1]); | |
| 87 | close(pf2[0]); | |
| 88 | close(pf2[1]); | |
| 89 | } | |
| 90 | if (f&FDIAG) { | |
| 91 | close(2); | |
| 92 | dup(1); | |
| 93 | } | |
| 94 | if ((f&FINT)!=0 && t1[DLEF]==0 && (f&FPIN)==0) { | |
| 95 | close(0); | |
| 96 | open("/dev/null", 0); | |
| 97 | } | |
| 98 | if ((f&FINT) == 0 && setintr) { | |
| 99 | signal(INTR, 0); | |
| 100 | signal(QUIT, 0); | |
| 101 | } | |
| 102 | if (t1[DTYP] == TPAR) { | |
| 103 | if (t1 = t1[DSPR]) | |
| 104 | t1[DFLG] =| f&FINT; | |
| 105 | execute(t1); | |
| 106 | exit(1); | |
| 107 | } | |
| 108 | doexec(t1); | |
| 109 | /* no return */ | |
| 110 | case TFIL: | |
| 111 | f = t[DFLG]; | |
| 112 | pipe(pv); | |
| 113 | t1 = t[DLEF]; | |
| 114 | t1[DFLG] =| FPOU | (f&(FPIN|FINT|FPRS|FDIAG)); | |
| 115 | execute(t1, pf1, pv); | |
| 116 | t1 = t[DRIT]; | |
| 117 | t1[DFLG] =| FPIN | (f&(FPOU|FINT|FAND|FPRS)); | |
| 118 | execute(t1, pv, pf2); | |
| 119 | return; | |
| 120 | case TLST: | |
| 121 | f = t[DFLG]&FINT; | |
| 122 | if (t1 = t[DLEF]) | |
| 123 | t1[DFLG] =| f; | |
| 124 | execute(t1); | |
| 125 | if (t1 = t[DRIT]) | |
| 126 | t1[DFLG] =| f; | |
| 127 | execute(t1); | |
| 128 | return; | |
| 129 | } | |
| 130 | } | |
| 131 | ||
| 132 | strip(cp) | |
| 133 | register char *cp; | |
| 134 | { | |
| 135 | ||
| 136 | while (*cp++ =& 0177) | |
| 137 | continue; | |
| 138 | } |