| Commit | Line | Data |
|---|
| 79072805 |
1 | bool |
| 2 | do_exec(cmd) |
| 3 | char *cmd; |
| 4 | { |
| 5 | register char **a; |
| 6 | register char *s; |
| 7 | char flags[10]; |
| 8 | |
| 9 | /* save an extra exec if possible */ |
| 10 | |
| 11 | #ifdef CSH |
| 12 | if (strnEQ(cmd,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) { |
| 13 | strcpy(flags,"-c"); |
| 14 | s = cmd+cshlen+3; |
| 15 | if (*s == 'f') { |
| 16 | s++; |
| 17 | strcat(flags,"f"); |
| 18 | } |
| 19 | if (*s == ' ') |
| 20 | s++; |
| 21 | if (*s++ == '\'') { |
| 22 | char *ncmd = s; |
| 23 | |
| 24 | while (*s) |
| 25 | s++; |
| 26 | if (s[-1] == '\n') |
| 27 | *--s = '\0'; |
| 28 | if (s[-1] == '\'') { |
| 29 | *--s = '\0'; |
| 30 | execl(cshname,"csh", flags,ncmd,(char*)0); |
| 31 | *s = '\''; |
| 32 | return FALSE; |
| 33 | } |
| 34 | } |
| 35 | } |
| 36 | #endif /* CSH */ |
| 37 | |
| 38 | /* see if there are shell metacharacters in it */ |
| 39 | |
| 40 | /*SUPPRESS 530*/ |
| 41 | for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */ |
| 42 | if (*s == '=') |
| 43 | goto doshell; |
| 44 | for (s = cmd; *s; s++) { |
| 45 | if (*s != ' ' && !isALPHA(*s) && index("$&*(){}[]'\";\\|?<>~`\n",*s)) { |
| 46 | if (*s == '\n' && !s[1]) { |
| 47 | *s = '\0'; |
| 48 | break; |
| 49 | } |
| 50 | doshell: |
| 51 | execl("/bin/sh","sh","-c",cmd,(char*)0); |
| 52 | return FALSE; |
| 53 | } |
| 54 | } |
| 55 | New(402,Argv, (s - cmd) / 2 + 2, char*); |
| 56 | Cmd = nsavestr(cmd, s-cmd); |
| 57 | a = Argv; |
| 58 | for (s = Cmd; *s;) { |
| 59 | while (*s && isSPACE(*s)) s++; |
| 60 | if (*s) |
| 61 | *(a++) = s; |
| 62 | while (*s && !isSPACE(*s)) s++; |
| 63 | if (*s) |
| 64 | *s++ = '\0'; |
| 65 | } |
| 66 | *a = Nullch; |
| 67 | if (Argv[0]) { |
| 68 | execvp(Argv[0],Argv); |
| 69 | if (errno == ENOEXEC) { /* for system V NIH syndrome */ |
| 70 | do_execfree(); |
| 71 | goto doshell; |
| 72 | } |
| 73 | } |
| 74 | do_execfree(); |
| 75 | return FALSE; |
| 76 | } |
| 77 | |
projects / p5sagit/p5-mst-13.2.git / blame