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comparison util.c @ 6:e0cefb3981c8

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implemented pipe_spawn
author Anselm R. Garbe <garbeam@wmii.de>
date Tue, 11 Jul 2006 11:10:05 +0200
parents e5018cae273f
children d567f430a81d
comparison
equal deleted inserted replaced
5:e5018cae273f 6:e0cefb3981c8
10 #include <sys/types.h> 10 #include <sys/types.h>
11 #include <sys/wait.h> 11 #include <sys/wait.h>
12 #include <unistd.h> 12 #include <unistd.h>
13 13
14 #include "util.h" 14 #include "util.h"
15
16 static char *shell = NULL;
15 17
16 void 18 void
17 error(char *errstr, ...) { 19 error(char *errstr, ...) {
18 va_list ap; 20 va_list ap;
19 va_start(ap, errstr); 21 va_start(ap, errstr);
80 *p1 = *p2; 82 *p1 = *p2;
81 *p2 = tmp; 83 *p2 = tmp;
82 } 84 }
83 85
84 void 86 void
85 spawn(Display *dpy, const char *shell, const char *cmd) 87 spawn(Display *dpy, const char *cmd)
86 { 88 {
87 if(!cmd || !shell) 89 if(!shell && !(shell = getenv("SHELL")))
90 shell = "/bin/sh";
91
92 if(!cmd)
88 return; 93 return;
89 if(fork() == 0) { 94 if(fork() == 0) {
90 if(fork() == 0) { 95 if(fork() == 0) {
96 setsid();
91 if(dpy) 97 if(dpy)
92 close(ConnectionNumber(dpy)); 98 close(ConnectionNumber(dpy));
93 execl(shell, shell, "-c", cmd, (const char *)0); 99 execlp(shell, "shell", "-c", cmd, NULL);
94 fprintf(stderr, "gridwm: execl %s", shell); 100 fprintf(stderr, "gridwm: execvp %s", cmd);
95 perror(" failed"); 101 perror(" failed");
96 } 102 }
97 exit (0); 103 exit (0);
98 } 104 }
99 wait(0); 105 wait(0);
100 } 106 }
107
108 void
109 pipe_spawn(char *buf, unsigned int len, Display *dpy, const char *cmd)
110 {
111 unsigned int l, n;
112 int pfd[2];
113
114 if(!shell && !(shell = getenv("SHELL")))
115 shell = "/bin/sh";
116
117 if(!cmd)
118 return;
119
120 if(pipe(pfd) == -1) {
121 perror("pipe");
122 exit(1);
123 }
124
125 if(fork() == 0) {
126 setsid();
127 if(dpy)
128 close(ConnectionNumber(dpy));
129 dup2(pfd[1], STDOUT_FILENO);
130 close(pfd[0]);
131 close(pfd[1]);
132 execlp(shell, "shell", "-c", cmd, NULL);
133 fprintf(stderr, "gridwm: execvp %s", cmd);
134 perror(" failed");
135 }
136 else {
137 n = 0;
138 close(pfd[1]);
139 while(l > n) {
140 if((l = read(pfd[0], buf + n, len - n)) < 1)
141 break;
142 n += l;
143 }
144 close(pfd[0]);
145 buf[n - 1] = 0;
146 }
147 wait(0);
148 }