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54 lines
1.1 KiB
54 lines
1.1 KiB
/* © 2006-2007 Anselm R. Garbe <garbeam at gmail dot com> |
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* © 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com> |
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* See LICENSE file for license details. */ |
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#include "dwm.h" |
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#include <stdarg.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <sys/wait.h> |
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#include <unistd.h> |
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/* extern */ |
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void * |
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emallocz(unsigned int size) { |
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void *res = calloc(1, size); |
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if(!res) |
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eprint("fatal: could not malloc() %u bytes\n", size); |
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return res; |
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} |
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void |
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eprint(const char *errstr, ...) { |
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va_list ap; |
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va_start(ap, errstr); |
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vfprintf(stderr, errstr, ap); |
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va_end(ap); |
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exit(EXIT_FAILURE); |
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} |
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void |
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spawn(const char *arg) { |
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static char *shell = NULL; |
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if(!shell && !(shell = getenv("SHELL"))) |
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shell = "/bin/sh"; |
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if(!arg) |
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return; |
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/* The double-fork construct avoids zombie processes and keeps the code |
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* clean from stupid signal handlers. */ |
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if(fork() == 0) { |
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if(fork() == 0) { |
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if(dpy) |
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close(ConnectionNumber(dpy)); |
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setsid(); |
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execl(shell, shell, "-c", arg, (char *)NULL); |
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fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg); |
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perror(" failed"); |
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} |
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exit(0); |
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} |
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wait(0); |
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}
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