From ce05175372a9ddca1a225db0765ace1127a39293 Mon Sep 17 00:00:00 2001 From: Nicholas Date: Fri, 12 Nov 2021 09:22:01 -0800 Subject: chore: simplified organizational structure --- src/cmd/dwm/util.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 src/cmd/dwm/util.c (limited to 'src/cmd/dwm/util.c') diff --git a/src/cmd/dwm/util.c b/src/cmd/dwm/util.c new file mode 100644 index 0000000..0db71cc --- /dev/null +++ b/src/cmd/dwm/util.c @@ -0,0 +1,66 @@ +/* See LICENSE file for copyright and license details. */ +#include "dwm.h" + +void +fatal(char *fmt, ...) { + va_list args; + + va_start(args, fmt); + vfprintf(stderr, fmt, args); + va_end(args); + + if(fmt[0] && fmt[strlen(fmt)-1] == ':') { + fputc(' ', stderr); + perror(NULL); + } else { + fputc('\n', stderr); + } + + exit(1); +} + +void * +ecalloc(size_t nmemb, size_t size) +{ + void *p; + + if (!(p = calloc(nmemb, size))) + fatal("calloc:"); + return p; +} + +pid_t +getparentprocess(pid_t p) +{ + uint v = 0; + +#if defined(__linux__) + io·Stream *f; + char buf[256]; + snprintf(buf, sizeof(buf) - 1, "/proc/%u/stat", (unsigned)p); + + if (!(f = fopen(buf, "r"))) + return (pid_t)0; + + if (fscanf(f, "%*u %*s %*c %u", (unsigned *)&v) != 1) + v = (pid_t)0; + fclose(f); +#elif defined(__FreeBSD__) + struct kinfo_proc *proc = kinfo_getproc(p); + if (!proc) + return (pid_t)0; + + v = proc->ki_ppid; + free(proc); +#endif + return (pid_t)v; +} + +int +isdescendent(pid_t p, pid_t c) +{ + while (p != c && c != 0) + c = getparentprocess(c); + + return (int)c; +} -- cgit v1.2.1