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Annotation of researchv9/jerq/src/sysmon/sname.c, revision 1.1

1.1     ! root        1: #include "defs.h"
        !             2: #include <stdio.h>
        !             3: 
        !             4: /* imported */
        !             5: char *malloc();
        !             6: char *strcpy();
        !             7: char *strcat();
        !             8: 
        !             9: /* get the system name */
        !            10: char *
        !            11: getsysname()
        !            12: {
        !            13:     int i, fd;
        !            14:     char *cp;
        !            15:     static char name[DKNAMELEN+1];
        !            16: 
        !            17:     /* read the system name */
        !            18:     fd = open("/etc/whoami", 0);
        !            19:     if (fd < 0)
        !            20:        return (NULL);
        !            21:     i = read(fd, name, DKNAMELEN);
        !            22:     if (i <= 0) {
        !            23:        return (NULL);
        !            24:     }
        !            25:     (void)close (fd);
        !            26:     name[i] = NULL;
        !            27:     for (cp = name; *cp != 0 && *cp != '\n'; cp++);
        !            28:     *cp = NULL;
        !            29:     return (name);
        !            30: }
        !            31: 
        !            32: 
        !            33: /* make a name from the given system name and suffix */
        !            34: char *
        !            35: sname(sysname, generic)
        !            36: char *sysname;
        !            37: char *generic;
        !            38: {
        !            39:     static char name[DKNAMELEN+1];
        !            40:     int i,j;
        !            41: 
        !            42:     i = strlen(sysname);
        !            43:     j = strlen (generic);
        !            44:     if (i+j > DKNAMELEN) {
        !            45:        if (j >= DKNAMELEN)
        !            46:            return (NULL);
        !            47:        for (i = 0, j = DKNAMELEN - j; i <= j; i++) {
        !            48:            name[i] = sysname[i];
        !            49:        }
        !            50:        name[i] = 0;
        !            51:     } else {
        !            52:        (void)strcpy (name, sysname);
        !            53:     }
        !            54:     (void)strcat (name, generic);
        !            55:     return (name);
        !            56: }
        !            57: 
        !            58: /* ealloc with error reporting */
        !            59: char *
        !            60: ealloc(size)
        !            61: int size;
        !            62: {
        !            63:     char *ptr;
        !            64: 
        !            65:     ptr = malloc ((unsigned)size);
        !            66:     if (ptr == NULL) {
        !            67:        perror ("ealloc");
        !            68:        exit(-1);
        !            69:     }
        !            70:     return (ptr);
        !            71: }
        !            72: 

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